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// Copyright 2014 The Bazel Authors. All rights reserved.
//
// 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 com.google.devtools.common.options;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Tests {@link GenericTypeHelper}.
*/
@RunWith(JUnit4.class)
public class GenericTypeHelperTest {
private static interface DoSomething<T> {
T doIt();
}
private static class StringSomething implements DoSomething<String> {
@Override
public String doIt() {
return null;
}
}
private static class EnumSomething<T> implements DoSomething<T> {
@Override
public T doIt() {
return null;
}
}
private static class AlphabetSomething extends EnumSomething<String> {
}
private static class AlphabetTwoSomething extends AlphabetSomething {
}
private static void assertDoIt(Class<?> expected,
Class<? extends DoSomething<?>> implementingClass) throws Exception {
assertEquals(expected,
GenericTypeHelper.getActualReturnType(implementingClass,
implementingClass.getMethod("doIt")));
}
@Test
public void getConverterType() throws Exception {
assertDoIt(String.class, StringSomething.class);
}
@Test
public void getConverterTypeForGenericExtension() throws Exception {
assertDoIt(String.class, AlphabetSomething.class);
}
@Test
public void getConverterTypeForGenericExtensionSecondGrade() throws Exception {
assertDoIt(String.class, AlphabetTwoSomething.class);
}
}
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