func TestPushPeek(t *testing.T) {
deque := deque.New()
deque.PushFront("a")
if deque.FrontItem() != "a" {
t.Errorf("got: %v, want: a", deque.FrontItem())
}
deque.PushBack("z")
if deque.BackItem() != "z" {
t.Errorf("got: %v, want: z", deque.BackItem())
}
}
func BenchmarkFrontItem(b *testing.B) {
const N = 16
deque := deque.New()
for i := 0; i < N; i++ {
deque.PushBack(i)
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
_ = deque.FrontItem()
}
}
func TestEmpty_item(t *testing.T) {
deque := deque.New()
frontItem := deque.FrontItem()
if frontItem != nil {
t.Errorf("got: %v, want: <nil>", frontItem)
}
backItem := deque.BackItem()
if backItem != nil {
t.Errorf("got: %v, want: <nil>", backItem)
}
}