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Add the ability to control the random seed used by regrtest.py -r.

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This adds a --randseed option, and makes regrtest.py -r indicate what random seed it's using so that that value can later be fed back to --randseed. This option is useful for tracking down test order-related issues found by make buildbottest, for example.
This commit is contained in:
Collin Winter 2009-03-29 03:44:19 +00:00
parent 097aafdde6
commit a199f01986
1 changed files with 15 additions and 3 deletions
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18
Lib/test/regrtest.py
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@ -31,6 +31,10 @@ If non-option arguments are present, they are names for tests to run,
unless -x is given, in which case they are names for tests not to run.
If no test names are given, all tests are run.
-r randomizes test execution order. You can use --randseed=int to provide a
int seed value for the randomizer; this is useful for reproducing troublesome
test orders.
-T turns on code coverage tracing with the trace module.
-D specifies the directory where coverage files are put.
@ -183,7 +187,8 @@ def usage(code, msg=''):
def main(tests=None, testdir=None, verbose=0, quiet=False,
exclude=False, single=False, randomize=False, fromfile=None,
findleaks=False, use_resources=None, trace=False, coverdir='coverage',
runleaks=False, huntrleaks=False, verbose2=False, print_slow=False):
runleaks=False, huntrleaks=False, verbose2=False, print_slow=False,
random_seed=None):
"""Execute a test suite.
This also parses command-line options and modifies its behavior
@ -201,8 +206,8 @@ def main(tests=None, testdir=None, verbose=0, quiet=False,
files beginning with test_ will be used.
The other default arguments (verbose, quiet, exclude,
single, randomize, findleaks, use_resources, trace, coverdir, and
print_slow) allow programmers calling main() directly to set the
single, randomize, findleaks, use_resources, trace, coverdir, print_slow and
random_seed) allow programmers calling main() directly to set the
values that would normally be set by flags on the command line.
"""
@ -214,11 +219,14 @@ def main(tests=None, testdir=None, verbose=0, quiet=False,
'findleaks', 'use=', 'threshold=', 'trace',
'coverdir=', 'nocoverdir', 'runleaks',
'huntrleaks=', 'verbose2', 'memlimit=',
'randseed='
])
except getopt.error, msg:
usage(2, msg)
# Defaults
if random_seed is None:
random_seed = random.randrange(10000000)
if use_resources is None:
use_resources = []
for o, a in opts:
@ -239,6 +247,8 @@ def main(tests=None, testdir=None, verbose=0, quiet=False,
print_slow = True
elif o in ('-r', '--randomize'):
randomize = True
elif o == '--randseed':
random_seed = int(a)
elif o in ('-f', '--fromfile'):
fromfile = a
elif o in ('-l', '--findleaks'):
@ -347,6 +357,8 @@ def main(tests=None, testdir=None, verbose=0, quiet=False,
if single:
tests = tests[:1]
if randomize:
random.seed(random_seed)
print "Using random seed", random_seed
random.shuffle(tests)
if trace:
import trace