package iterator

import (
	"github.com/stretchr/testify/assert"
	"iter"
	"testing"
)

func TestSet(t *testing.T) {
	s := NewOrderedSet[string]()
	list := []string{
		"fantasticbin",
		"phper",
		"gopher",
		"javaer",
	}
	s.FromSlice(list)
	var pull, push, filter []string
	expected := list[:3]

	// 只推
	for v := range s.All() {
		if v == "javaer" {
			break
		}
		push = append(push, v)
	}

	// 既推又拉
	next, stop := iter.Pull(s.All())
	for {
		v, ok := next()
		if !ok {
			break
		}

		pull = append(pull, v)
		if v == "gopher" {
			stop()
		}
	}

	// 筛选
	for v := range s.FilterMap(func(v string) bool {
		return v != "javaer"
	}) {
		filter = append(filter, v)
	}

	assert.Equal(t, expected, push)
	assert.Equal(t, expected, pull)
	assert.Equal(t, expected, filter)
}