mirror of
https://github.com/python/cpython
synced 2024-10-09 07:20:07 +00:00
1a4d77b252
1. When running in verbose mode, if any test happens to pass, print a warning that the apparent success may be bogus (stdout isn't compared in verbose mode). Been fooled by that too often. 2. When a test fails because the expected stdout doesn't match the actual stdout, print as much of stdout as did match before the first failing write. Else we get failures of the form "expected 'a', got 'b'" and a glance at the expected output file shows 500 instances of 'a' -- no idea where it failed, and, as in #1, trying to run in verbose mode instead doesn't help because stdout isn't compared then.
333 lines
11 KiB
Python
Executable file
333 lines
11 KiB
Python
Executable file
#! /usr/bin/env python
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"""Regression test.
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This will find all modules whose name is "test_*" in the test
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directory, and run them. Various command line options provide
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additional facilities.
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Command line options:
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-v: verbose -- run tests in verbose mode with output to stdout
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-q: quiet -- don't print anything except if a test fails
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-g: generate -- write the output file for a test instead of comparing it
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-x: exclude -- arguments are tests to *exclude*
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-s: single -- run only a single test (see below)
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-r: random -- randomize test execution order
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-l: findleaks -- if GC is available detect tests that leak memory
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--have-resources -- run tests that require large resources (time/space)
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If non-option arguments are present, they are names for tests to run,
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unless -x is given, in which case they are names for tests not to run.
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If no test names are given, all tests are run.
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-v is incompatible with -g and does not compare test output files.
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-s means to run only a single test and exit. This is useful when Purifying
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the Python interpreter. The file /tmp/pynexttest is read to find the next
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test to run. If this file is missing, the first test_*.py file in testdir or
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on the command line is used. (actually tempfile.gettempdir() is used instead
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of /tmp).
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"""
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import sys
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import string
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import os
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import getopt
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import traceback
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import random
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import test_support
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def main(tests=None, testdir=None, verbose=0, quiet=0, generate=0,
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exclude=0, single=0, randomize=0, findleaks=0,
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use_large_resources=0):
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"""Execute a test suite.
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This also parses command-line options and modifies its behavior
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accordingly.
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tests -- a list of strings containing test names (optional)
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testdir -- the directory in which to look for tests (optional)
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Users other than the Python test suite will certainly want to
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specify testdir; if it's omitted, the directory containing the
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Python test suite is searched for.
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If the tests argument is omitted, the tests listed on the
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command-line will be used. If that's empty, too, then all *.py
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files beginning with test_ will be used.
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The other seven default arguments (verbose, quiet, generate, exclude,
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single, randomize, and findleaks) allow programmers calling main()
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directly to set the values that would normally be set by flags on the
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command line.
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"""
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try:
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opts, args = getopt.getopt(sys.argv[1:], 'vgqxsrl', ['have-resources'])
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except getopt.error, msg:
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print msg
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print __doc__
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return 2
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for o, a in opts:
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if o == '-v': verbose = verbose+1
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if o == '-q': quiet = 1; verbose = 0
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if o == '-g': generate = 1
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if o == '-x': exclude = 1
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if o == '-s': single = 1
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if o == '-r': randomize = 1
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if o == '-l': findleaks = 1
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if o == '--have-resources': use_large_resources = 1
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if generate and verbose:
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print "-g and -v don't go together!"
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return 2
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good = []
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bad = []
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skipped = []
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if findleaks:
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try:
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import gc
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except ImportError:
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print 'No GC available, disabling findleaks.'
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findleaks = 0
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else:
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# Uncomment the line below to report garbage that is not
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# freeable by reference counting alone. By default only
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# garbage that is not collectable by the GC is reported.
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#gc.set_debug(gc.DEBUG_SAVEALL)
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found_garbage = []
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if single:
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from tempfile import gettempdir
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filename = os.path.join(gettempdir(), 'pynexttest')
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try:
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fp = open(filename, 'r')
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next = string.strip(fp.read())
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tests = [next]
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fp.close()
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except IOError:
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pass
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for i in range(len(args)):
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# Strip trailing ".py" from arguments
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if args[i][-3:] == '.py':
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args[i] = args[i][:-3]
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stdtests = STDTESTS[:]
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nottests = NOTTESTS[:]
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if exclude:
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for arg in args:
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if arg in stdtests:
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stdtests.remove(arg)
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nottests[:0] = args
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args = []
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tests = tests or args or findtests(testdir, stdtests, nottests)
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if single:
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tests = tests[:1]
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if randomize:
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random.shuffle(tests)
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test_support.verbose = verbose # Tell tests to be moderately quiet
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test_support.use_large_resources = use_large_resources
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save_modules = sys.modules.keys()
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for test in tests:
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if not quiet:
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print test
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ok = runtest(test, generate, verbose, quiet, testdir)
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if ok > 0:
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good.append(test)
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elif ok == 0:
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bad.append(test)
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else:
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skipped.append(test)
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if findleaks:
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gc.collect()
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if gc.garbage:
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print "Warning: test created", len(gc.garbage),
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print "uncollectable object(s)."
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# move the uncollectable objects somewhere so we don't see
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# them again
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found_garbage.extend(gc.garbage)
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del gc.garbage[:]
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# Unload the newly imported modules (best effort finalization)
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for module in sys.modules.keys():
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if module not in save_modules and module.startswith("test."):
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test_support.unload(module)
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if good and not quiet:
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if not bad and not skipped and len(good) > 1:
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print "All",
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print count(len(good), "test"), "OK."
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if verbose:
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print "CAUTION: stdout isn't compared in verbose mode: a test"
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print "that passes in verbose mode may fail without it."
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if bad:
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print count(len(bad), "test"), "failed:",
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print string.join(bad)
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if skipped and not quiet:
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print count(len(skipped), "test"), "skipped:",
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print string.join(skipped)
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if single:
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alltests = findtests(testdir, stdtests, nottests)
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for i in range(len(alltests)):
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if tests[0] == alltests[i]:
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if i == len(alltests) - 1:
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os.unlink(filename)
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else:
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fp = open(filename, 'w')
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fp.write(alltests[i+1] + '\n')
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fp.close()
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break
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else:
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os.unlink(filename)
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return len(bad) > 0
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STDTESTS = [
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'test_grammar',
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'test_opcodes',
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'test_operations',
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'test_builtin',
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'test_exceptions',
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'test_types',
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]
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NOTTESTS = [
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'test_support',
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'test_b1',
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'test_b2',
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]
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def findtests(testdir=None, stdtests=STDTESTS, nottests=NOTTESTS):
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"""Return a list of all applicable test modules."""
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if not testdir: testdir = findtestdir()
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names = os.listdir(testdir)
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tests = []
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for name in names:
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if name[:5] == "test_" and name[-3:] == ".py":
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modname = name[:-3]
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if modname not in stdtests and modname not in nottests:
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tests.append(modname)
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tests.sort()
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return stdtests + tests
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def runtest(test, generate, verbose, quiet, testdir = None):
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"""Run a single test.
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test -- the name of the test
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generate -- if true, generate output, instead of running the test
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and comparing it to a previously created output file
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verbose -- if true, print more messages
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quiet -- if true, don't print 'skipped' messages (probably redundant)
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testdir -- test directory
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"""
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test_support.unload(test)
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if not testdir: testdir = findtestdir()
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outputdir = os.path.join(testdir, "output")
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outputfile = os.path.join(outputdir, test)
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try:
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if generate:
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cfp = open(outputfile, "w")
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elif verbose:
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cfp = sys.stdout
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else:
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cfp = Compare(outputfile)
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except IOError:
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cfp = None
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print "Warning: can't open", outputfile
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try:
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save_stdout = sys.stdout
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try:
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if cfp:
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sys.stdout = cfp
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print test # Output file starts with test name
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__import__(test, globals(), locals(), [])
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if cfp and not (generate or verbose):
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cfp.close()
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finally:
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sys.stdout = save_stdout
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except (ImportError, test_support.TestSkipped), msg:
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if not quiet:
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print "test", test,
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print "skipped -- ", msg
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return -1
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except KeyboardInterrupt:
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raise
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except test_support.TestFailed, msg:
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print "test", test, "failed --", msg
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return 0
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except:
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type, value = sys.exc_info()[:2]
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print "test", test, "crashed --", str(type) + ":", value
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if verbose:
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traceback.print_exc(file=sys.stdout)
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return 0
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else:
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return 1
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def findtestdir():
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if __name__ == '__main__':
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file = sys.argv[0]
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else:
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file = __file__
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testdir = os.path.dirname(file) or os.curdir
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return testdir
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def count(n, word):
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if n == 1:
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return "%d %s" % (n, word)
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else:
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return "%d %ss" % (n, word)
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class Compare:
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def __init__(self, filename):
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self.fp = open(filename, 'r')
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self.stuffthatmatched = []
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def write(self, data):
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expected = self.fp.read(len(data))
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if data == expected:
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self.stuffthatmatched.append(expected)
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else:
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# This Compare instance is spoofing stdout, so we need to write
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# to stderr instead.
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from sys import stderr as e
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print >> e, "The actual stdout doesn't match the expected stdout."
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if self.stuffthatmatched:
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print >> e, "This much did match (between asterisk lines):"
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print >> e, "*" * 70
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good = "".join(self.stuffthatmatched)
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e.write(good)
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if not good.endswith("\n"):
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e.write("\n")
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print >> e, "*" * 70
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print >> e, "Then ..."
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else:
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print >> e, "The first write to stdout clashed:"
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# Note that the prompts are the same length in next two lines.
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# This is so what we expected and what we got line up.
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print >> e, "We expected (repr):", `expected`
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print >> e, "But instead we got:", `data`
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raise test_support.TestFailed('Writing: ' + `data`+
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', expected: ' + `expected`)
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def writelines(self, listoflines):
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map(self.write, listoflines)
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def flush(self):
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pass
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def close(self):
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leftover = self.fp.read()
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if leftover:
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raise test_support.TestFailed('Tail of expected stdout unseen: ' +
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`leftover`)
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self.fp.close()
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def isatty(self):
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return 0
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if __name__ == '__main__':
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sys.exit(main())
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