public async Task LoadPageAsync_should_return_empty_first_page_for_empty_data()
{
var theCase = new EntityListCase();
var page = await theCase.EntityList.Paging(3).LoadPageAsync(0);
page.Should().BeEmpty();
}
public void Paging_should_fail_when_given_zero_page_size()
{
var theCase = new EntityListCase();
Action action = () => theCase.EntityList.Paging(0);
action.Should().Throw <ArgumentException>();
}
public async Task LoadAllAsync_should_return_empty_list_when_there_is_no_data()
{
var theCase = new EntityListCase();
var allItems = await theCase.EntityList.SliceBy(3).LoadAllAsync();
allItems.Should().BeEmpty();
theCase.DataLoadCount.Should().Be(1);
}
public void Skip_should_fail_when_given_negative_skip_elements()
{
var theCase = new EntityListCase()
.MakeDataAvailable(100);
Action action = () => theCase.EntityList.SliceBy(10).Skip(-1);
action.Should().Throw <ArgumentException>();
}
public async Task LoadPageAsync_should_fail_when_given_negative_page_index()
{
var theCase = new EntityListCase()
.MakeDataAvailable(100);
Func <Task> action = async() => await theCase.EntityList.Paging(3).LoadPageAsync(-1);
await action.Should().ThrowAsync <ArgumentException>();
}
public async Task LoadSliceAsync_should_return_empty_slice_when_there_is_no_data()
{
var theCase = new EntityListCase();
var slice = await theCase.EntityList.SliceBy(10).LoadSliceAsync();
slice.Items.Should().BeEmpty();
slice.HasNextSlice.Should().BeFalse();
slice.TotalItems.Should().Be(0);
}
public async Task LoadSliceAsync_should_return_empty_slice_when_given_empty_slice_size()
{
var theCase = new EntityListCase()
.MakeDataAvailable(100);
var slice = await theCase.EntityList.SliceBy(0).LoadSliceAsync();
slice.Items.Should().BeEmpty();
slice.HasNextSlice.Should().BeFalse();
slice.TotalItems.Should().Be(100);
}
public async Task LoadPageAsync_should_load_intermediate_page()
{
var theCase = new EntityListCase()
.MakeDataAvailable(100);
var expectedPageData = theCase.GetExpectedPageData(10, 3);
var page = await theCase.EntityList.Paging(3).LoadPageAsync(10);
page.Should().BeEquivalentTo(expectedPageData);
page.TotalPages.Should().Be(34);
}
public async Task LoadPageAsync_should_return_non_existent_page_if_page_index_is_too_big()
{
var theCase = new EntityListCase()
.MakeDataAvailable(100);
const int lastPageIndex = 33;
var page = await theCase.EntityList.Paging(3).LoadPageAsync(lastPageIndex + 1);
page.Should().BeEmpty();
page.CurrentPage.Should().Be(34);
page.TotalPages.Should().Be(34);
}
public async Task LoadPageAsync_should_load_last_page()
{
var theCase = new EntityListCase()
.MakeDataAvailable(100);
const int lastPageIndex = 33;
var expectedPageData = theCase.GetExpectedPageData(lastPageIndex, 3);
var page = await theCase.EntityList.Paging(3).LoadPageAsync(lastPageIndex);
page.Should().BeEquivalentTo(expectedPageData);
page.TotalPages.Should().Be(34);
}
public async Task LoadAllAsync_should_load_all_items_by_slices()
{
var theCase = new EntityListCase()
.MakeDataAvailable(100);
const int sliceCount = 34;
var expectedItems = theCase.AllData;
var allItems = await theCase.EntityList.SliceBy(3).LoadAllAsync();
allItems.Should().BeEquivalentTo(expectedItems);
theCase.DataLoadCount.Should().Be(sliceCount);
}
public async Task LoadSliceAsync_should_return_last_slice()
{
var theCase = new EntityListCase()
.MakeDataAvailable(100);
var expectedSliceData = theCase.GetExpectedSliceData(91, 9);
var slice = await theCase.EntityList.SliceBy(10).Skip(91).LoadSliceAsync();
slice.Items.Should().BeEquivalentTo(expectedSliceData);
slice.HasNextSlice.Should().BeFalse();
slice.TotalItems.Should().Be(100);
}
public async Task LoadSliceAsync_should_return_first_slice_by_specifying_zero_skipped_items()
{
var theCase = new EntityListCase()
.MakeDataAvailable(100);
var expectedSliceData = theCase.GetExpectedSliceData(0, 10);
var slice = await theCase.EntityList.SliceBy(10).Skip(0).LoadSliceAsync();
slice.Items.Should().BeEquivalentTo(expectedSliceData);
slice.HasNextSlice.Should().BeTrue();
slice.TotalItems.Should().Be(100);
}