使用 cucumber-jvm 4 并行运行黄瓜测试 [英] run cucumber tests parallel using cucumber-jvm 4

问题描述

Java v8.x - spring v5.x 黄瓜 v4.2.0

Java v8.x - spring v5.x cucumber v4.2.0

我试过 temyers/cucumber-jvm-parallel-plugin 并且它工作正常，但是当我进入他们的 gitihub 页面时，他们宣布停止使用这个插件 b/c 黄瓜已经开始支持并行测试来自 cucumber-jvm 4.0.0 的运行支持.

i tried temyers/cucumber-jvm-parallel-plugin and it works fine, but when i get to their gitihub page they announced to stop using this plugin b/c cucumber already have start supporting parallel test running support from cucumber-jvm 4.0.0.

我有使用以下 maven 依赖项的现有测试.

I have existing tests with using following maven dependencies.

cucumber-java v4.2.0
cucumber-junit v4.2.0
cucumber-spring v4.2.0

我有两个问题让我很困惑.

i have two questions making me confuse.

1. 为了使用 cucumber-jvm，我必须更改我的依赖项，否则我当前的依赖项将起作用.
2. 我可以只传递一个参数 --parallel 来启动并行黄瓜测试吗?

感谢任何帮助.

推荐答案

cucumber-jvm:4.0.0 中引入了并行支持.所以你的依赖没问题.

Parallel support was introduced in cucumber-jvm:4.0.0. So your dependencies are ok.

如果您使用的是 Maven:

If you are using Maven:

Cucumber JUnit - 使用 Maven 并行执行

Cucumber JUnit 支持跨多个线程并行执行功能文件.要使用 maven 启用此功能，请将并行属性设置为 methods 或 both.

Cucumber JUnit supports parallel execution of feature files across multiple threads. To enable this with maven set the parallel property to either methods or both.

<build>
    <plugins>
        <plugin>
            <artifactId>maven-surefire-plugin</artifactId>
            <configuration>
                <parallel>both</parallel>
                <threadCount>4</threadCount>
            </configuration>
        </plugin>
    </plugins>
</build>

如果您使用的是 Gradle，最好使用 Gradle Cucumber 插件，因为 Gradle 不支持子类级别的并行化.在这种情况下，您不需要 cucumber-junit.

If you are using Gralde you are better off using the Gradle Cucumber Plugin as Gradle doesn't support sub-class level parallelization. In this case you don't need cucumber-junit.

Gradle Cucumber runner - 并行运行功能

如果你指定数量，Cucumber 支持并行执行要使用的线程.这可以通过两种方式完成

Cucumber supports parallel execution if you specify the number of thread to use. This can be done in two ways

• 从命令行运行的选项，./gradlew cucumber --threads 4，这将运行四个并行线程
• 一个扩展，即在你的 build.gradle 文件中的 cucumber 部分设置值.

• An option whn running from a command line, ./gradlew cucumber --threads 4, this will run four parallel threads
• An extension, that is setting the value in your build.gradle file in the cucumber section.

在构建脚本中设置值时，您无法真正知道如何构建将可以访问的许多线程.硬编码固定数字可能不是您的最佳选择.

When setting the value in the build script, you can't really know how many threads the build will have access to. Hardcoding a fixed number may not be your best option.

指定要使用的线程数的一种方法是:

One way of specifying the number of threads to use is:

cucumber {
    threads = = Runtime.runtime.availableProcessors().intdiv(2) ?: 1 
}

这将使用尽可能多的线程，同时将资源留给要执行的 Gradle.

This will use as many threads as possible while leaving resources for Gradle to execute.

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