public async Task Given_CollectionPage_It_Stops_Iterating_Across_Pages()
{
// Create the 17 events to initiallize the original collection page.
List <Event> testEvents = new List <Event>();
int inputEventCount = 17;
for (int i = 0; i < inputEventCount; i++)
{
testEvents.Add(new Event()
{
Subject = $"Subject{i.ToString()}"
});
}
// Create the 5 events to initialize the next collection page.
UserEventsCollectionPage nextPage = new UserEventsCollectionPage();
int nextPageEventCount = 5;
for (int i = 0; i < nextPageEventCount; i++)
{
nextPage.Add(new Event()
{
Subject = $"Subject for next page events: {i.ToString()}"
});
}
// Create the CancellationTokenSource to test the cancellation of paging in the delegate.
CancellationTokenSource cancellationTokenSource = new CancellationTokenSource();
var pagingToken = cancellationTokenSource.Token;
// Create the delegate to process each entity returned in the pages. The delegate will cancel
// paging when the target subject is encountered.
Func <Event, bool> processEachEvent = (e) =>
{
bool shouldContinue = true;
if (e.Subject.Contains("Subject3"))
{
cancellationTokenSource.Cancel();
}
if (e.Subject.Contains("Subject for next page events"))
{
Assert.True(false, "Unexpectedly paged the next page of results.");
}
return(shouldContinue);
};
Mocks.MockUserEventsCollectionRequest mockUserEventsCollectionRequest = new Mocks.MockUserEventsCollectionRequest(nextPage);
var mockUserEventsCollectionPage = new Mocks.MockUserEventsCollectionPage(testEvents, mockUserEventsCollectionRequest) as IUserEventsCollectionPage;
eventPageIterator = PageIterator <Event> .CreatePageIterator(graphClient, mockUserEventsCollectionPage, processEachEvent);
await eventPageIterator.IterateAsync(pagingToken);
Assert.True(cancellationTokenSource.IsCancellationRequested, "The delegate page iterator did not cancel requests to fetch more pages.");
}
public async Task Given_CollectionPage_It_Iterates_Across_Pages()
{
// Create the 17 events to initiallize the original collection page.
List <Event> originalCollectionPageEvents = new List <Event>();
int inputEventCount = 17;
for (int i = 0; i < inputEventCount; i++)
{
originalCollectionPageEvents.Add(new Event()
{
Subject = $"Subject{i.ToString()}"
});
}
// Create the 5 events to initialize the next collection page.
UserEventsCollectionPage nextPage = new UserEventsCollectionPage();
int nextPageEventCount = 5;
for (int i = 0; i < nextPageEventCount; i++)
{
nextPage.Add(new Event()
{
Subject = $"Subject for next page events: {i.ToString()}"
});
}
nextPage.AdditionalData = new Dictionary <string, object>();
bool reachedNextPage = false;
// Create the delegate to process each entity returned in the pages. The delegate will
// signal that we reached an event in the next page.
Func <Event, bool> processEachEvent = (e) =>
{
if (e.Subject.Contains("Subject for next page events"))
{
reachedNextPage = true;
return(false);
}
return(true);
};
Mocks.MockUserEventsCollectionRequest mockUserEventsCollectionRequest = new Mocks.MockUserEventsCollectionRequest(nextPage);
var mockUserEventsCollectionPage = new Mocks.MockUserEventsCollectionPage(originalCollectionPageEvents, mockUserEventsCollectionRequest, "nextLink") as IUserEventsCollectionPage;
eventPageIterator = PageIterator <Event> .CreatePageIterator(graphClient, mockUserEventsCollectionPage, processEachEvent);
await eventPageIterator.IterateAsync();
Assert.True(reachedNextPage, "The delegate page iterator did not reach the next page.");
Assert.Equal(PagingState.Paused, eventPageIterator.State);
}
public void Given_PageIterator_It_Has_PagingState_NotStarted()
{
// Arrange
List <Event> originalCollectionPageEvents = new List <Event>();
UserEventsCollectionPage nextPage = new UserEventsCollectionPage();
Mocks.MockUserEventsCollectionRequest mockUserEventsCollectionRequest = new Mocks.MockUserEventsCollectionRequest(nextPage);
var mockUserEventsCollectionPage = new Mocks.MockUserEventsCollectionPage(originalCollectionPageEvents, mockUserEventsCollectionRequest, "nextlink") as IUserEventsCollectionPage;
// Act
eventPageIterator = PageIterator <Event> .CreatePageIterator(graphClient, mockUserEventsCollectionPage, (e) => { return(true); });
// Assert
Assert.Equal <PagingState>(PagingState.NotStarted, eventPageIterator.State);
}
public async Task Given_RequestConfigurator_It_Is_Invoked()
{
// Create the 17 events to initiallize the original collection page.
List <Event> originalCollectionPageEvents = new List <Event>();
int inputEventCount = 17;
for (int i = 0; i < inputEventCount; i++)
{
originalCollectionPageEvents.Add(new Event()
{
Subject = $"Subject{i.ToString()}"
});
}
// Create the 5 events to initialize the next collection page.
UserEventsCollectionPage nextPage = new UserEventsCollectionPage();
int nextPageEventCount = 5;
for (int i = 0; i < nextPageEventCount; i++)
{
nextPage.Add(new Event()
{
Subject = $"Subject for next page events: {i.ToString()}"
});
}
nextPage.AdditionalData = new Dictionary <string, object>();
// Create the delegate to process each entity returned in the pages.
Func <Event, bool> processEachEvent = (e) => { return(true); };
// Create the delegate to configure the next page request. The delegate will signal that it was invoked.
bool requestConfiguratorInvoked = false;
Func <IBaseRequest, IBaseRequest> requestConfigurator = (request) =>
{
requestConfiguratorInvoked = true;
return(request);
};
Mocks.MockUserEventsCollectionRequest mockUserEventsCollectionRequest = new Mocks.MockUserEventsCollectionRequest(nextPage);
var mockUserEventsCollectionPage = new Mocks.MockUserEventsCollectionPage(originalCollectionPageEvents, mockUserEventsCollectionRequest, "nextLink") as IUserEventsCollectionPage;
eventPageIterator = PageIterator <Event> .CreatePageIterator(graphClient, mockUserEventsCollectionPage, processEachEvent, requestConfigurator);
await eventPageIterator.IterateAsync();
Assert.True(requestConfiguratorInvoked, "The delegate request configurator not invoked.");
}
public async Task Given_CollectionPage_It_Detects_Nextlink_Loop()
{
// Create the 17 events to initiallize the original collection page.
List <Event> originalCollectionPageEvents = new List <Event>();
int inputEventCount = 5;
for (int i = 0; i < inputEventCount; i++)
{
originalCollectionPageEvents.Add(new Event()
{
Subject = $"Subject{i.ToString()}"
});
}
// Create the 5 events to initialize the next collection page.
UserEventsCollectionPage nextPage = new UserEventsCollectionPage();
int nextPageEventCount = 5;
for (int i = 0; i < nextPageEventCount; i++)
{
nextPage.Add(new Event()
{
Subject = $"Subject for next page events: {i.ToString()}"
});
}
// This will be the same nextLink value as the one set in MockUserEventsCollectionPage cstor.
nextPage.AdditionalData = new Dictionary <string, object>()
{
{ Constants.OdataInstanceAnnotations.NextLink, "testNextlink" }
};
// Create the delegate to process each entity returned in the pages. The delegate will
// signal that we reached an event in the next page.
Func <Event, bool> processEachEvent = (e) =>
{
return(true);
};
Mocks.MockUserEventsCollectionRequest mockUserEventsCollectionRequest = new Mocks.MockUserEventsCollectionRequest(nextPage);
var mockUserEventsCollectionPage = new Mocks.MockUserEventsCollectionPage(originalCollectionPageEvents, mockUserEventsCollectionRequest, "nextLink") as IUserEventsCollectionPage;
eventPageIterator = PageIterator <Event> .CreatePageIterator(graphClient, mockUserEventsCollectionPage, processEachEvent);
await Assert.ThrowsAsync <ServiceException>(async() => await eventPageIterator.IterateAsync());
}
public async Task Given_CollectionPage_It_Handles_Empty_NextPage()
{
try
{
// Create the 17 events to initiallize the original collection page.
List <Event> originalCollectionPageEvents = new List <Event>();
int inputEventCount = 17;
for (int i = 0; i < inputEventCount; i++)
{
originalCollectionPageEvents.Add(new Event()
{
Subject = $"Subject{i.ToString()}"
});
}
// Create empty next collection page.
UserEventsCollectionPage nextPage = new UserEventsCollectionPage();
// Create the delegate to process each entity returned in the pages.
Func <Event, bool> processEachEvent = (e) =>
{
return(true);
};
Mocks.MockUserEventsCollectionRequest mockUserEventsCollectionRequest = new Mocks.MockUserEventsCollectionRequest(nextPage);
var mockUserEventsCollectionPage = new Mocks.MockUserEventsCollectionPage(originalCollectionPageEvents, mockUserEventsCollectionRequest) as IUserEventsCollectionPage;
eventPageIterator = PageIterator <Event> .CreatePageIterator(graphClient, mockUserEventsCollectionPage, processEachEvent);
await eventPageIterator.IterateAsync();
}
catch (Exception)
{
Assert.True(false, "Unexpected exception occurred when next page contains no elements.");
}
}