public async Task NextPage_ShouldThrowIfAlreadyCompletedAsync()
{
// arrange
var iterator = new MultiLevelCursorIterator <long, IUserIdentifier, string>(_getPageFunc, _getUserIdentifiersFunc);
// act
await iterator.NextPageAsync();
await iterator.NextPageAsync();
await iterator.NextPageAsync();
// act assert
await Assert.ThrowsAsync <TwitterIteratorAlreadyCompletedException>(() => iterator.NextPageAsync());
}
public async Task NextPage_ShouldIterateBothAtParentChildLevelAsync()
{
// arrange
var iterator = new MultiLevelCursorIterator <long, IUserIdentifier, string>(_getPageFunc, _getUserIdentifiersFunc);
// act
var firstPage = await iterator.NextPageAsync();
var secondPage = await iterator.NextPageAsync();
var thirdPage = await iterator.NextPageAsync();
// assert
Assert.Equal(firstPage.Items, _page1ProcessingResult.Items);
Assert.False(firstPage.IsLastPage);
Assert.Equal(secondPage.Items, _page2FirstProcessingResult.Items);
Assert.False(secondPage.IsLastPage);
Assert.Equal(thirdPage.Items, _page2SecondProcessingResult.Items);
Assert.True(thirdPage.IsLastPage);
Assert.True(iterator.Completed);
}
