public void Invoke_SaveChanges_When_TweetTag_Exists()
{
//Arrange
var fakeUnit = new Mock <IUnitOfWork>();
var fakeDateTimeProvider = Mock.Of <IDateTimeProvider>();
var fakeTagService = Mock.Of <ITagService>();
var sut = new TweetTagService(fakeUnit.Object, fakeTagService, fakeDateTimeProvider);
var fakeTweetTagRepo = new Mock <IGenericRepository <TweetTag> >();
var tweetTag = new TweetTag {
TweetId = "TestTweetId1", TagId = 1
};
var tweetTagsCollection = new List <TweetTag> {
tweetTag
};
fakeTweetTagRepo.Setup(r => r.All).Returns(tweetTagsCollection.AsQueryable());
fakeUnit.Setup(u => u.TweetTags).Returns(fakeTweetTagRepo.Object);
fakeUnit.Setup(s => s.SaveChanges()).Verifiable();
//Act
sut.DeleteTweetTag(tweetTag.TagId, tweetTag.TweetId);
//Assert
fakeUnit.Verify(v => v.SaveChanges(), Times.Once);
}
public void Throw_Argument_Null_Exception_When_String_Is_Null()
{
//Arrange
var fakeUnit = Mock.Of <IUnitOfWork>();
var fakeDateTimeProvider = Mock.Of <IDateTimeProvider>();
var fakeTagService = Mock.Of <ITagService>();
var sut = new TweetTagService(fakeUnit, fakeTagService, fakeDateTimeProvider);
//Act & Assert
Assert.ThrowsException <ArgumentNullException>(() => sut.DeleteTweetTag(5, null));
}