package xmpp

import (
	"encoding/xml"
	"strings"
	"testing"
)

type bufTest struct {
	xml     string
	levels  []int
}

func TestElementBuffer(t *testing.T) {
	var tests = []bufTest{
		bufTest{`<stream></stream>`, []int{1, 0}},
		bufTest{`<a><b>testing</b></a>`, []int{1, 2, 2, 1, 0}},
		bufTest{`<a><!-- comment --><b>testing</b></a>`, []int{1, 1, 2, 2, 1, 0}},
	}

	for _, v := range tests {
		r := strings.NewReader(v.xml)
		d := xml.NewDecoder(r)
		b := newElementBuffer()

		for i, _ := range v.levels {
			token, err := d.Token()
			if err != nil {
				break
			}
			err = b.add(token)
			if err != nil {
				t.Fatalf("xmpp.elementBuffer.add() returned error: `%v`!\n", err)
			}
			if b.level != v.levels[i] {
				t.Fatalf("Indent level of xmpp.elementBuffer %d does not match value given by test data %d!\n", b.level, v.levels[i])
			}
		}
	}
}