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NullAwayGuavaParametricNullnessTests.java
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NullAwayGuavaParametricNullnessTests.java
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/*
* Copyright (c) 2022 Uber Technologies, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
import com.google.errorprone.CompilationTestHelper;
import com.uber.nullaway.NullAway;
import java.util.Arrays;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
public class NullAwayGuavaParametricNullnessTests {
@Rule public final TemporaryFolder temporaryFolder = new TemporaryFolder();
private CompilationTestHelper defaultCompilationHelper;
@Before
public void setup() {
defaultCompilationHelper =
CompilationTestHelper.newInstance(NullAway.class, getClass())
.setArgs(
Arrays.asList(
"-d",
temporaryFolder.getRoot().getAbsolutePath(),
"-XepOpt:NullAway:AnnotatedPackages=com.uber,com.google.common"));
}
@Test
public void testFutureCallbackParametricNullness() {
defaultCompilationHelper
.addSourceLines(
"Test.java",
"package com.uber;",
"import com.google.common.util.concurrent.FutureCallback;",
"import javax.annotation.Nullable;",
"class Test {",
" public static <T> FutureCallback<T> wrapFutureCallback(FutureCallback<T> futureCallback) {",
" return new FutureCallback<T>() {",
" @Override",
" public void onSuccess(@Nullable T result) {",
" futureCallback.onSuccess(result);",
" }",
" @Override",
" public void onFailure(Throwable throwable) {",
" futureCallback.onFailure(throwable);",
" }",
" };",
" }",
"}")
.doTest();
}
@Test
public void testIterableParametricNullness() {
defaultCompilationHelper
.addSourceLines(
"Test.java",
"package com.uber;",
"import com.google.common.collect.ImmutableList;",
"import com.google.common.collect.Iterables;",
"import javax.annotation.Nullable;",
"class Test {",
" public static String test1() {",
" // BUG: Diagnostic contains: returning @Nullable expression",
" return Iterables.getFirst(ImmutableList.<String>of(), null);",
" }",
" public static @Nullable String test2() {",
" return Iterables.getFirst(ImmutableList.<String>of(), null);",
" }",
"}")
.doTest();
}
}