I have been tasked at work to create a test script that will (using entity framework) look-up a value in a table if existing.
The code I have to work with has this constructor:
public PostProductHelper(
Func<IMachineDBContext> contextFactory )
{
_contextFactory = contextFactory;
}
My method to unit test could be something like this:
public string CheckAndRemoveProductNameFileExtIfExists(
string productName )
{
using ( var ctx = CreateContext() )
{
return ctx.Products.FirstOrDefault( d => d.Name == productName);
}
}
so, going by the examples when Googling I am supposed to do this:
MockProductRepository = Substitute.For<IProductRepository>();
MockMessagePublicationService = Substitute.For<IMessagePublicationService>();
MockMachineDBContext = Substitute.For<IMachineDBContext>(););
var Products = new List<Product>
{
new Product { Name = "BBB" },
new Product { Name = "ZZZ" },
new Product { Name = "AAA" },
}.AsQueryable();
MockMachineDBContext.Products.AddRange( Products );
But in order to pass to my constructor I have to modify this to:
MockProductRepository = Substitute.For<IProductRepository>();
MockMessagePublicationService = Substitute.For<IMessagePublicationService>();
MockMachineDBContext = Substitute.For<Func<IMachineDBContext>>();
var Products = new List<Product>
{
new Product { Name = "BBB" },
new Product { Name = "ZZZ" },
new Product { Name = "AAA" },
}.AsQueryable();
MockMachineDBContext.Products.AddRange( Products );
which errors on the last line saying 'cannot resolve symbol 'Products'.
I am not allowed to change this constructor and I appreciate I may be making some mistakes.
You are missing () after MockMachineDBContext
in MockMachineDBContext().Products.AddRange( Products );
MockMachineDBContext is delegate. For usage also see Substituting for delegates in NSubstitute .
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