google3/third_party/java_src/junit/test/java/org/junit/tests/running/methods/TestMethodTest.java

package org.junit.tests.running.methods;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import java.util.Collections;
import java.util.List;

import junit.framework.JUnit4TestAdapter;
import junit.framework.TestResult;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Ignore;
import org.junit.Test;
import org.junit.runner.JUnitCore;
import org.junit.runner.Result;
import org.junit.runners.BlockJUnit4ClassRunner;
import org.junit.runners.model.InitializationError;

public class TestMethodTest {

    @SuppressWarnings("all")
    public static class EverythingWrong {
        private EverythingWrong() {
        }

        @BeforeClass
        public void notStaticBC() {
        }

        @BeforeClass
        static void notPublicBC() {
        }

        @BeforeClass
        public static int nonVoidBC() {
            return 0;
        }

        @BeforeClass
        public static void argumentsBC(int i) {
        }

        @BeforeClass
        public static void fineBC() {
        }

        @AfterClass
        public void notStaticAC() {
        }

        @AfterClass
        static void notPublicAC() {
        }

        @AfterClass
        public static int nonVoidAC() {
            return 0;
        }

        @AfterClass
        public static void argumentsAC(int i) {
        }

        @AfterClass
        public static void fineAC() {
        }

        @After
        public static void staticA() {
        }

        @After
        void notPublicA() {
        }

        @After
        public int nonVoidA() {
            return 0;
        }

        @After
        public void argumentsA(int i) {
        }

        @After
        public void fineA() {
        }

        @Before
        public static void staticB() {
        }

        @Before
        void notPublicB() {
        }

        @Before
        public int nonVoidB() {
            return 0;
        }

        @Before
        public void argumentsB(int i) {
        }

        @Before
        public void fineB() {
        }

        @Test
        public static void staticT() {
        }

        @Test
        void notPublicT() {
        }

        @Test
        public int nonVoidT() {
            return 0;
        }

        @Test
        public void argumentsT(int i) {
        }

        @Test
        public void fineT() {
        }
    }

    @Test
    public void testFailures() throws Exception {
        List<Throwable> problems = validateAllMethods(EverythingWrong.class);
        int errorCount = 1 + 4 * 5; // missing constructor plus four invalid methods for each annotation */
        assertEquals(errorCount, problems.size());
    }

    static public class SuperWrong {
        @Test
        void notPublic() {
        }
    }

    static public class SubWrong extends SuperWrong {
        @Test
        public void justFine() {
        }
    }

    @Test
    public void validateInheritedMethods() throws Exception {
        List<Throwable> problems = validateAllMethods(SubWrong.class);
        assertEquals(1, problems.size());
    }

    static public class SubShadows extends SuperWrong {
        @Override
        @Test
        public void notPublic() {
        }
    }

    @Test
    public void dontValidateShadowedMethods() throws Exception {
        List<Throwable> problems = validateAllMethods(SubShadows.class);
        assertTrue(problems.isEmpty());
    }

    private List<Throwable> validateAllMethods(Class<?> clazz) {
        try {
            new BlockJUnit4ClassRunner(clazz);
        } catch (InitializationError e) {
            return e.getCauses();
        }
        return Collections.emptyList();
    }

    static public class IgnoredTest {
        @Test
        public void valid() {
        }

        @Ignore
        @Test
        public void ignored() {
        }

        @Ignore("For testing purposes")
        @Test
        public void withReason() {
        }
    }

    @Test
    public void ignoreRunner() {
        JUnitCore runner = new JUnitCore();
        Result result = runner.run(IgnoredTest.class);
        assertEquals(2, result.getIgnoreCount());
        assertEquals(1, result.getRunCount());
    }

    @Test
    public void compatibility() {
        TestResult result = new TestResult();
        new JUnit4TestAdapter(IgnoredTest.class).run(result);
        assertEquals(1, result.runCount());
    }

    public static class Confused {
        @Test
        public void a(Object b) {
        }

        @Test
        public void a() {
        }
    }

    @Test(expected = InitializationError.class)
    public void overloaded() throws InitializationError {
        new BlockJUnit4ClassRunner(Confused.class);
    }

    public static class ConstructorParameter {
        public ConstructorParameter(Object something) {
        }

        @Test
        public void a() {
        }
    }

    @Test(expected = InitializationError.class)
    public void constructorParameter() throws InitializationError {
        new BlockJUnit4ClassRunner(ConstructorParameter.class);
    }

    public static class OnlyTestIsIgnored {
        @Ignore
        @Test
        public void ignored() {
        }
    }

    @Test
    public void onlyIgnoredMethodsIsStillFineTestClass() {
        Result result = JUnitCore.runClasses(OnlyTestIsIgnored.class);
        assertEquals(0, result.getFailureCount());
        assertEquals(1, result.getIgnoreCount());
    }
}