| // Copyright 2012 The Bazel Authors. 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.testing.junit.runner.junit4; |
| |
| import static com.google.testing.junit.runner.sharding.ShardingFilters.DEFAULT_SHARDING_STRATEGY; |
| |
| import com.google.testing.junit.runner.internal.Stdout; |
| import com.google.testing.junit.runner.internal.junit4.MemoizingRequest; |
| import com.google.testing.junit.runner.model.TestSuiteModel; |
| import com.google.testing.junit.runner.sharding.api.ShardingFilterFactory; |
| import com.google.testing.junit.runner.util.MemoizingSupplier; |
| import java.io.OutputStream; |
| import java.io.PrintStream; |
| import java.io.UnsupportedEncodingException; |
| import java.nio.charset.StandardCharsets; |
| import java.util.Set; |
| import java.util.function.Supplier; |
| import javax.inject.Singleton; |
| import org.junit.internal.TextListener; |
| import org.junit.runner.Request; |
| import org.junit.runner.notification.RunListener; |
| |
| /** |
| * Utility class for creating a {@link JUnit4Runner}. This contains the common bindings used when |
| * either the runner runs actual tests or when we do integration tests of the runner itself. |
| * This is a legacy Dagger module. |
| */ |
| public abstract class JUnit4RunnerBaseModule { |
| |
| abstract Set<JUnit4Runner.Initializer> initializers(); |
| |
| static ShardingFilterFactory shardingFilterFactory() { |
| return DEFAULT_SHARDING_STRATEGY; |
| } |
| |
| static RunListener textListener(TextListener impl) { |
| return impl; |
| } |
| |
| @Singleton |
| static Supplier<TestSuiteModel> provideTestSuiteModelSupplier(JUnit4TestModelBuilder builder) { |
| return new MemoizingSupplier<>(builder); |
| } |
| |
| @Singleton |
| static TextListener provideTextListener(@Stdout PrintStream testRunnerOut) { |
| return new TextListener(asUtf8PrintStream(testRunnerOut)); |
| } |
| |
| private static PrintStream asUtf8PrintStream(OutputStream stream) { |
| try { |
| return new PrintStream(stream, false /* autoFlush */, StandardCharsets.UTF_8.toString()); |
| } catch (UnsupportedEncodingException e) { |
| throw new IllegalStateException("UTF-8 must be supported as per the java language spec", e); |
| } |
| } |
| |
| @Singleton |
| static Request provideRequest(@TopLevelSuite Class<?> suiteClass) { |
| /* |
| * JUnit4Runner requests the Runner twice, once to build the model (before |
| * filtering) and once to run the tests (after filtering). Constructing the |
| * Runner can be expensive, so Memoize the Runner. |
| * |
| * <p>Note that as of JUnit 4.11, Request.aClass() will memoize the runner, |
| * but users of Bazel might use an earlier version of JUnit, so to be safe |
| * we keep the memoization here. |
| */ |
| Request request = Request.aClass(suiteClass); |
| return new MemoizingRequest(request); |
| } |
| |
| private JUnit4RunnerBaseModule() {} // no instances |
| } |