/*
* Copyright 2012 Google Inc. 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.errorprone.bugpatterns;
import com.google.errorprone.CompilationTestHelper;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** @author alexeagle@google.com (Alex Eagle) */
@RunWith(JUnit4.class)
public class ReturnValueIgnoredTest {
private CompilationTestHelper compilationHelper;
@Before
public void setUp() {
compilationHelper = CompilationTestHelper.newInstance(ReturnValueIgnored.class, getClass());
}
@Test
public void testPositiveCases() throws Exception {
compilationHelper.addSourceFile("ReturnValueIgnoredPositiveCases.java").doTest();
}
@Test
public void testNegativeCase() throws Exception {
compilationHelper.addSourceFile("ReturnValueIgnoredNegativeCases.java").doTest();
}
@Test
public void function() {
compilationHelper
.addSourceLines(
"Test.java",
"import java.util.function.Function;",
"class Test {",
" void f(Function<Integer, Integer> f) {",
" // BUG: Diagnostic contains:",
" f.apply(0);",
" }",
"}")
.doTest();
}
@Test
public void consumer() {
compilationHelper
.addSourceLines(
"Test.java",
"import java.util.function.Consumer;",
"class Test {",
" void f(Consumer<Integer> f) {",
" f.accept(0);",
" }",
"}")
.doTest();
}
@Test
public void functionVoid() {
compilationHelper
.addSourceLines(
"Test.java",
"import java.util.function.Function;",
"class Test {",
" void f(Function<Integer, Void> f) {",
" f.apply(0);",
" }",
"}")
.doTest();
}
@Test
public void ignoreInTests() throws Exception {
compilationHelper
.addSourceLines(
"Test.java",
"import static org.junit.Assert.fail;",
"import java.util.function.Function;",
"class Test {",
" void f(Function<Integer, Integer> f) {",
" try {",
" f.apply(0);",
" fail();",
" } catch (Exception expected) {}",
" }",
"}")
.doTest();
}
@Test
public void stream() {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" void f() {",
" // BUG: Diagnostic contains:",
" \"\".codePoints().count();",
" \"\".codePoints().forEach(i -> {});",
" }",
"}")
.doTest();
}
}