public async Task Return_False_OnCreatesAnArticle_CreateArticleAsync() { var _fileLoggerMock = new Mock <IFileLogger>(); AppDbContext context = DbHelpers.InitContext("TestDB"); var mockCache = new Mock <IMemoryCache>(); var mockCacheEntry = new Mock <ICacheEntry>(); string?keyPayload = null; mockCache .Setup(mc => mc.CreateEntry(It.IsAny <object>())) .Callback((object k) => keyPayload = (string)k) .Returns(mockCacheEntry.Object); object?valuePayload = null; mockCacheEntry .SetupSet(mce => mce.Value = It.IsAny <object>()) .Callback <object>(v => valuePayload = v); TimeSpan?expirationPayload = null; mockCacheEntry .SetupSet(mce => mce.AbsoluteExpirationRelativeToNow = It.IsAny <TimeSpan?>()) .Callback <TimeSpan?>(dto => expirationPayload = dto); var command = new ArticleRepository(context, _fileLoggerMock.Object, mockCache.Object); var exc = await command.CreateArticleAsync(new LikeButton.Core.DTOs.APIRequest.CreateArticleRequest { ArticleUniqueIdentifier = Guid.NewGuid(), Body = "England" }); Assert.True(exc); }