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"""Supporting definitions for the Python regression test."""
import sys
class Error(Exception):
"""Base class for regression test exceptions."""
class TestFailed(Error):
"""Test failed."""
class TestSkipped(Error):
"""Test skipped.
This can be raised to indicate that a test was deliberatly
skipped, but not because a feature wasn't available. For
example, if some resource can't be used, such as the network
appears to be unavailable, this should be raised instead of
TestFailed.
"""
verbose = 1 # Flag set to 0 by regrtest.py
use_resources = None # Flag set to [] by regrtest.py
# _output_comparison controls whether regrtest will try to compare stdout
# with an expected-output file. For straight regrtests, it should.
# The doctest driver should set_output_comparison(0) for the duration, and
# restore the old value when it's done.
# Note that this control is in addition to verbose mode: output will be
# compared if and only if _output_comparison is true and verbose mode is
# not in effect.
_output_comparison = 1
def set_output_comparison(newvalue):
global _output_comparison
oldvalue = _output_comparison
_output_comparison = newvalue
return oldvalue
# regrtest's interface to _output_comparison.
def suppress_output_comparison():
return not _output_comparison
def unload(name):
try:
del sys.modules[name]
except KeyError:
pass
def forget(modname):
unload(modname)
import os
for dirname in sys.path:
try:
os.unlink(os.path.join(dirname, modname + '.pyc'))
except os.error:
pass
def requires(resource, msg=None):
if use_resources is not None and resource not in use_resources:
if msg is None:
msg = "Use of the `%s' resource not enabled" % resource
raise TestSkipped(msg)
FUZZ = 1e-6
def fcmp(x, y): # fuzzy comparison function
if type(x) == type(0.0) or type(y) == type(0.0):
try:
x, y = coerce(x, y)
fuzz = (abs(x) + abs(y)) * FUZZ
if abs(x-y) <= fuzz:
return 0
except:
pass
elif type(x) == type(y) and type(x) in (type(()), type([])):
for i in range(min(len(x), len(y))):
outcome = fcmp(x[i], y[i])
if outcome != 0:
return outcome
return cmp(len(x), len(y))
return cmp(x, y)
try:
unicode
have_unicode = 1
except NameError:
have_unicode = 0
import os
# Filename used for testing
if os.name == 'java':
# Jython disallows @ in module names
TESTFN = '$test'
elif os.name != 'riscos':
TESTFN = '@test'
# Unicode name only used if TEST_FN_ENCODING exists for the platform.
if have_unicode:
TESTFN_UNICODE=unicode("@test-\xe0\xf2", "latin-1") # 2 latin characters.
if os.name=="nt":
TESTFN_ENCODING="mbcs"
else:
TESTFN = 'test'
del os
from os import unlink
def findfile(file, here=__file__):
import os
if os.path.isabs(file):
return file
path = sys.path
path = [os.path.dirname(here)] + path
for dn in path:
fn = os.path.join(dn, file)
if os.path.exists(fn): return fn
return file
def verify(condition, reason='test failed'):
"""Verify that condition is true. If not, raise TestFailed.
The optional argument reason can be given to provide
a better error text.
"""
if not condition:
raise TestFailed(reason)
def sortdict(dict):
"Like repr(dict), but in sorted order."
items = dict.items()
items.sort()
reprpairs = ["%r: %r" % pair for pair in items]
withcommas = ", ".join(reprpairs)
return "{%s}" % withcommas
def check_syntax(statement):
try:
compile(statement, '<string>', 'exec')
except SyntaxError:
pass
else:
print 'Missing SyntaxError: "%s"' % statement
#=======================================================================
# Preliminary PyUNIT integration.
import unittest
class BasicTestRunner:
def run(self, test):
result = unittest.TestResult()
test(result)
return result
def run_suite(suite):
"""Run tests from a unittest.TestSuite-derived class."""
if verbose:
runner = unittest.TextTestRunner(sys.stdout, verbosity=2)
else:
runner = BasicTestRunner()
result = runner.run(suite)
if not result.wasSuccessful():
if len(result.errors) == 1 and not result.failures:
err = result.errors[0][1]
elif len(result.failures) == 1 and not result.errors:
err = result.failures[0][1]
else:
raise TestFailed("errors occurred in %s.%s"
% (testclass.__module__, testclass.__name__))
raise TestFailed(err)
def run_unittest(testclass):
"""Run tests from a unittest.TestCase-derived class."""
run_suite(unittest.makeSuite(testclass))
#=======================================================================
# doctest driver.
def run_doctest(module, verbosity=None):
"""Run doctest on the given module.
If optional argument verbosity is not specified (or is None), pass
test_support's belief about verbosity on to doctest. Else doctest's
usual behavior is used (it searches sys.argv for -v).
"""
import doctest
if verbosity is None:
verbosity = verbose
else:
verbosity = None
oldvalue = set_output_comparison(0)
try:
f, t = doctest.testmod(module, verbose=verbosity)
if f:
raise TestFailed("%d of %d doctests failed" % (f, t))
finally:
set_output_comparison(oldvalue)
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