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#!/usr/bin/env python2.4
# Author: michele.simionato@gmail.com
"""\
Example of usage:
$ doctester.py -v file.txt
"""
import sys, doctest, textwrap, re, types
#import warnings;warnings.filterwarnings('ignore', category=DeprecationWarning)
# regular expressions to identify code blocks of the form
#<scriptname.py> ... </scriptname.py>
DOTNAME = r'\b[a-zA-Z_][\w\.]*', # identifier with or without dots
SCRIPT = re.compile(r'(?s)#<(%s)>(.*?)#</\1>' % DOTNAME)
class file_(file):
"""This is a file class which treats specially the filename "-",
returning stdin or stdout according to the mode."""
def __new__(cls, name, mode="r", buffering=1):
if name == "-" and "w" in mode or "a" in mode:
return sys.stdout
elif name == "-" and "r" in mode:
return sys.stdin
return super(file_, cls).__new__(cls, name, mode, buffering)
# a simple utility to extract the scripts contained in the original text
def scripts(txt):
for MO in SCRIPT.finditer(txt):
yield MO.group(1), textwrap.dedent(MO.group(2))
# save the scripts in the current directory
def savescripts(fname, txt):
scriptdict = {}
for scriptname, script in scripts(txt): # read scripts
if scriptname not in scriptdict:
scriptdict[scriptname] = script
else:
scriptdict[scriptname] += script
for scriptname in scriptdict: # save scripts
code = '# ' + scriptname + scriptdict[scriptname]
print >> file(scriptname, 'w'), code
return scriptdict
# based on a clever trick: it converts the original text into the docstring of
# the _main module; works both for Python 2.3 and 2.4
def runtests(fname, txt, verbose=False):
if "_main.py" in savescripts(fname, txt):
_main = __import__("_main") # real module
else: # dynamic module
_main = types.ModuleType("__main__")
_main.__doc__ = txt
failed, tot = doctest.testmod(_main, verbose=verbose)
doctest.master = None # cleanup the DocTestRunner
# needed to avoid a warning in case of multiple calls of runtests
if not verbose:
print >> sys.stderr, "doctest: run %s tests, failed %s" % (tot, failed)
# remove scripts
return failed, tot
if __name__ == '__main__':
try:
set # need sets for option parsing
except NameError:
import sets; set = sets.Set # for Python 2.3
try:
fname = sys.argv[1]
except IndexError:
sys.exit(__doc__)
valid_options = set("-v -h".split())
options = set(sys.argv[2:])
assert options < valid_options, "Unrecognized option"
if "-h" in options: # print usage message and exit
sys.exit(__doc__)
runtests(fname, file_(fname).read(), "-v" in options)
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