运行 Gradle 使用多个 Java 工具链进行测试

Question

我有一个 Gradle 项目，它使用由工具链指定的 Java 版本 API:

val minimumJava = JavaLanguageVersion.of(8)
val maximumJava = JavaLanguageVersion.of(16)
java {
    toolchain {
        languageVersion.set(minimumJava)
        vendor.set(JvmVendorSpec.ADOPTOPENJDK)
    }
}

我希望能够使用支持的最低 Java 版本进行编译，然后运行使用项目支持的所有 JDK 进行测试。我尝试了以下方法，但显然只执行了原始测试，所有其他测试都没有执行，即使所需的 JDK 已正确下载和设置：

for (javaVersion in JavaLanguageVersion.of(minimumJava.asInt() + 1)..maximumJava) {
    val base = tasks.test.get()
    val testTask = tasks.register<Test>("testUnderJava${javaVersion.asInt()}") {
        javaLauncher.set(
            javaToolchains.launcherFor {
                languageVersion.set(javaVersion)
            }
        )
        classpath = base.classpath
        testClassesDirs = base.testClassesDirs
        isScanForTestClasses = true
    }
    tasks.test.configure { finalizedBy(testTask) }
}

这是哑终端中的运行：

❯ TERM=dumb ./gradlew test testUnderJava10 --rerun-tasks --scan
Picked up _JAVA_OPTIONS: -Dawt.useSystemAAFontSettings=on

<<<SNIP>>>

> Task :testClasses

> Task :test
Picked up _JAVA_OPTIONS: -Dawt.useSystemAAFontSettings=on

Gradle Test Executor 4 STANDARD_OUT
    ~~~ Kotest Configuration ~~~
    -> Parallelization factor: 1
    -> Concurrent specs: null
    -> Global concurrent tests: 1
    -> Dispatcher affinity: true
    -> Default test timeout: 600000ms
    -> Default test order: Sequential
    -> Default isolation mode: SingleInstance
    -> Global soft assertions: false
    -> Write spec failure file: false
    -> Fail on ignored tests: false
    -> Spec execution order: SpecExecutionOrder
    -> Remove test name whitespace: false
    -> Append tags to test names: false
    -> Extensions
      - io.kotest.engine.extensions.SystemPropertyTagExtension
      - io.kotest.core.extensions.RuntimeTagExtension
      - io.kotest.engine.extensions.RuntimeTagExpressionExtension


org.danilopianini.template.test.Tests > A greeting should get printed STARTED

org.danilopianini.template.test.Tests > A greeting should get printed STANDARD_OUT
    [:hello=SUCCESS]

    > Task :hello
    Hello from Danilo Pianini

    BUILD SUCCESSFUL in 2s
    1 actionable task: 1 executed


org.danilopianini.template.test.Tests > A greeting should get printed PASSED

<<<Other tests have no output!>>>

> Task :testUnderJava9
> Task :testUnderJava8
> Task :testUnderJava16
> Task :testUnderJava15
> Task :testUnderJava14
> Task :testUnderJava13
> Task :testUnderJava12
> Task :testUnderJava11
> Task :testUnderJava10

BUILD SUCCESSFUL in 23s
36 actionable tasks: 36 executed

<<<SNIP>>>

从build scan, it appears that tests are not executed but those with JDK8. I'm puzzled, the docs说起，这应该是直截了当的：

tasks.register<Test>("testsOn14") {
    javaLauncher.set(javaToolchains.launcherFor {
        languageVersion.set(JavaLanguageVersion.of(14))
    })
}

Answer 1

我想我找出了我遇到的问题的根本原因，我发布了解决方案以防其他人遇到类似问题。我有以下测试配置：

tasks.test {
    useJUnitPlatform()
    testLogging {
        showStandardStreams = true
        showCauses = true
        showStackTraces = true
        events(*org.gradle.api.tasks.testing.logging.TestLogEvent.values())
        exceptionFormat = org.gradle.api.tasks.testing.logging.TestExceptionFormat.FULL
    }
}

正在将名为 test 的任务指示给 useJunitPlatform()。此设置不会自动传播到所有后续 Test 任务（当然）。所以，在这种情况下，解决方案就是简单地使用：

tasks.withType<Test> { 
    // Same configuration as above
}

更新 2022-03-16

我决定创建一个 multi-JVM testing plugin for Gradle，以便创建所有测试任务，并且跨项目需要更少的样板文件。

运行 Gradle 使用多个 Java 工具链进行测试

Run Gradle tests with multiple Java toolchains

java

testing

multiplatform

gradle

kotlin

更新 2022-03-16