def test_ingredient_string(self):
"""Format Ingredient as a string.
"""
pancakes = Recipe.objects.get(name='Pancakes')
egg = Food.objects.get(name='egg')
butter = Food.objects.get(name='butter')
ounce = Unit.objects.get(name='ounce')
beaten, created = Preparation.objects.get_or_create(name='beaten')
melted, created = Preparation.objects.get_or_create(name='melted')
# quantity == 1
eggs = Ingredient(recipe=pancakes, quantity=1, food=egg)
self.assertEqual(str(eggs), '1 egg')
# quantity > 1
eggs.quantity = 2
self.assertEqual(str(eggs), '2 eggs')
# with preparation
eggs.preparation = beaten
self.assertEqual(str(eggs), '2 eggs, beaten')
# with preparation, and optional
eggs.optional = True
self.assertEqual(str(eggs), '2 eggs, beaten (optional)')
# Ingredient with units
# quantity == 1
ounces_butter = Ingredient(recipe=pancakes, quantity=1, unit=ounce, food=butter)
self.assertEqual(str(ounces_butter), '1 ounce butter')
# quantity > 1
ounces_butter.quantity = 8
self.assertEqual(str(ounces_butter), '8 ounces butter')
# optional
ounces_butter.optional = True
self.assertEqual(str(ounces_butter), '8 ounces butter (optional)')
# optional, with preparation
ounces_butter.preparation = melted
self.assertEqual(str(ounces_butter), '8 ounces butter, melted (optional)')
def test_ingredient_nutrition_info_recalculation(self):
"""Recalculate IngredientNutritionInfo on save.
"""
egg = Food.objects.get(name='egg')
pancakes = Recipe.objects.get(name='Pancakes')
# Create an ingredient
eggs = Ingredient(recipe=pancakes, quantity=2, food=egg)
eggs.save()
egg_NI = FoodNutritionInfo.objects.get(food=egg, quantity=1, unit=None)
# Nutrition info should equal 2 eggs
total_NI = egg_NI * 2.0
self.assertTrue(eggs.nutrition_info.is_equal(total_NI))
# Make it 3 eggs
eggs.quantity = 3
eggs.save()
# Ensure nutrition reflects 3 eggs now
total_NI = egg_NI * 3.0
self.assertTrue(eggs.nutrition_info.is_equal(total_NI))