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# A test suite for pdb; not very comprehensive at the moment.
import doctest
import os
import pdb
import sys
import types
import codecs
import unittest
import subprocess
import textwrap
import linecache
import zipapp
from contextlib import ExitStack, redirect_stdout
from io import StringIO
from test import support
from test.support import force_not_colorized, os_helper
from test.support.import_helper import import_module
from test.support.pty_helper import run_pty, FakeInput
from unittest.mock import patch
# gh-114275: WASI fails to run asyncio tests, similar skip than test_asyncio.
SKIP_ASYNCIO_TESTS = (not support.has_socket_support)
class PdbTestInput(object):
"""Context manager that makes testing Pdb in doctests easier."""
def __init__(self, input):
self.input = input
def __enter__(self):
self.real_stdin = sys.stdin
sys.stdin = FakeInput(self.input)
self.orig_trace = sys.gettrace() if hasattr(sys, 'gettrace') else None
def __exit__(self, *exc):
sys.stdin = self.real_stdin
if self.orig_trace:
sys.settrace(self.orig_trace)
def test_pdb_displayhook():
"""This tests the custom displayhook for pdb.
>>> def test_function(foo, bar):
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
>>> with PdbTestInput([
... 'foo',
... 'bar',
... 'for i in range(5): print(i)',
... 'continue',
... ]):
... test_function(1, None)
> <doctest test.test_pdb.test_pdb_displayhook[0]>(2)test_function()
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) foo
1
(Pdb) bar
(Pdb) for i in range(5): print(i)
0
1
2
3
4
(Pdb) continue
"""
def test_pdb_basic_commands():
"""Test the basic commands of pdb.
>>> def test_function_2(foo, bar='default'):
... print(foo)
... for i in range(5):
... print(i)
... print(bar)
... for i in range(10):
... never_executed
... print('after for')
... print('...')
... return foo.upper()
>>> def test_function3(arg=None, *, kwonly=None):
... pass
>>> def test_function4(a, b, c, /):
... pass
>>> def test_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... ret = test_function_2('baz')
... test_function3(kwonly=True)
... test_function4(1, 2, 3)
... print(ret)
>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... 'step', # go to line ret = test_function_2('baz')
... 'step', # entering the function call
... 'args', # display function args
... 'list', # list function source
... 'bt', # display backtrace
... 'up', # step up to test_function()
... 'down', # step down to test_function_2() again
... 'next', # stepping to print(foo)
... 'next', # stepping to the for loop
... 'step', # stepping into the for loop
... 'until', # continuing until out of the for loop
... 'next', # executing the print(bar)
... 'jump 8', # jump over second for loop
... 'return', # return out of function
... 'retval', # display return value
... 'next', # step to test_function3()
... 'step', # stepping into test_function3()
... 'args', # display function args
... 'return', # return out of function
... 'next', # step to test_function4()
... 'step', # stepping to test_function4()
... 'args', # display function args
... 'continue',
... ]):
... test_function()
> <doctest test.test_pdb.test_pdb_basic_commands[3]>(2)test_function()
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) step
> <doctest test.test_pdb.test_pdb_basic_commands[3]>(3)test_function()
-> ret = test_function_2('baz')
(Pdb) step
--Call--
> <doctest test.test_pdb.test_pdb_basic_commands[0]>(1)test_function_2()
-> def test_function_2(foo, bar='default'):
(Pdb) args
foo = 'baz'
bar = 'default'
(Pdb) list
1 -> def test_function_2(foo, bar='default'):
2 print(foo)
3 for i in range(5):
4 print(i)
5 print(bar)
6 for i in range(10):
7 never_executed
8 print('after for')
9 print('...')
10 return foo.upper()
[EOF]
(Pdb) bt
...
<doctest test.test_pdb.test_pdb_basic_commands[4]>(26)<module>()
-> test_function()
<doctest test.test_pdb.test_pdb_basic_commands[3]>(3)test_function()
-> ret = test_function_2('baz')
> <doctest test.test_pdb.test_pdb_basic_commands[0]>(1)test_function_2()
-> def test_function_2(foo, bar='default'):
(Pdb) up
> <doctest test.test_pdb.test_pdb_basic_commands[3]>(3)test_function()
-> ret = test_function_2('baz')
(Pdb) down
> <doctest test.test_pdb.test_pdb_basic_commands[0]>(1)test_function_2()
-> def test_function_2(foo, bar='default'):
(Pdb) next
> <doctest test.test_pdb.test_pdb_basic_commands[0]>(2)test_function_2()
-> print(foo)
(Pdb) next
baz
> <doctest test.test_pdb.test_pdb_basic_commands[0]>(3)test_function_2()
-> for i in range(5):
(Pdb) step
> <doctest test.test_pdb.test_pdb_basic_commands[0]>(4)test_function_2()
-> print(i)
(Pdb) until
0
1
2
3
4
> <doctest test.test_pdb.test_pdb_basic_commands[0]>(5)test_function_2()
-> print(bar)
(Pdb) next
default
> <doctest test.test_pdb.test_pdb_basic_commands[0]>(6)test_function_2()
-> for i in range(10):
(Pdb) jump 8
> <doctest test.test_pdb.test_pdb_basic_commands[0]>(8)test_function_2()
-> print('after for')
(Pdb) return
after for
...
--Return--
> <doctest test.test_pdb.test_pdb_basic_commands[0]>(10)test_function_2()->'BAZ'
-> return foo.upper()
(Pdb) retval
'BAZ'
(Pdb) next
> <doctest test.test_pdb.test_pdb_basic_commands[3]>(4)test_function()
-> test_function3(kwonly=True)
(Pdb) step
--Call--
> <doctest test.test_pdb.test_pdb_basic_commands[1]>(1)test_function3()
-> def test_function3(arg=None, *, kwonly=None):
(Pdb) args
arg = None
kwonly = True
(Pdb) return
--Return--
> <doctest test.test_pdb.test_pdb_basic_commands[1]>(2)test_function3()->None
-> pass
(Pdb) next
> <doctest test.test_pdb.test_pdb_basic_commands[3]>(5)test_function()
-> test_function4(1, 2, 3)
(Pdb) step
--Call--
> <doctest test.test_pdb.test_pdb_basic_commands[2]>(1)test_function4()
-> def test_function4(a, b, c, /):
(Pdb) args
a = 1
b = 2
c = 3
(Pdb) continue
BAZ
"""
def reset_Breakpoint():
import bdb
bdb.Breakpoint.clearBreakpoints()
def test_pdb_breakpoint_commands():
"""Test basic commands related to breakpoints.
>>> def test_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... print(1)
... print(2)
... print(3)
... print(4)
First, need to clear bdb state that might be left over from previous tests.
Otherwise, the new breakpoints might get assigned different numbers.
>>> reset_Breakpoint()
Now test the breakpoint commands. NORMALIZE_WHITESPACE is needed because
the breakpoint list outputs a tab for the "stop only" and "ignore next"
lines, which we don't want to put in here.
>>> with PdbTestInput([ # doctest: +NORMALIZE_WHITESPACE
... 'break 3',
... 'break 4, +',
... 'disable 1',
... 'ignore 1 10',
... 'condition 1 1 < 2',
... 'condition 1 1 <',
... 'break 4',
... 'break 4',
... 'break',
... 'clear 3',
... 'break',
... 'condition 1',
... 'enable 1',
... 'clear 1',
... 'commands 2',
... 'p "42"',
... 'print("42", 7*6)', # Issue 18764 (not about breakpoints)
... 'end',
... 'continue', # will stop at breakpoint 2 (line 4)
... 'clear', # clear all!
... 'y',
... 'tbreak 5',
... 'continue', # will stop at temporary breakpoint
... 'break', # make sure breakpoint is gone
... 'commands 10', # out of range
... 'commands a', # display help
... 'commands 4', # already deleted
... 'break 6, undefined', # condition causing `NameError` during evaluation
... 'continue', # will stop, ignoring runtime error
... 'continue',
... ]):
... test_function()
> <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>(2)test_function()
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) break 3
Breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
(Pdb) break 4, +
*** Invalid condition +: SyntaxError: invalid syntax
(Pdb) disable 1
Disabled breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
(Pdb) ignore 1 10
Will ignore next 10 crossings of breakpoint 1.
(Pdb) condition 1 1 < 2
New condition set for breakpoint 1.
(Pdb) condition 1 1 <
*** Invalid condition 1 <: SyntaxError: invalid syntax
(Pdb) break 4
Breakpoint 2 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
(Pdb) break 4
Breakpoint 3 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
(Pdb) break
Num Type Disp Enb Where
1 breakpoint keep no at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
stop only if 1 < 2
ignore next 10 hits
2 breakpoint keep yes at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
3 breakpoint keep yes at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
(Pdb) clear 3
Deleted breakpoint 3 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
(Pdb) break
Num Type Disp Enb Where
1 breakpoint keep no at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
stop only if 1 < 2
ignore next 10 hits
2 breakpoint keep yes at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
(Pdb) condition 1
Breakpoint 1 is now unconditional.
(Pdb) enable 1
Enabled breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
(Pdb) clear 1
Deleted breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
(Pdb) commands 2
(com) p "42"
(com) print("42", 7*6)
(com) end
(Pdb) continue
1
'42'
42 42
> <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>(4)test_function()
-> print(2)
(Pdb) clear
Clear all breaks? y
Deleted breakpoint 2 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
(Pdb) tbreak 5
Breakpoint 4 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:5
(Pdb) continue
2
Deleted breakpoint 4 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:5
> <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>(5)test_function()
-> print(3)
(Pdb) break
(Pdb) commands 10
*** cannot set commands: Breakpoint number 10 out of range
(Pdb) commands a
*** Invalid argument: a
Usage: (Pdb) commands [bpnumber]
(com) ...
(com) end
(Pdb)
(Pdb) commands 4
*** cannot set commands: Breakpoint 4 already deleted
(Pdb) break 6, undefined
Breakpoint 5 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:6
(Pdb) continue
3
> <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>(6)test_function()
-> print(4)
(Pdb) continue
4
"""
def test_pdb_breakpoint_with_filename():
"""Breakpoints with filename:lineno
>>> def test_function():
... # inspect_fodder2 is a great module as the line number is stable
... from test.test_inspect import inspect_fodder2 as mod2
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... mod2.func88()
... mod2.func114()
... # Be a good citizen and clean up the mess
... reset_Breakpoint()
First, need to clear bdb state that might be left over from previous tests.
Otherwise, the new breakpoints might get assigned different numbers.
>>> reset_Breakpoint()
>>> with PdbTestInput([ # doctest: +NORMALIZE_WHITESPACE +ELLIPSIS
... 'break test.test_inspect.inspect_fodder2:90',
... 'continue', # will stop at func88
... 'break test/test_inspect/inspect_fodder2.py:115',
... 'continue', # will stop at func114
... 'continue',
... ]):
... test_function()
> <doctest test.test_pdb.test_pdb_breakpoint_with_filename[0]>(4)test_function()
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) break test.test_inspect.inspect_fodder2:90
Breakpoint 1 at ...inspect_fodder2.py:90
(Pdb) continue
> ...inspect_fodder2.py(90)func88()
-> return 90
(Pdb) break test/test_inspect/inspect_fodder2.py:115
Breakpoint 2 at ...inspect_fodder2.py:115
(Pdb) continue
> ...inspect_fodder2.py(115)func114()
-> return 115
(Pdb) continue
"""
def test_pdb_breakpoints_preserved_across_interactive_sessions():
"""Breakpoints are remembered between interactive sessions
>>> reset_Breakpoint()
>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... 'import test.test_pdb',
... 'break test.test_pdb.do_something',
... 'break test.test_pdb.do_nothing',
... 'break',
... 'continue',
... ]):
... pdb.run('print()')
> <string>(1)<module>()...
(Pdb) import test.test_pdb
(Pdb) break test.test_pdb.do_something
Breakpoint 1 at ...test_pdb.py:...
(Pdb) break test.test_pdb.do_nothing
Breakpoint 2 at ...test_pdb.py:...
(Pdb) break
Num Type Disp Enb Where
1 breakpoint keep yes at ...test_pdb.py:...
2 breakpoint keep yes at ...test_pdb.py:...
(Pdb) continue
>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... 'break',
... 'break pdb.find_function',
... 'break',
... 'clear 1',
... 'continue',
... ]):
... pdb.run('print()')
> <string>(1)<module>()...
(Pdb) break
Num Type Disp Enb Where
1 breakpoint keep yes at ...test_pdb.py:...
2 breakpoint keep yes at ...test_pdb.py:...
(Pdb) break pdb.find_function
Breakpoint 3 at ...pdb.py:...
(Pdb) break
Num Type Disp Enb Where
1 breakpoint keep yes at ...test_pdb.py:...
2 breakpoint keep yes at ...test_pdb.py:...
3 breakpoint keep yes at ...pdb.py:...
(Pdb) clear 1
Deleted breakpoint 1 at ...test_pdb.py:...
(Pdb) continue
>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... 'break',
... 'clear 2',
... 'clear 3',
... 'continue',
... ]):
... pdb.run('print()')
> <string>(1)<module>()...
(Pdb) break
Num Type Disp Enb Where
2 breakpoint keep yes at ...test_pdb.py:...
3 breakpoint keep yes at ...pdb.py:...
(Pdb) clear 2
Deleted breakpoint 2 at ...test_pdb.py:...
(Pdb) clear 3
Deleted breakpoint 3 at ...pdb.py:...
(Pdb) continue
"""
def test_pdb_pp_repr_exc():
"""Test that do_p/do_pp do not swallow exceptions.
>>> class BadRepr:
... def __repr__(self):
... raise Exception('repr_exc')
>>> obj = BadRepr()
>>> def test_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
>>> with PdbTestInput([ # doctest: +NORMALIZE_WHITESPACE
... 'p obj',
... 'pp obj',
... 'continue',
... ]):
... test_function()
> <doctest test.test_pdb.test_pdb_pp_repr_exc[2]>(2)test_function()
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) p obj
*** Exception: repr_exc
(Pdb) pp obj
*** Exception: repr_exc
(Pdb) continue
"""
def do_nothing():
pass
def do_something():
print(42)
def test_list_commands():
"""Test the list and source commands of pdb.
>>> def test_function_2(foo):
... import test.test_pdb
... test.test_pdb.do_nothing()
... 'some...'
... 'more...'
... 'code...'
... 'to...'
... 'make...'
... 'a...'
... 'long...'
... 'listing...'
... 'useful...'
... '...'
... '...'
... return foo
>>> def test_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... ret = test_function_2('baz')
>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... 'step', # go to the test function line
... 'list', # list first function
... 'step', # step into second function
... 'list', # list second function
... 'list', # continue listing to EOF
... 'list 1,3', # list specific lines
... 'list x', # invalid argument
... 'next', # step to import
... 'next', # step over import
... 'step', # step into do_nothing
... 'longlist', # list all lines
... 'source do_something', # list all lines of function
... 'source fooxxx', # something that doesn't exit
... 'continue',
... ]):
... test_function()
> <doctest test.test_pdb.test_list_commands[1]>(2)test_function()
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) step
> <doctest test.test_pdb.test_list_commands[1]>(3)test_function()
-> ret = test_function_2('baz')
(Pdb) list
1 def test_function():
2 import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
3 -> ret = test_function_2('baz')
[EOF]
(Pdb) step
--Call--
> <doctest test.test_pdb.test_list_commands[0]>(1)test_function_2()
-> def test_function_2(foo):
(Pdb) list
1 -> def test_function_2(foo):
2 import test.test_pdb
3 test.test_pdb.do_nothing()
4 'some...'
5 'more...'
6 'code...'
7 'to...'
8 'make...'
9 'a...'
10 'long...'
11 'listing...'
(Pdb) list
12 'useful...'
13 '...'
14 '...'
15 return foo
[EOF]
(Pdb) list 1,3
1 -> def test_function_2(foo):
2 import test.test_pdb
3 test.test_pdb.do_nothing()
(Pdb) list x
*** ...
(Pdb) next
> <doctest test.test_pdb.test_list_commands[0]>(2)test_function_2()
-> import test.test_pdb
(Pdb) next
> <doctest test.test_pdb.test_list_commands[0]>(3)test_function_2()
-> test.test_pdb.do_nothing()
(Pdb) step
--Call--
> ...test_pdb.py(...)do_nothing()
-> def do_nothing():
(Pdb) longlist
... -> def do_nothing():
... pass
(Pdb) source do_something
... def do_something():
... print(42)
(Pdb) source fooxxx
*** ...
(Pdb) continue
"""
def test_pdb_whatis_command():
"""Test the whatis command
>>> myvar = (1,2)
>>> def myfunc():
... pass
>>> class MyClass:
... def mymethod(self):
... pass
>>> def test_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... 'whatis myvar',
... 'whatis myfunc',
... 'whatis MyClass',
... 'whatis MyClass()',
... 'whatis MyClass.mymethod',
... 'whatis MyClass().mymethod',
... 'continue',
... ]):
... test_function()
> <doctest test.test_pdb.test_pdb_whatis_command[3]>(2)test_function()
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) whatis myvar
<class 'tuple'>
(Pdb) whatis myfunc
Function myfunc
(Pdb) whatis MyClass
Class test.test_pdb.MyClass
(Pdb) whatis MyClass()
<class 'test.test_pdb.MyClass'>
(Pdb) whatis MyClass.mymethod
Function mymethod
(Pdb) whatis MyClass().mymethod
Method mymethod
(Pdb) continue
"""
def test_pdb_display_command():
"""Test display command
>>> def test_function():
... a = 0
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... a = 1
... a = 2
... a = 3
... a = 4
>>> with PdbTestInput([ # doctest: +ELLIPSIS
... 's',
... 'display +',
... 'display',
... 'display a',
... 'n',
... 'display',
... 'undisplay a',
... 'n',
... 'display a',
... 'undisplay',
... 'display a < 1',
... 'n',
... 'display undefined',
... 'continue',
... ]):
... test_function()
> <doctest test.test_pdb.test_pdb_display_command[0]>(3)test_function()
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) s
> <doctest test.test_pdb.test_pdb_display_command[0]>(4)test_function()
-> a = 1
(Pdb) display +
*** Unable to display +: SyntaxError: invalid syntax
(Pdb) display
No expression is being displayed
(Pdb) display a
display a: 0
(Pdb) n
> <doctest test.test_pdb.test_pdb_display_command[0]>(5)test_function()
-> a = 2
display a: 1 [old: 0]
(Pdb) display
Currently displaying:
a: 1
(Pdb) undisplay a
(Pdb) n
> <doctest test.test_pdb.test_pdb_display_command[0]>(6)test_function()
-> a = 3
(Pdb) display a
display a: 2
(Pdb) undisplay
(Pdb) display a < 1
display a < 1: False
(Pdb) n
> <doctest test.test_pdb.test_pdb_display_command[0]>(7)test_function()
-> a = 4
(Pdb) display undefined
display undefined: ** raised NameError: name 'undefined' is not defined **
(Pdb) continue
"""
def test_pdb_alias_command():
"""Test alias command
>>> class A:
... def __init__(self):
... self.attr1 = 10
... self.attr2 = 'str'
... def method(self):
... pass
>>> def test_function():
... o = A()
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... o.method()
>>> with PdbTestInput([ # doctest: +ELLIPSIS
... 's',
... 'alias pi',
... 'alias pi for k in %1.__dict__.keys(): print(f"%1.{k} = {%1.__dict__[k]}")',
... 'alias ps pi self',
... 'alias ps',
... 'pi o',
... 's',
... 'ps',
... 'alias myp p %2',
... 'alias myp',
... 'alias myp p %1',
... 'myp',
... 'myp 1',
... 'myp 1 2',
... 'alias repeat_second_arg p "%* %2"',
... 'repeat_second_arg 1 2 3',
... 'continue',
... ]):
... test_function()
> <doctest test.test_pdb.test_pdb_alias_command[1]>(3)test_function()
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) s
> <doctest test.test_pdb.test_pdb_alias_command[1]>(4)test_function()
-> o.method()
(Pdb) alias pi
*** Unknown alias 'pi'
(Pdb) alias pi for k in %1.__dict__.keys(): print(f"%1.{k} = {%1.__dict__[k]}")
(Pdb) alias ps pi self
(Pdb) alias ps
ps = pi self
(Pdb) pi o
o.attr1 = 10
o.attr2 = str
(Pdb) s
--Call--
> <doctest test.test_pdb.test_pdb_alias_command[0]>(5)method()
-> def method(self):
(Pdb) ps
self.attr1 = 10
self.attr2 = str
(Pdb) alias myp p %2
*** Replaceable parameters must be consecutive
(Pdb) alias myp
*** Unknown alias 'myp'
(Pdb) alias myp p %1
(Pdb) myp
*** Not enough arguments for alias 'myp'
(Pdb) myp 1
1
(Pdb) myp 1 2
*** Too many arguments for alias 'myp'
(Pdb) alias repeat_second_arg p "%* %2"
(Pdb) repeat_second_arg 1 2 3
'1 2 3 2'
(Pdb) continue
"""
def test_pdb_where_command():
"""Test where command
>>> def g():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
>>> def f():
... g();
>>> def test_function():
... f()
>>> with PdbTestInput([ # doctest: +ELLIPSIS
... 'w',
... 'where',
... 'u',
... 'w',
... 'continue',
... ]):
... test_function()
> <doctest test.test_pdb.test_pdb_where_command[0]>(2)g()
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) w
...
<doctest test.test_pdb.test_pdb_where_command[3]>(8)<module>()
-> test_function()
<doctest test.test_pdb.test_pdb_where_command[2]>(2)test_function()
-> f()
<doctest test.test_pdb.test_pdb_where_command[1]>(2)f()
-> g();
> <doctest test.test_pdb.test_pdb_where_command[0]>(2)g()
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) where
...
<doctest test.test_pdb.test_pdb_where_command[3]>(8)<module>()
-> test_function()
<doctest test.test_pdb.test_pdb_where_command[2]>(2)test_function()
-> f()
<doctest test.test_pdb.test_pdb_where_command[1]>(2)f()
-> g();
> <doctest test.test_pdb.test_pdb_where_command[0]>(2)g()
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) u
> <doctest test.test_pdb.test_pdb_where_command[1]>(2)f()
-> g();
(Pdb) w
...
<doctest test.test_pdb.test_pdb_where_command[3]>(8)<module>()
-> test_function()
<doctest test.test_pdb.test_pdb_where_command[2]>(2)test_function()
-> f()
> <doctest test.test_pdb.test_pdb_where_command[1]>(2)f()
-> g();
<doctest test.test_pdb.test_pdb_where_command[0]>(2)g()
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) continue
"""
# skip this test if sys.flags.no_site = True;
# exit() isn't defined unless there's a site module.
if not sys.flags.no_site:
def test_pdb_interact_command():
"""Test interact command
>>> g = 0
>>> dict_g = {}
>>> def test_function():
... x = 1
... lst_local = []
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... 'interact',
... 'x',
... 'g',
... 'x = 2',
... 'g = 3',
... 'dict_g["a"] = True',
... 'lst_local.append(x)',
... 'exit()',
... 'p x',
... 'p g',
... 'p dict_g',
... 'p lst_local',
... 'continue',
... ]):
... test_function()
> <doctest test.test_pdb.test_pdb_interact_command[2]>(4)test_function()
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) interact
*pdb interact start*
... x
1
... g
0
... x = 2
... g = 3
... dict_g["a"] = True
... lst_local.append(x)
... exit()
*exit from pdb interact command*
(Pdb) p x
1
(Pdb) p g
0
(Pdb) p dict_g
{'a': True}
(Pdb) p lst_local
[2]
(Pdb) continue
"""
def test_convenience_variables():
"""Test convenience variables
>>> def util_function():
... import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
... try:
... raise Exception('test')
... except:
... pass
... return 1
>>> def test_function():
... util_function()
>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
... 'step', # Step to try statement
... '$_frame.f_lineno', # Check frame convenience variable
... '$ _frame', # This should be a syntax error
... '$a = 10', # Set a convenience variable
... '$a', # Print its value
... 'p "$a"', # Print the string $a
... 'p $a + 2', # Do some calculation
... 'p f"$a = {$a}"', # Make sure $ in string is not converted and f-string works
... 'u', # Switch frame
... '$_frame.f_lineno', # Make sure the frame changed
... '$a', # Make sure the value persists
... 'd', # Go back to the original frame
... 'next',
... '$a', # The value should be gone
... 'next',
... '$_exception', # Check exception convenience variable
... 'next',
... '$_exception', # Exception should be gone
... 'return',
... '$_retval', # Check return convenience variable
... 'continue',
... ]):
... test_function()
> <doctest test.test_pdb.test_convenience_variables[0]>(2)util_function()
-> import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
(Pdb) step
> <doctest test.test_pdb.test_convenience_variables[0]>(3)util_function()
-> try:
(Pdb) $_frame.f_lineno
3
(Pdb) $ _frame
*** SyntaxError: invalid syntax
(Pdb) $a = 10
(Pdb) $a
10
(Pdb) p "$a"
'$a'
(Pdb) p $a + 2
12
(Pdb) p f"$a = {$a}"
'$a = 10'
(Pdb) u
> <doctest test.test_pdb.test_convenience_variables[1]>(2)test_function()
-> util_function()
(Pdb) $_frame.f_lineno
2
(Pdb) $a
10
(Pdb) d
> <doctest test.test_pdb.test_convenience_variables[0]>(3)util_function()
-> try:
(Pdb) next
> <doctest test.test_pdb.test_convenience_variables[0]>(4)util_function()
-> raise Exception('test')
(Pdb) $a
*** KeyError: 'a'
(Pdb) next
Exception: test
> <doctest test.test_pdb.test_convenience_variables[0]>(4)util_function()
-> raise Exception('test')
(Pdb) $_exception
Exception('test')
(Pdb) next
> <doctest test.test_pdb.test_convenience_variables[0]>(5)util_function()
-> except:
(Pdb) $_exception
*** KeyError: '_exception'
(Pdb) return
--Return--
> <doctest test.test_pdb.test_convenience_variables[0]>(7)util_function()->1
-> return 1
(Pdb) $_retval
1
(Pdb) continue
"""
def test_post_mortem_chained():
"""Test post mortem traceback debugging of chained exception
>>> def test_function_2():
... try:
... 1/0
... finally:
... print('Exception!')
>>> def test_function_reraise():
... try:
... test_function_2()
... except ZeroDivisionError as e:
... raise ZeroDivisionError('reraised') from e
>>> def test_function():
... import pdb;
... instance = pdb.Pdb(nosigint=True, readrc=False)