# Tests invocation of the interpreter with various command line arguments
# All tests are executed with environment variables ignored
# See test_cmd_line_script.py for testing of script execution
import test.test_support
import sys
import unittest
from test.script_helper import (
assert_python_ok, assert_python_failure, spawn_python, kill_python,
python_exit_code
)
class CmdLineTest(unittest.TestCase):
def start_python(self, *args):
p = spawn_python(*args)
return kill_python(p)
def exit_code(self, *args):
return python_exit_code(*args)
def test_directories(self):
self.assertNotEqual(self.exit_code('.'), 0)
self.assertNotEqual(self.exit_code('< .'), 0)
def verify_valid_flag(self, cmd_line):
data = self.start_python(cmd_line)
self.assertTrue(data == '' or data.endswith('\n'))
self.assertNotIn('Traceback', data)
def test_optimize(self):
self.verify_valid_flag('-O')
self.verify_valid_flag('-OO')
def test_q(self):
self.verify_valid_flag('-Qold')
self.verify_valid_flag('-Qnew')
self.verify_valid_flag('-Qwarn')
self.verify_valid_flag('-Qwarnall')
def test_site_flag(self):
self.verify_valid_flag('-S')
def test_usage(self):
self.assertIn('usage', self.start_python('-h'))
def test_version(self):
version = 'Python %d.%d' % sys.version_info[:2]
self.assertTrue(self.start_python('-V').startswith(version))
def test_run_module(self):
# Test expected operation of the '-m' switch
# Switch needs an argument
self.assertNotEqual(self.exit_code('-m'), 0)
# Check we get an error for a nonexistent module
self.assertNotEqual(
self.exit_code('-m', 'fnord43520xyz'),
0)
# Check the runpy module also gives an error for
# a nonexistent module
self.assertNotEqual(
self.exit_code('-m', 'runpy', 'fnord43520xyz'),
0)
# All good if module is located and run successfully
self.assertEqual(
self.exit_code('-m', 'timeit', '-n', '1'),
0)
def test_run_module_bug1764407(self):
# -m and -i need to play well together
# Runs the timeit module and checks the __main__
# namespace has been populated appropriately
p = spawn_python('-i', '-m', 'timeit', '-n', '1')
p.stdin.write('Timer\n')
p.stdin.write('exit()\n')
data = kill_python(p)
self.assertTrue(data.startswith('1 loop'))
self.assertIn('__main__.Timer', data)
def test_run_code(self):
# Test expected operation of the '-c' switch
# Switch needs an argument
self.assertNotEqual(self.exit_code('-c'), 0)
# Check we get an error for an uncaught exception
self.assertNotEqual(
self.exit_code('-c', 'raise Exception'),
0)
# All good if execution is successful
self.assertEqual(
self.exit_code('-c', 'pass'),
0)
def test_hash_randomization(self):
# Verify that -R enables hash randomization:
self.verify_valid_flag('-R')
hashes = []
for i in range(2):
code = 'print(hash("spam"))'
data = self.start_python('-R', '-c', code)
hashes.append(data)
self.assertNotEqual(hashes[0], hashes[1])
# Verify that sys.flags contains hash_randomization
code = 'import sys; print sys.flags'
data = self.start_python('-R', '-c', code)
self.assertTrue('hash_randomization=1' in data)
def test_del___main__(self):
# Issue #15001: PyRun_SimpleFileExFlags() did crash because it kept a
# borrowed reference to the dict of __main__ module and later modify
# the dict whereas the module was destroyed
filename = test.test_support.TESTFN
self.addCleanup(test.test_support.unlink, filename)
with open(filename, "w") as script:
print >>script, "import sys"
print >>script, "del sys.modules['__main__']"
assert_python_ok(filename)
def test_unknown_options(self):
rc, out, err = assert_python_failure('-E', '-z')
self.assertIn(b'Unknown option: -z', err)
self.assertEqual(err.splitlines().count(b'Unknown option: -z'), 1)
self.assertEqual(b'', out)
# Add "without='-E'" to prevent _assert_python to append -E
# to env_vars and change the output of stderr
rc, out, err = assert_python_failure('-z', without='-E')
self.assertIn(b'Unknown option: -z', err)
self.assertEqual(err.splitlines().count(b'Unknown option: -z'), 1)
self.assertEqual(b'', out)
rc, out, err = assert_python_failure('-a', '-z', without='-E')
self.assertIn(b'Unknown option: -a', err)
# only the first unknown option is reported
self.assertNotIn(b'Unknown option: -z', err)
self.assertEqual(err.splitlines().count(b'Unknown option: -a'), 1)
self.assertEqual(b'', out)
def test_main():
test.test_support.run_unittest(CmdLineTest)
test.test_support.reap_children()
if __name__ == "__main__":
test_main()