import timeit import unittest import sys import io from textwrap import dedent from test.support import captured_stdout from test.support import captured_stderr # timeit's default number of iterations. DEFAULT_NUMBER = 1000000 # timeit's default number of repetitions. DEFAULT_REPEAT = 5 # XXX: some tests are commented out that would improve the coverage but take a # long time to run because they test the default number of loops, which is # large. The tests could be enabled if there was a way to override the default # number of loops during testing, but this would require changing the signature # of some functions that use the default as a default argument. class FakeTimer: BASE_TIME = 42.0 def __init__(self, seconds_per_increment=1.0): self.count = 0 self.setup_calls = 0 self.seconds_per_increment=seconds_per_increment timeit._fake_timer = self def __call__(self): return self.BASE_TIME + self.count * self.seconds_per_increment def inc(self): self.count += 1 def setup(self): self.setup_calls += 1 def wrap_timer(self, timer): """Records 'timer' and returns self as callable timer.""" self.saved_timer = timer return self class TestTimeit(unittest.TestCase): def tearDown(self): try: del timeit._fake_timer except AttributeError: pass def test_reindent_empty(self): self.assertEqual(timeit.reindent("", 0), "") self.assertEqual(timeit.reindent("", 4), "") def test_reindent_single(self): self.assertEqual(timeit.reindent("pass", 0), "pass") self.assertEqual(timeit.reindent("pass", 4), "pass") def test_reindent_multi_empty(self): self.assertEqual(timeit.reindent("\n\n", 0), "\n\n") self.assertEqual(timeit.reindent("\n\n", 4), "\n \n ") def test_reindent_multi(self): self.assertEqual(timeit.reindent( "print()\npass\nbreak", 0), "print()\npass\nbreak") self.assertEqual(timeit.reindent( "print()\npass\nbreak", 4), "print()\n pass\n break") def test_timer_invalid_stmt(self): self.assertRaises(ValueError, timeit.Timer, stmt=None) self.assertRaises(SyntaxError, timeit.Timer, stmt='return') self.assertRaises(SyntaxError, timeit.Timer, stmt='yield') self.assertRaises(SyntaxError, timeit.Timer, stmt='yield from ()') self.assertRaises(SyntaxError, timeit.Timer, stmt='break') self.assertRaises(SyntaxError, timeit.Timer, stmt='continue') self.assertRaises(SyntaxError, timeit.Timer, stmt='from timeit import *') self.assertRaises(SyntaxError, timeit.Timer, stmt=' pass') self.assertRaises(SyntaxError, timeit.Timer, setup='while False:\n pass', stmt=' break') def test_timer_invalid_setup(self): self.assertRaises(ValueError, timeit.Timer, setup=None) self.assertRaises(SyntaxError, timeit.Timer, setup='return') self.assertRaises(SyntaxError, timeit.Timer, setup='yield') self.assertRaises(SyntaxError, timeit.Timer, setup='yield from ()') self.assertRaises(SyntaxError, timeit.Timer, setup='break') self.assertRaises(SyntaxError, timeit.Timer, setup='continue') self.assertRaises(SyntaxError, timeit.Timer, setup='from timeit import *') self.assertRaises(SyntaxError, timeit.Timer, setup=' pass') def test_timer_empty_stmt(self): timeit.Timer(stmt='') timeit.Timer(stmt=' \n\t\f') timeit.Timer(stmt='# comment') fake_setup = "import timeit\ntimeit._fake_timer.setup()" fake_stmt = "import timeit\ntimeit._fake_timer.inc()" def fake_callable_setup(self): self.fake_timer.setup() def fake_callable_stmt(self): self.fake_timer.inc() def timeit(self, stmt, setup, number=None, globals=None): self.fake_timer = FakeTimer() t = timeit.Timer(stmt=stmt, setup=setup, timer=self.fake_timer, globals=globals) kwargs = {} if number is None: number = DEFAULT_NUMBER else: kwargs['number'] = number delta_time = t.timeit(**kwargs) self.assertEqual(self.fake_timer.setup_calls, 1) self.assertEqual(self.fake_timer.count, number) self.assertEqual(delta_time, number) # Takes too long to run in debug build. #def test_timeit_default_iters(self): # self.timeit(self.fake_stmt, self.fake_setup) def test_timeit_zero_iters(self): self.timeit(self.fake_stmt, self.fake_setup, number=0) def test_timeit_few_iters(self): self.timeit(self.fake_stmt, self.fake_setup, number=3) def test_timeit_callable_stmt(self): self.timeit(self.fake_callable_stmt, self.fake_setup, number=3) def test_timeit_callable_setup(self): self.timeit(self.fake_stmt, self.fake_callable_setup, number=3) def test_timeit_callable_stmt_and_setup(self): self.timeit(self.fake_callable_stmt, self.fake_callable_setup, number=3) # Takes too long to run in debug build. #def test_timeit_function(self): # delta_time = timeit.timeit(self.fake_stmt, self.fake_setup, # timer=FakeTimer()) # self.assertEqual(delta_time, DEFAULT_NUMBER) def test_timeit_function_zero_iters(self): delta_time = timeit.timeit(self.fake_stmt, self.fake_setup, number=0, timer=FakeTimer()) self.assertEqual(delta_time, 0) def test_timeit_globals_args(self): global _global_timer _global_timer = FakeTimer() t = timeit.Timer(stmt='_global_timer.inc()', timer=_global_timer) self.assertRaises(NameError, t.timeit, number=3) timeit.timeit(stmt='_global_timer.inc()', timer=_global_timer, globals=globals(), number=3) local_timer = FakeTimer() timeit.timeit(stmt='local_timer.inc()', timer=local_timer, globals=locals(), number=3) def repeat(self, stmt, setup, repeat=None, number=None): self.fake_timer = FakeTimer() t = timeit.Timer(stmt=stmt, setup=setup, timer=self.fake_timer) kwargs = {} if repeat is None: repeat = DEFAULT_REPEAT else: kwargs['repeat'] = repeat if number is None: number = DEFAULT_NUMBER else: kwargs['number'] = number delta_times = t.repeat(**kwargs) self.assertEqual(self.fake_timer.setup_calls, repeat) self.assertEqual(self.fake_timer.count, repeat * number) self.assertEqual(delta_times, repeat * [float(number)]) # Takes too long to run in debug build. #def test_repeat_default(self): # self.repeat(self.fake_stmt, self.fake_setup) def test_repeat_zero_reps(self): self.repeat(self.fake_stmt, self.fake_setup, repeat=0) def test_repeat_zero_iters(self): self.repeat(self.fake_stmt, self.fake_setup, number=0) def test_repeat_few_reps_and_iters(self): self.repeat(self.fake_stmt, self.fake_setup, repeat=3, number=5) def test_repeat_callable_stmt(self): self.repeat(self.fake_callable_stmt, self.fake_setup, repeat=3, number=5) def test_repeat_callable_setup(self): self.repeat(self.fake_stmt, self.fake_callable_setup, repeat=3, number=5) def test_repeat_callable_stmt_and_setup(self): self.repeat(self.fake_callable_stmt, self.fake_callable_setup, repeat=3, number=5) # Takes too long to run in debug build. #def test_repeat_function(self): # delta_times = timeit.repeat(self.fake_stmt, self.fake_setup, # timer=FakeTimer()) # self.assertEqual(delta_times, DEFAULT_REPEAT * [float(DEFAULT_NUMBER)]) def test_repeat_function_zero_reps(self): delta_times = timeit.repeat(self.fake_stmt, self.fake_setup, repeat=0, timer=FakeTimer()) self.assertEqual(delta_times, []) def test_repeat_function_zero_iters(self): delta_times = timeit.repeat(self.fake_stmt, self.fake_setup, number=0, timer=FakeTimer()) self.assertEqual(delta_times, DEFAULT_REPEAT * [0.0]) def assert_exc_string(self, exc_string, expected_exc_name): exc_lines = exc_string.splitlines() self.assertGreater(len(exc_lines), 2) self.assertTrue(exc_lines[0].startswith('Traceback')) self.assertTrue(exc_lines[-1].startswith(expected_exc_name)) def test_print_exc(self): s = io.StringIO() t = timeit.Timer("1/0") try: t.timeit() except: t.print_exc(s) self.assert_exc_string(s.getvalue(), 'ZeroDivisionError') MAIN_DEFAULT_OUTPUT = "1 loop, best of 5: 1 sec per loop\n" def run_main(self, seconds_per_increment=1.0, switches=None, timer=None): if timer is None: timer = FakeTimer(seconds_per_increment=seconds_per_increment) if switches is None: args = [] else: args = switches[:] args.append(self.fake_stmt) # timeit.main() modifies sys.path, so save and restore it. orig_sys_path = sys.path[:] with captured_stdout() as s: timeit.main(args=args, _wrap_timer=timer.wrap_timer) sys.path[:] = orig_sys_path[:] return s.getvalue() def test_main_bad_switch(self): s = self.run_main(switches=['--bad-switch']) self.assertEqual(s, dedent("""\ option --bad-switch not recognized use -h/--help for command line help """)) def test_main_seconds(self): s = self.run_main(seconds_per_increment=5.5) self.assertEqual(s, "1 loop, best of 5: 5.5 sec per loop\n") def test_main_milliseconds(self): s = self.run_main(seconds_per_increment=0.0055) self.assertEqual(s, "50 loops, best of 5: 5.5 msec per loop\n") def test_main_microseconds(self): s = self.run_main(seconds_per_increment=0.0000025, switches=['-n100']) self.assertEqual(s, "100 loops, best of 5: 2.5 usec per loop\n") def test_main_fixed_iters(self): s = self.run_main(seconds_per_increment=2.0, switches=['-n35']) self.assertEqual(s, "35 loops, best of 5: 2 sec per loop\n") def test_main_setup(self): s = self.run_main(seconds_per_increment=2.0, switches=['-n35', '-s', 'print("CustomSetup")']) self.assertEqual(s, "CustomSetup\n" * DEFAULT_REPEAT + "35 loops, best of 5: 2 sec per loop\n") def test_main_multiple_setups(self): s = self.run_main(seconds_per_increment=2.0, switches=['-n35', '-s', 'a = "CustomSetup"', '-s', 'print(a)']) self.assertEqual(s, "CustomSetup\n" * DEFAULT_REPEAT + "35 loops, best of 5: 2 sec per loop\n") def test_main_fixed_reps(self): s = self.run_main(seconds_per_increment=60.0, switches=['-r9']) self.assertEqual(s, "1 loop, best of 9: 60 sec per loop\n") def test_main_negative_reps(self): s = self.run_main(seconds_per_increment=60.0, switches=['-r-5']) self.assertEqual(s, "1 loop, best of 1: 60 sec per loop\n") @unittest.skipIf(sys.flags.optimize >= 2, "need __doc__") def test_main_help(self): s = self.run_main(switches=['-h']) # Note: It's not clear that the trailing space was intended as part of # the help text, but since it's there, check for it. self.assertEqual(s, timeit.__doc__ + ' ') def test_main_verbose(self): s = self.run_main(switches=['-v']) self.assertEqual(s, dedent("""\ 1 loop -> 1 secs raw times: 1 sec, 1 sec, 1 sec, 1 sec, 1 sec 1 loop, best of 5: 1 sec per loop """)) def test_main_very_verbose(self): s = self.run_main(seconds_per_increment=0.000_030, switches=['-vv']) self.assertEqual(s, dedent("""\ 1 loop -> 3e-05 secs 2 loops -> 6e-05 secs 5 loops -> 0.00015 secs 10 loops -> 0.0003 secs 20 loops -> 0.0006 secs 50 loops -> 0.0015 secs 100 loops -> 0.003 secs 200 loops -> 0.006 secs 500 loops -> 0.015 secs 1000 loops -> 0.03 secs 2000 loops -> 0.06 secs 5000 loops -> 0.15 secs 10000 loops -> 0.3 secs raw times: 300 msec, 300 msec, 300 msec, 300 msec, 300 msec 10000 loops, best of 5: 30 usec per loop """)) def test_main_with_time_unit(self): unit_sec = self.run_main(seconds_per_increment=0.003, switches=['-u', 'sec']) self.assertEqual(unit_sec, "100 loops, best of 5: 0.003 sec per loop\n") unit_msec = self.run_main(seconds_per_increment=0.003, switches=['-u', 'msec']) self.assertEqual(unit_msec, "100 loops, best of 5: 3 msec per loop\n") unit_usec = self.run_main(seconds_per_increment=0.003, switches=['-u', 'usec']) self.assertEqual(unit_usec, "100 loops, best of 5: 3e+03 usec per loop\n") # Test invalid unit input with captured_stderr() as error_stringio: invalid = self.run_main(seconds_per_increment=0.003, switches=['-u', 'parsec']) self.assertEqual(error_stringio.getvalue(), "Unrecognized unit. Please select nsec, usec, msec, or sec.\n") def test_main_exception(self): with captured_stderr() as error_stringio: s = self.run_main(switches=['1/0']) self.assert_exc_string(error_stringio.getvalue(), 'ZeroDivisionError') def test_main_exception_fixed_reps(self): with captured_stderr() as error_stringio: s = self.run_main(switches=['-n1', '1/0']) self.assert_exc_string(error_stringio.getvalue(), 'ZeroDivisionError') def autorange(self, seconds_per_increment=1/1024, callback=None): timer = FakeTimer(seconds_per_increment=seconds_per_increment) t = timeit.Timer(stmt=self.fake_stmt, setup=self.fake_setup, timer=timer) return t.autorange(callback) def test_autorange(self): num_loops, time_taken = self.autorange() self.assertEqual(num_loops, 500) self.assertEqual(time_taken, 500/1024) def test_autorange_second(self): num_loops, time_taken = self.autorange(seconds_per_increment=1.0) self.assertEqual(num_loops, 1) self.assertEqual(time_taken, 1.0) def test_autorange_with_callback(self): def callback(a, b): print("{} {:.3f}".format(a, b)) with captured_stdout() as s: num_loops, time_taken = self.autorange(callback=callback) self.assertEqual(num_loops, 500) self.assertEqual(time_taken, 500/1024) expected = ('1 0.001\n' '2 0.002\n' '5 0.005\n' '10 0.010\n' '20 0.020\n' '50 0.049\n' '100 0.098\n' '200 0.195\n' '500 0.488\n') self.assertEqual(s.getvalue(), expected) if __name__ == '__main__': unittest.main() SIMPAN PERUBAHAN