如何将 JUnit 注释组合成自定义注释? [英] How to combine JUnit annotations into a custom annotation?

问题描述

(使用 OpenJDK-13 和 JUnit5-Jupiter)

(Using OpenJDK-13 and JUnit5-Jupiter)

问题是我的单元测试每个都使用了一个不小的 JUnit 注释系统，如下所示:

The problem is that my unit tests each make use of a not-small JUnit annotation system, something like this:

@ParameterizedTest
@MethodSource("myorg.ccrtest.testlogic.DataProviders#standardDataProvider")
@Tags({@Tag("ccr"), @Tag("standard")})

这使得测试编写有点乏味，测试代码有点长，当然，当需要更改时，这是一件苦差事！

This makes test authoring a little tedious, test code a little long and of course, when a change is needed, it's a chore!

想知道我是否可以创建自己的 JUnit 注释:@CcrStandardTest，这意味着上面的所有注释?

Was wondering if I could create my own JUnit annotation: @CcrStandardTest, which would imply all of the annotations above?

我还尝试将类定义中的注解上移(希望它们随后适用于类的所有方法)，但编译器说不:@ParameterizedTest 不适用于类型"

I also tried shifting the annotations up in the class definition (hoping they would then apply to all methods of the class), but the compiler says no: "@ParameterizedTest is not applicable to type"

推荐答案

您可以制作一个 组合注释:

JUnit Jupiter 注释可以用作元注释.这意味着您可以定义自己的组合注解，该注解将自动继承元注解的语义.

JUnit Jupiter annotations can be used as meta-annotations. That means that you can define your own composed annotation that will automatically inherit the semantics of its meta-annotations.

例如:

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.MethodSource;

@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.ANNOTATION_TYPE, ElementType.METHOD})
@ParameterizedTest
@MethodSource("myorg.ccrtest.testlogic.DataProviders#standardDataProvider")
@Tag("ccr")
@Tag("standard")
public @interface CcrStandardTest {}

然后您将组合注释放在您的测试方法上:

You would then place the composed annotation on your test method:

@CcrStandardTest
void testFoo(/* necessary parameters */) {
  // perform test
}

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