Decrement Depth in DecodeElement()

A test case and fix for Issue #3

xpp.go

@@ -211,6 +211,7 @@ func (p *XMLPullParser) DecodeElement(v interface{}) error {
 	// to the previous StartTag event's name
 	p.resetTokenState()
 	p.Event = EndTag
+	p.Depth--
 	p.Name = name
 	p.token = nil
 	return nil

xpp_test.go

@@ -58,6 +58,33 @@ func TestSpaceStackNestedTag(t *testing.T) {
 	assert.EqualValues(t, map[string]string{}, p.Spaces)
 }
 
+func TestDecodeElementDepth(t *testing.T) {
+	crReader := func(charset string, input io.Reader) (io.Reader, error) {
+		return input, nil
+	}
+	r := bytes.NewBufferString(`<root><d2>foo</d2><d2>bar</d2></root>`)
+	p := xpp.NewXMLPullParser(r, false, crReader)
+
+	type v struct{}
+
+	// move to root
+	p.NextTag()
+	assert.Equal(t, "root", p.Name)
+	assert.Equal(t, 1, p.Depth)
+
+	// decode first <d2>
+	p.NextTag()
+	assert.Equal(t, "d2", p.Name)
+	assert.Equal(t, 2, p.Depth)
+	p.DecodeElement(&v{})
+
+	// decode second <d2>
+	p.NextTag()
+	assert.Equal(t, "d2", p.Name)
+	assert.Equal(t, 2, p.Depth) // should still be 2, not 3
+	p.DecodeElement(&v{})
+}
+
 func toNextStart(t *testing.T, p *xpp.XMLPullParser) {
 	for {
 		tok, err := p.NextToken()