| // 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 com.google.common.truth.Truth.assertThat; |
| |
| 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 { |
| assertThat( |
| GenericTypeHelper.getActualReturnType( |
| implementingClass, implementingClass.getMethod("doIt"))) |
| .isEqualTo(expected); |
| } |
| |
| @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); |
| } |
| } |