/*
* Copyright 2016 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.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** {@link UnusedCollectionModifiedInPlace}Test */
@RunWith(JUnit4.class)
public class UnusedCollectionModifiedInPlaceTest {
private final CompilationTestHelper compilationHelper =
CompilationTestHelper.newInstance(UnusedCollectionModifiedInPlace.class, getClass());
@Test
public void collectionsMethodCoverage() {
compilationHelper
.addSourceLines(
"Test.java",
"import java.util.Collections;",
"import java.util.ArrayList;",
"import java.util.List;",
"class Test {",
" void doIt(List<String> myList) {",
" // BUG: Diagnostic contains:",
" Collections.copy(new ArrayList<>(myList), null);",
" // BUG: Diagnostic contains:",
" Collections.fill(new ArrayList<>(myList), null);",
" // BUG: Diagnostic contains:",
" Collections.reverse(new ArrayList<>(myList));",
" // BUG: Diagnostic contains:",
" Collections.rotate(new ArrayList<>(myList), 5);",
" // BUG: Diagnostic contains:",
" Collections.shuffle(new ArrayList<>(myList));",
" // BUG: Diagnostic contains:",
" Collections.shuffle(new ArrayList<>(myList), null);",
" // BUG: Diagnostic contains:",
" Collections.sort(new ArrayList<>(myList));",
" // BUG: Diagnostic contains:",
" Collections.sort(new ArrayList<>(myList), null);",
" // BUG: Diagnostic contains:",
" Collections.swap(new ArrayList<>(myList), 1, 2);",
" }",
"}")
.doTest();
}
@Test
public void listsNewArrayList() {
compilationHelper
.addSourceLines(
"Test.java",
"import com.google.common.collect.Lists;",
"import java.util.Collections;",
"import java.util.List;",
"class Test {",
" void doIt(List<String> myList) {",
" // BUG: Diagnostic contains:",
" Collections.sort(Lists.newArrayList(myList));",
" // BUG: Diagnostic contains:",
" Collections.sort(Lists.newArrayList(myList), null);",
" }",
"}")
.doTest();
}
@Test
public void listsNewLinkedList() {
compilationHelper
.addSourceLines(
"Test.java",
"import com.google.common.collect.Lists;",
"import java.util.Collections;",
"import java.util.List;",
"class Test {",
" void doIt(List<String> myList) {",
" // BUG: Diagnostic contains:",
" Collections.sort(Lists.newLinkedList(myList));",
" // BUG: Diagnostic contains:",
" Collections.sort(Lists.newLinkedList(myList), null);",
" }",
"}")
.doTest();
}
@Test
public void negative() {
compilationHelper
.addSourceLines(
"Test.java",
"import java.util.Collections;",
"import java.util.List;",
"class Test {",
" void doIt(List<String> myList) {",
" Collections.sort(myList);",
" }",
"}")
.doTest();
}
}