| /* |
| * Copyright (C) 2023 The Android Open Source Project |
| * |
| * 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.android.modules.testing.utils; |
| |
| import static java.lang.annotation.ElementType.ANNOTATION_TYPE; |
| import static java.lang.annotation.ElementType.CONSTRUCTOR; |
| import static java.lang.annotation.ElementType.FIELD; |
| import static java.lang.annotation.ElementType.METHOD; |
| import static java.lang.annotation.ElementType.PACKAGE; |
| import static java.lang.annotation.ElementType.TYPE; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| |
| import org.junit.AssumptionViolatedException; |
| import org.junit.rules.TestRule; |
| import org.junit.runner.Description; |
| import org.junit.runners.model.Statement; |
| |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| import java.lang.annotation.Target; |
| |
| /** |
| * A JUnit Rule to skip tests that rely on <pre>@FlaggedApi</pre> symbols, if those symbols have |
| * been configured to be hidden. |
| * |
| * <p>This rule prevents the tests from breaking when public symbols are made hidden because of |
| * <pre>@FlaggedApi</pre>. To tell the JUnit framework which tests that rely on |
| * <pre>@FlaggedApi</pre> symbols, annotate the test with <pre>@FlaggedApiRule.UsesFlaggedApi</pre>. |
| * |
| * <p>Example usage: |
| * |
| * <pre> |
| * @RunWith(AndroidJUnit4.class) |
| * public class Test { |
| * @Rule |
| * public final FlaggedApiRule mFlaggedApiRule = FlaggedApiRule.getInstance(); |
| * |
| * @Test |
| * @FlaggedApiRule.UsesFlaggedApi |
| * public void testFlaggedApiSymbol() throws Exception { |
| * // test that calls a @FlaggedApi method |
| * } |
| * |
| * @Test |
| * public void testThatWillAlwaysRun() throws Eception { |
| * // test that calls a non-@FlaggedApi method |
| * } |
| * } |
| * </pre> |
| * |
| * <p>Note: because <pre>@FlaggedApiRule.UsesFlaggedApi</pre> can be completely skipped, make sure |
| * to have other tests that verify the non-<pre>@FlaggedApi</pre> parts of your code, or your test |
| * coverage may be smaller than expected. |
| * |
| * <p>Note: requires JUnit 4. |
| * |
| * @see android.annotation.FlaggedApi |
| */ |
| public abstract class FlaggedApiRule implements TestRule { |
| private static final boolean SKIP_TESTS_ANNOTATED_FLAGGED_API = false; |
| |
| private static final FlaggedApiRule sInstance; |
| |
| static { |
| if (SKIP_TESTS_ANNOTATED_FLAGGED_API) { |
| sInstance = new SkipTestsAnnotatedWithUsesFlaggedApiRule(); |
| } else { |
| sInstance = new DoNothingRule(); |
| } |
| } |
| |
| public static FlaggedApiRule getInstance() { |
| return sInstance; |
| } |
| |
| @VisibleForTesting |
| protected static final class SkipTestsAnnotatedWithUsesFlaggedApiRule extends FlaggedApiRule { |
| @Override |
| public Statement apply(Statement statement, Description description) { |
| return new Statement() { |
| @Override |
| public void evaluate() throws Throwable { |
| if (description.getAnnotation(UsesFlaggedApi.class) != null) { |
| throw new AssumptionViolatedException("Skip @UsesFlaggedApi annotated test"); |
| } |
| statement.evaluate(); |
| } |
| }; |
| } |
| } |
| |
| @VisibleForTesting |
| protected static final class DoNothingRule extends FlaggedApiRule { |
| @Override |
| public Statement apply(Statement statement, Description description) { |
| return statement; |
| } |
| } |
| |
| @Target({TYPE, FIELD, METHOD, CONSTRUCTOR, ANNOTATION_TYPE, PACKAGE}) |
| @Retention(RetentionPolicy.RUNTIME) |
| public @interface UsesFlaggedApi {} |
| } |