/*
* 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 OperatorPrecedence}Test */
@RunWith(JUnit4.class)
public class OperatorPrecedenceTest {
private final CompilationTestHelper compilationTestHelper =
CompilationTestHelper.newInstance(OperatorPrecedence.class, getClass());
@Test
public void positive() {
compilationTestHelper
.addSourceLines(
"Test.java",
"class Test {",
" boolean f(boolean a, boolean b, boolean c) {",
" // BUG: Diagnostic contains: (a && b) || c",
" boolean r = a && b || c;",
" // BUG: Diagnostic contains: a || (b && c)",
" r = a || b && c;",
" // BUG: Diagnostic contains: a || (b && c) || !(b && c)",
" r = a || b && c || !(b && c);",
" return r;",
" }",
" int f(int a, int b) {",
" // BUG: Diagnostic contains: (a + b) << 2",
" return a + b << 2;",
" }",
"}")
.doTest();
}
@Test
public void negative() {
compilationTestHelper
.addSourceLines(
"Test.java",
"class Test {",
" int f(int a, int b) {",
" int r = a + a * b;",
" return r;",
" }",
" boolean f(boolean a, boolean b) {",
" boolean r = (a && b) || (!a && !b);",
" r = (a = a && b);",
" return r;",
" }",
"}")
.doTest();
}
}