测试一种从RX调用的方法

Question

我创建了一种从web-service接收一些数据的方法，我正在使用retrofit，rx，并且我正在使用juint和mockito来测试我的代码。我可以很好地测试此方法，但是在onCompleted的rx方法中，我正在调用另一种方法（ savetodatabase ）

如何将此依赖性分开？我不想在测试中调用此方法，请参阅下面的代码：

subscription = githubService.publicRepositories(username)
                .observeOn(AndroidSchedulers.mainThread())
                .subscribeOn(application.defaultSubscribeScheduler())
                .subscribe(new Subscriber<List<Repository>>()
                {
                    @Override
                    public void onCompleted()
                    {
                        progressVisibility.set(View.INVISIBLE);
                        if (!repositories.isEmpty())
                        {
                            recyclerViewVisibility.set(View.VISIBLE);
                        }
                        else
                        {
                            infoMessage.set(context.getString(R.string.text_empty_repos));
                            infoMessageVisibility.set(View.VISIBLE);
                        }
                        //THIS METHOD SHOULD NOT BE CALLED IN MY TEST, I WANT TO VERIFY IT
                        saveToDatabase(MainViewModel.this.repositories);
                    }
                    @Override
                    public void onError(Throwable error)
                    {
                        Log.e(TAG, "Error loading GitHub repos ", error);
                        progressVisibility.set(View.INVISIBLE);
                        if (isHttp404(error))
                        {
                            infoMessage.set(context.getString(R.string.error_username_not_found));
                        }
                        else
                        {
                            infoMessage.set(context.getString(R.string.error_loading_repos));
                        }
                        infoMessageVisibility.set(View.VISIBLE);
                    }
                    @Override
                    public void onNext(List<Repository> repositories)
                    {
                        MainViewModel.this.repositories = repositories;
                    }
                });

这是我的测试：

String username = "usernameWithRepos";
        TextView textView = new TextView(application);
        textView.setText(username);
        List<Repository> mockRepos = MockModelFabric.newListOfRepositories(10);
        doReturn(rx.Observable.just(mockRepos)).when(githubService).publicRepositories(username);
        mainViewModel.onSearchAction(textView, EditorInfo.IME_ACTION_SEARCH, null);
        verify(dataListener).onRepositoriesChanged(mockRepos);
        assertEquals(mainViewModel.infoMessageVisibility.get(), View.INVISIBLE);
        assertEquals(mainViewModel.progressVisibility.get(), View.INVISIBLE);
        assertEquals(mainViewModel.recyclerViewVisibility.get(), View.VISIBLE);

Answer 1

您不能在测试中调用此方法。而是将您的类数据库依赖项添加并模拟它。例如：

//in your class
DataBaseClass databaseClass = new ...
...
dataBaseClass.save(...);
//in your test
@Mock DataBaseClass databaseClass;