public void ShouldRemoveAllFromFavouritesCollection() { // Arrange var cookies = new FakeCookie(true); httpContextAccessor.Setup(_ => _.HttpContext.Request.Cookies).Returns(cookies); httpContextAccessor.Setup(_ => _.HttpContext.Response.Cookies).Returns(cookies); // Act cookiesHelper.RemoveAllFromCookies <Group>("favourites"); var result = JsonConvert.DeserializeObject <Dictionary <string, List <string> > >(cookies["favourites"]); // Assert result.ContainsKey(typeof(Group).ToString()).Should().Be(false); }