Merge branch 'test'

cmd/utils/calculate-utils.go

@@ -55,10 +55,7 @@ func (u *Utils) ConcurrentCalculatePoints(retailer, purchaseDate, purchaseTime,
 	wg.Wait()
 
 	// Calculate total points of the receipt
-	var totalPoints int
-	for _, point := range points {
-		totalPoints += point
-	}
+	totalPoints := u.sum(points)
 
 	return totalPoints, nil
 }
@@ -83,10 +80,7 @@ func (u *Utils) CalculatePoints(retailer, purchaseDate, purchaseTime, total stri
 	}
 
 	// Calculate total points of the receipt
-	var totalPoints int
-	for _, point := range points {
-		totalPoints += point
-	}
+	totalPoints := u.sum(points)
 
 	return totalPoints, nil
 }
@@ -227,3 +221,11 @@ func (u *Utils) getPurchaseTimePoints(purchaseTime string) int {
 
 	return points
 }
+
+func (u *Utils) sum(points []int) int {
+	var totalPoints int
+	for _, point := range points {
+		totalPoints += point
+	}
+	return totalPoints
+}

cmd/utils/calculate-utils_test.go

@@ -197,3 +197,28 @@ func Test_getPurchaseTimePoints(t *testing.T) {
 		})
 	}
 }
+
+func Test_sum(t *testing.T) {
+	var utils *Utils
+	tests := []struct {
+		name     string
+		nums     []int
+		expected int
+	}{
+		{"Small ints", []int{1, 2, 3, 4, 5}, 15},
+		{"Mixed ints", []int{1, 200, 3, 499, 5}, 708},
+		{"Big ints", []int{1111, 200, 3333, 499, 5555}, 10698},
+		{"Zero", []int{0}, 0},
+	}
+
+	for _, entry := range tests {
+		t.Run(entry.name, func(t *testing.T) {
+			result := utils.sum(entry.nums)
+
+			if result != entry.expected {
+				t.Errorf("expected %d, received %d", entry.expected, result)
+			}
+
+		})
+	}
+}