package util import ( "testing" "github.com/google/go-cmp/cmp" ) func TestReverse(t *testing.T) { input := []int{1, 2, 3, 4, 5} if diff := cmp.Diff([]int{5, 4, 3, 2, 1}, Reverse(input)); diff != "" { t.Errorf("Result mismatch (-want +got):\n%s", diff) } }