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// 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.junit4.runner.MemoizingRequest;
import com.google.testing.junit.runner.internal.Stdout;
import com.google.testing.junit.runner.junit4.JUnit4InstanceModules.SuiteClass;
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 com.google.testing.junit.runner.util.Supplier;
import dagger.Module;
import dagger.Provides;
import dagger.multibindings.IntoSet;
import dagger.multibindings.Multibinds;
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.UnsupportedEncodingException;
import java.nio.charset.StandardCharsets;
import java.util.Set;
import javax.inject.Singleton;
import org.junit.internal.TextListener;
import org.junit.runner.Request;
import org.junit.runner.notification.RunListener;
/**
* Dagger module 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.
*/
@Module(includes = SuiteClass.class)
public abstract class JUnit4RunnerBaseModule {
@Multibinds
abstract Set<JUnit4Runner.Initializer> initializers();
@Provides
static ShardingFilterFactory shardingFilterFactory() {
return DEFAULT_SHARDING_STRATEGY;
}
@Provides
@IntoSet
static RunListener textListener(TextListener impl) {
return impl;
}
@Provides
@Singleton
static Supplier<TestSuiteModel> provideTestSuiteModelSupplier(JUnit4TestModelBuilder builder) {
return new MemoizingSupplier<>(builder);
}
@Provides
@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);
}
}
@Provides
@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.
*/
Request request = Request.aClass(suiteClass);
return new MemoizingRequest(request);
}
private JUnit4RunnerBaseModule() {} // no instances
}
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