public async Task Test_Refresh_Clears_And_Loads_Questions()
{
Site = new SiteViewModel(new Site());
Subject.Questions.Add(new QuestionItemViewModel());
NetworkApi.Questions(
(site, order, sort, page, pagesize, filter) => Task.FromResult(new Response <Question>()
{
Items = new[]
{
new Question()
{
Title = "Test",
Owner = new ShallowUser()
{
ProfileImage = "https://example.com"
}
},
}
}));
await Subject.Refresh.Execute();
Assert.Collection(Subject.Questions,
q => Assert.Equal("Test", q.Title));
}
public async Task Test_LoadQuestions_Does_Reload_If_The_Site_Is_Different_Than_The_Current_Questions()
{
Site = new SiteViewModel(new Site()
{
ApiSiteParameter = "stackoverflow"
});
NetworkApi.Questions((site, order, sort, page, pagesize, filter) =>
{
if (site == "stackoverflow")
{
return(Task.FromResult(new Response <Question>()
{
Items = new[]
{
new Question()
{
Title = "First"
},
}
}));
}
else
{
return(Task.FromResult(new Response <Question>()
{
Items = new[]
{
new Question()
{
Title = "Second"
},
}
}));
}
});
await Subject.LoadQuestions.Execute();
Assert.Collection(Subject.Questions,
q => Assert.Equal("First", q.Title));
Site = new SiteViewModel(new Site()
{
ApiSiteParameter = "other"
});
await Subject.LoadQuestions.Execute();
Assert.Collection(Subject.Questions,
q => Assert.Equal("Second", q.Title));
}
public Task Test_LoadQuestions_Waits_For_LoadSites_To_Finish_Executing_If_No_Site_Is_Selected_But_Is_Already_Executing()
{
// TODO: Clean up test implementation?
var loadSitesTask = new TaskCompletionSource <Unit>();
var testTask = new TaskCompletionSource <int>();
Site = null;
LoadSites = ReactiveCommand.CreateFromTask(() => loadSitesTask.Task);
NetworkApi.Questions(
(site, order, sort, page, pagesize, filter) => Task.FromResult(new Response <Question>()
{
Items = new[]
{
new Question()
{
Owner = new ShallowUser()
{
DisplayName = "Test",
ProfileImage = "http://example.com"
}
},
}
}));
// Act
LoadSites.Execute().Subscribe();
var loadingObservable = Subject.LoadQuestions.Execute();
loadingObservable.Subscribe(u =>
{
try
{
// Assert
Assert.NotEmpty(Subject.Questions);
testTask.SetResult(0);
}
catch (Exception ex)
{
testTask.SetException(ex);
}
}, ex => testTask.SetException(ex));
// Precondition
Assert.Empty(Subject.Questions);
Site = new SiteViewModel();
loadSitesTask.SetResult(Unit.Default);
return(testTask.Task);
}
public async Task Test_LoadQuestions_Executes_LoadSites_If_There_Is_No_Currently_Selected_Site()
{
Site = null;
NetworkApi.Questions((site, order, sort, page, pagesize, filter) => Task.FromResult(new Response <Question>()));
LoadSites = ReactiveCommand.Create(() =>
{
Site = new SiteViewModel();
});
await Subject.LoadQuestions.Execute();
Assert.NotNull(Site);
}
public async Task Test_LoadQuestions_Loads_From_Currently_Selected_Site()
{
var called = false;
Site = new SiteViewModel(new Site()
{
ApiSiteParameter = "stackoverflow"
});
NetworkApi.Questions((site, order, sort, page, pagesize, filter) =>
{
Assert.Equal("stackoverflow", site);
called = true;
return(Task.FromResult(new Response <Question>()));
});
await Subject.LoadQuestions.Execute();
Assert.True(called);
}
private async Task LoadQuestionsImpl()
{
if (Search.SelectedSite == null)
{
if (!await Search.LoadSites.IsExecuting.FirstAsync())
{
await Search.LoadSites.Execute();
}
else
{
await Search.LoadSites.FirstAsync();
}
}
if (!Questions.Any() || Search.SelectedSite.ApiSiteParameter != LoadedSite)
{
LoadedSite = Search.SelectedSite.ApiSiteParameter;
var response = await NetworkApi.Questions(LoadedSite);
var questions = response.Items.Select(q => new QuestionItemViewModel(q)).ToArray();
Questions = new ReactiveList <QuestionItemViewModel>(questions);
}
}
public void Test_Refreshes_Questions_When_Site_Is_Changed_After_Activation()
{
NetworkApi.Questions((site, order, sort, page, pagesize, filter) =>
{
Assert.Equal("othersite", site);
return(Task.FromResult(new Response <Question>()));
});
var api = new StubINetworkApi();
var search = new SearchViewModel(networkApi: api);
Subject = new QuestionsViewModel(search: search, networkApi: NetworkApi);
Subject.Questions.Add(new QuestionItemViewModel());
using (Subject.Activator.Activate())
{
search.SelectedSite = new SiteViewModel(new Site()
{
ApiSiteParameter = "othersite"
});
Assert.Empty(Subject.Questions);
}
}
