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bedce3538c
Instead of explicitly enumerate test classes for run_unittest()
use the unittest ability to discover tests. This also makes these
tests discoverable and runnable with unittest.
load_tests() can be used for dynamic generating tests and adding
doctests. setUpModule(), tearDownModule() and addModuleCleanup()
can be used for running code before and after all module tests.
(cherry picked from commit 40348acc18)
217 lines
8.7 KiB
Python
217 lines
8.7 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
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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_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(exc_info) <- 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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