1.9.10/src/test/org/codehaus/jackson/map/util/TestClassUtil.java

package org.codehaus.jackson.map.util;

import java.util.*;

import static org.junit.Assert.*;

import org.codehaus.jackson.map.BaseMapTest;
import org.codehaus.jackson.map.util.ClassUtil;

public class TestClassUtil
    extends BaseMapTest
{
    /*
    /**********************************************************
    /* Test classes, enums
    /**********************************************************
     */

    /* Test classes and interfaces needed for testing class util
     * methods
     */
    static abstract class BaseClass implements Comparable<BaseClass>,
        BaseInt
    {
        BaseClass(String str) { }
    }

    interface BaseInt { }

    interface SubInt extends BaseInt { }

    enum TestEnum { A; }

    abstract class InnerNonStatic { }

    static class Inner {
        protected Inner() {
            throw new IllegalStateException("test");
        }
    }

    static abstract class SubClass
        extends BaseClass
        implements SubInt {
        SubClass() { super("x"); }
    }

    /*
    /**********************************************************
    /* Test methods
    /**********************************************************
     */
    
    public void testSuperTypes()
    {
        Collection<Class<?>> result = ClassUtil.findSuperTypes(SubClass.class, null);
        Class<?>[] classes = result.toArray(new Class<?>[result.size()]);
        Class<?>[] exp = new Class[] {
            SubInt.class, BaseInt.class,
            BaseClass.class,
            Comparable.class
        };
        assertArrayEquals(exp, classes);
    }

    public void testSuperInterfaces()
    {
        Collection<Class<?>> result = ClassUtil.findSuperTypes(SubInt.class, null);
        Class<?>[] classes = result.toArray(new Class<?>[result.size()]);
        Class<?>[] exp = new Class[] {
            BaseInt.class
        };
        assertArrayEquals(exp, classes);
    }
    
    public void testIsConcrete()
    {
        assertTrue(ClassUtil.isConcrete(getClass()));
        assertFalse(ClassUtil.isConcrete(BaseClass.class));
        assertFalse(ClassUtil.isConcrete(BaseInt.class));
    }

    public void testCanBeABeanType()
    {
        assertEquals("annotation", ClassUtil.canBeABeanType(java.lang.annotation.Retention.class));
        assertEquals("array", ClassUtil.canBeABeanType(String[].class));
        assertEquals("enum", ClassUtil.canBeABeanType(TestEnum.class));
        assertEquals("primitive", ClassUtil.canBeABeanType(Integer.TYPE));
        assertNull(ClassUtil.canBeABeanType(Integer.class));

        assertEquals("non-static member class", ClassUtil.isLocalType(InnerNonStatic.class, false));
        assertNull(ClassUtil.isLocalType(Integer.class, false));
    }

    public void testExceptionHelpers()
    {
        RuntimeException e = new RuntimeException("test");
        RuntimeException wrapper = new RuntimeException(e);

        assertSame(e, ClassUtil.getRootCause(wrapper));

        try {
            ClassUtil.throwAsIAE(e);
            fail("Shouldn't get this far");
        } catch (RuntimeException e2) {
            assertSame(e, e2);
        }

        try {
            ClassUtil.unwrapAndThrowAsIAE(wrapper);
            fail("Shouldn't get this far");
        } catch (RuntimeException e2) {
            assertSame(e, e2);
        }
    }

    public void testFailedCreateInstance()
    {
        try {
            ClassUtil.createInstance(BaseClass.class, true);
        } catch (IllegalArgumentException e) {
            verifyException(e, "has no default");
        }

        try {
            // false means ctor would need to be public
            ClassUtil.createInstance(Inner.class, false);
        } catch (IllegalArgumentException e) {
            verifyException(e, "is not accessible");
        }

        // and finally, check that we'll get expected exception...
        try {
            ClassUtil.createInstance(Inner.class, true);
        } catch (IllegalStateException e) {
            verifyException(e, "test");
        }
    }
}