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import os, glob, random
from cStringIO import StringIO
from test.test_support import (verbose, findfile, is_resource_enabled,
TestFailed)
from tokenize import (tokenize, generate_tokens, untokenize,
NUMBER, NAME, OP, STRING)
# Test roundtrip for `untokenize`. `f` is a file path. The source code in f
# is tokenized, converted back to source code via tokenize.untokenize(),
# and tokenized again from the latter. The test fails if the second
# tokenization doesn't match the first.
def test_roundtrip(f):
## print 'Testing:', f
fobj = open(f)
try:
fulltok = list(generate_tokens(fobj.readline))
finally:
fobj.close()
t1 = [tok[:2] for tok in fulltok]
newtext = untokenize(t1)
readline = iter(newtext.splitlines(1)).next
t2 = [tok[:2] for tok in generate_tokens(readline)]
if t1 != t2:
raise TestFailed("untokenize() roundtrip failed for %r" % f)
# This is an example from the docs, set up as a doctest.
def decistmt(s):
"""Substitute Decimals for floats in a string of statements.
>>> from decimal import Decimal
>>> s = 'print +21.3e-5*-.1234/81.7'
>>> decistmt(s)
"print +Decimal ('21.3e-5')*-Decimal ('.1234')/Decimal ('81.7')"
The format of the exponent is inherited from the platform C library.
Known cases are "e-007" (Windows) and "e-07" (not Windows). Since
we're only showing 12 digits, and the 13th isn't close to 5, the
rest of the output should be platform-independent.
>>> exec(s) #doctest: +ELLIPSIS
-3.21716034272e-0...7
Output from calculations with Decimal should be identical across all
platforms.
>>> exec(decistmt(s))
-3.217160342717258261933904529E-7
"""
result = []
g = generate_tokens(StringIO(s).readline) # tokenize the string
for toknum, tokval, _, _, _ in g:
if toknum == NUMBER and '.' in tokval: # replace NUMBER tokens
result.extend([
(NAME, 'Decimal'),
(OP, '('),
(STRING, repr(tokval)),
(OP, ')')
])
else:
result.append((toknum, tokval))
return untokenize(result)
def test_main():
if verbose:
print 'starting...'
# This displays the tokenization of tokenize_tests.py to stdout, and
# regrtest.py checks that this equals the expected output (in the
# test/output/ directory).
f = open(findfile('tokenize_tests' + os.extsep + 'txt'))
tokenize(f.readline)
f.close()
# Now run test_roundtrip() over tokenize_test.py too, and over all
# (if the "compiler" resource is enabled) or a small random sample (if
# "compiler" is not enabled) of the test*.py files.
f = findfile('tokenize_tests' + os.extsep + 'txt')
test_roundtrip(f)
testdir = os.path.dirname(f) or os.curdir
testfiles = glob.glob(testdir + os.sep + 'test*.py')
if not is_resource_enabled('compiler'):
testfiles = random.sample(testfiles, 10)
for f in testfiles:
test_roundtrip(f)
# Test detecton of IndentationError.
sampleBadText = """\
def foo():
bar
baz
"""
try:
for tok in generate_tokens(StringIO(sampleBadText).readline):
pass
except IndentationError:
pass
else:
raise TestFailed("Did not detect IndentationError:")
# Run the doctests in this module.
from test import test_tokenize # i.e., this module
from test.test_support import run_doctest
run_doctest(test_tokenize)
if verbose:
print 'finished'
if __name__ == "__main__":
test_main()
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