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75 lines
2.2 KiB
Python
75 lines
2.2 KiB
Python
from __future__ import absolute_import
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import os
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import re
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import textwrap
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from sybil import Region
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from testfixtures import diff
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FILEBLOCK_START = re.compile(r'^\.\.\s*topic::?\s*(.+)\b', re.MULTILINE)
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FILEBLOCK_END = re.compile(r'(\n\Z|\n(?=\S))')
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CLASS = re.compile(r'\s+:class:\s*(read|write)-file')
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class FileBlock(object):
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def __init__(self, path, content, action):
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self.path, self.content, self.action = path, content, action
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class FileParser(object):
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"""
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A `Sybil <http://sybil.readthedocs.io>`__ parser that
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parses certain ReST sections to read and write files in the
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configured :class:`TempDirectory`.
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:param name: This is the name of the :class:`TempDirectory` to use
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in the Sybil test namespace.
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"""
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def __init__(self, name):
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self.name = name
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def __call__(self, document):
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for start_match, end_match, source in document.find_region_sources(
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FILEBLOCK_START, FILEBLOCK_END
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):
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lines = source.splitlines()
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class_ = CLASS.match(lines[1])
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if not class_:
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continue
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index = 3
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if lines[index].strip() == '::':
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index += 1
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source = textwrap.dedent('\n'.join(lines[index:])).lstrip()
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if source[-1] != '\n':
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source += '\n'
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parsed = FileBlock(
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path=start_match.group(1),
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content=source,
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action=class_.group(1)
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)
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yield Region(
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start_match.start(),
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end_match.end(),
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parsed,
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self.evaluate
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)
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def evaluate(self, example):
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block = example.parsed
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dir = example.namespace[self.name]
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if block.action == 'read':
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actual = dir.read(block.path, 'ascii').replace(os.linesep, '\n')
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if actual != block.content:
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return diff(
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block.content,
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actual,
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'File %r, line %i:' % (example.path, example.line),
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'Reading from "%s":' % dir.getpath(block.path)
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)
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if block.action == 'write':
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dir.write(block.path, block.content, 'ascii')
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