public void Active_Should_Throw_ArgumentNullException_If_Brands_Is_Null()
{
IQueryable <Brand> brands = null;
var ex = Assert.Throws <ArgumentNullException>(() => BrandExtensions.Active(brands));
Assert.Equal(nameof(brands), ex.ParamName);
}
public void Active_Should_Return_Only_Brands_Not_Deleted()
{
var brand1 = Brand.Create("b1", "b1");
var brand2 = Brand.Create("b2", "b2");
var brand3 = Brand.Create("b3", "b3");
brand3.Delete();
IQueryable <Brand> brands = new Brand[]
{
brand1, brand2, brand3
}.AsQueryable();
var activeBrands = BrandExtensions.Active(brands).ToArray();
Assert.True(activeBrands.All(b => !b.Deleted));
}