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Issue #20750, Enable roundtrip tests for new 5-tuple untokenize. The 

constructed examples and all but 7 of the test/test_*.py files (run with -ucpu)
pass. Remove those that fail the new test from the selection list.
Patch partly based on patches by G. Brandl (#8478) and G. Rees (#12691).
This commit is contained in:
Terry Jan Reedy 2014-02-23 18:00:31 -05:00
parent 220cc21cec
commit 938ba685dc
1 changed files with 38 additions and 14 deletions
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52
Lib/test/test_tokenize.py
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@ -578,9 +578,15 @@ pass the '-ucpu' option to process the full directory.
>>> tempdir = os.path.dirname(f) or os.curdir
>>> testfiles = glob.glob(os.path.join(tempdir, "test*.py"))
tokenize is broken on test_pep3131.py because regular expressions are broken on
the obscure unicode identifiers in it. *sigh*
Tokenize is broken on test_pep3131.py because regular expressions are
broken on the obscure unicode identifiers in it. *sigh*
With roundtrip extended to test the 5-tuple mode of untokenize,
7 more testfiles fail. Remove them also until the failure is diagnosed.
>>> testfiles.remove(os.path.join(tempdir, "test_pep3131.py"))
>>> for f in ('buffer', 'builtin', 'fileio', 'inspect', 'os', 'platform', 'sys'):
... testfiles.remove(os.path.join(tempdir, "test_%s.py") % f)
...
>>> if not support.is_resource_enabled("cpu"):
... testfiles = random.sample(testfiles, 10)
...
@ -659,21 +665,39 @@ def dump_tokens(s):
def roundtrip(f):
"""
Test roundtrip for `untokenize`. `f` is an open file or a string.
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.
The source code in f is tokenized to both 5- and 2-tuples.
Both sequences are converted back to source code via
tokenize.untokenize(), and the latter tokenized again to 2-tuples.
The test fails if the 3 pair tokenizations do not match.
When untokenize bugs are fixed, untokenize with 5-tuples should
reproduce code that does not contain a backslash continuation
following spaces. A proper test should test this.
This function would be more useful for correcting bugs if it reported
the first point of failure, like assertEqual, rather than just
returning False -- or if it were only used in unittests and not
doctest and actually used assertEqual.
"""
# Get source code and original tokenizations
if isinstance(f, str):
f = BytesIO(f.encode('utf-8'))
try:
token_list = list(tokenize(f.readline))
finally:
code = f.encode('utf-8')
else:
code = f.read()
f.close()
tokens1 = [tok[:2] for tok in token_list]
new_bytes = untokenize(tokens1)
readline = (line for line in new_bytes.splitlines(keepends=True)).__next__
tokens2 = [tok[:2] for tok in tokenize(readline)]
return tokens1 == tokens2
readline = iter(code.splitlines(keepends=True)).__next__
tokens5 = list(tokenize(readline))
tokens2 = [tok[:2] for tok in tokens5]
# Reproduce tokens2 from pairs
bytes_from2 = untokenize(tokens2)
readline2 = iter(bytes_from2.splitlines(keepends=True)).__next__
tokens2_from2 = [tok[:2] for tok in tokenize(readline2)]
# Reproduce tokens2 from 5-tuples
bytes_from5 = untokenize(tokens5)
readline5 = iter(bytes_from5.splitlines(keepends=True)).__next__
tokens2_from5 = [tok[:2] for tok in tokenize(readline5)]
# Compare 3 versions
return tokens2 == tokens2_from2 == tokens2_from5
# This is an example from the docs, set up as a doctest.
def decistmt(s):