public void Active_Should_Throw_ArgumentNullException_If_Categories_Is_Null()
{
IQueryable<Category> categories = null;
var ex = Assert.Throws<ArgumentNullException>(() => CategoryExtensions.Active(categories));
Assert.Equal(nameof(categories), ex.ParamName);
}
public void Active_Should_Return_Only_Categories_Not_Deleted()
{
var c1 = Category.Create("c1", "c1", "c1");
var c2 = Category.Create("c2", "c2", "c2");
var c3 = Category.Create("c3", "c3", "c3");
c3.Delete();
IQueryable<Category> categories = new Category[]
{
c1, c2, c3
}.AsQueryable();
var activeCategories = CategoryExtensions.Active(categories).ToArray();
Assert.True(activeCategories.All(c => !c.Deleted));
}