在订阅之前处理测试观察者的用例是什么？

Question

Observable class 有这个方法：

public final TestObserver<T> test(boolean dispose)

在订阅可观察对象之前处理测试观察者的用例是什么？

Answer 1

如果您要构建自定义运算符，则必须确保它符合反应流 specification. For example, it states the following for Subscription:

6 - After the Subscription is cancelled, additional Subscription.request(long n) MUST be NOPs.

7 - After the Subscription is cancelled, additional Subscription.cancel() MUST be NOPs.

该 dispose 方法只是 convenient method to help you to test these scenarios. You can check how it's being used in the RxJava code base here 单元测试运算符，如 Cache、Concat、Timeout..

这里是超时运算符的example：

    @Test
    public void disposeWhenFallback() {
        TestScheduler sch = new TestScheduler();

        SingleSubject<Integer> subj = SingleSubject.create();

        subj.timeout(1, TimeUnit.SECONDS, sch, Single.just(1))
        .test(true)
        .assertEmpty();

        assertFalse(subj.hasObservers());
    }

在观察者被释放后订阅它时检查流是否为空。

在订阅之前处理测试观察者的用例是什么？

What would be a use case for disposing a test observer before subscription?

rx-java

rx-java2