public void VariantsOf_Should_Throw_ArgumentException_If_ProductId_Is_Empty()
{
IQueryable <Product> products = new Product[0].AsQueryable();
Guid productId = Guid.Empty;
var ex = Assert.Throws <ArgumentException>(() => ProductExtensions.VariantsOf(products, productId));
Assert.Equal(nameof(productId), ex.ParamName);
}
public void VariantsOf_Should_Throw_ArgumentNullException_If_Products_Is_Null()
{
IQueryable <Product> products = null;
Guid productId = Guid.NewGuid();
var ex = Assert.Throws <ArgumentNullException>(() => ProductExtensions.VariantsOf(products, productId));
Assert.Equal(nameof(products), ex.ParamName);
}