如何对返回 Smallrye 叛变反应库的 Uni/Multi 的方法进行单元测试？

Question

我在Quarks 应用程序中使用 Smallrye Mutiniy 反应库，因为 Quarks 应用程序本身支持它。

我正在尝试为服务类编写单元测试。我不确定如何为返回Uni / Multi的方法编写单元测试。

一个方法返回Uni<String>

public Uni<String> hello(final String name) {
    final String message = "Hello " + name;
    return Uni.createFrom().item(message);
}

上述方法的实现单元

@Test
void testHello() {
    final Uni<String> casePass = hello("Ram");
    // assertion passes and all good with this.
    casePass.subscribe().with(message -> Assertions.assertEquals("Hello Ram", message));
    
    final Uni<String> caseFail = hello("Ravan");
    //  It is expected to fail the assertion, and it does. But the test is not failing, instead aseertion fail message simply logged to the console.
    caseFail.subscribe().with(message -> Assertions.assertEquals("Hello Sita", message));
}

控制台日志

[-- Mutiny had to drop the following exception --]
Exception received by: io.smallrye.mutiny.helpers.UniCallbackSubscriber.onItem(UniCallbackSubscriber.java:71)
org.opentest4j.AssertionFailedError: expected: <Hello Sita> but was: <Hello Ram>
    at org.junit.jupiter.api.AssertionUtils.fail(AssertionUtils.java:55)
    at org.junit.jupiter.api.AssertionUtils.failNotEqual(AssertionUtils.java:62)
    at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:182)
    at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:177)
    at org.junit.jupiter.api.Assertions.assertEquals(Assertions.java:1124)
...

Answer 1

我真的推荐使用 SmallRey 的测试方式。

https://smallrye.io/smallrye-mutiny/1.7.0/guides/testing/

例如，您仍然可以从多/单使用调用中获取对象。

 public static Uni<String> hello(final String name) {
    final String message = "Hello " + name;
    return Uni.createFrom().item(message);
}

@Test
public void testUnit() {
    UniAssertSubscriber<String> tester = hello("someone")
            .invoke( i -> Assertions.assertEquals("Hello someone", i))
            .invoke(i -> Assertions.assertNotNull(i))
            .subscribe().withSubscriber(UniAssertSubscriber.create());
    tester.assertCompleted();
}

@Test
public void secondUnit() {
    UniAssertSubscriber<String> tester = hello("none")
            .invoke( i -> Assertions.assertEquals("Hello someone", i))
            .invoke(i -> Assertions.assertNotNull(i))
            .subscribe().withSubscriber(UniAssertSubscriber.create());
    tester.assertCompleted();
}

我希望你能这样使用它