tests: add tests for IngredientsServices

LeftOvers/__tests__/IngredientsServices.test.ts

@@ -4,8 +4,35 @@ describe('IngredientService', () => {
     const ingredient_service = new IngredientService();
 
     it('should get one ingredient', async () => {
-        const ingredient_service = new IngredientService();
         const result = await ingredient_service.getIngredientById(1)
         expect(result.id).toBe(1);
     });
+
+    it('should get all ingredients', async () => {
+        const result = await ingredient_service.getAllIngredient()
+        const test = result.length >= 1
+        expect(test).toBe(true);
+    });
+
+    it('should return several ingredients starting by letter a', async () => {
+        const result = await ingredient_service.getIngredientByLetter('a')
+        let test = true
+        for (let ingredient of result) {
+            if (ingredient.name[0] !== 'a') {
+                test = false
+            }
+        }
+        expect(test).toBe(true);
+    });
+
+    it('should return several ingredients with car in the name', async () => {
+        const result = await ingredient_service.getfilteredIngredient('car')
+        let test = true
+        for (let ingredient of result) {
+            if (ingredient.name.includes('car')) {
+                test = false
+            }
+        }
+        expect(test).toBe(true);
+    });
 });