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# Copyright (C) 2008 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
import StringIO
from bzrlib import errors, filters
from bzrlib.filters import (
ContentFilter,
ContentFilterContext,
filtered_input_file,
filtered_output_bytes,
_get_filter_stack_for,
_get_registered_names,
internal_size_sha_file_byname,
register_filter_stack_map,
)
from bzrlib.osutils import sha_string
from bzrlib.tests import TestCase, TestCaseInTempDir
# sample filter stacks
def _swapcase(chunks, context=None):
return [s.swapcase() for s in chunks]
def _addjunk(chunks):
return ['junk\n'] + [s for s in chunks]
def _deljunk(chunks, context):
return [s for s in chunks[1:]]
_stack_1 = [
ContentFilter(_swapcase, _swapcase),
]
_stack_2 = [
ContentFilter(_swapcase, _swapcase),
ContentFilter(_addjunk, _deljunk),
]
# sample data
_sample_external = ['Hello\n', 'World\n']
_internal_1 = ['hELLO\n', 'wORLD\n']
_internal_2 = ['junk\n', 'hELLO\n', 'wORLD\n']
class TestContentFilterContext(TestCase):
def test_empty_filter_context(self):
ctx = ContentFilterContext()
self.assertEqual(None, ctx.relpath())
def test_filter_context_with_path(self):
ctx = ContentFilterContext('foo/bar')
self.assertEquals('foo/bar', ctx.relpath())
class TestFilteredInput(TestCase):
def test_filtered_input_file(self):
# test an empty stack returns the same result
external = ''.join(_sample_external)
f = StringIO.StringIO(external)
self.assertEqual(external, filtered_input_file(f, None).read())
# test a single item filter stack
f = StringIO.StringIO(external)
expected = ''.join(_internal_1)
self.assertEqual(expected, filtered_input_file(f, _stack_1).read())
# test a multi item filter stack
f = StringIO.StringIO(external)
expected = ''.join(_internal_2)
self.assertEqual(expected, filtered_input_file(f, _stack_2).read())
class TestFilteredOutput(TestCase):
def test_filtered_output_bytes(self):
# test an empty stack returns the same result
self.assertEqual(_sample_external, list(filtered_output_bytes(
_sample_external, None)))
# test a single item filter stack
self.assertEqual(_sample_external, list(filtered_output_bytes(
_internal_1, _stack_1)))
# test a multi item filter stack
self.assertEqual(_sample_external, list(filtered_output_bytes(
_internal_2, _stack_2)))
class TestFilteredSha(TestCaseInTempDir):
def test_filtered_size_sha(self):
# check that the size and sha matches what's expected
text = 'Foo Bar Baz\n'
a = open('a', 'wb')
a.write(text)
a.close()
post_filtered_content = ''.join(_swapcase([text], None))
expected_len = len(post_filtered_content)
expected_sha = sha_string(post_filtered_content)
self.assertEqual((expected_len,expected_sha),
internal_size_sha_file_byname('a',
[ContentFilter(_swapcase, _swapcase)]))
class TestFilterStackMaps(TestCase):
def _register_map(self, pref, stk1, stk2):
def stk_lookup(key):
return {'v1': stk1, 'v2': stk2}.get(key)
register_filter_stack_map(pref, stk_lookup)
def test_filter_stack_maps(self):
# Save the current registry
original_registry = filters._reset_registry()
try:
# Test registration
a_stack = [ContentFilter('b', 'c')]
z_stack = [ContentFilter('y', 'x'), ContentFilter('w', 'v')]
self._register_map('foo', a_stack, z_stack)
self.assertEqual(['foo'], _get_registered_names())
self._register_map('bar', z_stack, a_stack)
self.assertEqual(['bar', 'foo'], _get_registered_names())
# Test re-registration raises an error
self.assertRaises(errors.BzrError, self._register_map,
'foo', [], [])
finally:
# Restore the real registry
filters._reset_registry(original_registry)
def test_get_filter_stack_for(self):
# Save the current registry
original_registry = filters._reset_registry()
try:
# Test filter stack lookup
a_stack = [ContentFilter('b', 'c')]
d_stack = [ContentFilter('d', 'D')]
z_stack = [ContentFilter('y', 'x'), ContentFilter('w', 'v')]
self._register_map('foo', a_stack, z_stack)
self._register_map('bar', d_stack, z_stack)
prefs = (('foo','v1'),)
self.assertEqual(a_stack, _get_filter_stack_for(prefs))
prefs = (('foo','v2'),)
self.assertEqual(z_stack, _get_filter_stack_for(prefs))
prefs = (('foo','v1'), ('bar','v1'))
self.assertEqual(a_stack + d_stack, _get_filter_stack_for(prefs))
# Test an unknown preference
prefs = (('baz','v1'),)
self.assertEqual([], _get_filter_stack_for(prefs))
# Test an unknown value
prefs = (('foo','v3'),)
self.assertEqual([], _get_filter_stack_for(prefs))
# Test a value of None is skipped
prefs = (('foo',None), ('bar', 'v1'))
self.assertEqual(d_stack, _get_filter_stack_for(prefs))
finally:
# Restore the real registry
filters._reset_registry(original_registry)
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