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from __future__ import absolute_import
# Copyright (c) 2010-2013 Simplistix Ltd
#
# See license.txt for more details.
import os
import re
import textwrap
from manuel import Manuel
from testfixtures import diff
FILEBLOCK_START = re.compile(r'^\.\.\s*topic::?\s*(.+)\b', re.MULTILINE)
FILEBLOCK_END = re.compile(r'(\n\Z|\n(?=\S))')
CLASS = re.compile(r'\s+:class:\s*(read|write)-file')
class FileBlock(object):
def __init__(self, path, content, action):
self.path, self.content, self.action = path, content, action
class FileResult(object):
passed = True
expected = None
actual = None
class Files(Manuel):
"""
A `Manuel <http://packages.python.org/manuel/>`__ plugin that
parses certain ReST sections to read and write files in the
configured :class:`TempDirectory`.
:param name: This is the name of the :class:`TempDirectory` to use
in the Manual global namespace (ie: `globs`).
"""
def __init__(self, name):
self.name = name
Manuel.__init__(self,
parsers=[self.parse],
evaluaters=[self.evaluate],
formatters=[self.format])
def parse(self, document):
for region in document.find_regions(FILEBLOCK_START, FILEBLOCK_END):
lines = region.source.splitlines()
class_ = CLASS.match(lines[1])
if not class_:
continue
index = 3
if lines[index].strip() == '::':
index += 1
source = textwrap.dedent('\n'.join(lines[index:])).lstrip()
if source[-1] != '\n':
source += '\n'
region.parsed = FileBlock(
region.start_match.group(1),
source,
class_.group(1)
)
document.claim_region(region)
def evaluate(self, region, document, globs):
if not isinstance(region.parsed, FileBlock):
return
block = region.parsed
dir = globs[self.name]
result = region.evaluated = FileResult()
if block.action == 'read':
actual = dir.read(block.path, 'ascii').replace(os.linesep, '\n')
if actual != block.content:
result.passed = False
result.path = block.path
result.expected = block.content
result.actual = actual
if block.action == 'write':
dir.write(block.path, block.content, 'ascii')
def format(self, document):
for region in document:
result = region.evaluated
if not isinstance(result, FileResult):
continue
if not result.passed:
region.formatted = diff(
result.expected,
result.actual,
'File "%s", line %i:' % (document.location, region.lineno),
'Reading from "%s":' % result.path
)
return