/usr/lib/python3.7/test/test_trace.py is in libpython3.7-testsuite 3.7.0~b3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 | import os
import sys
from test.support import TESTFN, rmtree, unlink, captured_stdout
from test.support.script_helper import assert_python_ok, assert_python_failure
import unittest
import trace
from trace import Trace
from test.tracedmodules import testmod
#------------------------------- Utilities -----------------------------------#
def fix_ext_py(filename):
"""Given a .pyc filename converts it to the appropriate .py"""
if filename.endswith('.pyc'):
filename = filename[:-1]
return filename
def my_file_and_modname():
"""The .py file and module name of this file (__file__)"""
modname = os.path.splitext(os.path.basename(__file__))[0]
return fix_ext_py(__file__), modname
def get_firstlineno(func):
return func.__code__.co_firstlineno
#-------------------- Target functions for tracing ---------------------------#
#
# The relative line numbers of lines in these functions matter for verifying
# tracing. Please modify the appropriate tests if you change one of the
# functions. Absolute line numbers don't matter.
#
def traced_func_linear(x, y):
a = x
b = y
c = a + b
return c
def traced_func_loop(x, y):
c = x
for i in range(5):
c += y
return c
def traced_func_importing(x, y):
return x + y + testmod.func(1)
def traced_func_simple_caller(x):
c = traced_func_linear(x, x)
return c + x
def traced_func_importing_caller(x):
k = traced_func_simple_caller(x)
k += traced_func_importing(k, x)
return k
def traced_func_generator(num):
c = 5 # executed once
for i in range(num):
yield i + c
def traced_func_calling_generator():
k = 0
for i in traced_func_generator(10):
k += i
def traced_doubler(num):
return num * 2
def traced_caller_list_comprehension():
k = 10
mylist = [traced_doubler(i) for i in range(k)]
return mylist
class TracedClass(object):
def __init__(self, x):
self.a = x
def inst_method_linear(self, y):
return self.a + y
def inst_method_calling(self, x):
c = self.inst_method_linear(x)
return c + traced_func_linear(x, c)
@classmethod
def class_method_linear(cls, y):
return y * 2
@staticmethod
def static_method_linear(y):
return y * 2
#------------------------------ Test cases -----------------------------------#
class TestLineCounts(unittest.TestCase):
"""White-box testing of line-counting, via runfunc"""
def setUp(self):
self.addCleanup(sys.settrace, sys.gettrace())
self.tracer = Trace(count=1, trace=0, countfuncs=0, countcallers=0)
self.my_py_filename = fix_ext_py(__file__)
def test_traced_func_linear(self):
result = self.tracer.runfunc(traced_func_linear, 2, 5)
self.assertEqual(result, 7)
# all lines are executed once
expected = {}
firstlineno = get_firstlineno(traced_func_linear)
for i in range(1, 5):
expected[(self.my_py_filename, firstlineno + i)] = 1
self.assertEqual(self.tracer.results().counts, expected)
def test_traced_func_loop(self):
self.tracer.runfunc(traced_func_loop, 2, 3)
firstlineno = get_firstlineno(traced_func_loop)
expected = {
(self.my_py_filename, firstlineno + 1): 1,
(self.my_py_filename, firstlineno + 2): 6,
(self.my_py_filename, firstlineno + 3): 5,
(self.my_py_filename, firstlineno + 4): 1,
}
self.assertEqual(self.tracer.results().counts, expected)
def test_traced_func_importing(self):
self.tracer.runfunc(traced_func_importing, 2, 5)
firstlineno = get_firstlineno(traced_func_importing)
expected = {
(self.my_py_filename, firstlineno + 1): 1,
(fix_ext_py(testmod.__file__), 2): 1,
(fix_ext_py(testmod.__file__), 3): 1,
}
self.assertEqual(self.tracer.results().counts, expected)
def test_trace_func_generator(self):
self.tracer.runfunc(traced_func_calling_generator)
firstlineno_calling = get_firstlineno(traced_func_calling_generator)
firstlineno_gen = get_firstlineno(traced_func_generator)
expected = {
(self.my_py_filename, firstlineno_calling + 1): 1,
(self.my_py_filename, firstlineno_calling + 2): 11,
(self.my_py_filename, firstlineno_calling + 3): 10,
(self.my_py_filename, firstlineno_gen + 1): 1,
(self.my_py_filename, firstlineno_gen + 2): 11,
(self.my_py_filename, firstlineno_gen + 3): 10,
}
self.assertEqual(self.tracer.results().counts, expected)
def test_trace_list_comprehension(self):
self.tracer.runfunc(traced_caller_list_comprehension)
firstlineno_calling = get_firstlineno(traced_caller_list_comprehension)
firstlineno_called = get_firstlineno(traced_doubler)
expected = {
(self.my_py_filename, firstlineno_calling + 1): 1,
# List compehentions work differently in 3.x, so the count
# below changed compared to 2.x.
(self.my_py_filename, firstlineno_calling + 2): 12,
(self.my_py_filename, firstlineno_calling + 3): 1,
(self.my_py_filename, firstlineno_called + 1): 10,
}
self.assertEqual(self.tracer.results().counts, expected)
def test_linear_methods(self):
# XXX todo: later add 'static_method_linear' and 'class_method_linear'
# here, once issue1764286 is resolved
#
for methname in ['inst_method_linear',]:
tracer = Trace(count=1, trace=0, countfuncs=0, countcallers=0)
traced_obj = TracedClass(25)
method = getattr(traced_obj, methname)
tracer.runfunc(method, 20)
firstlineno = get_firstlineno(method)
expected = {
(self.my_py_filename, firstlineno + 1): 1,
}
self.assertEqual(tracer.results().counts, expected)
class TestRunExecCounts(unittest.TestCase):
"""A simple sanity test of line-counting, via runctx (exec)"""
def setUp(self):
self.my_py_filename = fix_ext_py(__file__)
self.addCleanup(sys.settrace, sys.gettrace())
def test_exec_counts(self):
self.tracer = Trace(count=1, trace=0, countfuncs=0, countcallers=0)
code = r'''traced_func_loop(2, 5)'''
code = compile(code, __file__, 'exec')
self.tracer.runctx(code, globals(), vars())
firstlineno = get_firstlineno(traced_func_loop)
expected = {
(self.my_py_filename, firstlineno + 1): 1,
(self.my_py_filename, firstlineno + 2): 6,
(self.my_py_filename, firstlineno + 3): 5,
(self.my_py_filename, firstlineno + 4): 1,
}
# When used through 'run', some other spurious counts are produced, like
# the settrace of threading, which we ignore, just making sure that the
# counts fo traced_func_loop were right.
#
for k in expected.keys():
self.assertEqual(self.tracer.results().counts[k], expected[k])
class TestFuncs(unittest.TestCase):
"""White-box testing of funcs tracing"""
def setUp(self):
self.addCleanup(sys.settrace, sys.gettrace())
self.tracer = Trace(count=0, trace=0, countfuncs=1)
self.filemod = my_file_and_modname()
self._saved_tracefunc = sys.gettrace()
def tearDown(self):
if self._saved_tracefunc is not None:
sys.settrace(self._saved_tracefunc)
def test_simple_caller(self):
self.tracer.runfunc(traced_func_simple_caller, 1)
expected = {
self.filemod + ('traced_func_simple_caller',): 1,
self.filemod + ('traced_func_linear',): 1,
}
self.assertEqual(self.tracer.results().calledfuncs, expected)
def test_loop_caller_importing(self):
self.tracer.runfunc(traced_func_importing_caller, 1)
expected = {
self.filemod + ('traced_func_simple_caller',): 1,
self.filemod + ('traced_func_linear',): 1,
self.filemod + ('traced_func_importing_caller',): 1,
self.filemod + ('traced_func_importing',): 1,
(fix_ext_py(testmod.__file__), 'testmod', 'func'): 1,
}
self.assertEqual(self.tracer.results().calledfuncs, expected)
@unittest.skipIf(hasattr(sys, 'gettrace') and sys.gettrace(),
'pre-existing trace function throws off measurements')
def test_inst_method_calling(self):
obj = TracedClass(20)
self.tracer.runfunc(obj.inst_method_calling, 1)
expected = {
self.filemod + ('TracedClass.inst_method_calling',): 1,
self.filemod + ('TracedClass.inst_method_linear',): 1,
self.filemod + ('traced_func_linear',): 1,
}
self.assertEqual(self.tracer.results().calledfuncs, expected)
class TestCallers(unittest.TestCase):
"""White-box testing of callers tracing"""
def setUp(self):
self.addCleanup(sys.settrace, sys.gettrace())
self.tracer = Trace(count=0, trace=0, countcallers=1)
self.filemod = my_file_and_modname()
@unittest.skipIf(hasattr(sys, 'gettrace') and sys.gettrace(),
'pre-existing trace function throws off measurements')
def test_loop_caller_importing(self):
self.tracer.runfunc(traced_func_importing_caller, 1)
expected = {
((os.path.splitext(trace.__file__)[0] + '.py', 'trace', 'Trace.runfunc'),
(self.filemod + ('traced_func_importing_caller',))): 1,
((self.filemod + ('traced_func_simple_caller',)),
(self.filemod + ('traced_func_linear',))): 1,
((self.filemod + ('traced_func_importing_caller',)),
(self.filemod + ('traced_func_simple_caller',))): 1,
((self.filemod + ('traced_func_importing_caller',)),
(self.filemod + ('traced_func_importing',))): 1,
((self.filemod + ('traced_func_importing',)),
(fix_ext_py(testmod.__file__), 'testmod', 'func')): 1,
}
self.assertEqual(self.tracer.results().callers, expected)
# Created separately for issue #3821
class TestCoverage(unittest.TestCase):
def setUp(self):
self.addCleanup(sys.settrace, sys.gettrace())
def tearDown(self):
rmtree(TESTFN)
unlink(TESTFN)
def _coverage(self, tracer,
cmd='import test.support, test.test_pprint;'
'test.support.run_unittest(test.test_pprint.QueryTestCase)'):
tracer.run(cmd)
r = tracer.results()
r.write_results(show_missing=True, summary=True, coverdir=TESTFN)
def test_coverage(self):
tracer = trace.Trace(trace=0, count=1)
with captured_stdout() as stdout:
self._coverage(tracer)
stdout = stdout.getvalue()
self.assertIn("pprint.py", stdout)
self.assertIn("case.py", stdout) # from unittest
files = os.listdir(TESTFN)
self.assertIn("pprint.cover", files)
self.assertIn("unittest.case.cover", files)
def test_coverage_ignore(self):
# Ignore all files, nothing should be traced nor printed
libpath = os.path.normpath(os.path.dirname(os.__file__))
# sys.prefix does not work when running from a checkout
tracer = trace.Trace(ignoredirs=[sys.base_prefix, sys.base_exec_prefix,
libpath], trace=0, count=1)
with captured_stdout() as stdout:
self._coverage(tracer)
if os.path.exists(TESTFN):
files = os.listdir(TESTFN)
self.assertEqual(files, ['_importlib.cover']) # Ignore __import__
def test_issue9936(self):
tracer = trace.Trace(trace=0, count=1)
modname = 'test.tracedmodules.testmod'
# Ensure that the module is executed in import
if modname in sys.modules:
del sys.modules[modname]
cmd = ("import test.tracedmodules.testmod as t;"
"t.func(0); t.func2();")
with captured_stdout() as stdout:
self._coverage(tracer, cmd)
stdout.seek(0)
stdout.readline()
coverage = {}
for line in stdout:
lines, cov, module = line.split()[:3]
coverage[module] = (int(lines), int(cov[:-1]))
# XXX This is needed to run regrtest.py as a script
modname = trace._fullmodname(sys.modules[modname].__file__)
self.assertIn(modname, coverage)
self.assertEqual(coverage[modname], (5, 100))
### Tests that don't mess with sys.settrace and can be traced
### themselves TODO: Skip tests that do mess with sys.settrace when
### regrtest is invoked with -T option.
class Test_Ignore(unittest.TestCase):
def test_ignored(self):
jn = os.path.join
ignore = trace._Ignore(['x', 'y.z'], [jn('foo', 'bar')])
self.assertTrue(ignore.names('x.py', 'x'))
self.assertFalse(ignore.names('xy.py', 'xy'))
self.assertFalse(ignore.names('y.py', 'y'))
self.assertTrue(ignore.names(jn('foo', 'bar', 'baz.py'), 'baz'))
self.assertFalse(ignore.names(jn('bar', 'z.py'), 'z'))
# Matched before.
self.assertTrue(ignore.names(jn('bar', 'baz.py'), 'baz'))
class TestCommandLine(unittest.TestCase):
def test_failures(self):
_errors = (
(b'filename is missing: required with the main options', '-l', '-T'),
(b'cannot specify both --listfuncs and (--trace or --count)', '-lc'),
(b'argument -R/--no-report: not allowed with argument -r/--report', '-rR'),
(b'must specify one of --trace, --count, --report, --listfuncs, or --trackcalls', '-g'),
(b'-r/--report requires -f/--file', '-r'),
(b'--summary can only be used with --count or --report', '-sT'),
(b'unrecognized arguments: -y', '-y'))
for message, *args in _errors:
*_, stderr = assert_python_failure('-m', 'trace', *args)
self.assertIn(message, stderr)
def test_listfuncs_flag_success(self):
with open(TESTFN, 'w') as fd:
self.addCleanup(unlink, TESTFN)
fd.write("a = 1\n")
status, stdout, stderr = assert_python_ok('-m', 'trace', '-l', TESTFN)
self.assertIn(b'functions called:', stdout)
def test_sys_argv_list(self):
with open(TESTFN, 'w') as fd:
self.addCleanup(unlink, TESTFN)
fd.write("import sys\n")
fd.write("print(type(sys.argv))\n")
status, direct_stdout, stderr = assert_python_ok(TESTFN)
status, trace_stdout, stderr = assert_python_ok('-m', 'trace', '-l', TESTFN)
self.assertIn(direct_stdout.strip(), trace_stdout)
if __name__ == '__main__':
unittest.main()
|