public void CheckIfOrganisationStandardAlreadyExistsReturnsAnErrorMessage(bool exists, bool noMessageReturned) { _registerRepository.Setup(r => r.EpaOrganisationStandardExists(It.IsAny <string>(), It.IsAny <int>())) .Returns(Task.FromResult(exists)); var isMessageReturned = _validator.CheckIfOrganisationStandardAlreadyExists("orgId", 5).Length > 0; Assert.AreEqual(noMessageReturned, exists); _registerRepository.Verify(r => r.EpaOrganisationStandardExists(It.IsAny <string>(), It.IsAny <int>()), Times.Once); }