feat(backend): add Open Food Facts service with Redis caching

- transformOFFProduct: maps OFF products to unified Product model - searchBabyProducts: searches baby products via OFF API (1h cache) - getBabyProductDetails: fetches product details by barcode (1h cache) - 9 tests passing for transform logic and input validation
2026-07-13 15:10:46 +02:00
parent 484220a0f6
commit e48ef31fee
2 changed files with 231 additions and 0 deletions
@@ -0,0 +1,92 @@
+import { transformOFFProduct, searchBabyProducts, getBabyProductDetails } from '../off-service.js';
+
+describe('transformOFFProduct', () => {
+  test('transforms a valid OFF product to unified model', () => {
+    const offProduct = {
+      _id: '12345',
+      product_name: 'Baby Rice',
+      brands: 'Nestlé',
+      image_url: 'https://example.com/image.jpg',
+      nutriscore_grade: 'a',
+      ingredients_text: 'Rice, Iron, Vitamins',
+      nova_group: 1,
+      ecoscore_grade: 'b',
+      categories_tags: ['en:baby-foods', 'en:baby-rice'],
+    };
+
+    const result = transformOFFProduct(offProduct);
+
+    expect(result).toEqual({
+      id: '12345',
+      source: 'openfoodfacts',
+      name: 'Baby Rice',
+      brand: 'Nestlé',
+      category: 'baby_food',
+      image_url: 'https://example.com/image.jpg',
+      nutriscore: 'a',
+      ingredients: 'Rice, Iron, Vitamins',
+      nova_group: 1,
+      eco_score: 'b',
+    });
+  });
+
+  test('returns null for null/undefined input', () => {
+    expect(transformOFFProduct(null)).toBeNull();
+    expect(transformOFFProduct(undefined)).toBeNull();
+  });
+
+  test('returns null when missing required fields', () => {
+    expect(transformOFFProduct({ _id: '123' })).toBeNull();
+    expect(transformOFFProduct({ product_name: 'Test' })).toBeNull();
+  });
+
+  test('sets default brand to empty string when missing', () => {
+    const result = transformOFFProduct({
+      _id: '999',
+      product_name: 'Plain Product',
+    });
+    expect(result.brand).toBe('');
+    expect(result.image_url).toBeNull();
+    expect(result.nutriscore).toBeNull();
+    expect(result.ingredients).toBeNull();
+    expect(result.nova_group).toBeNull();
+    expect(result.eco_score).toBeNull();
+  });
+
+  test('detects baby_milk category from tags', () => {
+    const result = transformOFFProduct({
+      _id: '200',
+      product_name: 'Infant Formula',
+      categories_tags: ['en:infant-milk'],
+    });
+    expect(result.category).toBe('baby_milk');
+  });
+
+  test('detects baby_cereal category from tags', () => {
+    const result = transformOFFProduct({
+      _id: '300',
+      product_name: 'Baby Cereal',
+      categories_tags: ['en:baby-cereals'],
+    });
+    expect(result.category).toBe('baby_cereal');
+  });
+});
+
+describe('searchBabyProducts', () => {
+  test('returns empty array for short query', async () => {
+    const result = await searchBabyProducts('a');
+    expect(result).toEqual([]);
+  });
+
+  test('returns empty array for null/empty query', async () => {
+    expect(await searchBabyProducts(null)).toEqual([]);
+    expect(await searchBabyProducts('')).toEqual([]);
+  });
+});
+
+describe('getBabyProductDetails', () => {
+  test('returns null for null barcode', async () => {
+    const result = await getBabyProductDetails(null);
+    expect(result).toBeNull();
+  });
+});