org.apache.james.AggregateGuiceModuleTestRule.java Source code

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Here is the source code for org.apache.james.AggregateGuiceModuleTestRule.java

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package org.apache.james;

import java.util.List;

import org.junit.rules.RuleChain;
import org.junit.runner.Description;
import org.junit.runners.model.Statement;

import com.github.steveash.guavate.Guavate;
import com.google.common.collect.ImmutableList;
import com.google.inject.Module;
import com.google.inject.util.Modules;

public class AggregateGuiceModuleTestRule implements GuiceModuleTestRule {

    public static AggregateGuiceModuleTestRule of(GuiceModuleTestRule... subrule) {
        return new AggregateGuiceModuleTestRule(ImmutableList.copyOf(subrule));
    }

    private final List<GuiceModuleTestRule> subrule;
    private final RuleChain chain;

    private AggregateGuiceModuleTestRule(List<GuiceModuleTestRule> subrule) {
        this.subrule = subrule;
        this.chain = subrule.stream().reduce(RuleChain.emptyRuleChain(), RuleChain::around, RuleChain::around);
    }

    public AggregateGuiceModuleTestRule aggregate(GuiceModuleTestRule... subrule) {
        List<GuiceModuleTestRule> guiceModules = ImmutableList.<GuiceModuleTestRule>builder().addAll(this.subrule)
                .add(subrule).build();

        return new AggregateGuiceModuleTestRule(guiceModules);
    }

    @Override
    public Module getModule() {
        List<Module> modules = subrule.stream().map(GuiceModuleTestRule::getModule)
                .collect(Guavate.toImmutableList());

        return Modules.combine(modules);
    }

    @Override
    public Statement apply(Statement base, Description description) {
        return chain.apply(base, description);
    }

    @Override
    public void await() {
        subrule.parallelStream().forEach(GuiceModuleTestRule::await);
    }
}