~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2005, 2006, 2007, 2009, 2010 Canonical Ltd

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 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 General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

"""Tests for rio serialization

A simple, reproducible structured IO format.

rio itself works in Unicode strings.  It is typically encoded to UTF-8,

but this depends on the transport.

"""

import cStringIO

import os

import re

import sys

from tempfile import TemporaryFile

from bzrlib import (

    rio,

    )

from bzrlib.tests import TestCaseInTempDir, TestCase

from bzrlib.rio import (RioWriter, Stanza, read_stanza, read_stanzas, rio_file,

                        RioReader)

class TestRio(TestCase):

    def test_stanza(self):

        """Construct rio stanza in memory"""

        s = Stanza(number='42', name="fred")

        self.assertTrue('number' in s)

        self.assertFalse('color' in s)

        self.assertFalse('42' in s)

        self.assertEquals(list(s.iter_pairs()),

                [('name', 'fred'), ('number', '42')])

        self.assertEquals(s.get('number'), '42')

        self.assertEquals(s.get('name'), 'fred')

    def test_value_checks(self):

        """rio checks types on construction"""

        # these aren't enforced at construction time

        ## self.assertRaises(ValueError,

        ##        Stanza, complex=42 + 3j)

        ## self.assertRaises(ValueError,

        ##        Stanza, several=range(10))

    def test_empty_value(self):

        """Serialize stanza with empty field"""

        s = Stanza(empty='')

        self.assertEqualDiff(s.to_string(),

                "empty: \n")

    def test_to_lines(self):

        """Write simple rio stanza to string"""

        s = Stanza(number='42', name='fred')

        self.assertEquals(list(s.to_lines()),

                ['name: fred\n',

                 'number: 42\n'])

    def test_as_dict(self):

        """Convert rio Stanza to dictionary"""

        s = Stanza(number='42', name='fred')

        sd = s.as_dict()

        self.assertEquals(sd, dict(number='42', name='fred'))

    def test_to_file(self):

        """Write rio to file"""

        tmpf = TemporaryFile()

        s = Stanza(a_thing='something with "quotes like \\"this\\""', number='42', name='fred')

        s.write(tmpf)

        tmpf.seek(0)

        self.assertEqualDiff(tmpf.read(), r'''

a_thing: something with "quotes like \"this\""

name: fred

number: 42

'''[1:])

    def test_multiline_string(self):

        tmpf = TemporaryFile()

        s = Stanza(motto="war is peace\nfreedom is slavery\nignorance is strength")

        s.write(tmpf)

        tmpf.seek(0)

        self.assertEqualDiff(tmpf.read(), '''\

motto: war is peace

\tfreedom is slavery

\tignorance is strength

''')

        tmpf.seek(0)

        s2 = read_stanza(tmpf)

        self.assertEquals(s, s2)

    def test_read_stanza(self):

        """Load stanza from string"""

        lines = """\

revision: mbp@sourcefrog.net-123-abc

timestamp: 1130653962

timezone: 36000

committer: Martin Pool <mbp@test.sourcefrog.net>

""".splitlines(True)

        s = read_stanza(lines)

        self.assertTrue('revision' in s)

        self.assertEqualDiff(s.get('revision'), 'mbp@sourcefrog.net-123-abc')

        self.assertEquals(list(s.iter_pairs()),

                [('revision', 'mbp@sourcefrog.net-123-abc'),

                 ('timestamp', '1130653962'),

                 ('timezone', '36000'),

                 ('committer', "Martin Pool <mbp@test.sourcefrog.net>")])

        self.assertEquals(len(s), 4)

    def test_repeated_field(self):

        """Repeated field in rio"""

        s = Stanza()

        for k, v in [('a', '10'), ('b', '20'), ('a', '100'), ('b', '200'),

                     ('a', '1000'), ('b', '2000')]:

            s.add(k, v)

        s2 = read_stanza(s.to_lines())

        self.assertEquals(s, s2)

        self.assertEquals(s.get_all('a'), map(str, [10, 100, 1000]))

        self.assertEquals(s.get_all('b'), map(str, [20, 200, 2000]))

    def test_backslash(self):

        s = Stanza(q='\\')

        t = s.to_string()

        self.assertEqualDiff(t, 'q: \\\n')

        s2 = read_stanza(s.to_lines())

        self.assertEquals(s, s2)

    def test_blank_line(self):

        s = Stanza(none='', one='\n', two='\n\n')

        self.assertEqualDiff(s.to_string(), """\

none:\x20

one:\x20

\t

two:\x20

\t

\t

""")

        s2 = read_stanza(s.to_lines())

        self.assertEquals(s, s2)

    def test_whitespace_value(self):

        s = Stanza(space=' ', tabs='\t\t\t', combo='\n\t\t\n')

        self.assertEqualDiff(s.to_string(), """\

combo:\x20

\t\t\t

\t

space:\x20\x20

tabs: \t\t\t

""")

        s2 = read_stanza(s.to_lines())

        self.assertEquals(s, s2)

        self.rio_file_stanzas([s])

    def test_quoted(self):

        """rio quoted string cases"""

        s = Stanza(q1='"hello"',

                   q2=' "for',

                   q3='\n\n"for"\n',

                   q4='for\n"\nfor',

                   q5='\n',

                   q6='"',

                   q7='""',

                   q8='\\',

                   q9='\\"\\"',

                   )

        s2 = read_stanza(s.to_lines())

        self.assertEquals(s, s2)

        # apparent bug in read_stanza

        # s3 = read_stanza(self.stanzas_to_str([s]))

        # self.assertEquals(s, s3)

    def test_read_empty(self):

        """Detect end of rio file"""

        s = read_stanza([])

        self.assertEqual(s, None)

        self.assertTrue(s is None)

    def test_read_nul_byte(self):

        """File consisting of a nul byte causes an error."""

        self.assertRaises(ValueError, read_stanza, ['\0'])

    def test_read_nul_bytes(self):

        """File consisting of many nul bytes causes an error."""

        self.assertRaises(ValueError, read_stanza, ['\0' * 100])

    def test_read_iter(self):

        """Read several stanzas from file"""

        tmpf = TemporaryFile()

        tmpf.write("""\

version_header: 1

name: foo

val: 123

name: bar

val: 129319

""")

        tmpf.seek(0)

        reader = read_stanzas(tmpf)

        read_iter = iter(reader)

        stuff = list(reader)

        self.assertEqual(stuff,

                [ Stanza(version_header='1'),

                  Stanza(name="foo", val='123'),

                  Stanza(name="bar", val='129319'), ])

    def test_read_several(self):

        """Read several stanzas from file"""

        tmpf = TemporaryFile()

        tmpf.write("""\

version_header: 1

name: foo

val: 123

name: quoted

address:   "Willowglen"

\t  42 Wallaby Way

\t  Sydney

name: bar

val: 129319

""")

        tmpf.seek(0)

        s = read_stanza(tmpf)

        self.assertEquals(s, Stanza(version_header='1'))

        s = read_stanza(tmpf)

        self.assertEquals(s, Stanza(name="foo", val='123'))

        s = read_stanza(tmpf)

        self.assertEqualDiff(s.get('name'), 'quoted')

        self.assertEqualDiff(s.get('address'), '  "Willowglen"\n  42 Wallaby Way\n  Sydney')

        s = read_stanza(tmpf)

        self.assertEquals(s, Stanza(name="bar", val='129319'))

        s = read_stanza(tmpf)

        self.assertEquals(s, None)

        self.check_rio_file(tmpf)

    def check_rio_file(self, real_file):

        real_file.seek(0)

        read_write = rio_file(RioReader(real_file)).read()

        real_file.seek(0)

        self.assertEquals(read_write, real_file.read())

    @staticmethod

    def stanzas_to_str(stanzas):

        return rio_file(stanzas).read()

    def rio_file_stanzas(self, stanzas):

        new_stanzas = list(RioReader(rio_file(stanzas)))

        self.assertEqual(new_stanzas, stanzas)

    def test_tricky_quoted(self):

        tmpf = TemporaryFile()

        tmpf.write('''\

s: "one"

s:\x20

\t"one"

\t

s: "

s: ""

s: """

s:\x20

\t

s: \\

s:\x20

\t\\

\t\\\\

\t

s: word\\

s: quote"

s: backslashes\\\\\\

s: both\\\"

''')

        tmpf.seek(0)

        expected_vals = ['"one"',

            '\n"one"\n',

            '"',

            '""',

            '"""',

            '\n',

            '\\',

            '\n\\\n\\\\\n',

            'word\\',

            'quote\"',

            'backslashes\\\\\\',

            'both\\\"',

            ]

        for expected in expected_vals:

            stanza = read_stanza(tmpf)

            self.rio_file_stanzas([stanza])

            self.assertEquals(len(stanza), 1)

            self.assertEqualDiff(stanza.get('s'), expected)

    def test_write_empty_stanza(self):

        """Write empty stanza"""

        l = list(Stanza().to_lines())

        self.assertEquals(l, [])

    def test_rio_raises_type_error(self):

        """TypeError on adding invalid type to Stanza"""

        s = Stanza()

        self.assertRaises(TypeError, s.add, 'foo', {})

    def test_rio_raises_type_error_key(self):

        """TypeError on adding invalid type to Stanza"""

        s = Stanza()

        self.assertRaises(TypeError, s.add, 10, {})

    def test_rio_unicode(self):

        uni_data = u'\N{KATAKANA LETTER O}'

        s = Stanza(foo=uni_data)

        self.assertEquals(s.get('foo'), uni_data)

        raw_lines = s.to_lines()

        self.assertEquals(raw_lines,

                ['foo: ' + uni_data.encode('utf-8') + '\n'])

        new_s = read_stanza(raw_lines)

        self.assertEquals(new_s.get('foo'), uni_data)

    def test_rio_to_unicode(self):

        uni_data = u'\N{KATAKANA LETTER O}'

        s = Stanza(foo=uni_data)

        unicode_str = s.to_unicode()

        self.assertEqual(u'foo: %s\n' % (uni_data,), unicode_str)

        new_s = rio.read_stanza_unicode(unicode_str.splitlines(True))

        self.assertEqual(uni_data, new_s.get('foo'))

    def test_nested_rio_unicode(self):

        uni_data = u'\N{KATAKANA LETTER O}'

        s = Stanza(foo=uni_data)

        parent_stanza = Stanza(child=s.to_unicode())

        raw_lines = parent_stanza.to_lines()

        self.assertEqual(['child: foo: ' + uni_data.encode('utf-8') + '\n',

                          '\t\n',

                         ], raw_lines)

        new_parent = read_stanza(raw_lines)

        child_text = new_parent.get('child')

        self.assertEqual(u'foo: %s\n' % uni_data, child_text)

        new_child = rio.read_stanza_unicode(child_text.splitlines(True))

        self.assertEqual(uni_data, new_child.get('foo'))

    def mail_munge(self, lines, dos_nl=True):

        new_lines = []

        for line in lines:

            line = re.sub(' *\n', '\n', line)

            if dos_nl:

                line = re.sub('([^\r])\n', '\\1\r\n', line)

            new_lines.append(line)

        return new_lines

    def test_patch_rio(self):

        stanza = Stanza(data='#\n\r\\r ', space=' ' * 255, hash='#' * 255)

        lines = rio.to_patch_lines(stanza)

        for line in lines:

            self.assertContainsRe(line, '^# ')

            self.assertTrue(72 >= len(line))

        for line in rio.to_patch_lines(stanza, max_width=12):

            self.assertTrue(12 >= len(line))

        new_stanza = rio.read_patch_stanza(self.mail_munge(lines,

                                                           dos_nl=False))

        lines = self.mail_munge(lines)

        new_stanza = rio.read_patch_stanza(lines)

        self.assertEqual('#\n\r\\r ', new_stanza.get('data'))

        self.assertEqual(' '* 255, new_stanza.get('space'))

        self.assertEqual('#'* 255, new_stanza.get('hash'))

    def test_patch_rio_linebreaks(self):

        stanza = Stanza(breaktest='linebreak -/'*30)

        self.assertContainsRe(rio.to_patch_lines(stanza, 71)[0],

                              'linebreak\\\\\n')

        stanza = Stanza(breaktest='linebreak-/'*30)

        self.assertContainsRe(rio.to_patch_lines(stanza, 70)[0],

                              'linebreak-\\\\\n')

        stanza = Stanza(breaktest='linebreak/'*30)

        self.assertContainsRe(rio.to_patch_lines(stanza, 70)[0],

                              'linebreak\\\\\n')