/
FallThroughTest.java
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/
FallThroughTest.java
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/*
* Copyright 2017 The Error Prone Authors.
*
* 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 static org.junit.Assume.assumeTrue;
import com.google.errorprone.CompilationTestHelper;
import com.google.errorprone.util.RuntimeVersion;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** {@link FallThrough}Test */
@RunWith(JUnit4.class)
public class FallThroughTest {
private final CompilationTestHelper testHelper =
CompilationTestHelper.newInstance(FallThrough.class, getClass());
@Test
public void positive() {
testHelper.addSourceFile("FallThroughPositiveCases.java").doTest();
}
@Test
public void negative() {
testHelper.addSourceFile("FallThroughNegativeCases.java").doTest();
}
@Test
public void foreverLoop() {
testHelper
.addSourceLines(
"Test.java",
"class Test {",
" void f(int x) {",
" switch (x) {",
" case 1:",
" for (;;) {}",
" case 2:",
" break;",
" }",
" }",
"}")
.doTest();
}
@Test
public void commentInBlock() {
testHelper
.addSourceLines(
"Test.java",
"class Test {",
" void f(int x) {",
" switch (x) {",
" case 0: {",
" // fall through",
" }",
" case 1: {",
" System.err.println();",
" // fall through",
" }",
" case 2:",
" break;",
" }",
" }",
"}")
.doTest();
}
@Test
public void emptyBlock() {
testHelper
.addSourceLines(
"Test.java",
"class Test {",
" void f(char c, boolean b) {",
" switch (c) {",
" case 'a': {}",
" // fall through",
" default:",
" }",
" }",
"}")
.doTest();
}
@Test
public void arrowSwitch() {
assumeTrue(RuntimeVersion.isAtLeast14());
testHelper
.addSourceLines(
"Test.java",
"class Test {",
" enum Case { ONE, TWO }",
" void m(Case c) {",
" switch (c) {",
" case ONE -> {}",
" case TWO -> {}",
" default -> {}",
" }",
" }",
"}")
.doTest();
}
}