~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2011 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 of the bzrlib.utextwrap."""

from bzrlib import tests, utextwrap

from bzrlib.tests import TestSkipped

# Japanese "Good morning".

# Each character have double width. So total 8 width on console.

_str_D = u'\u304a\u306f\u3088\u3046'

_str_S = u"hello"

# Combine single width characters and double width characters.

_str_SD = _str_S + _str_D

_str_DS = _str_D + _str_S

class TestUTextWrap(tests.TestCase):

    def check_width(self, text, expected_width):

        w = utextwrap.UTextWrapper()

        self.assertEqual(

                w._width(text),

                expected_width,

                "Width of %r should be %d" % (text, expected_width))

    def test_width(self):

        self.check_width(_str_D, 8)

        self.check_width(_str_SD, 13)

    def check_cut(self, text, width, pos):

        w = utextwrap.UTextWrapper()

        self.assertEqual((text[:pos], text[pos:]), w._cut(text, width))

    def test_cut(self):

        s = _str_SD

        self.check_cut(s, 0, 0)

        self.check_cut(s, 1, 1)

        self.check_cut(s, 5, 5)

        self.check_cut(s, 6, 5)

        self.check_cut(s, 7, 6)

        self.check_cut(s, 12, 8)

        self.check_cut(s, 13, 9)

        self.check_cut(s, 14, 9)

        self.check_cut(u'A'*5, 3, 3)

    def test_split(self):

        w = utextwrap.UTextWrapper()

        self.assertEqual(list(_str_D), w._split(_str_D))

        self.assertEqual([_str_S]+list(_str_D), w._split(_str_SD))

        self.assertEqual(list(_str_D)+[_str_S], w._split(_str_DS))

    def test_wrap(self):

        self.assertEqual(list(_str_D), utextwrap.wrap(_str_D, 1))

        self.assertEqual(list(_str_D), utextwrap.wrap(_str_D, 2))

        self.assertEqual(list(_str_D), utextwrap.wrap(_str_D, 3))

        self.assertEqual(list(_str_D),

                         utextwrap.wrap(_str_D, 3, break_long_words=False))

class TestUTextFill(tests.TestCase):

    def test_fill_simple(self):

        # Test only can call fill() because it's just '\n'.join(wrap(text)).

        self.assertEqual("%s\n%s" % (_str_D[:2], _str_D[2:]),

                         utextwrap.fill(_str_D, 4))

    def test_fill_with_breaks(self):

        # Demonstrate complicated case.

        text = u"spam ham egg spamhamegg" + _str_D + u" spam" + _str_D*2

        self.assertEqual(u'\n'.join(["spam ham",

                                     "egg spam",

                                     "hamegg" + _str_D[0],

                                     _str_D[1:],

                                     "spam" + _str_D[:2],

                                     _str_D[2:]+_str_D[:2],

                                     _str_D[2:]]),

                         utextwrap.fill(text, 8))

    def test_fill_without_breaks(self):

        text = u"spam ham egg spamhamegg" + _str_D + u" spam" + _str_D*2

        self.assertEqual(u'\n'.join(["spam ham",

                                     "egg",

                                     "spamhamegg", 

                                     # border between single width and double

                                     # width.

                                     _str_D,

                                     "spam" + _str_D[:2],

                                     _str_D[2:]+_str_D[:2],

                                     _str_D[2:]]),

                         utextwrap.fill(text, 8, break_long_words=False))

    def test_fill_indent_with_breaks(self):

        w = utextwrap.UTextWrapper(8, initial_indent=' '*4,

                                   subsequent_indent=' '*4)

        self.assertEqual(u'\n'.join(["    hell",

                                     "    o" + _str_D[0],

                                     "    " + _str_D[1:3],

                                     "    " + _str_D[3]

                                     ]),

                         w.fill(_str_SD))

    def test_fill_indent_without_breaks(self):

        w = utextwrap.UTextWrapper(8, initial_indent=' '*4,

                                   subsequent_indent=' '*4)

        w.break_long_words = False

        self.assertEqual(u'\n'.join(["    hello",

                                     "    " + _str_D[:2],

                                     "    " + _str_D[2:],

                                     ]),

                         w.fill(_str_SD))

    def test_fill_indent_without_breaks_with_fixed_width(self):

        w = utextwrap.UTextWrapper(8, initial_indent=' '*4,

                                   subsequent_indent=' '*4)

        w.break_long_words = False

        w.width = 3

        self.assertEqual(u'\n'.join(["    hello",

                                     "    " + _str_D[0],

                                     "    " + _str_D[1],

                                     "    " + _str_D[2],

                                     "    " + _str_D[3],

                                     ]),

                         w.fill(_str_SD))

class TestUTextWrapAmbiWidth(tests.TestCase):

    _cyrill_char = u"\u0410" # east_asian_width() == 'A'

    def test_ambiwidth1(self):

        w = utextwrap.UTextWrapper(4, ambiguous_width=1)

        s = self._cyrill_char*8

        self.assertEqual([self._cyrill_char*4]*2, w.wrap(s))

    def test_ambiwidth2(self):

        w = utextwrap.UTextWrapper(4, ambiguous_width=2)

        s = self._cyrill_char*8

        self.assertEqual([self._cyrill_char*2]*4, w.wrap(s))

# Regression test with Python's test_textwrap

# Note that some distribution including Ubuntu doesn't install

# Python's test suite.

try:

    from test import test_textwrap

    def override_textwrap_symbols(testcase):

        # Override the symbols imported by test_textwrap so it uses our own

        # replacements.

        testcase.overrideAttr(test_textwrap, 'TextWrapper',

                              utextwrap.UTextWrapper)

        testcase.overrideAttr(test_textwrap, 'wrap', utextwrap.wrap)

        testcase.overrideAttr(test_textwrap, 'fill', utextwrap.fill)

    def setup_both(testcase, base_class, reused_class):

        super(base_class, testcase).setUp()

        override_textwrap_symbols(testcase)

        reused_class.setUp(testcase)

    class TestWrap(tests.TestCase, test_textwrap.WrapTestCase):

        def setUp(self):

            setup_both(self, TestWrap, test_textwrap.WrapTestCase)

    class TestLongWord(tests.TestCase, test_textwrap.LongWordTestCase):

        def setUp(self):

            setup_both(self, TestLongWord, test_textwrap.LongWordTestCase)

    class TestIndent(tests.TestCase, test_textwrap.IndentTestCases):

        def setUp(self):

            setup_both(self, TestIndent, test_textwrap.IndentTestCases)

except ImportError:

    class TestWrap(tests.TestCase):

        def test_wrap(self):

            raise TestSkipped("test.test_textwrap is not avialable.")

    class TestLongWord(tests.TestCase):

        def test_longword(self):

            raise TestSkipped("test.test_textwrap is not avialable.")

    class TestIndent(tests.TestCase):

        def test_indent(self):

            raise TestSkipped("test.test_textwrap is not avialable.")