111 lines
2.8 KiB
Python
111 lines
2.8 KiB
Python
|
# Testing the line trace facility.
|
||
|
|
|
||
|
|
from test import test_support
|
||
|
|
import unittest
|
||
|
|
import sys
|
||
|
|
import difflib
|
||
|
|
|
||
|
|
# A very basic example. If this fails, we're in deep trouble.
|
||
|
|
def basic():
|
||
|
|
return 1
|
||
|
|
|
||
|
|
basic.events = [(0, 'call'),
|
||
|
|
(1, 'line'),
|
||
|
|
(1, 'return')]
|
||
|
|
|
||
|
|
# Armin Rigo's failing example:
|
||
|
|
def arigo_example():
|
||
|
|
x = 1
|
||
|
|
del x
|
||
|
|
while 0:
|
||
|
|
pass
|
||
|
|
x = 1
|
||
|
|
|
||
|
|
arigo_example.events = [(0, 'call'),
|
||
|
|
(1, 'line'),
|
||
|
|
(2, 'line'),
|
||
|
|
(3, 'line'),
|
||
|
|
(5, 'line'),
|
||
|
|
(5, 'return')]
|
||
|
|
|
||
|
|
# check that lines consisting of just one instruction get traced:
|
||
|
|
def one_instr_line():
|
||
|
|
x = 1
|
||
|
|
del x
|
||
|
|
x = 1
|
||
|
|
|
||
|
|
one_instr_line.events = [(0, 'call'),
|
||
|
|
(1, 'line'),
|
||
|
|
(2, 'line'),
|
||
|
|
(3, 'line'),
|
||
|
|
(3, 'return')]
|
||
|
|
|
||
|
|
def no_pop_tops(): # 0
|
||
|
|
x = 1 # 1
|
||
|
|
for a in range(2): # 2
|
||
|
|
if a: # 3
|
||
|
|
x = 1 # 4
|
||
|
|
else: # 5
|
||
|
|
x = 1 # 6
|
||
|
|
|
||
|
|
no_pop_tops.events = [(0, 'call'),
|
||
|
|
(1, 'line'),
|
||
|
|
(2, 'line'),
|
||
|
|
(3, 'line'),
|
||
|
|
(6, 'line'),
|
||
|
|
(2, 'line'),
|
||
|
|
(3, 'line'),
|
||
|
|
(4, 'line'),
|
||
|
|
(2, 'line'),
|
||
|
|
(6, 'return')]
|
||
|
|
|
||
|
|
def no_pop_blocks():
|
||
|
|
while 0:
|
||
|
|
bla
|
||
|
|
x = 1
|
||
|
|
|
||
|
|
no_pop_blocks.events = [(0, 'call'),
|
||
|
|
(1, 'line'),
|
||
|
|
(3, 'line'),
|
||
|
|
(3, 'return')]
|
||
|
|
|
||
|
|
class Tracer:
|
||
|
|
def __init__(self):
|
||
|
|
self.events = []
|
||
|
|
def trace(self, frame, event, arg):
|
||
|
|
self.events.append((frame.f_lineno, event))
|
||
|
|
return self.trace
|
||
|
|
|
||
|
|
class TraceTestCase(unittest.TestCase):
|
||
|
|
def run_test(self, func):
|
||
|
|
tracer = Tracer()
|
||
|
|
sys.settrace(tracer.trace)
|
||
|
|
func()
|
||
|
|
sys.settrace(None)
|
||
|
|
fl = func.func_code.co_firstlineno
|
||
|
|
events = [(l - fl, e) for (l, e) in tracer.events]
|
||
|
|
if events != func.events:
|
||
|
|
self.fail(
|
||
|
|
"events did not match expectation:\n" +
|
||
|
|
"\n".join(difflib.ndiff(map(str, func.events),
|
||
|
|
map(str, events))))
|
||
|
|
|
||
|
|
def test_1_basic(self):
|
||
|
|
self.run_test(basic)
|
||
|
|
def test_2_arigo(self):
|
||
|
|
self.run_test(arigo_example)
|
||
|
|
def test_3_one_instr(self):
|
||
|
|
self.run_test(one_instr_line)
|
||
|
|
def test_4_no_pop_blocks(self):
|
||
|
|
self.run_test(no_pop_blocks)
|
||
|
|
def test_5_no_pop_tops(self):
|
||
|
|
self.run_test(no_pop_tops)
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
def test_main():
|
||
|
|
test_support.run_unittest(TraceTestCase)
|
||
|
|
|
||
|
|
if __name__ == "__main__":
|
||
|
|
test_main()
|