public async Task GetMostUsedTags_EmptySourceColelction_ReturnEmptyCollection()
{
var tagsProvider = Substitute.For <ITagsProvider <TagModel> >();
tagsProvider.GetMostUsedTags(Arg.Any <int>()).Returns(Task.FromResult(Enumerable.Empty <TagModel>()));
var usagePercentageTagsProvider = new UsagePercentageTagsProvider(tagsProvider);
var tags = await usagePercentageTagsProvider.GetMostUsedTags(1000);
tags.Should().BeEmpty();
}
public async Task GetMostUsedTags_TwoItemsSourceCollection_ReturnTwoItemsCollectionWithPercentageUsage()
{
var sourceCollection =
new List <TagModel>
{
new TagModel("tag1", 20),
new TagModel("tag2", 10)
};
var tagsProvider = Substitute.For <ITagsProvider <TagModel> >();
tagsProvider.GetMostUsedTags(Arg.Any <int>()).Returns(Task.FromResult(sourceCollection.AsEnumerable()));
var usagePercentageTagsProvider = new UsagePercentageTagsProvider(tagsProvider);
var tags = await usagePercentageTagsProvider.GetMostUsedTags(1000);
tags.Should().BeEquivalentTo(new List <ExtendedTagModel>
{
new ExtendedTagModel("tag1", 20, 66.67),
new ExtendedTagModel("tag2", 10, 33.33),
});
}