public void GetSession_SessionDoesNotExistInMemory_SessionShouldBeReadFromFile() { var sessionId = "SessionId"; var session = new Session { Begin = DateTime.Now, End = DateTime.Now, Id = sessionId }; dataProvider.AddSession(session); inMemoryStorage.Clear(); var result = subject.GetSession(sessionId); result.Should().NotBeNull(); result.Id.Should().Be(sessionId); }