✨ (sum_test): add test for different size of slice

Author: yuanyu90221

arrays-and-slices/sum_test.go

@@ -3,12 +3,25 @@ package arrays_and_slices
 import "testing"
 
 func TestSum(t *testing.T) {
-	numbers := [5]int{1, 2, 3, 4, 5}
+	t.Run("collection of 5 numbers", func(t *testing.T) {
+		numbers := [5]int{1, 2, 3, 4, 5}
 
-	got := Sum(numbers)
-	want := 15
+		got := Sum(numbers)
+		want := 15
 
-	if got != want {
-		t.Errorf("got %d want %d ,given %v", got, want, numbers)
-	}
+		if got != want {
+			t.Errorf("got %d want %d ,given %v", got, want, numbers)
+		}
+	})
+
+	t.Run("collection of any size", func(t *testing.T) {
+		numbers := []int{1, 2, 3}
+
+		got := Sum(numbers)
+		want := 6
+
+		if got != want {
+			t.Errorf("got %d want %d, given %v", got, want, numbers)
+		}
+	})
 }