public async Task ShouldHashRequest(HashRequestModel requestModel)
{
//arrange
string validationMessage = "Validation Successful";
_reqValidation.Setup(u => u.ValidateLoginRequest(requestModel, out validationMessage))
.Returns(true);
_funcService.Setup(u => u.Hash(It.IsAny <HashRequestModel>()))
.Returns(() => Task.FromResult(responseModel));
//act
var response = await _hashManager.HashAsync(requestModel);
//assert
_reqValidation.Verify(u => u.ValidateLoginRequest(It.IsAny <HashRequestModel>(), out validationMessage), Times.Once);
_funcService.Verify(u => u.Hash(It.IsAny <HashRequestModel>()), Times.Once);
Assert.NotNull(response);
Assert.NotNull(response.hash_value);
}