back test for getComponentsSum

modules/ticket/back/methods/ticket/getComponentsSum.js

@@ -20,11 +20,11 @@ module.exports = Self => {
     });
     Self.getComponentsSum = async id => {
         const models = Self.app.models;
-        let sales = await models.Sale.find({where: {ticketFk: id}});
-        let components = await models.Component.find();
         let salesComponents = [];
         let componentsSum = [];
-
+        let sales = await models.Sale.find({where: {ticketFk: id}});
+        let components = await models.Component.find();
+        if (sales.length > 0) {
             for (let sale of sales) {
                 let myComponents = await models.SaleComponent.find({where: {saleFk: sale.id}});
                 salesComponents = salesComponents.concat(myComponents);
@@ -47,6 +47,7 @@ module.exports = Self => {
 
                 return acumulator;
             });
+        }
         return componentsSum;
     };
 };

modules/ticket/back/methods/ticket/specs/getComponentsSum.spec.js

@@ -0,0 +1,18 @@
+const app = require('vn-loopback/server/server');
+
+fdescribe('ticket getComponentsSum()', () => {
+    it('should get the list of component of their sales of a given ticket', async() => {
+        let ticketId = 7;
+        let mana = await app.models.Ticket.getComponentsSum(ticketId);
+
+        expect(mana.length).toBeGreaterThan(0);
+        expect(mana[0].componentFk).toBe(22);
+    });
+
+    it('should return 0 if the given ticket does not have sales', async() => {
+        let ticketWithoutSales = 21;
+        let mana = await app.models.Ticket.getComponentsSum(ticketWithoutSales);
+
+        expect(mana.length).toEqual(0);
+    });
+});