/
MissingCasesInEnumSwitchTest.java
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/
MissingCasesInEnumSwitchTest.java
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/*
* Copyright 2014 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;
/** {@link MissingCasesInEnumSwitch}Test */
@RunWith(JUnit4.class)
public class MissingCasesInEnumSwitchTest {
private CompilationTestHelper compilationHelper;
@Before
public void setUp() {
compilationHelper =
CompilationTestHelper.newInstance(MissingCasesInEnumSwitch.class, getClass());
}
@Test
public void testExhaustive() throws Exception {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" enum Case { ONE, TWO, THREE }",
" void m(Case c) {",
" switch (c) {",
" case ONE:",
" case TWO:",
" case THREE:",
" System.err.println(\"found it!\");",
" break;",
" }",
" }",
"}"
)
.doTest();
}
@Test
public void testNonExhaustive_withDefault() throws Exception {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" enum Case { ONE, TWO, THREE }",
" void m(Case c) {",
" switch (c) {",
" case ONE:",
" case TWO:",
" System.err.println(\"found it!\");",
" break;",
" default:",
" break;",
" }",
" }",
"}"
)
.doTest();
}
@Test
public void testNonExhaustive() throws Exception {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" enum Case { ONE, TWO, THREE }",
" void m(Case c) {",
" // BUG: Diagnostic contains: Non-exhaustive switch, expected cases for: THREE",
" switch (c) {",
" case ONE:",
" case TWO:",
" System.err.println(\"found it!\");",
" break;",
" }",
" }",
"}")
.doTest();
}
@Test
public void testNonExhaustive_manyCases() throws Exception {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" enum Case { ONE, TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT }",
" void m(Case c) {",
" // BUG: Diagnostic contains:",
" // Non-exhaustive switch, expected cases for: TWO, THREE, FOUR, and 4 others",
" switch (c) {",
" case ONE:",
" System.err.println(\"found it!\");",
" break;",
" }",
" }",
"}")
.doTest();
}
@Test
public void testNonExhaustive_nonEnum() throws Exception {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" void m(int i) {",
" switch (i) {",
" case 1:",
" case 2:",
" System.err.println(\"found it!\");",
" break;",
" }",
" }",
"}")
.doTest();
}
@Test
public void empty() throws Exception {
compilationHelper
.addSourceLines(
"Test.java",
"class Test {",
" enum Case { ONE, TWO }",
" void m(Case e) {",
" // BUG: Diagnostic contains:",
" // mean 'default: throw new AssertionError(\"unexpected case: \" + e);'"
+ " or 'case ONE: case TWO: break;' or 'default: break;'?",
" switch (e) {",
" }",
" }",
"}")
.doTest();
}
}