t.Run(tt.name, func(t *testing.T) {
			if got := tt.s.InsertAll(tt.items...); !reflect.DeepEqual(got, tt.want) {
				t.Errorf("InsertAll() = %v, want %v", got, tt.want)
			}
		})
	}
}

func TestInsertContains(t *testing.T) {
	s := New[string]()
	assert.Equal(t, s.InsertContains("k1"), false)
	assert.Equal(t, s.InsertContains("k1"), true)
	assert.Equal(t, s.InsertContains("k2"), false)