# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

"""
Tests for L{twisted.words.xish.domish}, a DOM-like library for XMPP.
"""


from zope.interface.verify import verifyObject

from twisted.python.reflect import requireModule
from twisted.trial import unittest
from twisted.words.xish import domish


class ElementTests(unittest.TestCase):
    """
    Tests for L{domish.Element}.
    """

    def test_interface(self):
        """
        L{domish.Element} implements L{domish.IElement}.
        """
        verifyObject(domish.IElement, domish.Element((None, "foo")))

    def test_escaping(self):
        """
        The built-in entity references are properly encoded.
        """
        s = "&<>'\""
        self.assertEqual(domish.escapeToXml(s), "&amp;&lt;&gt;'\"")
        self.assertEqual(domish.escapeToXml(s, 1), "&amp;&lt;&gt;&apos;&quot;")

    def test_namespace(self):
        """
        An attribute on L{domish.Namespace} yields a qualified name.
        """
        ns = domish.Namespace("testns")
        self.assertEqual(ns.foo, ("testns", "foo"))

    def test_elementInit(self):
        """
        Basic L{domish.Element} initialization tests.
        """
        e = domish.Element((None, "foo"))
        self.assertEqual(e.name, "foo")
        self.assertEqual(e.uri, None)
        self.assertEqual(e.defaultUri, None)
        self.assertEqual(e.parent, None)

        e = domish.Element(("", "foo"))
        self.assertEqual(e.name, "foo")
        self.assertEqual(e.uri, "")
        self.assertEqual(e.defaultUri, "")
        self.assertEqual(e.parent, None)

        e = domish.Element(("testns", "foo"))
        self.assertEqual(e.name, "foo")
        self.assertEqual(e.uri, "testns")
        self.assertEqual(e.defaultUri, "testns")
        self.assertEqual(e.parent, None)

        e = domish.Element(("testns", "foo"), "test2ns")
        self.assertEqual(e.name, "foo")
        self.assertEqual(e.uri, "testns")
        self.assertEqual(e.defaultUri, "test2ns")

    def test_childOps(self):
        """
        Basic L{domish.Element} child tests.
        """
        e = domish.Element(("testns", "foo"))
        e.addContent("somecontent")
        b2 = e.addElement(("testns2", "bar2"))
        e["attrib1"] = "value1"
        e[("testns2", "attrib2")] = "value2"
        e.addElement("bar")
        e.addElement("bar")
        e.addContent("abc")
        e.addContent("123")

        # Check content merging
        self.assertEqual(e.children[-1], "abc123")

        # Check direct child accessor
        self.assertEqual(e.bar2, b2)
        e.bar2.addContent("subcontent")
        e.bar2["bar2value"] = "somevalue"

        # Check child ops
        self.assertEqual(e.children[1], e.bar2)
        self.assertEqual(e.children[2], e.bar)

        # Check attribute ops
        self.assertEqual(e["attrib1"], "value1")
        del e["attrib1"]
        self.assertEqual(e.hasAttribute("attrib1"), 0)
        self.assertEqual(e.hasAttribute("attrib2"), 0)
        self.assertEqual(e[("testns2", "attrib2")], "value2")

    def test_characterData(self):
        """
        Extract character data using L{str}.
        """
        element = domish.Element(("testns", "foo"))
        element.addContent("somecontent")

        text = str(element)
        self.assertEqual("somecontent", text)
        self.assertIsInstance(text, str)

    def test_characterDataNativeString(self):
        """
        Extract ascii character data using L{str}.
        """
        element = domish.Element(("testns", "foo"))
        element.addContent("somecontent")

        text = str(element)
        self.assertEqual("somecontent", text)
        self.assertIsInstance(text, str)

    def test_characterDataUnicode(self):
        """
        Extract character data using L{str}.
        """
        element = domish.Element(("testns", "foo"))
        element.addContent("\N{SNOWMAN}")

        text = str(element)
        self.assertEqual("\N{SNOWMAN}", text)
        self.assertIsInstance(text, str)

    def test_characterDataBytes(self):
        """
        Extract character data as UTF-8 using L{bytes}.
        """
        element = domish.Element(("testns", "foo"))
        element.addContent("\N{SNOWMAN}")

        text = bytes(element)
        self.assertEqual("\N{SNOWMAN}".encode(), text)
        self.assertIsInstance(text, bytes)

    def test_characterDataMixed(self):
        """
        Mixing addChild with cdata and element, the first cdata is returned.
        """
        element = domish.Element(("testns", "foo"))
        element.addChild("abc")
        element.addElement("bar")
        element.addChild("def")
        self.assertEqual("abc", str(element))

    def test_addContent(self):
        """
        Unicode strings passed to C{addContent} become the character data.
        """
        element = domish.Element(("testns", "foo"))
        element.addContent("unicode")
        self.assertEqual("unicode", str(element))

    def test_addContentNativeStringASCII(self):
        """
        ASCII native strings passed to C{addContent} become the character data.
        """
        element = domish.Element(("testns", "foo"))
        element.addContent("native")
        self.assertEqual("native", str(element))

    def test_addContentBytes(self):
        """
        Byte strings passed to C{addContent} are not acceptable on Python 3.
        """
        element = domish.Element(("testns", "foo"))
        self.assertRaises(TypeError, element.addContent, b"bytes")

    def test_addElementContent(self):
        """
        Content passed to addElement becomes character data on the new child.
        """
        element = domish.Element(("testns", "foo"))
        child = element.addElement("bar", content="abc")
        self.assertEqual("abc", str(child))

    def test_elements(self):
        """
        Calling C{elements} without arguments on a L{domish.Element} returns
        all child elements, whatever the qualified name.
        """
        e = domish.Element(("testns", "foo"))
        c1 = e.addElement("name")
        c2 = e.addElement(("testns2", "baz"))
        c3 = e.addElement("quux")
        c4 = e.addElement(("testns", "name"))

        elts = list(e.elements())

        self.assertIn(c1, elts)
        self.assertIn(c2, elts)
        self.assertIn(c3, elts)
        self.assertIn(c4, elts)

    def test_elementsWithQN(self):
        """
        Calling C{elements} with a namespace and local name on a
        L{domish.Element} returns all child elements with that qualified name.
        """
        e = domish.Element(("testns", "foo"))
        c1 = e.addElement("name")
        c2 = e.addElement(("testns2", "baz"))
        c3 = e.addElement("quux")
        c4 = e.addElement(("testns", "name"))

        elts = list(e.elements("testns", "name"))

        self.assertIn(c1, elts)
        self.assertNotIn(c2, elts)
        self.assertNotIn(c3, elts)
        self.assertIn(c4, elts)


class DomishStreamTestsMixin:
    """
    Mixin defining tests for different stream implementations.

    @ivar streamClass: A no-argument callable which will be used to create an
        XML parser which can produce a stream of elements from incremental
        input.
    """

    def setUp(self):
        self.doc_started = False
        self.doc_ended = False
        self.root = None
        self.elements = []
        self.stream = self.streamClass()
        self.stream.DocumentStartEvent = self._docStarted
        self.stream.ElementEvent = self.elements.append
        self.stream.DocumentEndEvent = self._docEnded

    def _docStarted(self, root):
        self.root = root
        self.doc_started = True

    def _docEnded(self):
        self.doc_ended = True

    def doTest(self, xml):
        self.stream.parse(xml)

    def testHarness(self):
        xml = b"<root><child/><child2/></root>"
        self.stream.parse(xml)
        self.assertEqual(self.doc_started, True)
        self.assertEqual(self.root.name, "root")
        self.assertEqual(self.elements[0].name, "child")
        self.assertEqual(self.elements[1].name, "child2")
        self.assertEqual(self.doc_ended, True)

    def testBasic(self):
        xml = (
            b"<stream:stream xmlns:stream='etherx' xmlns='jabber'>\n"
            + b"  <message to='bar'>"
            + b"    <x xmlns='xdelay'>some&amp;data&gt;</x>"
            + b"  </message>"
            + b"</stream:stream>"
        )

        self.stream.parse(xml)
        self.assertEqual(self.root.name, "stream")
        self.assertEqual(self.root.uri, "etherx")
        self.assertEqual(self.elements[0].name, "message")
        self.assertEqual(self.elements[0].uri, "jabber")
        self.assertEqual(self.elements[0]["to"], "bar")
        self.assertEqual(self.elements[0].x.uri, "xdelay")
        self.assertEqual(str(self.elements[0].x), "some&data>")

    def testNoRootNS(self):
        xml = b"<stream><error xmlns='etherx'/></stream>"

        self.stream.parse(xml)
        self.assertEqual(self.root.uri, "")
        self.assertEqual(self.elements[0].uri, "etherx")

    def testNoDefaultNS(self):
        xml = b"<stream:stream xmlns:stream='etherx'><error/></stream:stream>"

        self.stream.parse(xml)
        self.assertEqual(self.root.uri, "etherx")
        self.assertEqual(self.root.defaultUri, "")
        self.assertEqual(self.elements[0].uri, "")
        self.assertEqual(self.elements[0].defaultUri, "")

    def testChildDefaultNS(self):
        xml = b"<root xmlns='testns'><child/></root>"

        self.stream.parse(xml)
        self.assertEqual(self.root.uri, "testns")
        self.assertEqual(self.elements[0].uri, "testns")

    def testEmptyChildNS(self):
        xml = b"""<root xmlns='testns'>
                    <child1><child2 xmlns=''/></child1>
                  </root>"""

        self.stream.parse(xml)
        self.assertEqual(self.elements[0].child2.uri, "")

    def test_namespaceWithWhitespace(self):
        """
        Whitespace in an xmlns value is preserved in the resulting node's C{uri}
        attribute.
        """
        xml = b"<root xmlns:foo=' bar baz '><foo:bar foo:baz='quux'/></root>"
        self.stream.parse(xml)
        self.assertEqual(self.elements[0].uri, " bar baz ")
        self.assertEqual(self.elements[0].attributes, {(" bar baz ", "baz"): "quux"})

    def test_attributesWithNamespaces(self):
        """
        Attributes with namespace are parsed without Exception.
        (https://twistedmatrix.com/trac/ticket/9730 regression test)
        """

        xml = b"""<root xmlns:test='http://example.org' xml:lang='en'>
                    <test:test>test</test:test>
                  </root>"""

        # with Python 3.8 and without #9730 fix, the following error would
        # happen at next line:
        # ``RuntimeError: dictionary keys changed during iteration``
        self.stream.parse(xml)
        self.assertEqual(self.elements[0].uri, "http://example.org")

    def testChildPrefix(self):
        xml = b"<root xmlns='testns' xmlns:foo='testns2'><foo:child/></root>"

        self.stream.parse(xml)
        self.assertEqual(self.root.localPrefixes["foo"], "testns2")
        self.assertEqual(self.elements[0].uri, "testns2")

    def testUnclosedElement(self):
        self.assertRaises(
            domish.ParserError, self.stream.parse, b"<root><error></root>"
        )

    def test_namespaceReuse(self):
        """
        Test that reuse of namespaces does affect an element's serialization.

        When one element uses a prefix for a certain namespace, this is
        stored in the C{localPrefixes} attribute of the element. We want
        to make sure that elements created after such use, won't have this
        prefix end up in their C{localPrefixes} attribute, too.
        """

        xml = b"""<root>
                    <foo:child1 xmlns:foo='testns'/>
                    <child2 xmlns='testns'/>
                  </root>"""

        self.stream.parse(xml)
        self.assertEqual("child1", self.elements[0].name)
        self.assertEqual("testns", self.elements[0].uri)
        self.assertEqual("", self.elements[0].defaultUri)
        self.assertEqual({"foo": "testns"}, self.elements[0].localPrefixes)
        self.assertEqual("child2", self.elements[1].name)
        self.assertEqual("testns", self.elements[1].uri)
        self.assertEqual("testns", self.elements[1].defaultUri)
        self.assertEqual({}, self.elements[1].localPrefixes)


class DomishExpatStreamTests(DomishStreamTestsMixin, unittest.TestCase):
    """
    Tests for L{domish.ExpatElementStream}, the expat-based element stream
    implementation.
    """

    streamClass = domish.ExpatElementStream

    if requireModule("pyexpat", default=None) is None:
        skip = "pyexpat is required for ExpatElementStream tests."


class DomishSuxStreamTests(DomishStreamTestsMixin, unittest.TestCase):
    """
    Tests for L{domish.SuxElementStream}, the L{twisted.web.sux}-based element
    stream implementation.
    """

    streamClass = domish.SuxElementStream


class SerializerTests(unittest.TestCase):
    def testNoNamespace(self):
        e = domish.Element((None, "foo"))
        self.assertEqual(e.toXml(), "<foo/>")
        self.assertEqual(e.toXml(closeElement=0), "<foo>")

    def testDefaultNamespace(self):
        e = domish.Element(("testns", "foo"))
        self.assertEqual(e.toXml(), "<foo xmlns='testns'/>")

    def testOtherNamespace(self):
        e = domish.Element(("testns", "foo"), "testns2")
        self.assertEqual(
            e.toXml({"testns": "bar"}), "<bar:foo xmlns:bar='testns' xmlns='testns2'/>"
        )

    def testChildDefaultNamespace(self):
        e = domish.Element(("testns", "foo"))
        e.addElement("bar")
        self.assertEqual(e.toXml(), "<foo xmlns='testns'><bar/></foo>")

    def testChildSameNamespace(self):
        e = domish.Element(("testns", "foo"))
        e.addElement(("testns", "bar"))
        self.assertEqual(e.toXml(), "<foo xmlns='testns'><bar/></foo>")

    def testChildSameDefaultNamespace(self):
        e = domish.Element(("testns", "foo"))
        e.addElement("bar", "testns")
        self.assertEqual(e.toXml(), "<foo xmlns='testns'><bar/></foo>")

    def testChildOtherDefaultNamespace(self):
        e = domish.Element(("testns", "foo"))
        e.addElement(("testns2", "bar"), "testns2")
        self.assertEqual(e.toXml(), "<foo xmlns='testns'><bar xmlns='testns2'/></foo>")

    def testOnlyChildDefaultNamespace(self):
        e = domish.Element((None, "foo"))
        e.addElement(("ns2", "bar"), "ns2")
        self.assertEqual(e.toXml(), "<foo><bar xmlns='ns2'/></foo>")

    def testOnlyChildDefaultNamespace2(self):
        e = domish.Element((None, "foo"))
        e.addElement("bar")
        self.assertEqual(e.toXml(), "<foo><bar/></foo>")

    def testChildInDefaultNamespace(self):
        e = domish.Element(("testns", "foo"), "testns2")
        e.addElement(("testns2", "bar"))
        self.assertEqual(
            e.toXml(), "<xn0:foo xmlns:xn0='testns' xmlns='testns2'><bar/></xn0:foo>"
        )

    def testQualifiedAttribute(self):
        e = domish.Element((None, "foo"), attribs={("testns2", "bar"): "baz"})
        self.assertEqual(e.toXml(), "<foo xmlns:xn0='testns2' xn0:bar='baz'/>")

    def testQualifiedAttributeDefaultNS(self):
        e = domish.Element(("testns", "foo"), attribs={("testns", "bar"): "baz"})
        self.assertEqual(
            e.toXml(), "<foo xmlns='testns' xmlns:xn0='testns' xn0:bar='baz'/>"
        )

    def testTwoChilds(self):
        e = domish.Element(("", "foo"))
        child1 = e.addElement(("testns", "bar"), "testns2")
        child1.addElement(("testns2", "quux"))
        child2 = e.addElement(("testns3", "baz"), "testns4")
        child2.addElement(("testns", "quux"))
        self.assertEqual(
            e.toXml(),
            "<foo><xn0:bar xmlns:xn0='testns' xmlns='testns2'><quux/></xn0:bar><xn1:baz xmlns:xn1='testns3' xmlns='testns4'><xn0:quux xmlns:xn0='testns'/></xn1:baz></foo>",
        )

    def testXMLNamespace(self):
        e = domish.Element(
            (None, "foo"),
            attribs={("http://www.w3.org/XML/1998/namespace", "lang"): "en_US"},
        )
        self.assertEqual(e.toXml(), "<foo xml:lang='en_US'/>")

    def testQualifiedAttributeGivenListOfPrefixes(self):
        e = domish.Element((None, "foo"), attribs={("testns2", "bar"): "baz"})
        self.assertEqual(
            e.toXml({"testns2": "qux"}), "<foo xmlns:qux='testns2' qux:bar='baz'/>"
        )

    def testNSPrefix(self):
        e = domish.Element((None, "foo"), attribs={("testns2", "bar"): "baz"})
        c = e.addElement(("testns2", "qux"))
        c[("testns2", "bar")] = "quux"

        self.assertEqual(
            e.toXml(),
            "<foo xmlns:xn0='testns2' xn0:bar='baz'><xn0:qux xn0:bar='quux'/></foo>",
        )

    def testDefaultNSPrefix(self):
        e = domish.Element((None, "foo"), attribs={("testns2", "bar"): "baz"})
        c = e.addElement(("testns2", "qux"))
        c[("testns2", "bar")] = "quux"
        c.addElement("foo")

        self.assertEqual(
            e.toXml(),
            "<foo xmlns:xn0='testns2' xn0:bar='baz'><xn0:qux xn0:bar='quux'><xn0:foo/></xn0:qux></foo>",
        )

    def testPrefixScope(self):
        e = domish.Element(("testns", "foo"))

        self.assertEqual(
            e.toXml(prefixes={"testns": "bar"}, prefixesInScope=["bar"]), "<bar:foo/>"
        )

    def testLocalPrefixes(self):
        e = domish.Element(("testns", "foo"), localPrefixes={"bar": "testns"})
        self.assertEqual(e.toXml(), "<bar:foo xmlns:bar='testns'/>")

    def testLocalPrefixesWithChild(self):
        e = domish.Element(("testns", "foo"), localPrefixes={"bar": "testns"})
        e.addElement("baz")
        self.assertIdentical(e.baz.defaultUri, None)
        self.assertEqual(e.toXml(), "<bar:foo xmlns:bar='testns'><baz/></bar:foo>")

    def test_prefixesReuse(self):
        """
        Test that prefixes passed to serialization are not modified.

        This test makes sure that passing a dictionary of prefixes repeatedly
        to C{toXml} of elements does not cause serialization errors. A
        previous implementation changed the passed in dictionary internally,
        causing havoc later on.
        """
        prefixes = {"testns": "foo"}

        # test passing of dictionary
        s = domish.SerializerClass(prefixes=prefixes)
        self.assertNotIdentical(prefixes, s.prefixes)

        # test proper serialization on prefixes reuse
        e = domish.Element(("testns2", "foo"), localPrefixes={"quux": "testns2"})
        self.assertEqual("<quux:foo xmlns:quux='testns2'/>", e.toXml(prefixes=prefixes))
        e = domish.Element(("testns2", "foo"))
        self.assertEqual("<foo xmlns='testns2'/>", e.toXml(prefixes=prefixes))

    def testRawXMLSerialization(self):
        e = domish.Element((None, "foo"))
        e.addRawXml("<abc123>")
        # The testcase below should NOT generate valid XML -- that's
        # the whole point of using the raw XML call -- it's the callers
        # responsibility to ensure that the data inserted is valid
        self.assertEqual(e.toXml(), "<foo><abc123></foo>")

    def testRawXMLWithUnicodeSerialization(self):
        e = domish.Element((None, "foo"))
        e.addRawXml("<degree>\u00B0</degree>")
        self.assertEqual(e.toXml(), "<foo><degree>\u00B0</degree></foo>")

    def testUnicodeSerialization(self):
        e = domish.Element((None, "foo"))
        e["test"] = "my value\u0221e"
        e.addContent("A degree symbol...\u00B0")
        self.assertEqual(
            e.toXml(), "<foo test='my value\u0221e'" ">A degree symbol...\u00B0</foo>"
        )
