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223 lines
9.0 KiB
Python
223 lines
9.0 KiB
Python
"""Test suite for the profile module."""
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import sys
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import pstats
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import unittest
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import os
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from difflib import unified_diff
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from io import StringIO
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from test.support.os_helper import TESTFN, unlink, temp_dir, change_cwd
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from contextlib import contextmanager, redirect_stdout
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import profile
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from test.profilee import testfunc, timer
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from test.support.script_helper import assert_python_failure, assert_python_ok
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class ProfileTest(unittest.TestCase):
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profilerclass = profile.Profile
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profilermodule = profile
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methodnames = ['print_stats', 'print_callers', 'print_callees']
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expected_max_output = ':0(max)'
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def tearDown(self):
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unlink(TESTFN)
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def get_expected_output(self):
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return _ProfileOutput
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@classmethod
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def do_profiling(cls):
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results = []
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prof = cls.profilerclass(timer, 0.001)
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start_timer = timer()
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prof.runctx("testfunc()", globals(), locals())
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results.append(timer() - start_timer)
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for methodname in cls.methodnames:
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s = StringIO()
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stats = pstats.Stats(prof, stream=s)
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stats.strip_dirs().sort_stats("stdname")
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getattr(stats, methodname)()
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output = s.getvalue().splitlines()
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mod_name = testfunc.__module__.rsplit('.', 1)[1]
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# Only compare against stats originating from the test file.
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# Prevents outside code (e.g., the io module) from causing
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# unexpected output.
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output = [line.rstrip() for line in output if mod_name in line]
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results.append('\n'.join(output))
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return results
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def test_cprofile(self):
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results = self.do_profiling()
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expected = self.get_expected_output()
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self.assertEqual(results[0], 1000)
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fail = []
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for i, method in enumerate(self.methodnames):
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a = expected[method]
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b = results[i+1]
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if a != b:
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fail.append(f"\nStats.{method} output for "
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f"{self.profilerclass.__name__} "
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"does not fit expectation:")
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fail.extend(unified_diff(a.split('\n'), b.split('\n'),
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lineterm=""))
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if fail:
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self.fail("\n".join(fail))
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def test_calling_conventions(self):
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# Issue #5330: profile and cProfile wouldn't report C functions called
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# with keyword arguments. We test all calling conventions.
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stmts = [
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"max([0])",
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"max([0], key=int)",
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"max([0], **dict(key=int))",
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"max(*([0],))",
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"max(*([0],), key=int)",
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"max(*([0],), **dict(key=int))",
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]
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for stmt in stmts:
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s = StringIO()
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prof = self.profilerclass(timer, 0.001)
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prof.runctx(stmt, globals(), locals())
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stats = pstats.Stats(prof, stream=s)
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stats.print_stats()
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res = s.getvalue()
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self.assertIn(self.expected_max_output, res,
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"Profiling {0!r} didn't report max:\n{1}".format(stmt, res))
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def test_run(self):
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with silent():
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self.profilermodule.run("int('1')")
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self.profilermodule.run("int('1')", filename=TESTFN)
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self.assertTrue(os.path.exists(TESTFN))
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def test_run_with_sort_by_values(self):
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with redirect_stdout(StringIO()) as f:
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self.profilermodule.run("int('1')", sort=('tottime', 'stdname'))
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self.assertIn("Ordered by: internal time, standard name", f.getvalue())
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def test_runctx(self):
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with silent():
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self.profilermodule.runctx("testfunc()", globals(), locals())
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self.profilermodule.runctx("testfunc()", globals(), locals(),
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filename=TESTFN)
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self.assertTrue(os.path.exists(TESTFN))
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def test_run_profile_as_module(self):
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# Test that -m switch needs an argument
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assert_python_failure('-m', self.profilermodule.__name__, '-m')
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# Test failure for not-existent module
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assert_python_failure('-m', self.profilermodule.__name__,
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'-m', 'random_module_xyz')
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# Test successful run
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assert_python_ok('-m', self.profilermodule.__name__,
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'-m', 'timeit', '-n', '1')
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def test_output_file_when_changing_directory(self):
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with temp_dir() as tmpdir, change_cwd(tmpdir):
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os.mkdir('dest')
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with open('demo.py', 'w', encoding="utf-8") as f:
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f.write('import os; os.chdir("dest")')
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assert_python_ok(
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'-m', self.profilermodule.__name__,
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'-o', 'out.pstats',
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'demo.py',
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)
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self.assertTrue(os.path.exists('out.pstats'))
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def regenerate_expected_output(filename, cls):
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filename = filename.rstrip('co')
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print('Regenerating %s...' % filename)
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results = cls.do_profiling()
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newfile = []
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with open(filename, 'r') as f:
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for line in f:
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newfile.append(line)
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if line.startswith('#--cut'):
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break
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with open(filename, 'w') as f:
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f.writelines(newfile)
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f.write("_ProfileOutput = {}\n")
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for i, method in enumerate(cls.methodnames):
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f.write('_ProfileOutput[%r] = """\\\n%s"""\n' % (
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method, results[i+1]))
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f.write('\nif __name__ == "__main__":\n main()\n')
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@contextmanager
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def silent():
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stdout = sys.stdout
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try:
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sys.stdout = StringIO()
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yield
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finally:
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sys.stdout = stdout
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def main():
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if '-r' not in sys.argv:
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unittest.main()
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else:
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regenerate_expected_output(__file__, ProfileTest)
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# Don't remove this comment. Everything below it is auto-generated.
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#--cut--------------------------------------------------------------------------
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_ProfileOutput = {}
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_ProfileOutput['print_stats'] = """\
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28 27.972 0.999 27.972 0.999 profilee.py:110(__getattr__)
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1 269.996 269.996 999.769 999.769 profilee.py:25(testfunc)
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23/3 149.937 6.519 169.917 56.639 profilee.py:35(factorial)
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20 19.980 0.999 19.980 0.999 profilee.py:48(mul)
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2 39.986 19.993 599.830 299.915 profilee.py:55(helper)
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4 115.984 28.996 119.964 29.991 profilee.py:73(helper1)
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2 -0.006 -0.003 139.946 69.973 profilee.py:84(helper2_indirect)
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8 311.976 38.997 399.912 49.989 profilee.py:88(helper2)
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8 63.976 7.997 79.960 9.995 profilee.py:98(subhelper)"""
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_ProfileOutput['print_callers'] = """\
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:0(append) <- profilee.py:73(helper1)(4) 119.964
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:0(exception) <- profilee.py:73(helper1)(4) 119.964
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:0(hasattr) <- profilee.py:73(helper1)(4) 119.964
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profilee.py:88(helper2)(8) 399.912
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profilee.py:110(__getattr__) <- :0(hasattr)(12) 11.964
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profilee.py:98(subhelper)(16) 79.960
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profilee.py:25(testfunc) <- <string>:1(<module>)(1) 999.767
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profilee.py:35(factorial) <- profilee.py:25(testfunc)(1) 999.769
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profilee.py:35(factorial)(20) 169.917
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profilee.py:84(helper2_indirect)(2) 139.946
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profilee.py:48(mul) <- profilee.py:35(factorial)(20) 169.917
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profilee.py:55(helper) <- profilee.py:25(testfunc)(2) 999.769
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profilee.py:73(helper1) <- profilee.py:55(helper)(4) 599.830
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profilee.py:84(helper2_indirect) <- profilee.py:55(helper)(2) 599.830
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profilee.py:88(helper2) <- profilee.py:55(helper)(6) 599.830
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profilee.py:84(helper2_indirect)(2) 139.946
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profilee.py:98(subhelper) <- profilee.py:88(helper2)(8) 399.912"""
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_ProfileOutput['print_callees'] = """\
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:0(hasattr) -> profilee.py:110(__getattr__)(12) 27.972
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<string>:1(<module>) -> profilee.py:25(testfunc)(1) 999.769
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profilee.py:110(__getattr__) ->
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profilee.py:25(testfunc) -> profilee.py:35(factorial)(1) 169.917
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profilee.py:55(helper)(2) 599.830
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profilee.py:35(factorial) -> profilee.py:35(factorial)(20) 169.917
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profilee.py:48(mul)(20) 19.980
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profilee.py:48(mul) ->
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profilee.py:55(helper) -> profilee.py:73(helper1)(4) 119.964
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profilee.py:84(helper2_indirect)(2) 139.946
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profilee.py:88(helper2)(6) 399.912
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profilee.py:73(helper1) -> :0(append)(4) -0.004
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profilee.py:84(helper2_indirect) -> profilee.py:35(factorial)(2) 169.917
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profilee.py:88(helper2)(2) 399.912
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profilee.py:88(helper2) -> :0(hasattr)(8) 11.964
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profilee.py:98(subhelper)(8) 79.960
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profilee.py:98(subhelper) -> profilee.py:110(__getattr__)(16) 27.972"""
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if __name__ == "__main__":
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main()
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