Question

我正在尝试测试以下案例从本地获取数据，如果它不可用，则从网络查询。

我的测试看起来像这样：

@Test
public void getProfile_repositoryCachesAfterFirstSubscription_whenProfileAvailableInRemoteStorage() {


    // Given that the local data source has data available
    setProfileAvailable(profileRemoteDataSource, PROFILE);
    // And the remote data source does not have any data available
    setProfileNotAvailable(profileLocalDataSource);

    // When two subscriptions are set
    TestSubscriber<Optional<Profile>> testSubscriber1 = new TestSubscriber<>();
    profileRepository.getProfile().subscribe(testSubscriber1);

    TestSubscriber<Optional<Profile>> testSubscriber2 = new TestSubscriber<>();
    profileRepository.getProfile().subscribe(testSubscriber2);

    // Then profile were only requested once from remote and local sources
    verify(profileRemoteDataSource).getProfile();
    verify(profileLocalDataSource).getProfile();

    assertFalse(profileRepository.cacheIsDirty);
    testSubscriber1.assertValue(PROFILE);
    testSubscriber2.assertValue(PROFILE);
}

private void setProfileNotAvailable(ProfileDataSource dataSource) {
    when(dataSource.getProfile()).thenReturn(Flowable.just(Optional.absent()));

}

private void setProfileAvailable(ProfileDataSource dataSource, Optional<Profile> profile) {
    // don't allow the data sources to complete.
    when(dataSource.getProfile()).thenReturn(Flowable.just(profile).concatWith(Flowable.never()));

}

这是我的存储库

public Flowable<Optional<Profile>> getProfile() {
        Flowable<Optional<Profile>> localTask = localDataSource
                .getProfile()
                .doOnNext(singleData -> {
                    if (singleData.isPresent()) {
                        Profile profile = singleData.get();
                        saveSingleDataInToCash(profile);
                    }
                })
                .firstElement().toFlowable();
        Flowable<Optional<Profile>> remoteTask = remoteDataSource.getProfile()
                .doOnNext(singleData -> {
                    if (singleData.isPresent()) {
                        Profile profile = singleData.get();
                        saveProfile(profile);
                    }
                });
// Query the local storage if available. If not, query the network.

        return Flowable.concat(localTask, remoteTask)
                .firstElement()
                .toFlowable();

}

问题出在何时

// Query the local storage if available. If not, query the network.
     Flowable.concat(localTask, remoteTask)
                        .firstElement()
                        .toFlowable();

被称为我收到错误 org.mockito.exceptions.verification.TooManyActualInvocations： profileRemoteDataSource.getProfile（）;

但如果我将.firstElement（）更改为.elementAt（1），它可以正常工作，

所以我在这里错过了什么？预期的行为是当缺席的本地回归应该从网络重新开始。

如果source1不可用，则可流动的concat source1和source2返回source2

0 个答案: