package mdb

import (
	"reflect"
	"testing"
)

func TestBTreeIterator(t *testing.T) {
	testWithDB(t, "min/max matches iterator", func(t *testing.T, db *DB) {
		users := []User{
			{ID: db.Users.c.NextID(), Email: "a@b.com", Name: "aaa"},
			{ID: db.Users.c.NextID(), Email: "e@f.com", Name: "bbb"},
			{ID: db.Users.c.NextID(), Email: "c@d.com", Name: "ccc"},
		}
		for _, u := range users {
			if _, err := db.Users.c.Insert(u); err != nil {
				t.Fatal(err)
			}
		}

		it := db.Users.nameBTree.Ascend()
		if !it.Next() {
			t.Fatal("No next")
		}
		u := it.Value()
		if !reflect.DeepEqual(u, users[0]) {
			t.Fatal(u, users[0])
		}
		it.Close()

		it = db.Users.nameBTree.Descend()
		if !it.Next() {
			t.Fatal("No next")
		}
		u = it.Value()
		if !reflect.DeepEqual(u, users[2]) {
			t.Fatal(u, users[2])
		}
		it.Close()

	})
}