go-xmpp/stanza/xmpp_test.go

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package stanza_test
import (
"encoding/xml"
"errors"
"regexp"
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"testing"
"github.com/google/go-cmp/cmp"
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"gosrc.io/xmpp/stanza"
)
var reLeadcloseWhtsp = regexp.MustCompile(`^[\s\p{Zs}]+|[\s\p{Zs}]+$`)
var reInsideWhtsp = regexp.MustCompile(`[\s\p{Zs}]`)
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// ============================================================================
// Marshaller / unmarshaller test
func checkMarshalling(t *testing.T, iq *stanza.IQ) (*stanza.IQ, error) {
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// Marshall
data, err := xml.Marshal(iq)
if err != nil {
t.Errorf("cannot marshal iq: %s\n%#v", err, iq)
return nil, err
}
// Unmarshall
var parsedIQ stanza.IQ
err = xml.Unmarshal(data, &parsedIQ)
if err != nil {
t.Errorf("Unmarshal returned error: %s\n%s", err, data)
}
return &parsedIQ, err
}
// ============================================================================
// XML structs comparison
// Compare iq structure but ignore empty namespace as they are set properly on
// marshal / unmarshal. There is no need to manage them on the manually
// crafted structure.
func xmlEqual(x, y interface{}) bool {
return cmp.Equal(x, y, xmlOpts())
}
// xmlDiff compares xml structures ignoring namespace preferences
func xmlDiff(x, y interface{}) string {
return cmp.Diff(x, y, xmlOpts())
}
func xmlOpts() cmp.Options {
alwaysEqual := cmp.Comparer(func(_, _ interface{}) bool { return true })
opts := cmp.Options{
cmp.FilterValues(func(x, y interface{}) bool {
xx, xok := x.(xml.Name)
yy, yok := y.(xml.Name)
if xok && yok {
zero := xml.Name{}
if xx == zero || yy == zero {
return true
}
if xx.Space == "" || yy.Space == "" {
return true
}
}
return false
}, alwaysEqual),
}
return opts
}
func delSpaces(s string) string {
return reInsideWhtsp.ReplaceAllString(reLeadcloseWhtsp.ReplaceAllString(s, ""), "")
}
func compareMarshal(expected, data string) error {
if delSpaces(expected) != delSpaces(data) {
return errors.New("failed to verify unmarshal->marshal. Expected :" + expected + "\ngot: " + data)
}
return nil
}