luni/src/test/java/libcore/java/lang/ClassTest.java

/*
 * Copyright (C) 2013 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package libcore.java.lang;

import junit.framework.TestCase;

public class ClassTest extends TestCase {

    interface Foo {
        public void foo();
    }

    interface ParameterizedFoo<T> {
        public void foo(T param);
    }

    interface ParameterizedBar<T> extends ParameterizedFoo<T> {
        public void bar(T param);
    }

    interface ParameterizedBaz extends ParameterizedFoo<String> {

    }

    public void test_getGenericSuperclass_nullReturnCases() {
        // Should always return null for interfaces.
        assertNull(Foo.class.getGenericSuperclass());
        assertNull(ParameterizedFoo.class.getGenericSuperclass());
        assertNull(ParameterizedBar.class.getGenericSuperclass());
        assertNull(ParameterizedBaz.class.getGenericSuperclass());

        assertNull(Object.class.getGenericSuperclass());
        assertNull(void.class.getGenericSuperclass());
        assertNull(int.class.getGenericSuperclass());
    }

    public void test_getGenericSuperclass_returnsObjectForArrays() {
        assertSame(Object.class, (new Integer[0]).getClass().getGenericSuperclass());
    }

    interface A {
        public static String name = "A";
    }
    interface B {
        public static String name = "B";
    }
    class X implements A { }
    class Y extends X implements B { }
    public void test_getField() {
        try {
            assertEquals(A.class.getField("name"), X.class.getField("name"));
        } catch (NoSuchFieldException e) {
            fail("Got exception");
        }
        try {
            assertEquals(B.class.getField("name"), Y.class.getField("name"));
        } catch (NoSuchFieldException e) {
            fail("Got exception");
        }
    }

    interface C {
        void foo();
    }
    interface D extends C {
        void foo();
    }
    abstract class Z implements D { }

    public void test_getMethod() {
      try {
          assertEquals(Z.class.getMethod("foo"), D.class.getMethod("foo"));
      } catch (NoSuchMethodException e) {
          fail("Got exception");
      }
    }
}