# Copyright (c) Ralph Meijer.
# See LICENSE for details.

"""
Tests for L{wokkel.generic}.
"""

from twisted.trial import unittest
from twisted.words.xish import domish
from twisted.words.protocols.jabber.jid import JID

from wokkel import generic
from wokkel.test.helpers import XmlStreamStub

NS_VERSION = 'jabber:iq:version'

class VersionHandlerTest(unittest.TestCase):
    """
    Tests for L{wokkel.generic.VersionHandler}.
    """

    def test_onVersion(self):
        """
        Test response to incoming version request.
        """
        self.stub = XmlStreamStub()
        self.protocol = generic.VersionHandler('Test', '0.1.0')
        self.protocol.xmlstream = self.stub.xmlstream
        self.protocol.send = self.stub.xmlstream.send
        self.protocol.connectionInitialized()

        iq = domish.Element((None, 'iq'))
        iq['from'] = 'user@example.org/Home'
        iq['to'] = 'example.org'
        iq['type'] = 'get'
        iq.addElement((NS_VERSION, 'query'))
        self.stub.send(iq)

        response = self.stub.output[-1]
        self.assertEquals('user@example.org/Home', response['to'])
        self.assertEquals('example.org', response['from'])
        self.assertEquals('result', response['type'])
        self.assertEquals(NS_VERSION, response.query.uri)
        elements = list(domish.generateElementsQNamed(response.query.children,
                                                      'name', NS_VERSION))
        self.assertEquals(1, len(elements))
        self.assertEquals('Test', unicode(elements[0]))
        elements = list(domish.generateElementsQNamed(response.query.children,
                                                      'version', NS_VERSION))
        self.assertEquals(1, len(elements))
        self.assertEquals('0.1.0', unicode(elements[0]))



class XmlPipeTest(unittest.TestCase):
    """
    Tests for L{wokkel.generic.XmlPipe}.
    """

    def setUp(self):
        self.pipe = generic.XmlPipe()


    def test_sendFromSource(self):
        """
        Send an element from the source and observe it from the sink.
        """
        def cb(obj):
            called.append(obj)

        called = []
        self.pipe.sink.addObserver('/test[@xmlns="testns"]', cb)
        element = domish.Element(('testns', 'test'))
        self.pipe.source.send(element)
        self.assertEquals([element], called)


    def test_sendFromSink(self):
        """
        Send an element from the sink and observe it from the source.
        """
        def cb(obj):
            called.append(obj)

        called = []
        self.pipe.source.addObserver('/test[@xmlns="testns"]', cb)
        element = domish.Element(('testns', 'test'))
        self.pipe.sink.send(element)
        self.assertEquals([element], called)



class StanzaTest(unittest.TestCase):
    """
    Tests for L{generic.Stanza}.
    """

    def test_fromElement(self):
        xml = """
        <message type='chat' from='other@example.org' to='user@example.org'/>
        """

        stanza = generic.Stanza.fromElement(generic.parseXml(xml))
        self.assertEqual('chat', stanza.stanzaType)
        self.assertEqual(JID('other@example.org'), stanza.sender)
        self.assertEqual(JID('user@example.org'), stanza.recipient)


    def test_fromElementChildParser(self):
        """
        Child elements for which no parser is defined are ignored.
        """
        xml = """
        <message from='other@example.org' to='user@example.org'>
          <x xmlns='http://example.org/'/>
        </message>
        """

        class Message(generic.Stanza):
            childParsers = {('http://example.org/', 'x'): '_childParser_x'}
            elements = []

            def _childParser_x(self, element):
                self.elements.append(element)

        message = Message.fromElement(generic.parseXml(xml))
        self.assertEqual(1, len(message.elements))


    def test_fromElementChildParserAll(self):
        """
        Child elements for which no parser is defined are ignored.
        """
        xml = """
        <message from='other@example.org' to='user@example.org'>
          <x xmlns='http://example.org/'/>
        </message>
        """

        class Message(generic.Stanza):
            childParsers = {None: '_childParser'}
            elements = []

            def _childParser(self, element):
                self.elements.append(element)

        message = Message.fromElement(generic.parseXml(xml))
        self.assertEqual(1, len(message.elements))


    def test_fromElementChildParserUnknown(self):
        """
        Child elements for which no parser is defined are ignored.
        """
        xml = """
        <message from='other@example.org' to='user@example.org'>
          <x xmlns='http://example.org/'/>
        </message>
        """
        generic.Stanza.fromElement(generic.parseXml(xml))




class RequestTest(unittest.TestCase):
    """
    Tests for L{generic.Request}.
    """

    def setUp(self):
        self.request = generic.Request()


    def test_requestParser(self):
        """
        The request's child element is passed to requestParser.
        """
        xml = """
        <iq type='get'>
          <query xmlns='jabber:iq:version'/>
        </iq>
        """

        class VersionRequest(generic.Request):
            elements = []

            def parseRequest(self, element):
                self.elements.append((element.uri, element.name))

        request = VersionRequest.fromElement(generic.parseXml(xml))
        self.assertEqual([(NS_VERSION, 'query')], request.elements)


    def test_toElementStanzaKind(self):
        """
        A request is an iq stanza.
        """
        element = self.request.toElement()
        self.assertIdentical(None, element.uri)
        self.assertEquals('iq', element.name)


    def test_toElementStanzaType(self):
        """
        The request has type 'get'.
        """
        self.assertEquals('get', self.request.stanzaType)
        element = self.request.toElement()
        self.assertEquals('get', element.getAttribute('type'))


    def test_toElementStanzaTypeSet(self):
        """
        The request has type 'set'.
        """
        self.request.stanzaType = 'set'
        element = self.request.toElement()
        self.assertEquals('set', element.getAttribute('type'))


    def test_toElementStanzaID(self):
        """
        A request, when rendered, has an identifier.
        """
        element = self.request.toElement()
        self.assertNotIdentical(None, self.request.stanzaID)
        self.assertEquals(self.request.stanzaID, element.getAttribute('id'))


    def test_toElementRecipient(self):
        """
        A request without recipient, has no 'to' attribute.
        """
        self.request = generic.Request(recipient=JID('other@example.org'))
        self.assertEquals(JID('other@example.org'), self.request.recipient)
        element = self.request.toElement()
        self.assertEquals(u'other@example.org', element.getAttribute('to'))


    def test_toElementRecipientNone(self):
        """
        A request without recipient, has no 'to' attribute.
        """
        element = self.request.toElement()
        self.assertFalse(element.hasAttribute('to'))


    def test_toElementSender(self):
        """
        A request with sender, has a 'from' attribute.
        """
        self.request = generic.Request(sender=JID('user@example.org'))
        self.assertEquals(JID('user@example.org'), self.request.sender)
        element = self.request.toElement()
        self.assertEquals(u'user@example.org', element.getAttribute('from'))


    def test_toElementSenderNone(self):
        """
        A request without sender, has no 'from' attribute.
        """
        element = self.request.toElement()
        self.assertFalse(element.hasAttribute('from'))


    def test_timeoutDefault(self):
        """
        The default is no timeout.
        """
        self.assertIdentical(None, self.request.timeout)



class PrepareIDNNameTests(unittest.TestCase):
    """
    Tests for L{wokkel.generic.prepareIDNName}.
    """

    def test_bytestring(self):
        """
        An ASCII-encoded byte string is left as-is.
        """
        name = b"example.com"
        result = generic.prepareIDNName(name)
        self.assertEqual(b"example.com", result)


    def test_unicode(self):
        """
        A unicode all-ASCII name is converted to an ASCII byte string.
        """
        name = u"example.com"
        result = generic.prepareIDNName(name)
        self.assertEqual(b"example.com", result)


    def test_unicodeNonASCII(self):
        """
        A unicode with non-ASCII is converted to its ACE equivalent.
        """
        name = u"\u00e9chec.example.com"
        result = generic.prepareIDNName(name)
        self.assertEqual(b"xn--chec-9oa.example.com", result)


    def test_unicodeHalfwidthIdeographicFullStop(self):
        """
        Exotic dots in unicode names are converted to Full Stop.
        """
        name = u"\u00e9chec.example\uff61com"
        result = generic.prepareIDNName(name)
        self.assertEqual(b"xn--chec-9oa.example.com", result)


    def test_unicodeTrailingDot(self):
        """
        Unicode names with trailing dots retain the trailing dot.

        L{encodings.idna.ToASCII} doesn't allow the empty string as the input,
        hence the implementation needs to strip a trailing dot, and re-add it
        after encoding the labels.
        """
        name = u"example.com."
        result = generic.prepareIDNName(name)
        self.assertEqual(b"example.com.", result)