public async Task OnGetAsync_GivenResponseReturnsNullWhenFetchingAllocationLines_ReturnsInternalServerError()
{
//Arrange
Specification specification = CreateSpecification();
ApiResponse <Specification> apiResponse = new ApiResponse <Specification>(HttpStatusCode.OK, specification);
ISpecsApiClient specsClient = CreateSpecsApiClient();
specsClient
.GetSpecification(Arg.Is(specificationId))
.Returns(apiResponse);
specsClient
.GetFundingStreamByFundingStreamId(Arg.Is(fundingStreamId))
.Returns((ApiResponse <FundingStream>)null);
CreateCalculationPageModel pageModel = CreatePageModel(specsClient);
//Act
IActionResult result = await pageModel.OnGetAsync(specificationId);
//Assert
result
.Should()
.BeAssignableTo <InternalServerErrorResult>();
}
