392 lines
14 KiB
Python
392 lines
14 KiB
Python
import os
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import sys
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from test.support import TESTFN, rmtree, unlink, captured_stdout
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from test.support.script_helper import assert_python_ok, assert_python_failure
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import unittest
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import trace
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from trace import Trace
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from test.tracedmodules import testmod
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#------------------------------- Utilities -----------------------------------#
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def fix_ext_py(filename):
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"""Given a .pyc filename converts it to the appropriate .py"""
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if filename.endswith('.pyc'):
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filename = filename[:-1]
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return filename
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def my_file_and_modname():
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"""The .py file and module name of this file (__file__)"""
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modname = os.path.splitext(os.path.basename(__file__))[0]
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return fix_ext_py(__file__), modname
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def get_firstlineno(func):
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return func.__code__.co_firstlineno
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#-------------------- Target functions for tracing ---------------------------#
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#
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# The relative line numbers of lines in these functions matter for verifying
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# tracing. Please modify the appropriate tests if you change one of the
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# functions. Absolute line numbers don't matter.
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#
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def traced_func_linear(x, y):
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a = x
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b = y
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c = a + b
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return c
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def traced_func_loop(x, y):
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c = x
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for i in range(5):
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c += y
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return c
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def traced_func_importing(x, y):
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return x + y + testmod.func(1)
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def traced_func_simple_caller(x):
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c = traced_func_linear(x, x)
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return c + x
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def traced_func_importing_caller(x):
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k = traced_func_simple_caller(x)
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k += traced_func_importing(k, x)
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return k
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def traced_func_generator(num):
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c = 5 # executed once
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for i in range(num):
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yield i + c
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def traced_func_calling_generator():
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k = 0
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for i in traced_func_generator(10):
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k += i
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def traced_doubler(num):
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return num * 2
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def traced_caller_list_comprehension():
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k = 10
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mylist = [traced_doubler(i) for i in range(k)]
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return mylist
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class TracedClass(object):
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def __init__(self, x):
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self.a = x
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def inst_method_linear(self, y):
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return self.a + y
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def inst_method_calling(self, x):
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c = self.inst_method_linear(x)
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return c + traced_func_linear(x, c)
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@classmethod
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def class_method_linear(cls, y):
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return y * 2
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@staticmethod
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def static_method_linear(y):
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return y * 2
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#------------------------------ Test cases -----------------------------------#
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class TestLineCounts(unittest.TestCase):
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"""White-box testing of line-counting, via runfunc"""
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def setUp(self):
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self.addCleanup(sys.settrace, sys.gettrace())
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self.tracer = Trace(count=1, trace=0, countfuncs=0, countcallers=0)
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self.my_py_filename = fix_ext_py(__file__)
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def test_traced_func_linear(self):
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result = self.tracer.runfunc(traced_func_linear, 2, 5)
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self.assertEqual(result, 7)
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# all lines are executed once
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expected = {}
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firstlineno = get_firstlineno(traced_func_linear)
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for i in range(1, 5):
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expected[(self.my_py_filename, firstlineno + i)] = 1
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self.assertEqual(self.tracer.results().counts, expected)
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def test_traced_func_loop(self):
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self.tracer.runfunc(traced_func_loop, 2, 3)
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firstlineno = get_firstlineno(traced_func_loop)
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expected = {
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(self.my_py_filename, firstlineno + 1): 1,
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(self.my_py_filename, firstlineno + 2): 6,
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(self.my_py_filename, firstlineno + 3): 5,
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(self.my_py_filename, firstlineno + 4): 1,
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}
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self.assertEqual(self.tracer.results().counts, expected)
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def test_traced_func_importing(self):
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self.tracer.runfunc(traced_func_importing, 2, 5)
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firstlineno = get_firstlineno(traced_func_importing)
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expected = {
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(self.my_py_filename, firstlineno + 1): 1,
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(fix_ext_py(testmod.__file__), 2): 1,
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(fix_ext_py(testmod.__file__), 3): 1,
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}
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self.assertEqual(self.tracer.results().counts, expected)
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def test_trace_func_generator(self):
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self.tracer.runfunc(traced_func_calling_generator)
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firstlineno_calling = get_firstlineno(traced_func_calling_generator)
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firstlineno_gen = get_firstlineno(traced_func_generator)
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expected = {
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(self.my_py_filename, firstlineno_calling + 1): 1,
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(self.my_py_filename, firstlineno_calling + 2): 11,
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(self.my_py_filename, firstlineno_calling + 3): 10,
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(self.my_py_filename, firstlineno_gen + 1): 1,
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(self.my_py_filename, firstlineno_gen + 2): 11,
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(self.my_py_filename, firstlineno_gen + 3): 10,
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}
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self.assertEqual(self.tracer.results().counts, expected)
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def test_trace_list_comprehension(self):
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self.tracer.runfunc(traced_caller_list_comprehension)
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firstlineno_calling = get_firstlineno(traced_caller_list_comprehension)
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firstlineno_called = get_firstlineno(traced_doubler)
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expected = {
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(self.my_py_filename, firstlineno_calling + 1): 1,
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# List compehentions work differently in 3.x, so the count
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# below changed compared to 2.x.
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(self.my_py_filename, firstlineno_calling + 2): 12,
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(self.my_py_filename, firstlineno_calling + 3): 1,
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(self.my_py_filename, firstlineno_called + 1): 10,
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}
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self.assertEqual(self.tracer.results().counts, expected)
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def test_linear_methods(self):
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# XXX todo: later add 'static_method_linear' and 'class_method_linear'
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# here, once issue1764286 is resolved
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#
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for methname in ['inst_method_linear',]:
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tracer = Trace(count=1, trace=0, countfuncs=0, countcallers=0)
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traced_obj = TracedClass(25)
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method = getattr(traced_obj, methname)
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tracer.runfunc(method, 20)
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firstlineno = get_firstlineno(method)
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expected = {
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(self.my_py_filename, firstlineno + 1): 1,
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}
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self.assertEqual(tracer.results().counts, expected)
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class TestRunExecCounts(unittest.TestCase):
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"""A simple sanity test of line-counting, via runctx (exec)"""
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def setUp(self):
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self.my_py_filename = fix_ext_py(__file__)
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self.addCleanup(sys.settrace, sys.gettrace())
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def test_exec_counts(self):
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self.tracer = Trace(count=1, trace=0, countfuncs=0, countcallers=0)
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code = r'''traced_func_loop(2, 5)'''
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code = compile(code, __file__, 'exec')
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self.tracer.runctx(code, globals(), vars())
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firstlineno = get_firstlineno(traced_func_loop)
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expected = {
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(self.my_py_filename, firstlineno + 1): 1,
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(self.my_py_filename, firstlineno + 2): 6,
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(self.my_py_filename, firstlineno + 3): 5,
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(self.my_py_filename, firstlineno + 4): 1,
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}
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# When used through 'run', some other spurious counts are produced, like
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# the settrace of threading, which we ignore, just making sure that the
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# counts fo traced_func_loop were right.
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#
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for k in expected.keys():
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self.assertEqual(self.tracer.results().counts[k], expected[k])
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class TestFuncs(unittest.TestCase):
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"""White-box testing of funcs tracing"""
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def setUp(self):
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self.addCleanup(sys.settrace, sys.gettrace())
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self.tracer = Trace(count=0, trace=0, countfuncs=1)
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self.filemod = my_file_and_modname()
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self._saved_tracefunc = sys.gettrace()
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def tearDown(self):
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if self._saved_tracefunc is not None:
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sys.settrace(self._saved_tracefunc)
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def test_simple_caller(self):
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self.tracer.runfunc(traced_func_simple_caller, 1)
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expected = {
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self.filemod + ('traced_func_simple_caller',): 1,
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self.filemod + ('traced_func_linear',): 1,
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}
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self.assertEqual(self.tracer.results().calledfuncs, expected)
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def test_loop_caller_importing(self):
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self.tracer.runfunc(traced_func_importing_caller, 1)
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expected = {
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self.filemod + ('traced_func_simple_caller',): 1,
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self.filemod + ('traced_func_linear',): 1,
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self.filemod + ('traced_func_importing_caller',): 1,
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self.filemod + ('traced_func_importing',): 1,
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(fix_ext_py(testmod.__file__), 'testmod', 'func'): 1,
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}
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self.assertEqual(self.tracer.results().calledfuncs, expected)
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@unittest.skipIf(hasattr(sys, 'gettrace') and sys.gettrace(),
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'pre-existing trace function throws off measurements')
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def test_inst_method_calling(self):
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obj = TracedClass(20)
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self.tracer.runfunc(obj.inst_method_calling, 1)
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expected = {
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self.filemod + ('TracedClass.inst_method_calling',): 1,
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self.filemod + ('TracedClass.inst_method_linear',): 1,
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self.filemod + ('traced_func_linear',): 1,
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}
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self.assertEqual(self.tracer.results().calledfuncs, expected)
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class TestCallers(unittest.TestCase):
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"""White-box testing of callers tracing"""
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def setUp(self):
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self.addCleanup(sys.settrace, sys.gettrace())
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self.tracer = Trace(count=0, trace=0, countcallers=1)
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self.filemod = my_file_and_modname()
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@unittest.skipIf(hasattr(sys, 'gettrace') and sys.gettrace(),
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'pre-existing trace function throws off measurements')
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def test_loop_caller_importing(self):
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self.tracer.runfunc(traced_func_importing_caller, 1)
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expected = {
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((os.path.splitext(trace.__file__)[0] + '.py', 'trace', 'Trace.runfunc'),
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(self.filemod + ('traced_func_importing_caller',))): 1,
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((self.filemod + ('traced_func_simple_caller',)),
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(self.filemod + ('traced_func_linear',))): 1,
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((self.filemod + ('traced_func_importing_caller',)),
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(self.filemod + ('traced_func_simple_caller',))): 1,
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((self.filemod + ('traced_func_importing_caller',)),
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(self.filemod + ('traced_func_importing',))): 1,
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((self.filemod + ('traced_func_importing',)),
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(fix_ext_py(testmod.__file__), 'testmod', 'func')): 1,
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}
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self.assertEqual(self.tracer.results().callers, expected)
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# Created separately for issue #3821
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class TestCoverage(unittest.TestCase):
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def setUp(self):
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self.addCleanup(sys.settrace, sys.gettrace())
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def tearDown(self):
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rmtree(TESTFN)
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unlink(TESTFN)
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def _coverage(self, tracer,
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cmd='import test.support, test.test_pprint;'
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'test.support.run_unittest(test.test_pprint.QueryTestCase)'):
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tracer.run(cmd)
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r = tracer.results()
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r.write_results(show_missing=True, summary=True, coverdir=TESTFN)
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def test_coverage(self):
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tracer = trace.Trace(trace=0, count=1)
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with captured_stdout() as stdout:
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self._coverage(tracer)
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stdout = stdout.getvalue()
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self.assertTrue("pprint.py" in stdout)
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self.assertTrue("case.py" in stdout) # from unittest
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files = os.listdir(TESTFN)
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self.assertTrue("pprint.cover" in files)
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self.assertTrue("unittest.case.cover" in files)
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def test_coverage_ignore(self):
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# Ignore all files, nothing should be traced nor printed
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libpath = os.path.normpath(os.path.dirname(os.__file__))
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# sys.prefix does not work when running from a checkout
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tracer = trace.Trace(ignoredirs=[sys.base_prefix, sys.base_exec_prefix,
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libpath], trace=0, count=1)
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with captured_stdout() as stdout:
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self._coverage(tracer)
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if os.path.exists(TESTFN):
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files = os.listdir(TESTFN)
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self.assertEqual(files, ['_importlib.cover']) # Ignore __import__
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def test_issue9936(self):
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tracer = trace.Trace(trace=0, count=1)
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modname = 'test.tracedmodules.testmod'
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# Ensure that the module is executed in import
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if modname in sys.modules:
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del sys.modules[modname]
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cmd = ("import test.tracedmodules.testmod as t;"
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"t.func(0); t.func2();")
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with captured_stdout() as stdout:
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self._coverage(tracer, cmd)
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stdout.seek(0)
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stdout.readline()
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coverage = {}
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for line in stdout:
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lines, cov, module = line.split()[:3]
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coverage[module] = (int(lines), int(cov[:-1]))
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# XXX This is needed to run regrtest.py as a script
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modname = trace._fullmodname(sys.modules[modname].__file__)
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self.assertIn(modname, coverage)
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self.assertEqual(coverage[modname], (5, 100))
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### Tests that don't mess with sys.settrace and can be traced
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### themselves TODO: Skip tests that do mess with sys.settrace when
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### regrtest is invoked with -T option.
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class Test_Ignore(unittest.TestCase):
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def test_ignored(self):
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jn = os.path.join
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ignore = trace._Ignore(['x', 'y.z'], [jn('foo', 'bar')])
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self.assertTrue(ignore.names('x.py', 'x'))
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self.assertFalse(ignore.names('xy.py', 'xy'))
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self.assertFalse(ignore.names('y.py', 'y'))
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self.assertTrue(ignore.names(jn('foo', 'bar', 'baz.py'), 'baz'))
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self.assertFalse(ignore.names(jn('bar', 'z.py'), 'z'))
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# Matched before.
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self.assertTrue(ignore.names(jn('bar', 'baz.py'), 'baz'))
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class TestCommandLine(unittest.TestCase):
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def test_failures(self):
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_errors = (
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(b'filename is missing: required with the main options', '-l', '-T'),
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(b'cannot specify both --listfuncs and (--trace or --count)', '-lc'),
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(b'argument -R/--no-report: not allowed with argument -r/--report', '-rR'),
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(b'must specify one of --trace, --count, --report, --listfuncs, or --trackcalls', '-g'),
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(b'-r/--report requires -f/--file', '-r'),
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(b'--summary can only be used with --count or --report', '-sT'),
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(b'unrecognized arguments: -y', '-y'))
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for message, *args in _errors:
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*_, stderr = assert_python_failure('-m', 'trace', *args)
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self.assertIn(message, stderr)
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def test_listfuncs_flag_success(self):
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with open(TESTFN, 'w') as fd:
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self.addCleanup(unlink, TESTFN)
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fd.write("a = 1\n")
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status, stdout, stderr = assert_python_ok('-m', 'trace', '-l', TESTFN)
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self.assertIn(b'functions called:', stdout)
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if __name__ == '__main__':
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unittest.main()
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