JUnit 5参数化测试-“无法使用Kotlin在@MethodSource中调用非静态方法”

vmpqdwk3  于 2022-11-11  发布在  Kotlin
关注(0)|答案(4)|浏览(149)

预期

将标准的JUnit 5测试转换为参数化测试，以便使用Kotlin中的@ParamterizedTest和@MethodSource注解迭代测试用例流。

观察

@MethodSource无法访问数据流。这似乎是此注解的一个问题，因为@ValueSource(strings = ["SF", "NYC"])按预期遍历静态定义的选项。
错误：
前提条件违规异常：无法对空目标调用非静态方法{someMethodName}。

实施

参数化测试被设置为传入一个数据类流，类似于菲利普Hauer在参数化测试的数据类中概述的设置。
编号

  • build.gradle（：某个项目）*
dependencies {
    ...    
    classpath("de.mannodermaus.gradle.plugins:android-junit5:$junit5_version")
}
  • 编译.gradle（：一些模块）*
apply plugin: "de.mannodermaus.android-junit5"
android {
    ...
    compileOptions.targetCompatibility = JavaVersion.VERSION_1_8
    kotlinOptions.jvmTarget = "1.8"
}
dependencies {
    testImplementation "org.junit.jupiter:junit-jupiter-api:5.6.2"
    testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:5.6.2"
    testImplementation "org.junit.jupiter:junit-jupiter-params:5.6.2"
}
  • 部分测试.kt*
class SomeTest {
    private val testDispatcher = TestCoroutineDispatcher()

    private fun someDataStates() = Stream.of(
        // Kotlin data class
        TestState("123"),
        TestState("345")
    )

    @ParameterizedTest
    @MethodSource("someDataStates")
    fun someTest(testState: TestState) = testDispatcher.runBlockingTest {
        // Test state here.
        ...
    }
}

构建环境

  • 安卓工作室4.0
  • 构建编号AI-193.6911.18.40.6514223，构建日期：2020年5月20日
  • 执行阶段版本：1.8.0_242-发布版-1644B3 - 6222593x86_64
  • 虚拟机：OpenJDK 64位服务器虚拟机，由JetBrains s.r.o提供
  • Mac OS X 10.15.5操作系统
  • GC：ParNew，并发标记清除
  • 内存：1979 M
  • 内核数：16
  • 注册表：ide.new.welcome.screen.force=true
  • 非捆绑插件：如果您是一名开发人员，请登录以下网址：cn.wjdghd.unique.plugin.id，网址：android。

尝试的解决方案

1.将测试用例数据状态重构为顶级函数。

  • 测试案例.kt*
fun someDataStates() = Stream.of(
    TestState("123"),
    TestState("345")
)
  • 部分测试.kt*
private fun SomeDataStates() = someDataStates()

@ParameterizedTest
@MethodSource("SomeDataStates")
fun someTest(testState: TestState) = testDispatcher.runBlockingTest {
   // Test state here.
   ...

}

2.将测试用例数据状态重构为List类型的顶级函数，而不是Stream。

fun someDataStates() = listOf(
    TestState("123"),
    TestState("345")
)

完整的错误日志

如果您在运行时遇到异常，请执行以下操作：无法在空目标上调用非静态方法[private final {someMethodName}。

at org.junit.platform.commons.util.Preconditions.condition(Preconditions.java:296) at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:682) at org.junit.jupiter.params.provider.MethodArgumentsProvider.lambda$provideArguments$1(MethodArgumentsProvider.java:46) at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482) at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472) at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:485) at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:272) at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482) at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472) at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:485) at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:272) at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482) at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472) at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:485) at org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:106) at org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:41) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:135) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80) at java.util.ArrayList.forEach(ArrayList.java:1257) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80) at java.util.ArrayList.forEach(ArrayList.java:1257) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32) at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57) at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:248) at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$5(DefaultLauncher.java:211) at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:226) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:199) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:132) at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:69) at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33) at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230) at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58) Suppressed: org.junit.platform.commons.PreconditionViolationException: Configuration error: You must configure at least one set of arguments for this @ParameterizedTest at org.junit.platform.commons.util.Preconditions.condition(Preconditions.java:281) at org.junit.jupiter.params.ParameterizedTestExtension.lambda$provideTestTemplateInvocationContexts$6(ParameterizedTestExtension.java:90) at java.util.stream.AbstractPipeline.close(AbstractPipeline.java:323) at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:279) ... 49 more

进程已结束，退出代码为255

junit

4条答案

按热度按时间
jgovgodb

jgovgodb1#

我猜您缺少了告诉JUnit示例化您的测试类一次的信息，如下所示：

import org.junit.jupiter.api.TestInstance
import org.junit.jupiter.api.TestInstance.Lifecycle.PER_CLASS

@TestInstance(PER_CLASS) // <--- This one will do the trick
class SomeTest {

    private val testDispatcher = TestCoroutineDispatcher()

    @ParameterizedTest
    @MethodSource("someDataStates")
    fun someTest(testState: TestState) = testDispatcher.runBlockingTest {
        // Test state here.
        ...
    }

    private fun someDataStates() = listOf(
        TestState("123"),
        TestState("345")
    )
}
赞(0）分享  回复(0）举报  2022-11-11
7xllpg7q

7xllpg7q2#

使用@TestInstance(PER_CLASS)时，你可能会遇到麻烦，例如，当你试图验证一个函数已经被mockito或mockk调用了X次时，你必须对所有的调用求和。
在这种情况下，请使用@JvmStatic：

class SomeTest {

    companion object{
        @JvmStatic
        private fun someDataStates() = listOf(
            TestState("123"),
            TestState("345")
        )
    }

    private val testDispatcher = TestCoroutineDispatcher()

    @ParameterizedTest
    @MethodSource("someDataStates")
    fun someTest(testState: TestState) = testDispatcher.runBlockingTest {
        // Test state here.
        ...
    }
}
  • 编辑27/08/2021：* 自Kotlin的最新版本（用1.5.21测试）以来，不要将@JvmStatic方法设置为private，否则它将再次以PreconditionViolationException结束
赞(0）分享  回复(0）举报  2022-11-11
5f0d552i

5f0d552i3#

如果由于某种原因您不能使用@TestInstance(PER_CLASS)注解，您可以在测试方法中使用@TestFactory注解而不是@ParameterizedTest注解。

@TestFactory
Stream<DynamicTest> someTest() {
    return someDataStates().map(testState -> DynamicTest.dynamicTest(testState.getName(), () -> someTest0(testState)));
}

private void someTest0(TestState testState) {
    // Test state here.
}

private Stream<TestState> someDataStates() {
    return Stream.of(
            new TestState("123"),
            new TestState("345")
    );
}
赞(0）分享  回复(0）举报  2022-11-11
n3schb8v

n3schb8v4#

尝试将@MethodSource("someDataStates")内部使用的sometDataStates方法设为static

赞(0）分享  回复(0）举报  2022-11-11
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