suds/tests/test_sax_encoder.py

# -*- coding: utf-8 -*-

# This program is free software; you can redistribute it and/or modify it under
# the terms of the (LGPL) GNU Lesser General Public License as published by the
# Free Software Foundation; either version 3 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Library Lesser General Public License
# for more details at ( http://www.gnu.org/licenses/lgpl.html ).
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# written by: Jurko Gospodnetić ( [email protected] )

"""
Suds SAX module's special character encoder unit tests.

Implemented using the 'pytest' testing framework.

"""

if __name__ == "__main__":
    import testutils
    testutils.run_using_pytest(globals())

import suds.sax.enc

import pytest


"""Data not affected by encode()/decode() operations."""
invariant_decoded_encoded_test_data = (
    # Empty text.
    "",
    # Pure text.
    "x",
    "xyz",
    "Devil take the hindmost",
    # Whitespace handling.
    "spaces    kept",
    " ",
    "  ",
    "\t",
    "\v",
    "\f",
    "\r",
    "\n",
    "  \t\t\v\v   \f\f  \v\v\f\r\n\n\r  \t \t\t",
    "  \t\f\v   something   \r\r\n\freal\f\f\r\n\f\t\f")

"""
Data that should not be affected by encode()/decode() operations but for which
the current encode()/decode() operation implementations are broken.

"""
invariant_decoded_encoded_test_data__broken = (
    # CDATA handling.
    "<![CDATA['\"&<> \t\r\n\v\f &lt; &gt; &apos; &quot; &amp;]]>",
    "<![CDATA[\\'\\\"\\&\\<\\> \\&lt; \\&gt; \\&apos; \\&quot; ]\\&amp;]]>",
    "<![CDATA[&&<><><><>>>>><<<< This is !!!&& &amp; a test...."
        "<<>>>>>>>>}}>]?]>>>>]]>")

"""
Data that should not be affected by encode()/decode() operations but for which
the current encode() operation implementation is broken.

"""
invariant_decoded_encoded_test_data__broken_encode = (
    # CDATA handling.
    "<![CDATA[]]>",
    "<![CDATA[wonderful]]>",
    "<![CDATA[&]] >]]>",
    "<![CDATA[\"It's a wonderful life!\", said the smurf.]]>",
    "<![CDATA[<![CDATA[<![CDATA[<![CDATA[]]>",
    "<![CDATA[<![CDATA[]]]]><![CDATA[>]]>")

"""
Decoded/encoded data convertible in either direction using encode()/decode()
operations.

"""
symmetric_decoded_encoded_test_data = [
    # Simple replacements.
    ("<", "&lt;"),
    (">", "&gt;"),
    ("'", "&apos;"),
    ('"', "&quot;"),
    ("&", "&amp;"),
    # Mixed replacements.
    ("abcd&&<<", "abcd&amp;&amp;&lt;&lt;"),
    # Character reference lookalikes.
    ("& lt;", "&amp; lt;"),
    ("&gt ;", "&amp;gt ;"),
    ("&a pos;", "&amp;a pos;"),
    ("&walle;", "&amp;walle;"),
    ("&quot", "&amp;quot"),
    ("&quo", "&amp;quo"),
    ("amp;", "amp;"),
    # XML markup.
    ("<a>unga-bunga</a>", "&lt;a&gt;unga-bunga&lt;/a&gt;"),
    ("<a></b>", "&lt;a&gt;&lt;/b&gt;"),
    ("<&></\n>", "&lt;&amp;&gt;&lt;/\n&gt;"),
    ("<a id=\"fluffy's\"> && </a>",
        "&lt;a id=&quot;fluffy&apos;s&quot;&gt; &amp;&amp; &lt;/a&gt;"),
    # CDATA handling.
    ("< ![CDATA[&]]>", "&lt; ![CDATA[&amp;]]&gt;"),
    ("<! [CDATA[&]]>", "&lt;! [CDATA[&amp;]]&gt;"),
    ("<![ CDATA[&]]>", "&lt;![ CDATA[&amp;]]&gt;"),
    ("<![CDATA [&]]>", "&lt;![CDATA [&amp;]]&gt;")] + [
    # Invarant data.
    (x, x) for x in invariant_decoded_encoded_test_data]

"""
Decoded/encoded data that should be convertible in either direction using
encode()/decode() operations but for which the current encode()/decode()
operation implementations are broken.

"""
symmetric_decoded_encoded_test_data__broken = [
    # CDATA handling.
    (x, x) for x in invariant_decoded_encoded_test_data__broken]

"""
Decoded/encoded data that should be convertible in either direction using
encode()/decode() operations but for which the current encode() operation
implementation is broken.

"""
symmetric_decoded_encoded_test_data__broken_encode = [
    # CDATA handling.
    (x, x) for x in invariant_decoded_encoded_test_data__broken_encode] + [
    ("<a><![CDATA[<a></a>]]></a>", "&lt;a&gt;<![CDATA[<a></a>]]>&lt;/a&gt;"),
    ("&<![CDATA[&<![CDATA[&]]>&]]>&",
        "&amp;<![CDATA[&<![CDATA[&]]>&amp;]]&gt;&amp;")]


@pytest.mark.parametrize(("input", "expected"), [
    (e, d) for d, e in
        symmetric_decoded_encoded_test_data +
        symmetric_decoded_encoded_test_data__broken_encode] + [
    pytest.param(e, d, marks=pytest.mark.xfail(reason="CDATA encoding not supported yet"))
        for d, e in symmetric_decoded_encoded_test_data__broken] + [
    # Character reference lookalikes.
    (x, x) for x in (
        "& lt;",
        "&gt ;",
        "&a pos;",
        "&walle;",
        "&quot",
        "&quo",
        "amp;")] + [
    # Double decode.
    ("&amp;amp;", "&amp;"),
    ("&amp;lt;", "&lt;"),
    ("&amp;gt;", "&gt;"),
    ("&amp;apos;", "&apos;"),
    ("&amp;quot;", "&quot;")])
def test_decode(input, expected):
    assert suds.sax.enc.Encoder().decode(input) == expected


@pytest.mark.parametrize(("input", "expected"),
    symmetric_decoded_encoded_test_data + [
    pytest.param(x, y, marks=pytest.mark.xfail(reason="CDATA encoding not supported yet")) for x, y in
        symmetric_decoded_encoded_test_data__broken +
        symmetric_decoded_encoded_test_data__broken_encode] + [
    # Double encoding.
    #TODO: See whether this 'avoid double encoding' behaviour is actually
    # desirable. That is how XML entity reference encoding has been implemented
    # in the original suds implementation, but it makes encode/decode
    # operations asymmetric and prevents the user from actually encoding data
    # like '&amp;' that should not be interpreted as '&'.
    ("&amp;", "&amp;"),
    ("&lt;", "&lt;"),
    ("&gt;", "&gt;"),
    ("&apos;", "&apos;"),
    ("&quot;", "&quot;")])
def test_encode(input, expected):
    assert suds.sax.enc.Encoder().encode(input) == expected