Mock method with Expression as parameter.

[balajis-13395]

Hi,
I have the to mock Method with expression or predicate as parameter

I need to mock the this.catalogueRepository.GetAsync(predicate).ConfigureAwait(false); in the below method

public async Task AddProductDetails(int a)
{
Expression<Func<Catalogue, bool>> predicate = a => a.ParentId == viewModel.VendorId &&
a.GlobalKey == EYConstants.GlobalKeys.Product &&
!a.IsDeleted &&
a.GlobalValue.ToLower() == viewModel.ProductName.ToLower().Trim();

var data = await this.catalogueRepository.GetAsync(predicate).ConfigureAwait(false);
return data;

}
I tried to mock the this.catalogueRepository.GetAsync method in the below approach. But it returns null all the time.

Xunit test.

[Fact]
public async Task AddProductDetails_ReturnResult_WhenInputIsValid()
{
#region Arrange
var viewModel = GetAddProductRequest();
var vendorDetail = GetVendorDetail();
var response = GetAddProductResponse();
Expression<Func<Catalogue, bool>> predicate = a => a.ParentId == viewModel.VendorId &&
a.GlobalKey == EYConstants.GlobalKeys.Product &&
!a.IsDeleted &&
a.GlobalValue.ToLower() == viewModel.ProductName.ToLower().Trim();
#endregion

#region Act
//Mocking the method with expression as parameter.
this.MockCatalogueRepository.Setup(x => x.GetAsync(predicate).ReturnsAsync(vendorDetail);

var result = await manager.AddProductDetails(viewModel);
#endregion

#region Assert
Assert.NotNull(result);
Assert.IsType<string>(result);
Assert.Equal(response, result);
#endregion

}

[stakx]

This issue tracker focuses on Moq development. This issue doesn't look like a bug report, nor like a feature request, but like a simple usage question. Places like Stack Overflow are perhaps better suited for such questions as they will reach a larger audience.