#537 updateQuantity.js Backend unit tests

services/loopback/common/methods/sale/specs/updateQuantity.spec.js

@@ -0,0 +1,45 @@
+const app = require(`${servicesDir}/ticket/server/server`);
+
+describe('sale updateQuantity()', () => {
+    it('should throw an error if the quantity is not a number', async() => {
+        let error;
+
+        await app.models.Sale.updateQuantity(1, 'wrong quantity!')
+            .catch(response => {
+                expect(response).toEqual(new Error('The value should be a number'));
+                error = response;
+            });
+
+        expect(error).toBeDefined();
+    });
+
+    it('should throw an error if the quantity is greater than it should be', async() => {
+        let error;
+
+        await app.models.Sale.updateQuantity(1, 99)
+            .catch(response => {
+                expect(response).toEqual(new Error('The new quantity should be smaller than the old one'));
+                error = response;
+            });
+
+        expect(error).toBeDefined();
+    });
+
+    it('should update the quantity of a given sale current line', async() => {
+        let originalLineData = await app.models.Sale.findOne({where: {id: 1}, fields: ['quantity']});
+
+        expect(originalLineData.quantity).toEqual(5);
+
+        await app.models.Sale.updateQuantity(1, 4);
+
+        let modifiedLineData = await app.models.Sale.findOne({where: {id: 1}, fields: ['quantity']});
+
+        expect(modifiedLineData.quantity).toEqual(4);
+
+        await app.models.Sale.update({id: 1}, {quantity: 5});
+
+        let resetLineDataValues = await app.models.Sale.findOne({where: {id: 1}, fields: ['quantity']});
+
+        expect(resetLineDataValues.quantity).toEqual(5);
+    });
+});