test/test-suite.js

(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined'
    ? (module.exports = factory())
    : typeof define === 'function' && define.amd
    ? define(factory)
    : ((global =
        typeof globalThis !== 'undefined' ? globalThis : global || self),
      (global.testSuite = factory()));
})(this, function () {
  return function testSuite(
    DOMPurify,
    window,
    sanitizationTestCases,
    xssTestCases
  ) {
    var document = window.document;
    var jQuery = window.jQuery;

    sanitizationTestCases.forEach((testCase) => {
      QUnit.test(`Sanitization test[${testCase.title}]`, (assert) => {
        assert.contains(
          DOMPurify.sanitize(testCase.payload),
          testCase.expected,
          `Payload: ${testCase.payload}`
        );
      });
    });

    // XSS tests: Native DOM methods (alert() should not be called)
    xssTestCases.forEach((testCase) => {
      QUnit.test(`XSS test: native[${testCase.title}]`, (assert) => {
        document.getElementById('qunit-fixture').innerHTML = DOMPurify.sanitize(
          testCase.payload
        );
        const done = assert.async();
        setTimeout(() => {
          assert.notEqual(window.xssed, true, 'alert() was called');
          // Teardown
          document.getElementById('qunit-fixture').innerHTML = '';
          window.xssed = false;
          done();
        }, 100);
      });
    });
    // XSS tests: jQuery (alert() should not be called)
    xssTestCases.forEach((testCase) => {
      QUnit.test(`XSS test: jQuery[${testCase.title}]`, (assert) => {
        jQuery('#qunit-fixture').html(DOMPurify.sanitize(testCase.payload));
        const done = assert.async();
        setTimeout(() => {
          assert.notEqual(window.xssed, true, 'alert() was called');
          // Teardown
          jQuery('#qunit-fixture').empty();
          window.xssed = false;
          done();
        }, 100);
      });
    });
    // document.write tests to handle FF's strange behavior
    xssTestCases.forEach((testCase) => {
      QUnit.test(
        `XSS test: document.write() into iframe[${testCase.title}]`,
        (assert) => {
          const done = assert.async();
          const iframe = document.createElement('iframe');
          iframe.src = 'about:blank';
          iframe.onload = function () {
            iframe.contentDocument.write(
              '<script>window.alert=function(){top.xssed=true;}</script>' +
                DOMPurify.sanitize(testCase.payload)
            );
            assert.notEqual(
              window.xssed,
              true,
              'alert() was called from document.write()'
            );
            window.xssed = false;
            iframe.parentNode.removeChild(iframe);
            done();
          };
          document.body.appendChild(iframe);
        }
      );
    });

    // Config-Flag Tests
    QUnit.test(
      'Config-Flag tests: KEEP_CONTENT + ALLOWED_TAGS / ALLOWED_ATTR',
      function (assert) {
        // KEEP_CONTENT + ALLOWED_TAGS / ALLOWED_ATTR
        assert.equal(
          DOMPurify.sanitize('<iframe>Hello</iframe>', { KEEP_CONTENT: false }),
          ''
        );
        assert.contains(
          DOMPurify.sanitize(
            '<a href="#">abc<b style="color:red">123</b><q class="cite">123</b></a>',
            {
              ALLOWED_TAGS: ['b', 'q'],
              ALLOWED_ATTR: ['style'],
              KEEP_CONTENT: true,
            }
          ),
          [
            'abc<b style="color:red">123</b><q>123</q>',
            'abc<b style="color: red;">123</b><q>123</q>',
          ]
        );
        assert.equal(
          DOMPurify.sanitize(
            '<a href="#">abc<b style="color:red">123</b><q class="cite">123</b></a>',
            {
              ALLOWED_TAGS: ['b', 'q'],
              ALLOWED_ATTR: ['style'],
              KEEP_CONTENT: false,
            }
          ),
          ''
        );
        assert.equal(
          DOMPurify.sanitize('<a href="#">abc</a>', {
            ALLOWED_TAGS: ['b', 'q'],
            KEEP_CONTENT: false,
          }),
          ''
        );
        assert.equal(
          DOMPurify.sanitize('<form><input name="parentNode"></form>', {
            ALLOWED_TAGS: ['input'],
            KEEP_CONTENT: true,
          }),
          '<input>'
        );
      }
    );
    QUnit.test('Config-Flag tests: ALLOW_SELF_CLOSE_IN_ATTR', function (assert) {
      // ALLOW_SELF_CLOSE_IN_ATTR
      assert.equal(
        DOMPurify.sanitize('<a href="#" class="foo <br/>">abc</a>', {
          ALLOW_SELF_CLOSE_IN_ATTR: false,
        }),
        '<a href="#">abc</a>'
      );
      assert.equal(
        DOMPurify.sanitize('<a href="#" class="foo <br/>">abc</a>', {
          ALLOW_SELF_CLOSE_IN_ATTR: true,
        }),
        '<a class="foo <br/>" href="#">abc</a>'
      );
    });
    QUnit.test('Config-Flag tests: ALLOW_DATA_ATTR', function (assert) {
      // ALLOW_DATA_ATTR
      assert.equal(
        DOMPurify.sanitize('<a href="#" data-abc"="foo">abc</a>', {
          ALLOW_DATA_ATTR: true,
        }),
        '<a href="#">abc</a>'
      );
      assert.equal(
        DOMPurify.sanitize('<a href="#" data-abc="foo">abc</a>', {
          ALLOW_DATA_ATTR: false,
        }),
        '<a href="#">abc</a>'
      );
      assert.contains(
        DOMPurify.sanitize('<a href="#" data-abc="foo">abc</a>', {
          ALLOW_DATA_ATTR: true,
        }),
        [
          '<a data-abc="foo" href="#">abc</a>',
          '<a href="#" data-abc="foo">abc</a>',
        ]
      );
      assert.contains(
        DOMPurify.sanitize('<a href="#" data-abc-1-2-3="foo">abc</a>', {
          ALLOW_DATA_ATTR: true,
        }),
        [
          '<a data-abc-1-2-3="foo" href="#">abc</a>',
          '<a href="#" data-abc-1-2-3="foo">abc</a>',
        ]
      );
      assert.equal(
        DOMPurify.sanitize('<a href="#" data-""="foo">abc</a>', {
          ALLOW_DATA_ATTR: true,
        }),
        '<a href="#">abc</a>'
      );
      assert.contains(
        DOMPurify.sanitize('<a href="#" data-äöü="foo">abc</a>', {
          ALLOW_DATA_ATTR: true,
        }),
        [
          '<a href="#" data-äöü="foo">abc</a>',
          '<a data-äöü="foo" href="#">abc</a>',
        ]
      );
      assert.contains(
        DOMPurify.sanitize('<a href="#" data-\u00B7._="foo">abc</a>', {
          ALLOW_DATA_ATTR: true,
        }),
        [
          '<a data-\u00B7._="foo" href="#">abc</a>',
          '<a href="#">abc</a>',
          '<a href="#" data-·._="foo">abc</a>',
        ] // IE11 and Edge throw an InvalidCharacterError
      );
      assert.equal(
        DOMPurify.sanitize('<a href="#" data-\u00B5="foo">abc</a>', {
          ALLOW_DATA_ATTR: true,
        }),
        '<a href="#">abc</a>'
      );
      assert.equal(
        DOMPurify.sanitize('<a href="#" data-evil="foo">abc</a>', {
          FORBID_ATTR: ['data-evil'],
        }),
        '<a href="#">abc</a>'
      );
      assert.equal(
        DOMPurify.sanitize('<a href="#" data-evil="foo">abc</a>', {
          ALLOW_DATA_ATTR: true,
          FORBID_ATTR: ['data-evil'],
        }),
        '<a href="#">abc</a>'
      );
    });
    QUnit.test('Config-Flag tests: ADD_TAGS', function (assert) {
      // ADD_TAGS
      assert.equal(
        DOMPurify.sanitize('<my-component>abc</my-component>', {
          ADD_TAGS: ['my-component'],
        }),
        '<my-component>abc</my-component>'
      );
    });
    QUnit.test('Config-Flag tests: ADD_TAGS + ADD_ATTR', function (assert) {
      // ADD_TAGS + ADD_ATTR
      assert.equal(
        DOMPurify.sanitize('<my-component my-attr="foo">abc</my-component>', {
          ADD_TAGS: ['my-component'],
        }),
        '<my-component>abc</my-component>'
      );
      assert.equal(
        DOMPurify.sanitize('<my-component my-attr="foo">abc</my-component>', {
          ADD_TAGS: ['my-component'],
          ADD_ATTR: ['my-attr'],
        }),
        '<my-component my-attr="foo">abc</my-component>'
      );
    });
    QUnit.test(
      'Config-Flag tests: FORBID_CONTENTS + FORBID_TAGS',
      function (assert) {
        // FORBID_CONTENTS + FORBID_TAGS
        assert.equal(
          DOMPurify.sanitize(
            '<div><b>preserve me</b></div><p><b>no not preserve me</b></p>',
            { FORBID_CONTENTS: ['p'], FORBID_TAGS: ['div', 'p'] }
          ),
          '<b>preserve me</b>'
        );
      }
    );
    QUnit.test(
      'Config-Flag tests: SAFE_FOR_JQUERY (now inactive, secure by default)',
      function (assert) {
        assert.equal(
          DOMPurify.sanitize(
            '<a>123</a><option><style><img src=x onerror=alert(1)>'
          ),
          '<a>123</a><option></option>'
        );
        assert.equal(
          DOMPurify.sanitize(
            '<a>123</a><option><style><img src=x onerror=alert(1)>'
          ),
          '<a>123</a><option></option>'
        );
        assert.equal(
          DOMPurify.sanitize(
            '<option><style></option></select><b><img src=xx: onerror=alert(1)></style></option>'
          ),
          '<option></option>'
        );
        assert.equal(
          DOMPurify.sanitize(
            '<option><iframe></select><b><script>alert(1)</script>'
          ),
          '<option></option>'
        );
        assert.equal(
          DOMPurify.sanitize(
            '<option><iframe></select><b><script>alert(1)</script>'
          ),
          '<option></option>'
        );
        assert.equal(
          DOMPurify.sanitize(
            '<b><style><style/><img src=xx: onerror=alert(1)>'
          ),
          '<b></b>'
        );
        assert.equal(
          DOMPurify.sanitize(
            '<b><style><style/><img src=xx: onerror=alert(1)>'
          ),
          '<b></b>'
        );
        assert.contains(
          DOMPurify.sanitize('1<template><s>000</s></template>2'),
          ['1<template><s>000</s></template>2', '1<template></template>2', '12']
        );
        assert.contains(DOMPurify.sanitize('<template><s>000</s></template>'), [
          '',
          '<template><s>000</s></template>',
        ]);
        // see https://github.com/cure53/DOMPurify/issues/283
        assert.equal(
          DOMPurify.sanitize('<i>&amp;amp; &lt;</i>'),
          '<i>&amp;amp; &lt;</i>'
        );
      }
    );
    QUnit.test('Config-Flag tests: SAFE_FOR_TEMPLATES', function (assert) {
      //SAFE_FOR_TEMPLATES
      assert.equal(
        DOMPurify.sanitize(
          '<a>123{{456}}<b><style><% alert(1) %></style>456</b></a>',
          { SAFE_FOR_TEMPLATES: true }
        ),
        '<a> <b><style> </style>456</b></a>'
      );
      assert.equal(
        DOMPurify.sanitize('<a data-bind="style: alert(1)"></a>', {
          SAFE_FOR_TEMPLATES: true,
        }),
        '<a></a>'
      );
      assert.equal(
        DOMPurify.sanitize('<a data-harmless=""></a>', {
          SAFE_FOR_TEMPLATES: true,
          ALLOW_DATA_ATTR: true,
        }),
        '<a></a>'
      );
      assert.equal(
        DOMPurify.sanitize('<a data-harmless=""></a>', {
          SAFE_FOR_TEMPLATES: false,
          ALLOW_DATA_ATTR: false,
        }),
        '<a></a>'
      );
      assert.equal(
        DOMPurify.sanitize(
          '<a>{{123}}{{456}}<b><style><% alert(1) %><% 123 %></style>456</b></a>',
          { SAFE_FOR_TEMPLATES: true }
        ),
        '<a> <b><style> </style>456</b></a>'
      );
      assert.equal(
        DOMPurify.sanitize(
          '<a>{{123}}abc{{456}}<b><style><% alert(1) %>def<% 123 %></style>456</b></a>',
          { SAFE_FOR_TEMPLATES: true }
        ),
        '<a> <b><style> </style>456</b></a>'
      );
      assert.equal(
        DOMPurify.sanitize(
          '<a>123{{45{{6}}<b><style><% alert(1)%> %></style>456</b></a>',
          { SAFE_FOR_TEMPLATES: true }
        ),
        '<a> <b><style> </style>456</b></a>'
      );
      assert.equal(
        DOMPurify.sanitize(
          '<a>123{{45}}6}}<b><style><% <%alert(1) %></style>456</b></a>',
          { SAFE_FOR_TEMPLATES: true }
        ),
        '<a> <b><style> </style>456</b></a>'
      );
      assert.equal(
        DOMPurify.sanitize(
          '<a>123{{<b>456}}</b><style><% alert(1) %></style>456</a>',
          { SAFE_FOR_TEMPLATES: true }
        ),
        '<a>123 <b> </b><style> </style>456</a>'
      );
      assert.contains(
        DOMPurify.sanitize(
          '<b>{{evil<script>alert(1)</script><form><img src=x name=textContent></form>}}</b>',
          { SAFE_FOR_TEMPLATES: true }
        ),
        ['<b>  </b>', '<b> </b>', '<b> <form><img src="x"></form> </b>']
      );
      assert.contains(
        DOMPurify.sanitize(
          '<b>he{{evil<script>alert(1)</script><form><img src=x name=textContent></form>}}ya</b>',
          { SAFE_FOR_TEMPLATES: true }
        ),
        [
          '<b>he  ya</b>',
          '<b>he </b>',
          '<b>he <form><img src="x"></form> ya</b>',
        ]
      );
      assert.equal(
        DOMPurify.sanitize(
          '<a>123<% <b>456}}</b><style>{{ alert(1) }}</style>456 %></a>',
          { SAFE_FOR_TEMPLATES: true }
        ),
        '<a>123 <b> </b><style> </style> </a>'
      );
      assert.equal(
        DOMPurify.sanitize('<a href="}}javascript:alert(1)"></a>', {
          SAFE_FOR_TEMPLATES: true,
        }),
        '<a></a>'
      );
      assert.equal(
        DOMPurify.sanitize('<a class="{{999-333}}"></a>', {
          SAFE_FOR_TEMPLATES: true,
        }),
        '<a class=" "></a>'
      );
      assert.equal(
        DOMPurify.sanitize('{{999-333}}', { SAFE_FOR_TEMPLATES: true }),
        ' '
      );
      assert.equal(
        DOMPurify.sanitize('{<x>{333+333}<x>}', { SAFE_FOR_TEMPLATES: true }),
        ' '
      );
    });
    QUnit.test('Config-Flag tests: SANITIZE_DOM', function (assert) {
      // SANITIZE_DOM
      assert.equal(
        DOMPurify.sanitize('<img src="x" name="implementation">', {
          SANITIZE_DOM: true,
        }),
        '<img src="x">'
      );
      assert.equal(
        DOMPurify.sanitize('<img src="x" name="createNodeIterator">', {
          SANITIZE_DOM: true,
        }),
        '<img src="x">'
      );
      assert.equal(
        DOMPurify.sanitize('<img src="x" name="getElementById">', {
          SANITIZE_DOM: false,
        }),
        '<img name="getElementById" src="x">'
      );
      assert.equal(
        DOMPurify.sanitize('<img src="x" name="getElementById">', {
          SANITIZE_DOM: true,
        }),
        '<img src="x">'
      );
      assert.equal(
        DOMPurify.sanitize('<a href="x" id="location">click</a>', {
          SANITIZE_DOM: true,
        }),
        '<a href="x">click</a>'
      );
      assert.contains(
        DOMPurify.sanitize('<form><input name="attributes"></form>', {
          ADD_TAGS: ['form'],
          SANITIZE_DOM: false,
        }),
        ['', '<form><input name="attributes"></form>']
      );
      assert.contains(
        DOMPurify.sanitize('<form><input name="attributes"></form>', {
          ADD_TAGS: ['form'],
          SANITIZE_DOM: true,
        }),
        ['', '<form><input name="attributes"></form>', '<form><input></form>']
      );
    });
    QUnit.test('Config-Flag tests: SANITIZE_NAMED_PROPS', function (assert) {
      // SANITIZE_NAMED_PROPS
      assert.equal(
        DOMPurify.sanitize('<a id="x"></a>', {
          SANITIZE_NAMED_PROPS: true,
        }),
        '<a id="user-content-x"></a>'
      );
      assert.equal(
        DOMPurify.sanitize('<form id="x"><input id="y"></form>', {
          SANITIZE_NAMED_PROPS: true,
        }),
        '<form id="user-content-x"><input id="user-content-y"></form>'
      );
      assert.equal(
        DOMPurify.sanitize('<a id="x"></a><a id="x"></a>', {
          SANITIZE_NAMED_PROPS: true,
        }),
        '<a id="user-content-x"></a><a id="user-content-x"></a>'
      );
    });
    QUnit.test('Config-Flag tests: WHOLE_DOCUMENT', function (assert) {
      //WHOLE_DOCUMENT
      assert.equal(DOMPurify.sanitize('123', { WHOLE_DOCUMENT: false }), '123');
      assert.equal(
        DOMPurify.sanitize('123', { WHOLE_DOCUMENT: true }),
        '<html><head></head><body>123</body></html>'
      );
      assert.equal(
        DOMPurify.sanitize('<style>*{color:red}</style>', {
          WHOLE_DOCUMENT: false,
        }),
        ''
      );
      assert.equal(
        DOMPurify.sanitize('<style>*{color:red}</style>', {
          WHOLE_DOCUMENT: true,
        }),
        '<html><head><style>*{color:red}</style></head><body></body></html>'
      );
      assert.equal(
        DOMPurify.sanitize('123<style>*{color:red}</style>', {
          WHOLE_DOCUMENT: false,
        }),
        '123<style>*{color:red}</style>'
      );
      assert.equal(
        DOMPurify.sanitize('123<style>*{color:red}</style>', {
          WHOLE_DOCUMENT: true,
        }),
        '<html><head></head><body>123<style>*{color:red}</style></body></html>'
      );
      assert.equal(
        DOMPurify.sanitize('<!DOCTYPE html><html><body>123</body></html>', {
          WHOLE_DOCUMENT: true,
        }),
        '<html><head></head><body>123</body></html>'
      );
      assert.equal(
        DOMPurify.sanitize('<!DOCTYPE html><html><body>123</body></html>', {
          WHOLE_DOCUMENT: true,
          ADD_TAGS: ['!doctype'],
        }),
        '<!DOCTYPE html>\n<html><head></head><body>123</body></html>'
      );
    });
    QUnit.test('Config-Flag tests: RETURN_DOM', function (assert) {
      //RETURN_DOM
      assert.equal(
        DOMPurify.sanitize('<a>123<b>456</b></a>', { RETURN_DOM: true })
          .outerHTML,
        '<body><a>123<b>456</b></a></body>'
      );
      assert.equal(
        DOMPurify.sanitize('<a>123<b>456<script>alert(1)</script></b></a>', {
          RETURN_DOM: true,
        }).outerHTML,
        '<body><a>123<b>456</b></a></body>'
      );
      assert.equal(
        DOMPurify.sanitize('<a>123<b>456</b></a>', {
          RETURN_DOM: true,
          WHOLE_DOCUMENT: true,
        }).outerHTML,
        '<html><head></head><body><a>123<b>456</b></a></body></html>'
      );
      assert.equal(
        DOMPurify.sanitize('<a>123<b>456<script>alert(1)</script></b></a>', {
          RETURN_DOM: true,
          WHOLE_DOCUMENT: true,
        }).outerHTML,
        '<html><head></head><body><a>123<b>456</b></a></body></html>'
      );
      assert.equal(
        DOMPurify.sanitize('123', { RETURN_DOM: true }).outerHTML,
        '<body>123</body>'
      );
    });
    QUnit.test('Config-Flag tests: shadowroot', function (assert) {
      assert.notEqual(
        DOMPurify.sanitize('123', {
          RETURN_DOM: true,
        }).ownerDocument,
        document
      );
      assert.equal(
        DOMPurify.sanitize('123', {
          RETURN_DOM: true,
          ADD_ATTR: ['shadowroot'],
        }).ownerDocument,
        document
      );
      assert.notEqual(
        DOMPurify.sanitize('123', {
          RETURN_DOM_FRAGMENT: true,
        }).ownerDocument,
        document
      );
      assert.equal(
        DOMPurify.sanitize('123', {
          RETURN_DOM_FRAGMENT: true,
          ADD_ATTR: ['shadowroot'],
        }).ownerDocument,
        document
      );
    });
    QUnit.test('Config-Flag tests: RETURN_DOM_FRAGMENT', function (assert) {
      //RETURN_DOM_FRAGMENT
      // attempt clobbering
      var fragment = DOMPurify.sanitize(
        'foo<img id="createDocumentFragment">',
        {
          RETURN_DOM_FRAGMENT: true,
        }
      );
      assert.equal(fragment.nodeType, 11);
      assert.notEqual(fragment.ownerDocument, document);
      assert.equal(fragment.firstChild && fragment.firstChild.nodeValue, 'foo');
      // again, but without SANITIZE_DOM
      fragment = DOMPurify.sanitize('foo<img id="createDocumentFragment">', {
        RETURN_DOM_FRAGMENT: true,
        SANITIZE_DOM: false,
      });
      assert.equal(fragment.nodeType, 11);
      assert.notEqual(fragment.ownerDocument, document);
      assert.equal(fragment.firstChild && fragment.firstChild.nodeValue, 'foo');
    });
    QUnit.test('Config-Flag tests: RETURN_DOM_FRAGMENT', function (assert) {
      var xss = `<body><div><template shadowroot=open><img src=x onerror=alert(3)></template></div></body>`;
      var dom_body = DOMPurify.sanitize(xss, { RETURN_DOM: true });
      assert.equal(
        dom_body.outerHTML,
        '<body><div><template><img src="x"></template></div></body>'
      );
    });
    QUnit.test('Config-Flag tests: IN_PLACE', function (assert) {
      //IN_PLACE
      var dirty = document.createElement('a');
      dirty.setAttribute('href', 'javascript:alert(1)');
      var clean = DOMPurify.sanitize(dirty, { IN_PLACE: true });
      assert.equal(dirty, clean); // should return the input node
      assert.equal(dirty.href, ''); // should still sanitize
    });
    QUnit.test(
      'Config-Flag tests: IN_PLACE insecure root-nodes',
      function (assert) {
        //IN_PLACE with insecure root node (script)
        var dirty = document.createElement('script');
        dirty.setAttribute('src', 'data:,alert(1)');
        assert.throws(function () {
          DOMPurify.sanitize(dirty, { IN_PLACE: true });
        });
      }
    );
    QUnit.test(
      'Config-Flag tests: IN_PLACE insecure root-nodes',
      function (assert) {
        //IN_PLACE with insecure root node (iframe)
        var dirty = document.createElement('iframe');
        dirty.setAttribute('src', 'javascript:alert(1)');
        assert.throws(function () {
          DOMPurify.sanitize(dirty, { IN_PLACE: true });
        });
      }
    );
    QUnit.test('Config-Flag tests: FORBID_TAGS', function (assert) {
      //FORBID_TAGS
      assert.equal(
        DOMPurify.sanitize('<a>123<b>456</b></a>', { FORBID_TAGS: ['b'] }),
        '<a>123456</a>'
      );
      assert.equal(
        DOMPurify.sanitize('<a>123<b>456<script>alert(1)</script></b></a>789', {
          FORBID_TAGS: ['a', 'b'],
        }),
        '123456789'
      );
      assert.equal(
        DOMPurify.sanitize('<a>123<b>456</b></a>', { FORBID_TAGS: ['c'] }),
        '<a>123<b>456</b></a>'
      );
      assert.equal(
        DOMPurify.sanitize('<a>123<b>456<script>alert(1)</script></b></a>789', {
          FORBID_TAGS: ['script', 'b'],
        }),
        '<a>123456</a>789'
      );
      assert.equal(
        DOMPurify.sanitize('<a>123<b>456</b></a>', {
          ADD_TAGS: ['b'],
          FORBID_TAGS: ['b'],
        }),
        '<a>123456</a>'
      );
    });
    QUnit.test('Config-Flag tests: FORBID_ATTR', function (assert) {
      //FORBID_ATTR
      assert.equal(
        DOMPurify.sanitize('<a x="1">123<b>456</b></a>', {
          FORBID_ATTR: ['x'],
        }),
        '<a>123<b>456</b></a>'
      );
      assert.equal(
        DOMPurify.sanitize(
          '<a class="0" x="1">123<b y="1">456<script>alert(1)</script></b></a>789',
          { FORBID_ATTR: ['x', 'y'] }
        ),
        '<a class="0">123<b>456</b></a>789'
      );
      assert.equal(
        DOMPurify.sanitize('<a y="1">123<b y="1" y="2">456</b></a>', {
          FORBID_ATTR: ['y'],
        }),
        '<a>123<b>456</b></a>'
      );
      assert.equal(
        DOMPurify.sanitize(
          '<a>123<b x="1">456<script y="1">alert(1)</script></b></a>789',
          { FORBID_ATTR: ['x', 'y'] }
        ),
        '<a>123<b>456</b></a>789'
      );
    });
    QUnit.test(
      'Config-Param tests: CUSTOM_ELEMENT_HANDLING',
      function (assert) {
        //CUSTOM_ELEMENT_HANDLING
        assert.equal(
          DOMPurify.sanitize(
            '<foo-bar baz="foobar" forbidden="true"></foo-bar><div is="foo-baz"></div>',
            {
              CUSTOM_ELEMENT_HANDLING: {
                tagNameCheck: /^foo-/,
                attributeNameCheck: /baz/,
                allowCustomizedBuiltInElements: true,
              },
            }
          ),
          '<foo-bar baz="foobar"></foo-bar><div is="foo-baz"></div>'
        );
        assert.equal(
          DOMPurify.sanitize(
            '<foo-bar baz="foobar" forbidden="true"></foo-bar><div is="foo-baz"></div>',
            {
              CUSTOM_ELEMENT_HANDLING: {
                tagNameCheck: /^foo-/,
                attributeNameCheck: /baz/,
                allowCustomizedBuiltInElements: false,
              },
            }
          ),
          '<foo-bar baz="foobar"></foo-bar><div is=""></div>'
        );
        assert.equal(
          DOMPurify.sanitize(
            '<foo-bar baz="foobar" forbidden="true"></foo-bar><div is="foo-baz"></div>',
            {
              CUSTOM_ELEMENT_HANDLING: {
                tagNameCheck: /-bar$/,
                attributeNameCheck: /.+/,
                allowCustomizedBuiltInElements: true,
              },
            }
          ), // DOMPurify swaps the order of attributes here!
          '<foo-bar forbidden="true" baz="foobar"></foo-bar><div is=""></div>'
        );
        assert.equal(
          DOMPurify.sanitize(
            '<foo-bar baz="foobar" forbidden="true"></foo-bar><div is="foo-baz"></div>',
            {
              CUSTOM_ELEMENT_HANDLING: {
                tagNameCheck: (tagName) => tagName.match(/^foo-/),
                attributeNameCheck: (attr) => attr.match(/baz/),
                allowCustomizedBuiltInElements: true,
              },
            }
          ),
          '<foo-bar baz="foobar"></foo-bar><div is="foo-baz"></div>'
        );
        assert.equal(
          DOMPurify.sanitize(
            '<foo-bar baz="foobar" forbidden="true"></foo-bar><div is="foo-baz"></div>',
            {
              CUSTOM_ELEMENT_HANDLING: {
                tagNameCheck: (tagName) => tagName.match(/-bar$/),
                attributeNameCheck: (attr) => attr.match(/baz/),
                allowCustomizedBuiltInElements: true,
              },
            }
          ),
          '<foo-bar baz="foobar"></foo-bar><div is=""></div>'
        );
        assert.equal(
          DOMPurify.sanitize(
            '<my-paragraph><span slot="my-text">test</span></my-paragraph>',
            {
              CUSTOM_ELEMENT_HANDLING: { tagNameCheck: /-/u },
            }
          ),
          '<my-paragraph><span slot="my-text">test</span></my-paragraph>'
        );
      }
    );
    QUnit.test(
      'CUSTOM_ELEMENT_HANDLING config values of null do not throw a TypeError.',
      function (assert) {
        DOMPurify.sanitize('', {
          CUSTOM_ELEMENT_HANDLING: {
            tagNameCheck: null,
            attributeNameCheck: null,
            allowCustomizedBuiltInElements: null,
          },
        });
    
        // Don't see a great way to assert NOT throws...
        assert.ok(true);
      }
    );
    QUnit.test('Test dirty being an array', function (assert) {
      assert.equal(
        DOMPurify.sanitize(['<a>123<b>456</b></a>']),
        '<a>123<b>456</b></a>'
      );
      assert.equal(
        DOMPurify.sanitize(['<img src=', 'x onerror=alert(1)>']),
        '<img src=",x">'
      );
    });
    // cross-check that document.write into iframe works properly
    QUnit.test('XSS test: document.write() into iframe', function (assert) {
      const done = assert.async();
      window.xssed = false;
      var iframe = document.createElement('iframe');
      iframe.src = 'about:blank';
      iframe.onload = function () {
        iframe.contentDocument.write(
          '<script>window.alert=function(){parent.xssed=true;}</script><script>alert(1);</script>'
        );
        assert.equal(window.xssed, true, 'alert() was called but not detected');
        window.xssed = false;
        iframe.parentNode.removeChild(iframe);
        done();
      };
      document.body.appendChild(iframe);
    });
    // Check for isSupported property
    QUnit.test('DOMPurify property tests', function (assert) {
      assert.equal(typeof DOMPurify.isSupported, 'boolean');
    });
    // Test with a custom window object
    QUnit.test('DOMPurify custom window tests', function (assert) {
      assert.strictEqual(typeof DOMPurify(null).version, 'string');
      assert.strictEqual(DOMPurify(null).isSupported, false);
      assert.strictEqual(DOMPurify(null).sanitize, undefined);
      assert.strictEqual(typeof DOMPurify({}).version, 'string');
      assert.strictEqual(DOMPurify({}).isSupported, false);
      assert.strictEqual(DOMPurify({}).sanitize, undefined);
      assert.strictEqual(
        typeof DOMPurify({
          document: 'not really a document',
          Element: window.Element,
        }).version,
        'string'
      );
      assert.strictEqual(
        DOMPurify({
          document: 'not really a document',
          Element: window.Element,
        }).isSupported,
        false
      );
      assert.strictEqual(
        DOMPurify({
          document: 'not really a document',
          Element: window.Element,
        }).sanitize,
        undefined
      );
      assert.strictEqual(
        typeof DOMPurify({ document, Element: undefined }).version,
        'string'
      );
      assert.strictEqual(
        DOMPurify({ document, Element: undefined }).isSupported,
        false
      );
      assert.strictEqual(
        DOMPurify({ document, Element: undefined }).sanitize,
        undefined
      );
      assert.strictEqual(
        typeof DOMPurify({ document, Element: window.Element }).version,
        'string'
      );
      assert.strictEqual(
        typeof DOMPurify({ document, Element: window.Element }).sanitize,
        'function'
      );
      assert.strictEqual(typeof DOMPurify(window).version, 'string');
      assert.strictEqual(typeof DOMPurify(window).sanitize, 'function');
    });
    // Test to prevent security issues with pre-clobbered DOM
    QUnit.test(
      'sanitize() should not throw if the original document is clobbered _after_ DOMPurify has been instantiated',
      function (assert) {
        var evilNode = document.createElement('div');
        evilNode.innerHTML =
          '<img id="implementation"><img id="createNodeIterator"><img id="importNode"><img id="createElement">';
        document.body.appendChild(evilNode);
        try {
          // tests implementation and createNodeIterator
          var resultPlain = DOMPurify.sanitize('123');
          // tests importNode
          var resultImport = DOMPurify.sanitize('123', {
            RETURN_DOM: true,
            ADD_ATTR: ['shadowroot'],
          });
          // tests createElement
          var resultBody = DOMPurify.sanitize('123<img id="body">');
        } finally {
          // clean up before doing the actual assertions, otherwise qunit/jquery/etc might blow up
          document.body.removeChild(evilNode);
        }
        assert.equal(resultPlain, '123');
        assert.equal(resultImport.ownerDocument, document);
        assert.equal(resultBody, '123<img>');
      }
    );
    // Tests to ensure that a configuration can be set and cleared
    QUnit.test(
      'ensure that a persistent configuration can be set and cleared',
      function (assert) {
        var dirty = '<foobar>abc</foobar>';
        assert.equal(DOMPurify.sanitize(dirty), 'abc');
        DOMPurify.setConfig({ ADD_TAGS: ['foobar'] });
        assert.equal(DOMPurify.sanitize(dirty), '<foobar>abc</foobar>');
        DOMPurify.clearConfig();
        assert.equal(DOMPurify.sanitize(dirty), 'abc');
      }
    );
    // Test to ensure that a hook can add allowed tags / attributes on the fly
    QUnit.test(
      'ensure that a hook can add allowed tags / attributes on the fly',
      function (assert) {
        DOMPurify.addHook('uponSanitizeElement', function (node, data) {
          if (
            node.nodeName &&
            node.nodeName.match(/^\w+-\w+$/) &&
            !data.allowedTags[data.tagName]
          ) {
            data.allowedTags[data.tagName] = true;
          }
        });
        DOMPurify.addHook('uponSanitizeAttribute', function (node, data) {
          if (
            data.attrName &&
            data.attrName.match(/^\w+-\w+$/) &&
            !data.allowedAttributes[data.attrName]
          ) {
            data.allowedAttributes[data.attrName] = true;
          }
        });
        var dirty =
          '<p>HE<iframe></iframe><is-custom onload="alert(1)" super-custom="test" />LLO</p>';
        var modified =
          '<p>HE<is-custom super-custom="test">LLO</is-custom></p>';
        assert.equal(DOMPurify.sanitize(dirty), modified);
        DOMPurify.removeHooks('uponSanitizeElement');
        DOMPurify.removeHooks('uponSanitizeAttribute');
      }
    );
    // Test to ensure that if input[type=file] is badlisted and flagged as an
    // attribute not to keep via hookEvent.keepAttr, it should be removed despite
    // it being an issue of being able to programmatically add it back in Safari.
    QUnit.test(
      'ensure that input[type=file] is removed via hookEvent keepAttr',
      function (assert) {
        DOMPurify.addHook('uponSanitizeAttribute', function (node, data) {
          if (
            node.nodeName == 'INPUT' &&
            node.getAttribute('type') &&
            node.getAttribute('type') == 'file'
          ) {
            data.keepAttr = false;
          }
        });
        var dirty = '<input type="file" />';
        var modified = '<input>';
        if (window.name == 'nodejs') {
          assert.equal(DOMPurify.sanitize(dirty), modified);
        } else {
          assert.expect(0);
        }
        DOMPurify.removeHooks('uponSanitizeAttribute');
      }
    );
    QUnit.test(
      'sanitize() should allow unknown protocols when ALLOW_UNKNOWN_PROTOCOLS is true',
      function (assert) {
        var dirty =
          '<div><a href="spotify:track:12345"><img src="cid:1234567"></a></div>';
        assert.equal(
          dirty,
          DOMPurify.sanitize(dirty, { ALLOW_UNKNOWN_PROTOCOLS: true })
        );
      }
    );

    QUnit.test(
      'sanitize() should not allow javascript when ALLOW_UNKNOWN_PROTOCOLS is true',
      function (assert) {
        var dirty =
          '<div><a href="javascript:alert(document.title)"><img src="cid:1234567"/></a></div>';
        var modified = '<div><a><img src="cid:1234567"></a></div>';
        assert.equal(
          modified,
          DOMPurify.sanitize(dirty, { ALLOW_UNKNOWN_PROTOCOLS: true })
        );
      }
    );

    QUnit.test(
      'Regression-Test to make sure #166 stays fixed',
      function (assert) {
        var dirty = '<p onFoo="123">HELLO</p>';
        var modified = '<p>HELLO</p>';
        assert.equal(
          modified,
          DOMPurify.sanitize(dirty, { ALLOW_UNKNOWN_PROTOCOLS: true })
        );
      }
    );

    // Test 1 to check if the element count in DOMPurify.removed is correct
    QUnit.test(
      'DOMPurify.removed should contain one element',
      function (assert) {
        var dirty =
          '<svg onload=alert(1)><filter><feGaussianBlur /></filter></svg>';
        DOMPurify.sanitize(dirty);
        assert.contains(DOMPurify.removed.length, [1, 2]); // IE removes two
      }
    );

    // Test 2 to check if the element count in DOMPurify.removed is correct
    QUnit.test(
      'DOMPurify.removed should contain two elements',
      function (assert) {
        var dirty =
          '1<script>alert(1)</script><svg onload=alert(1)><filter><feGaussianBlur /></filter></svg>';
        DOMPurify.sanitize(dirty);
        assert.contains(DOMPurify.removed.length, [2, 3]); // IE removed three
      }
    );

    // Test 3 to check if the element count in DOMPurify.removed is correct
    QUnit.test('DOMPurify.removed should be correct', function (assert) {
      var dirty = '<img src=x onerror="alert(1)">';
      DOMPurify.sanitize(dirty);
      assert.equal(DOMPurify.removed.length, 1);
    });

    // Test 4 to check that DOMPurify.removed is correct in SAFE_FOR_TEMLATES mode
    QUnit.test(
      'DOMPurify.removed should be correct in SAFE_FOR_TEMPLATES mode',
      function (assert) {
        var dirty = '<a>123{{456}}</a>';
        DOMPurify.sanitize(dirty, {
          WHOLE_DOCUMENT: true,
          SAFE_FOR_TEMPLATES: true,
        });
        assert.equal(DOMPurify.removed.length, 1);
      }
    );

    // Test 5 to check that DOMPurify.removed is correct in SAFE_FOR_TEMLATES mode
    QUnit.test(
      'DOMPurify.removed should be correct in SAFE_FOR_TEMPLATES mode',
      function (assert) {
        var dirty = '<a>123{{456}}<b>456{{789}}</b></a>';
        DOMPurify.sanitize(dirty, {
          WHOLE_DOCUMENT: true,
          SAFE_FOR_TEMPLATES: true,
        });
        assert.equal(DOMPurify.removed.length, 2);
      }
    );

    // Test 6 to check that DOMPurify.removed is correct in SAFE_FOR_TEMLATES mode
    QUnit.test(
      'DOMPurify.removed should be correct in SAFE_FOR_TEMPLATES mode',
      function (assert) {
        var dirty = '<img src=1 width="{{123}}">';
        DOMPurify.sanitize(dirty, {
          WHOLE_DOCUMENT: true,
          SAFE_FOR_TEMPLATES: true,
        });
        assert.equal(DOMPurify.removed.length, 1);
      }
    );

    // Test 7 to check that DOMPurify.removed is correct
    QUnit.test('DOMPurify.removed should be correct', function (assert) {
      var dirty = '<option><iframe></select><b><script>alert(1)</script>';
      DOMPurify.sanitize(dirty);
      assert.equal(DOMPurify.removed.length, 1);
    });

    // Test 8 to check that DOMPurify.removed is correct if tags are clean
    QUnit.test(
      'DOMPurify.removed should not contain elements if tags are permitted',
      function (assert) {
        var dirty = '<a>123</a>';
        DOMPurify.sanitize(dirty);
        assert.equal(DOMPurify.removed.length, 0);
      }
    );

    // Test 9 to check that DOMPurify.removed is correct if the tags and attributes are clean
    QUnit.test(
      'DOMPurify.removed should not contain elements if all tags and attrs are permitted',
      function (assert) {
        var dirty = '<img src=x>';
        DOMPurify.sanitize(dirty);
        assert.equal(DOMPurify.removed.length, 0);
      }
    );

    // Test 10 to check that DOMPurify.removed does not have false positive elements in SAFE_FOR_TEMLATES mode
    QUnit.test(
      'DOMPurify.removed should not contain elements for valid data in SAFE_FOR_TEMLATES mode',
      function (assert) {
        var dirty = '1';
        DOMPurify.sanitize(dirty, {
          WHOLE_DOCUMENT: true,
          SAFE_FOR_TEMPLATES: true,
        });
        assert.equal(DOMPurify.removed.length, 0);
      }
    );

    // Test 11 to check that DOMPurify.removed does not have false positive elements
    QUnit.test(
      'DOMPurify.removed should not contain elements for valid data',
      function (assert) {
        var dirty = '1';
        DOMPurify.sanitize(dirty, {
          WHOLE_DOCUMENT: true,
        });
        assert.equal(DOMPurify.removed.length, 0);
      }
    );
    // Tests to make sure that the node scanning feature delivers accurate results on all browsers
    QUnit.test(
      'DOMPurify should deliver accurate results when sanitizing nodes 1',
      function (assert) {
        var clean = DOMPurify.sanitize(document.createElement('td'));
        assert.equal(clean, '<td></td>');
      }
    );
    QUnit.test(
      'DOMPurify should deliver accurate results when sanitizing nodes 2',
      function (assert) {
        var clean = DOMPurify.sanitize(document.createElement('td'), {
          RETURN_DOM: true,
        });
        assert.equal(clean.outerHTML, '<body><td></td></body>');
      }
    );
    // Test to make sure that URI_safe attributes can be configured too
    QUnit.test(
      'DOMPurify should allow to define URI safe attributes',
      function (assert) {
        var clean = DOMPurify.sanitize('<b typeof="bla:h">123</b>', {
          ALLOWED_ATTR: ['typeof'],
          ADD_URI_SAFE_ATTR: ['typeof'],
        });
        assert.equal(clean, '<b typeof="bla:h">123</b>');
      }
    );
    // Test to make sure that URI_safe attributes don't persist, see #327
    QUnit.test(
      'DOMPurify should not persist URI safe attributes',
      function (assert) {
        var clean = DOMPurify.sanitize('<b typeof="bla:h">123</b>', {
          ALLOWED_ATTR: ['typeof'],
          ADD_URI_SAFE_ATTR: ['typeof'],
        });
        var clean = DOMPurify.sanitize('<b typeof="bla:h">123</b>', {
          ALLOWED_ATTR: ['typeof'],
        });
        assert.equal(clean, '<b>123</b>');
      }
    );
    // Test to make sure that URI_safe attributes don't overwrite default, see #366
    QUnit.test(
      'DOMPurify should not overwrite default URI safe attributes',
      function (assert) {
        var clean = DOMPurify.sanitize(
          '<div poster="x:y" style="color: red">Test</div>',
          { ADD_URI_SAFE_ATTR: ['poster'] }
        );
        assert.contains(clean, [
          '<div style="color: red" poster="x:y">Test</div>',
          '<div style="color: red;" poster="x:y">Test</div>',
        ]);

        clean = DOMPurify.sanitize(
          '<div poster="x:y" style="color: red">Test</div>'
        );
        assert.contains(clean, [
          '<div style="color: red">Test</div>',
          '<div style="color: red;">Test</div>',
        ]);
      }
    );
    // Tests to make sure that FORCE_BODY pushes elements to document.body (#199)
    QUnit.test(
      'FORCE_BODY needs to push some elements to document.body',
      function (assert) {
        var clean = DOMPurify.sanitize('<style>123</style>', {
          FORCE_BODY: true,
        });
        assert.equal(clean, '<style>123</style>');
      }
    );
    QUnit.test(
      'FORCE_BODY needs to push some elements to document.body',
      function (assert) {
        var clean = DOMPurify.sanitize('<script>123</script>', {
          FORCE_BODY: true,
          ADD_TAGS: ['script'],
        });
        assert.equal(clean, '<script>123</script>');
      }
    );
    QUnit.test(
      'FORCE_BODY needs to push some elements to document.body',
      function (assert) {
        var clean = DOMPurify.sanitize(' AAAAA', { FORCE_BODY: true });
        assert.equal(clean, ' AAAAA');
      }
    );
    QUnit.test(
      'Lack of FORCE_BODY still preserves leading whitespace',
      function (assert) {
        var clean = DOMPurify.sanitize(' <b>AAAAA</b>', { FORCE_BODY: false });
        assert.equal(clean, ' <b>AAAAA</b>');
      }
    );
    QUnit.test(
      'Lack of FORCE_BODY needs to push some elements to document.head',
      function (assert) {
        var clean = DOMPurify.sanitize('<style>123</style>', {
          FORCE_BODY: false,
        });
        assert.equal(clean, '');
      }
    );
    // Test to make sure that ALLOW_ARIA_ATTR is working as expected (#198)
    QUnit.test('Config-Flag tests: ALLOW_ARIA_ATTR', function (assert) {
      assert.contains(
        DOMPurify.sanitize('<a aria-abc="foo" href="#">abc</a>', {
          ALLOW_ARIA_ATTR: true,
        }),
        [
          '<a aria-abc="foo" href="#">abc</a>',
          '<a href="#" aria-abc="foo">abc</a>',
        ]
      );
      assert.equal(
        DOMPurify.sanitize('<a href="#" aria-aöü="foo">abc</a>', {
          ALLOW_ARIA_ATTR: true,
        }),
        '<a href="#">abc</a>'
      );
      assert.equal(
        DOMPurify.sanitize('<a href="#" aria-abc="foo">abc</a>', {
          ALLOW_ARIA_ATTR: false,
        }),
        '<a href="#">abc</a>'
      );
      assert.equal(
        DOMPurify.sanitize('<a href="#" aria-äöü="foo">abc</a>', {
          ALLOW_ARIA_ATTR: false,
        }),
        '<a href="#">abc</a>'
      );
    });
    QUnit.test('Config-Flag tests: USE_PROFILES', function (assert) {
      assert.equal(
        DOMPurify.sanitize('<h1>HELLO</h1>', { USE_PROFILES: { html: false } }),
        'HELLO'
      );
      assert.equal(
        DOMPurify.sanitize('<h1>HELLO</h1>', { USE_PROFILES: { html: true } }),
        '<h1>HELLO</h1>'
      );
      assert.contains(
        DOMPurify.sanitize('<h1>HELLO</h1><math></math>', {
          USE_PROFILES: { html: true, mathMl: true },
        }),
        [
          '<h1>HELLO</h1>',
          '<h1>HELLO</h1><math></math>',
          '<h1>HELLO</h1><math></math>',
        ]
      );
      assert.contains(
        DOMPurify.sanitize('<h1>HELLO</h1><math><mi></mi></math>', {
          USE_PROFILES: { html: true, mathMl: true },
        }),
        [
          '<h1>HELLO</h1>',
          '<h1>HELLO</h1><math><mi></mi></math>',
          '<h1>HELLO</h1><math></math>',
        ]
      );
      assert.contains(
        DOMPurify.sanitize('<h1>HELLO</h1><math><mi></mi></math>', {
          USE_PROFILES: { html: true, mathMl: true },
          FORBID_TAGS: ['mi'],
        }),
        [
          '<h1>HELLO</h1>',
          '<h1>HELLO</h1><math></math>',
          '<h1>HELLO</h1><math></math>',
        ]
      );
      assert.contains(
        DOMPurify.sanitize('<h1>HELLO</h1><math class="foo"><mi></mi></math>', {
          USE_PROFILES: { html: true, mathMl: true },
          FORBID_ATTR: ['class'],
        }),
        [
          '<h1>HELLO</h1>',
          '<h1>HELLO</h1><math><mi></mi></math>',
          '<h1>HELLO</h1><math></math>',
        ]
      );
      assert.equal(
        DOMPurify.sanitize('<h1>HELLO</h1>', { USE_PROFILES: { bogus: true } }),
        'HELLO'
      );
      assert.equal(
        DOMPurify.sanitize('<h1>HELLO</h1>', { USE_PROFILES: 123 }),
        'HELLO'
      );
      assert.equal(
        DOMPurify.sanitize('<h1>HELLO</h1>', { USE_PROFILES: [] }),
        'HELLO'
      );
      assert.contains(
        DOMPurify.sanitize('<svg><rect height="50"></rect></svg>', {
          USE_PROFILES: { svg: true },
        }),
        [
          '',
          '<svg><rect height="50"></rect></svg>',
          '<svg xmlns="http://www.w3.org/2000/svg"><rect height="50" /></svg>',
          '<svg xmlns="http://www.w3.org/2000/svg" />',
        ]
      );
      assert.contains(
        DOMPurify.sanitize(
          '<svg><feBlend in="SourceGraphic" mode="multiply" /></svg>',
          {
            USE_PROFILES: { svgFilters: true },
            ADD_TAGS: ['svg'],
          }
        ),
        [
          '<svg><feblend in="SourceGraphic" mode="multiply"></feblend></svg>',
          '<svg><feblend mode="multiply" in="SourceGraphic"></feblend></svg>',
          '<svg><feBlend mode="multiply" in="SourceGraphic"></feBlend></svg>',
          '<svg><feBlend mode="multiply" in="SourceGraphic"></feBlend></svg>',
          '<svg xmlns="http://www.w3.org/2000/svg"><feBlend in="SourceGraphic" mode="multiply" /></svg>',
          '<svg xmlns="http://www.w3.org/2000/svg" />',
        ]
      );
      assert.contains(
        DOMPurify.sanitize(
          '<svg><style>.some-class {fill: #fff}</style></svg>',
          {
            USE_PROFILES: { svg: true },
          }
        ),
        [
          '',
          '<svg><style>.some-class {fill: #fff}</style></svg>',
          '<svg xmlns="http://www.w3.org/2000/svg"><style>.some-class {fill: #fff}</style></svg>',
          '<svg xmlns="http://www.w3.org/2000/svg" />',
        ]
      );
      assert.contains(
        DOMPurify.sanitize('<svg><text>SEE ME</text></svg>', {
          USE_PROFILES: { svg: true },
          KEEP_CONTENT: false,
        }),
        [
          '',
          '<svg><text>SEE ME</text></svg>',
          '<svg xmlns="http://www.w3.org/2000/svg"><text>SEE ME</text></svg>',
          '<svg xmlns="http://www.w3.org/2000/svg" />',
        ]
      );
      assert.equal(
        DOMPurify.sanitize('<span>SEE ME</span>', {
          USE_PROFILES: { html: true },
          KEEP_CONTENT: false,
        }),
        '<span>SEE ME</span>'
      );
      assert.equal(
        DOMPurify.sanitize('<div></div>', {
          USE_PROFILES: { svg: true },
          ADD_TAGS: ['div'],
        }),
        '<div></div>'
      );
      assert.contains(
        DOMPurify.sanitize('<svg keep="me"></svg>', {
          USE_PROFILES: { svg: true },
          ADD_ATTR: ['keep'],
        }),
        [
          '',
          '<svg keep="me"></svg>',
          '<svg xmlns="http://www.w3.org/2000/svg" keep="me" />',
        ]
      );
    });
    QUnit.test('Config-Flag tests: ALLOWED_URI_REGEXP', function (assert) {
      var tests = [
        {
          test: '<img src="https://i.imgur.com/hkfpOUu.gifv">',
          expected: '<img src="https://i.imgur.com/hkfpOUu.gifv">',
        },
        {
          test: '<img src="http://i.imgur.com/WScAnHr.jpg">',
          expected: '<img src="http://i.imgur.com/WScAnHr.jpg">',
        },
        {
          test:
            '<img src="blob:https://localhost:3000/c4ea3ec6-9f22-4d08-af6f-d79e78a0a7a7">',
          expected: '<img>',
        },
        {
          test: '<a href="mailto:demo@example.com">demo</a>',
          expected: '<a>demo</a>',
        },
      ];
      tests.forEach(function (test) {
        var str = DOMPurify.sanitize(test.test, {
          ALLOWED_URI_REGEXP: /^(?:(?:(?:f|ht)tps?):|[^a-z]|[a-z+.\-]+(?:[^a-z+.\-:]|$))/i,
        });
        assert.equal(str, test.expected);
      });
    });
    QUnit.test('Ensure ALLOWED_URI_REGEXP is not cached', function(assert) {
      const 
        dirty = '<img src="https://different.com">',
        expected = '<img src="https://different.com">';

      assert.equal(DOMPurify.sanitize(dirty), expected);

      // sanitize with a custom URI regexp
      assert.equal(DOMPurify.sanitize('<img src="https://test.com">', {
        ALLOWED_URI_REGEXP: /test\.com/i
      }), '<img src="https://test.com">');

      // ensure that the previous regexp does not affect future sanitize calls
      assert.equal(DOMPurify.sanitize(dirty), expected);
    });
    QUnit.test(
      'Avoid freeze when using tables and ALLOW_TAGS',
      function (assert) {
        var clean = DOMPurify.sanitize('<table><tr><td></td></tr></table>', {
          ALLOW_TAGS: ['table', 'tr', 'td'],
        });
        assert.equal(clean, '<table><tbody><tr><td></td></tr></tbody></table>');
      }
    );
    QUnit.test(
      'Avoid XSS with ALLOW_TAGS permitting noembed, noscript',
      function (assert) {
        var clean = DOMPurify.sanitize(
          "a<noembed><p id='</noembed><img src=x onerror=alert(1)>'></p></noembed>",
          { ADD_TAGS: ['noembed'] }
        );
        assert.contains(clean, [
          'a<noembed><p id=\'</noembed><img src="x">\'&gt;<p></p>',
          'a',
          'a<noembed>&lt;p id=\'</noembed><img src="x">\'&gt;<p></p>',
          'a<noembed><p id="&lt;/noembed&gt;&lt;img src=x onerror=alert(1)&gt;"></p></noembed>',
          'a<noembed></noembed>',
          'a<img src="x">\'&gt;<p></p>',
        ]);
      }
    );
    QUnit.test(
      'Avoid mXSS in Chrome 77 and above using SVG',
      function (assert) {
        var clean = DOMPurify.sanitize('<svg></p><style><g title="</style>');
        assert.contains(clean, [
          '',
          '<svg></svg><p></p><style><g title="</style>',
          '<p></p><style><g title="</style>',
          '<svg></svg><p></p>',
          '<svg><style></style></svg>',
          '<svg xmlns="http://www.w3.org/2000/svg"><style /></svg>',
          '<svg xmlns="http://www.w3.org/2000/svg"><style /></svg></svg>',
        ]);
      }
    );
    QUnit.test(
      'Avoid mXSS in Chrome 77 and above using HTML',
      function (assert) {
        var clean = DOMPurify.sanitize('<svg></p><title><a href="</title>qqq');
        assert.contains(clean, [
          '',
          '<svg></svg><p></p><title>&lt;a href="</title>qqq<img src="">"&gt;',
          '<svg></svg><p></p><title>&lt;a href="</title>qqq',
          '<p></p><title>&lt;a href="</title>qqq',
          '<svg></svg><p></p>qqq',
          '<svg><title></title></svg>',
          '<svg xmlns="http://www.w3.org/2000/svg"><title /></svg>',
          '<svg xmlns="http://www.w3.org/2000/svg"><title /></svg></svg>',
        ]);
      }
    );
    QUnit.test(
      'Test for correct return value when RETURN_TRUSTED_TYPE is true',
      function (assert) {
        var clean = DOMPurify.sanitize('<b>hello goodbye</b>', {
          RETURN_TRUSTED_TYPE: true,
        });
        var type = typeof clean;
        assert.contains(type, ['TrustedHTML', 'string', 'object']);
      }
    );
    QUnit.test(
      'Test for correct return value when RETURN_TRUSTED_TYPE is false',
      function (assert) {
        var clean = DOMPurify.sanitize('<b>hello goodbye</b>', {
          RETURN_TRUSTED_TYPE: false,
        });
        var type = typeof clean;
        assert.equal(type, 'string');
      }
    );
    QUnit.test(
      'Test for correct return value when RETURN_TRUSTED_TYPE is not set',
      function (assert) {
        var clean = DOMPurify.sanitize('<b>hello goodbye</b>');
        var type = typeof clean;
        assert.equal(type, 'string');
      }
    );
    QUnit.test(
      'Test for DoS coming from table sanitization 1/2 See #365',
      function (assert) {
        var config = { FORBID_TAGS: ['tbody'] };
        var clean = DOMPurify.sanitize(
          '<table><tbody><tr><td>test</td></tr></tbody></table>',
          config
        );
        assert.equal(
          clean,
          '<table><tbody><tr><td>test</td></tr></tbody></table>'
        );
      }
    );
    QUnit.test(
      'Test for DoS coming from table sanitization 2/2 See #365',
      function (assert) {
        var config = {
          ALLOWED_TAGS: [
            'b',
            'strong',
            'i',
            'italic',
            'div',
            'p',
            'span',
            'ul',
            'li',
            'ol',
            'a',
            'img',
            'br',
            'tr',
            'td',
            'th',
            'table',
            'h1',
            'h2',
            'h3',
            'h4',
            'h5',
            'h6',
          ],
          ALLOW_DATA_ATTR: false,
          ALLOWED_ATTR: ['src', 'class', 'target', 'href'],
        };
        var clean = DOMPurify.sanitize(
          '<table><colgroup><col></col></colgroup><tbody><tr><td >test</td></tr></tbody></table>',
          config
        );
        assert.equal(
          clean,
          '<table><tbody><tr><td>test</td></tr></tbody></table>'
        );
      }
    );
    QUnit.test(
      'Test for less aggressive mXSS handling, See #369',
      function (assert) {
        var config = {
          FORBID_TAGS: ['svg', 'math'],
        };
        var clean = DOMPurify.sanitize(
          '<b data-test="<span>content</span>"></b>',
          config
        );
        assert.contains(clean, [
          '<b data-test="<span>content</span>"></b>',
          '<b data-test="&lt;span&gt;content&lt;/span&gt;"></b>',
        ]);
      }
    );
    QUnit.test(
      'Test against mXSS using text integration points and removal 1/2',
      function (assert) {
        var config = {
          FORBID_TAGS: ['mi'],
        };
        var clean = DOMPurify.sanitize(
          '<math><mi><b><style><b title="</style><iframe onload&#x3d;alert(1)<!--"></style>',
          config
        );
        assert.contains(clean, [
          '<math><b><style><b title="</style></b></math>',
          '<math></math>',
          '',
        ]);
      }
    );
    QUnit.test(
      'Test against mXSS using text integration points and removal 2/2',
      function (assert) {
        var config = {
          ADD_TAGS: ['xmp'],
        };
        var clean = DOMPurify.sanitize(
          "x<noframes><svg><b><xmp><b title='</xmp><img>",
          config
        );
        assert.contains(clean, ['x']);
      }
    );
    QUnit.test(
      'Test against insecure behavior in jQUery v3.0 and newer 1/2',
      function (assert) {
        var config = {};
        var clean = DOMPurify.sanitize(
          '<img x="/><img src=x onerror=alert(1)>" y="<x">',
          config
        );
        assert.contains(clean, [
          '<img y="<x" x="/><img src=x onerror=alert(1)>">', // jsdom
          '<img y="<x">',
          '<img y="&lt;x">',
          '<img y="<x">',
        ]);
      }
    );
    QUnit.test(
      'Test against insecure behavior in jQUery v3.0 and newer 2/2',
      function (assert) {
        var config = {};
        var clean = DOMPurify.sanitize(
          "a<noscript><p id='><noscript /><img src=x onerror=alert(1)>'></noscript>",
          config
        );
        assert.contains(clean, [
          "a<noscript>&lt;p id='>&lt;noscript />&lt;img src=x onerror=alert(1)>'></noscript>", // jsdom
          'a<noscript><p></p></noscript>',
          'a<p></p>',
          'a',
        ]);
      }
    );
    QUnit.test(
      'Test against data URIs in anchors without proper config flag',
      function (assert) {
        var clean = DOMPurify.sanitize(
          '<a href="data:image/gif;base64,123">icon.gif</a>'
        );
        assert.equal(clean, '<a>icon.gif</a>');
      }
    );
    QUnit.test(
      'Test against data URIs in anchors using proper config flag',
      function (assert) {
        var clean = DOMPurify.sanitize(
          '<a href="data:image/gif;base64,123">icon.gif</a>',
          {
            ADD_DATA_URI_TAGS: ['a', 'b'],
          }
        );
        assert.equal(clean, '<a href="data:image/gif;base64,123">icon.gif</a>');
      }
    );
    QUnit.test(
      'Test against Unicode tag names and proper removal',
      function (assert) {
        var clean = DOMPurify.sanitize('<svg><blocKquote>foo</blocKquote>');
        assert.contains(clean, [
          '<svg></svg>',
          '<svg xmlns="http://www.w3.org/2000/svg" />',
        ]);

        var clean = DOMPurify.sanitize('<svg><blocKquote>foo</blocKquote>');
        assert.contains(clean, [
          '<svg></svg><blockquote>foo</blockquote>',
          '<svg><blockquote>foo</blockquote></svg>',
          '<svg xmlns="http://www.w3.org/2000/svg" /><blockquote>foo</blockquote>',
        ]);
      }
    );
    QUnit.test('Test if namespaces are properly enforced', function (assert) {
      var tests = [
        {
          test:
            '<svg><desc><canvas></canvas><textarea></textarea></desc></svg>',
          expected: [
            '<svg><desc></desc></svg>',
            '<svg xmlns="http://www.w3.org/2000/svg"><desc></desc></svg>',
            '<svg xmlns="http://www.w3.org/2000/svg" />',
          ],
        },
        {
          test: '<svg><canvas></canvas><textarea></textarea></svg>',
          expected: [
            '<svg></svg>',
            '<svg xmlns="http://www.w3.org/2000/svg" />',
          ],
        },
        {
          test: '<math><canvas></canvas><textarea></textarea></math>',
          expected: ['<math></math>'],
        },
        {
          test: '<math><mi><canvas></canvas><textarea></textarea></mi></math>',
          expected: [
            '<math><mi><canvas></canvas><textarea></textarea></mi></math>',
            '<math></math>',
          ],
        },
        {
          test: '<svg><math></math><title><math></math></title></svg>',
          expected: [
            '<svg><title></title></svg>',
            '<svg xmlns="http://www.w3.org/2000/svg" />',
            '<svg xmlns="http://www.w3.org/2000/svg"><title></title></svg>',
          ],
        },
        {
          test: '<math><svg></svg><mi><svg></svg></mi></math>',
          expected: [
            '<math><mi><svg></svg></mi></math>',
            '<math><mi><svg xmlns="http://www.w3.org/2000/svg" /></mi></math>',
            '<math></math>',
          ],
        },
        {
          test: '<form><math><mi><mglyph></form><form>',
          expected: [
            '<form><math><mi><mglyph></mglyph></mi></math></form>',
            '<form><math></math></form>',
          ],
        },
      ];
      tests.forEach(function (test) {
        var clean = DOMPurify.sanitize(test.test);
        assert.contains(clean, test.expected);
      });
    });
    QUnit.test('Config-Flag tests: NAMESPACE', function (assert) {
      var tests = [
        {
          test: '<polyline points="0 0"></polyline>',
          config: { NAMESPACE: 'http://www.w3.org/2000/svg' },
          expected: [
            '<polyline points="0 0"></polyline>',
            '<polyline xmlns="http://www.w3.org/2000/svg" points="0 0"/>',
            '<polyline xmlns="http://www.w3.org/2000/svg" points="0,0" />',
            '',
          ],
        },
        {
          test: '<polyline points="0 0"></polyline>',
          config: { NAMESPACE: 'http://www.w3.org/1999/xhtml' },
          expected: [''],
        },
        {
          test: '<mi></mi>',
          config: { NAMESPACE: 'http://www.w3.org/1998/Math/MathML' },
          expected: [
            '<mi></mi>',
            '<mi xmlns="http://www.w3.org/1998/Math/MathML"></mi>',
            '<mi xmlns="http://www.w3.org/1998/Math/MathML"/>',
            '<mi xmlns="http://www.w3.org/1998/Math/MathML" />',
            '',
          ],
        },
        {
          test: '<polyline points="0 0"></polyline>',
          config: { NAMESPACE: 'http://www.w3.org/1998/Math/MathML' },
          expected: [''],
        },
        {
          test: '<mi></mi>',
          config: { NAMESPACE: 'http://www.w3.org/1999/xhtml' },
          expected: [''],
        },
      ];
      tests.forEach(function (test) {
        var clean = DOMPurify.sanitize(test.test, test.config);
        assert.contains(clean, test.expected);
      });
    });
    QUnit.test('Config-Flag tests: ALLOWED_NAMESPACES', function (assert) {
      const tests = [
        // Test when ALLOWED_NAMESPACES is not set, result is empty for XML with custom namespace
        {
          test:
            '<library xmlns="http://www.ibm.com/library"><name>Library 1</name></library>',
          config: {
            ALLOWED_TAGS: ['#text', 'library', 'name'],
            KEEP_CONTENT: false,
            PARSER_MEDIA_TYPE: 'application/xhtml+xml',
          },
          expected: '',
        },
        // Test with one custom namespace at the root (ie. all sub-nodes will inherit that namespace)
        {
          test:
            '<library xmlns="http://www.ibm.com/library"><name>Library 1</name><dirty onload="alert()" /></library>',
          config: {
            ALLOWED_NAMESPACES: ['http://www.ibm.com/library'],
            ALLOWED_TAGS: ['#text', 'library', 'name'],
            KEEP_CONTENT: false,
            PARSER_MEDIA_TYPE: 'application/xhtml+xml',
          },
          expected:
            '<library xmlns="http://www.ibm.com/library"><name>Library 1</name></library>',
        },
        // Test with one custom namespace at sub-node (root will default to HTML_NAMESPACE and should be kept)
        {
          test:
            '<city><library xmlns="http://www.ibm.com/library"><name>Library 1</name><dirty onload="alert()" /></library></city>',
          config: {
            ALLOWED_NAMESPACES: ['http://www.w3.org/1999/xhtml', 'http://www.ibm.com/library'],
            ALLOWED_TAGS: ['#text', 'city', 'library', 'name'],
            KEEP_CONTENT: false,
            PARSER_MEDIA_TYPE: 'application/xhtml+xml',
          },
          expected:
            '<city xmlns="http://www.w3.org/1999/xhtml"><library xmlns="http://www.ibm.com/library"><name>Library 1</name></library></city>',
        },
        // Test removal of namespaces not listed in ALLOWED_NAMESPACES when input has multiple namespaces
        {
          test:
            '<library xmlns="http://www.ibm.com/library" xmlns:bk="urn:loc.gov:books"><bk:name>Library 1</bk:name><dirty onload="alert()" /></library>',
          config: {
            ALLOWED_NAMESPACES: ['http://www.ibm.com/library'],
            ALLOWED_TAGS: ['library', 'bk:name'],
            KEEP_CONTENT: false,
            PARSER_MEDIA_TYPE: 'application/xhtml+xml',
          },
          expected: ['<library xmlns="http://www.ibm.com/library"/>', '<library xmlns="http://www.ibm.com/library" />']
        },
        // Test with multiple custom namespaces and prefixes in input
        {
          test:
            '<library xmlns="http://www.ibm.com/library" xmlns:bk="urn:loc.gov:books" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata"><bk:name>Library 1<m:properties>Other Properties</m:properties></bk:name><dirty onload="alert()" /></library>',
          config: {
            ALLOWED_NAMESPACES: [
              'http://www.ibm.com/library',
              'urn:loc.gov:books',
              'http://schemas.microsoft.com/ado/2007/08/dataservices/metadata',
            ],
            ALLOWED_TAGS: ['#text', 'library', 'bk:name', 'm:properties'],
            KEEP_CONTENT: false,
            PARSER_MEDIA_TYPE: 'application/xhtml+xml',
          },
          expected:
            '<library xmlns="http://www.ibm.com/library"><bk:name xmlns:bk="urn:loc.gov:books">Library 1<m:properties xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata">Other Properties</m:properties></bk:name></library>',
        },
        // Test removal of elements mentioned in FORBID_TAGS even if their namespaces are allow-listed
        {
          test:
            '<library xmlns="http://www.ibm.com/library" xmlns:bk="urn:loc.gov:books" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata"><bk:name>Library 1<m:properties>Other Properties</m:properties></bk:name><dirty onload="alert()" /></library>',
          config: {
            ADD_TAGS: ['library', 'bk:name'],
            ALLOWED_NAMESPACES: [
              'http://www.ibm.com/library',
              'urn:loc.gov:books',
              'http://schemas.microsoft.com/ado/2007/08/dataservices/metadata',
            ],
            FORBID_TAGS: ['m:properties'],
            KEEP_CONTENT: false,
            PARSER_MEDIA_TYPE: 'application/xhtml+xml',
          },
          expected:
            '<library xmlns="http://www.ibm.com/library"><bk:name xmlns:bk="urn:loc.gov:books">Library 1</bk:name></library>',
        },
      ];
      tests.forEach(function (test) {
        assert.contains(DOMPurify.sanitize(test.test, test.config), test.expected);
      });
    });
    QUnit.test('Config-Flag tests: PARSER_MEDIA_TYPE', function (assert) {
      const tests = [
        {
          test: '<A href="#">invalid</A><a TITLE="title" href="#">valid</a>',
          expected: {
            '': [
              '<a href="#">invalid</a><a href="#" title="title">valid</a>',
              '<a href="#">invalid</a><a title="title" href="#">valid</a>',
            ],
            'Application/xhtml+xml': [
              '<a href="#">invalid</a><a href="#" title="title">valid</a>',
              '<a href="#">invalid</a><a title="title" href="#">valid</a>',
            ],
            'application/xml': [
              '<a href="#">invalid</a><a href="#" title="title">valid</a>',
              '<a href="#">invalid</a><a title="title" href="#">valid</a>',
            ],
            'application/xhtml+xml': [
              '<a href="#">invalid</a><a href="#" title="title">valid</a>',
              'invalid<a xmlns="http://www.w3.org/1999/xhtml" href="#">valid</a>',
              'invalid<a xmlns="http://www.w3.org/1999/xhtml" href="#" TITLE="title">valid</a>',
            ],
            'text/html': [
              '<a href="#">invalid</a><a href="#" title="title">valid</a>',
              '<a href="#">invalid</a><a title="title" href="#">valid</a>',
            ],
            'text/xml': [
              '<a href="#">invalid</a><a href="#" title="title">valid</a>',
              '<a href="#">invalid</a><a title="title" href="#">valid</a>',
            ],
          },
        },
        {
          config: {
            WHOLE_DOCUMENT: true,
          },
          test: '<A href="#">invalid</A><a TITLE="title" href="#">valid</a>',
          expected: {
            'text/html': [
              '<html><head></head><body><a href="#">invalid</a><a href="#" title="title">valid</a></body></html>',
              '<html><head></head><body><a href="#">invalid</a><a title="title" href="#">valid</a></body></html>',
            ],
            'application/xhtml+xml': [
              '<html xmlns="http://www.w3.org/1999/xhtml"><head></head><body>invalid<a href="#">valid</a></body></html>',
              '<html xmlns="http://www.w3.org/1999/xhtml"><head /><body>invalid<a href="#">valid</a></body></html>',
              '<html xmlns="http://www.w3.org/1999/xhtml"><head></head><body>invalid<a href="#" TITLE="title">valid</a></body></html>',
            ],
          },
        },
      ];
      tests.forEach(function (test) {
        Object.keys(test.expected).forEach(function (type) {
          var config = test.config || {};
          config.PARSER_MEDIA_TYPE = type;
          var clean = DOMPurify.sanitize(test.test, config);
          assert.contains(clean, test.expected[type]);
        });
      });
    });

    QUnit.test(
      'Config-Flag tests: PARSER_MEDIA_TYPE + ALLOWED_TAGS/ALLOWED_ATTR',
      function (assert) {
        assert.contains(
          DOMPurify.sanitize(
            '<a href="#">abc</a><CustomTag customattr="bar" CustomAttr="foo"/>',
            {
              PARSER_MEDIA_TYPE: 'application/xhtml+xml',
              ALLOWED_TAGS: ['a', 'CustomTag'],
              ALLOWED_ATTR: ['href', 'CustomAttr'],
            }
          ),
          [
            '<a xmlns="http://www.w3.org/1999/xhtml" href="#">abc</a>' +
              '<CustomTag xmlns="http://www.w3.org/1999/xhtml" CustomAttr="foo"></CustomTag>',
            '<a xmlns="http://www.w3.org/1999/xhtml" href="#">abc</a><CustomTag xmlns="http://www.w3.org/1999/xhtml" CustomAttr="foo" customattr="foo"></CustomTag>',
          ]
        );
      }
    );

    QUnit.test('Test invalid xml', function (assert) {
      var tests = [
        {
          test: '',
          config: { NAMESPACE: 'http://www.w3.org/2000/svg' },
          expected: [''],
        },
        {
          test: '<!-->',
          config: { NAMESPACE: 'http://www.w3.org/2000/svg' },
          expected: ['', '<!-->'],
        },
        {
          test: '',
          config: { NAMESPACE: 'http://www.w3.org/1998/Math/MathML' },
          expected: [''],
        },
        {
          test: '<!-->',
          config: { NAMESPACE: 'http://www.w3.org/1998/Math/MathML' },
          expected: ['', '<!-->'],
        },
        {
          test: '',
          config: { NAMESPACE: 'http://www.w3.org/1999/xhtml' },
          expected: [''],
        },
        {
          test: '',
          config: {},
          expected: [''],
        },
        {
          test: '<!-->',
          config: { NAMESPACE: 'http://www.w3.org/1999/xhtml' },
          expected: ['', '<!-->'],
        },
        {
          test: '<!-->',
          config: {},
          expected: ['', '<!-->'],
        },
      ];
      tests.forEach(function (test) {
        var clean = DOMPurify.sanitize(test.test, test.config);
        assert.contains(clean, test.expected);
      });
    });

    QUnit.test(
      'Test namespace default to html after other namespace been used',
      function (assert) {
        var tests = [
          {
            test: '<br>',
            config: { NAMESPACE: 'http://www.w3.org/2000/svg' },
            expected: ['', '<br>'],
          },
          {
            test: '<br>',
            config: {},
            expected: ['<br>'],
          },
        ];
        tests.forEach(function (test) {
          var clean = DOMPurify.sanitize(test.test, test.config);
          assert.contains(clean, test.expected);
        });
      }
    );

    QUnit.test('Test non-html input after empty input', function (assert) {
      var tests = [
        {
          test: '',
          config: { NAMESPACE: 'http://www.w3.org/2000/svg' },
          expected: [''],
        },
        {
          test: '<polyline points="0 0"></polyline>',
          config: { NAMESPACE: 'http://www.w3.org/2000/svg' },
          expected: [
            '<polyline points="0 0"></polyline>',
            '<polyline xmlns="http://www.w3.org/2000/svg" points="0 0"/>',
            '<polyline xmlns="http://www.w3.org/2000/svg" points="0,0" />',
            '',
          ],
        },
      ];
      tests.forEach(function (test) {
        var clean = DOMPurify.sanitize(test.test, test.config);
        assert.contains(clean, test.expected);
      });
    });

    QUnit.test('removeHook returns hook function', function (assert) {
      const entryPoint = 'afterSanitizeAttributes';
      const dirty = '<div class="hello"></div>';
      const expected = '<div class="world"></div>';

      DOMPurify.addHook(entryPoint, function (node) {
        return node.setAttribute('class', 'world');
      });
      assert.equal(DOMPurify.sanitize(dirty), expected);

      // remove hook and keep it
      const hookFunction = DOMPurify.removeHook(entryPoint);
      assert.equal(DOMPurify.sanitize(dirty), dirty);

      // set the same hook
      DOMPurify.addHook(entryPoint, hookFunction);
      assert.equal(DOMPurify.sanitize(dirty), expected);

      // cleanup hook
      DOMPurify.removeHook(entryPoint);
    });

    QUnit.test('removeHook allows specifying the hook to remove', function (assert) {
      const entryPoint = 'afterSanitizeAttributes';
      const dirty = '<div class="original"></div>';
      const expected = '<div class="original first third"></div>';

      const firstHook = function (node) {
        node.classList.add('first');
      };
      const secondHook = function (node) {
        node.classList.add('second');
      };
      const thirdHook = function (node) {
        node.classList.add('third');
      };

      DOMPurify.addHook(entryPoint, firstHook);
      DOMPurify.addHook(entryPoint, secondHook);
      DOMPurify.addHook(entryPoint, thirdHook);

      // removes the specified hook
      assert.strictEqual(DOMPurify.removeHook(entryPoint, secondHook), secondHook);

      // can’t remove it again
      assert.strictEqual(DOMPurify.removeHook(entryPoint, secondHook), undefined);

      // removed hook isn’t used during sanitize
      assert.strictEqual(DOMPurify.sanitize(dirty), expected);

      // cleanup hooks
      DOMPurify.removeHook(entryPoint, firstHook);
      DOMPurify.removeHook(entryPoint, thirdHook);
    });
    
    QUnit.test('Test proper removal of annotation-xml w. custom elements', function (assert) {
      const dirty  = '<svg><annotation-xml><foreignobject><style><!--</style><p id="--><img src=\'x\' onerror=\'alert(1)\'>">';
      const config = { 
        CUSTOM_ELEMENT_HANDLING: { tagNameCheck: /.*/ },
        FORBID_CONTENTS: [""] 
      };
      const expected = '<svg></svg>';
      let clean = DOMPurify.sanitize(dirty, config);
      assert.contains(clean, expected);
    });
    
    QUnit.test('Test proper handling of attributes with RETURN_DOM', function (assert) {
      const dirty  = '<body onload="alert(1)">&lt;a<!-- <f --></body>';
      const config = { 
        RETURN_DOM: true 
      };
      const expected = '<body>&lt;a</body>';
      let clean = DOMPurify.sanitize(dirty, config);
      
      let iframe = document.createElement('iframe')
      iframe.srcdoc = `<html><head></head>${clean.outerHTML}</html>`
      document.body.appendChild(iframe); // alert test
      assert.contains(clean.outerHTML, expected);
    });
    
    QUnit.test('Test proper handling of data-attribiutes in XML modes', function (assert) {
      const dirty  = '<svg width="800" height="600" xmlns="http://www.w3.org/2000/svg"><a xmlns:data-slonser="http://www.w3.org/1999/xlink" data-slonser:href="javascript:alert(1)"><text  x="20" y="35">Click me!</text></a></svg>';
      const config = { 
        PARSER_MEDIA_TYPE: 'application/xhtml+xml'
      };
      const expected = [
        '<svg xmlns=\"http://www.w3.org/2000/svg\" height=\"600\" width=\"800\"><a><text y=\"35\" x=\"20\">Click me!</text></a></svg>',
        '<svg height=\"600\" width=\"800\" xmlns=\"http://www.w3.org/2000/svg\"><a><text y=\"35\" x=\"20\">Click me!</text></a></svg>'
      ];
      let clean = DOMPurify.sanitize(dirty, config);
      assert.contains(clean, expected);
    });
  };
});