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fd8ba3c4d2
- Add UnitConverter (normalization, within-family, density tables) - Update cost.py to convert recipe qty to grocery price unit - Update generate.py _load_match_index to fetch ingredient name + unit - Fix orchestrator email/shopping-list cost loops to use conversion - Fix missing Ingredient import in generate.py - Add 19 unit tests
106 lines
3.3 KiB
Python
106 lines
3.3 KiB
Python
"""Tests for app.utils.units."""
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from decimal import Decimal
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import pytest
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from app.utils.units import UnitConverter, convert_qty, normalize_unit
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class TestNormalizeUnit:
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def test_synonyms(self):
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assert normalize_unit("pounds") == "lb"
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assert normalize_unit("OUNCE") == "oz"
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assert normalize_unit("Cups") == "cup"
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assert normalize_unit("TBS") == "tbsp"
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assert normalize_unit("each") == "ea"
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assert normalize_unit("doz") == "dozen"
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def test_already_canonical(self):
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assert normalize_unit("lb") == "lb"
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assert normalize_unit("cup") == "cup"
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assert normalize_unit("ea") == "ea"
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def test_unknown_passthrough(self):
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assert normalize_unit("bunch") == "bunch"
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assert normalize_unit("can") == "can"
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def test_none(self):
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assert normalize_unit(None) == "unknown"
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assert normalize_unit("") == "unknown"
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class TestWithinFamilyConversion:
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def test_weight_lb_to_oz(self):
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assert convert_qty(2.0, "lb", "oz") == Decimal("32")
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def test_weight_oz_to_lb(self):
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result = convert_qty(16.0, "oz", "lb")
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assert result == Decimal("1.0000")
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def test_volume_cup_to_tbsp(self):
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result = convert_qty(1.0, "cup", "tbsp")
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assert result == Decimal("16")
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def test_volume_tbsp_to_tsp(self):
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result = convert_qty(1.0, "tbsp", "tsp")
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assert result == Decimal("3")
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def test_count_dozen_to_ea(self):
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result = convert_qty(1.0, "dozen", "ea")
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assert result == Decimal("12")
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def test_same_unit(self):
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assert convert_qty(5.0, "lb", "lb") == Decimal("5")
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class TestDensityConversion:
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def test_olive_oil_tbsp_to_cup(self):
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# 1 cup = 16 tbsp
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result = convert_qty(
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1.0, "cup", "tbsp", ingredient_name_lower="olive oil"
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)
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assert result == Decimal("16")
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def test_rice_cup_to_lb(self):
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# 1 cup rice = 185 g; 1 lb = 453.592 g → 1 cup = 185/453.592 ≈ 0.4079 lb
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result = convert_qty(
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1.0, "cup", "lb", ingredient_name_lower="rice, long-grain white"
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)
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assert result == Decimal("0.4079")
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def test_butter_tbsp_to_cup(self):
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result = convert_qty(
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1.0, "cup", "tbsp", ingredient_name_lower="butter, unsalted"
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)
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assert result == Decimal("16")
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def test_seed_size_ea_to_lb(self):
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# 1 avocado ≈ 170 g = 0.3748 lb
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result = convert_qty(
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1.0, "ea", "lb", ingredient_name_lower="avocado"
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)
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assert result == Decimal("0.3748")
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def test_unknown_density_falls_back(self):
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# No density for "dragon fruit" → fallback to dimensionless qty
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result = convert_qty(2.0, "cup", "lb", ingredient_name_lower="dragon fruit")
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assert result == Decimal("2")
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class TestFallback:
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def test_incommensurable_units_without_name(self):
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result = convert_qty(2.0, "cup", "lb")
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assert result == Decimal("2")
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def test_incommensurable_units_with_unmapped_name(self):
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result = convert_qty(2.0, "cup", "lb", ingredient_name_lower="xyz")
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assert result == Decimal("2")
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def test_missing_from_unit(self):
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result = convert_qty(2.0, None, "lb")
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assert result == Decimal("2")
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def test_missing_to_unit(self):
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result = convert_qty(2.0, "lb", None)
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assert result == Decimal("2")
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