public void DeleteMeal()
{
MealCategory toDelete = ctx.MealCategorySet.FirstOrDefault(p => p.Label == "meal category 1");
repo.Delete(toDelete);
repo.Save();
Assert.IsNull(ctx.MealCategorySet.FirstOrDefault(p => p.Label == "meal category 1"));
Assert.IsNotNull(ctx.MealSet.FirstOrDefault(p => p.Title == "Meal1"));
}
