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cpython/Lib/test/bisect_cmd.py at 3.7 · python-emscripten/cpython · GitHub
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test
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bisect_cmd.py
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cpython
/
Lib
/
test
/
bisect_cmd.py
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167 lines (133 loc) · 4.85 KB
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#!/usr/bin/env python3
"""
Command line tool to bisect failing CPython tests.
Find the test_os test method which alters the environment:
./python -m test.bisect_cmd --fail-env-changed test_os
Find a reference leak in "test_os", write the list of failing tests into the
"bisect" file:
./python -m test.bisect_cmd -o bisect -R 3:3 test_os
Load an existing list of tests from a file using -i option:
./python -m test --list-cases -m FileTests test_os > tests
./python -m test.bisect_cmd -i tests test_os
"""
import
argparse
import
datetime
import
os
.
path
import
math
import
random
import
subprocess
import
sys
import
tempfile
import
time
def
write_tests
(
filename
,
tests
):
with
open
(
filename
,
"w"
)
as
fp
:
for
name
in
tests
:
print
(
name
,
file
=
fp
)
fp
.
flush
()
def
write_output
(
filename
,
tests
):
if
not
filename
:
return
print
(
"Writing %s tests into %s"
%
(
len
(
tests
),
filename
))
write_tests
(
filename
,
tests
)
return
filename
def
format_shell_args
(
args
):
return
' '
.
join
(
args
)
def
list_cases
(
args
):
cmd
=
[
sys
.
executable
,
'-m'
,
'test'
,
'--list-cases'
]
cmd
.
extend
(
args
.
test_args
)
proc
=
subprocess
.
run
(
cmd
,
stdout
=
subprocess
.
PIPE
,
universal_newlines
=
True
)
exitcode
=
proc
.
returncode
if
exitcode
:
cmd
=
format_shell_args
(
cmd
)
print
(
"Failed to list tests: %s failed with exit code %s"
%
(
cmd
,
exitcode
))
sys
.
exit
(
exitcode
)
tests
=
proc
.
stdout
.
splitlines
()
return
tests
def
run_tests
(
args
,
tests
,
huntrleaks
=
None
):
tmp
=
tempfile
.
mktemp
()
try
:
write_tests
(
tmp
,
tests
)
cmd
=
[
sys
.
executable
,
'-m'
,
'test'
,
'--matchfile'
,
tmp
]
cmd
.
extend
(
args
.
test_args
)
print
(
"+ %s"
%
format_shell_args
(
cmd
))
proc
=
subprocess
.
run
(
cmd
)
return
proc
.
returncode
finally
:
if
os
.
path
.
exists
(
tmp
):
os
.
unlink
(
tmp
)
def
parse_args
():
parser
=
argparse
.
ArgumentParser
()
parser
.
add_argument
(
'-i'
,
'--input'
,
help
=
'Test names produced by --list-tests written '
'into a file. If not set, run --list-tests'
)
parser
.
add_argument
(
'-o'
,
'--output'
,
help
=
'Result of the bisection'
)
parser
.
add_argument
(
'-n'
,
'--max-tests'
,
type
=
int
,
default
=
1
,
help
=
'Maximum number of tests to stop the bisection '
'(default: 1)'
)
parser
.
add_argument
(
'-N'
,
'--max-iter'
,
type
=
int
,
default
=
100
,
help
=
'Maximum number of bisection iterations '
'(default: 100)'
)
# FIXME: document that following arguments are test arguments
args
,
test_args
=
parser
.
parse_known_args
()
args
.
test_args
=
test_args
return
args
def
main
():
args
=
parse_args
()
if
args
.
input
:
with
open
(
args
.
input
)
as
fp
:
tests
=
[
line
.
strip
()
for
line
in
fp
]
else
:
tests
=
list_cases
(
args
)
print
(
"Start bisection with %s tests"
%
len
(
tests
))
print
(
"Test arguments: %s"
%
format_shell_args
(
args
.
test_args
))
print
(
"Bisection will stop when getting %s or less tests "
"(-n/--max-tests option), or after %s iterations "
"(-N/--max-iter option)"
%
(
args
.
max_tests
,
args
.
max_iter
))
output
=
write_output
(
args
.
output
,
tests
)
print
()
start_time
=
time
.
monotonic
()
iteration
=
1
try
:
while
len
(
tests
)
>
args
.
max_tests
and
iteration
<=
args
.
max_iter
:
ntest
=
len
(
tests
)
ntest
=
max
(
ntest
//
2
,
1
)
subtests
=
random
.
sample
(
tests
,
ntest
)
print
(
"[+] Iteration %s: run %s tests/%s"
%
(
iteration
,
len
(
subtests
),
len
(
tests
)))
print
()
exitcode
=
run_tests
(
args
,
subtests
)
print
(
"ran %s tests/%s"
%
(
ntest
,
len
(
tests
)))
print
(
"exit"
,
exitcode
)
if
exitcode
:
print
(
"Tests failed: continuing with this subtest"
)
tests
=
subtests
output
=
write_output
(
args
.
output
,
tests
)
else
:
print
(
"Tests succeeded: skipping this subtest, trying a new subset"
)
print
()
iteration
+=
1
except
KeyboardInterrupt
:
print
()
print
(
"Bisection interrupted!"
)
print
()
print
(
"Tests (%s):"
%
len
(
tests
))
for
test
in
tests
:
print
(
"* %s"
%
test
)
print
()
if
output
:
print
(
"Output written into %s"
%
output
)
dt
=
math
.
ceil
(
time
.
monotonic
()
-
start_time
)
if
len
(
tests
)
<=
args
.
max_tests
:
print
(
"Bisection completed in %s iterations and %s"
%
(
iteration
,
datetime
.
timedelta
(
seconds
=
dt
)))
sys
.
exit
(
1
)
else
:
print
(
"Bisection failed after %s iterations and %s"
%
(
iteration
,
datetime
.
timedelta
(
seconds
=
dt
)))
if
__name__
==
"__main__"
:
main
()
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