Done some test runs

exercises/07_unit_testing/todo/modules/todo.js

@@ -10,7 +10,16 @@ module.exports.clear = () => {
 module.exports.add = (item, qty) => {
 	qty = Number(qty)
 	if(isNaN(qty)) throw new Error('the quantity must be a number')
-	data.push({item: item, qty: qty})
+	let flag = false
+	for(let i in data){
+		if (data[i].item === item){
+			data[i].qty+=qty
+			flag = true
+		}
+	}
+	if(flag === false ) {
+		data.push({item: item, qty: qty})
+	}
 }
 
 module.exports.getAll = () => {

exercises/07_unit_testing/todo/unit tests/todo.spec.js

@@ -41,7 +41,23 @@ describe('add()', () => {
 			done()
 		}
 	})
-
+	test('same item must combine', async done => {
+		expect.assertions(2)
+		try {
+			//act
+			todo.add('bread', 3)
+			todo.add('bread', 5)
+			//assert
+			expect(todo.countItems()).toBe(1)
+			const data = todo.getAll()
+			const qty = data[0].qty
+			expect(qty).toEqual(8)
+		} catch(err) {
+			done.fail(err)
+		} finally {
+			done()
+		}
+	})
 	// New test goes HERE!
 
 })