709 lines
22 KiB
Python
709 lines
22 KiB
Python
# A test suite for pdb; not very comprehensive at the moment.
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import imp
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import pdb
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import sys
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import unittest
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import subprocess
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import textwrap
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from test import support
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# This little helper class is essential for testing pdb under doctest.
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from test.test_doctest import _FakeInput
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class PdbTestInput(object):
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"""Context manager that makes testing Pdb in doctests easier."""
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def __init__(self, input):
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self.input = input
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def __enter__(self):
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self.real_stdin = sys.stdin
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sys.stdin = _FakeInput(self.input)
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def __exit__(self, *exc):
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sys.stdin = self.real_stdin
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def test_pdb_displayhook():
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"""This tests the custom displayhook for pdb.
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>>> def test_function(foo, bar):
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... import pdb; pdb.Pdb(nosigint=True).set_trace()
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... pass
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>>> with PdbTestInput([
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... 'foo',
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... 'bar',
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... 'for i in range(5): print(i)',
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... 'continue',
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... ]):
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... test_function(1, None)
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> <doctest test.test_pdb.test_pdb_displayhook[0]>(3)test_function()
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-> pass
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(Pdb) foo
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1
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(Pdb) bar
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(Pdb) for i in range(5): print(i)
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0
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1
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2
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3
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4
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(Pdb) continue
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"""
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def test_pdb_basic_commands():
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"""Test the basic commands of pdb.
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>>> def test_function_2(foo, bar='default'):
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... print(foo)
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... for i in range(5):
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... print(i)
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... print(bar)
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... for i in range(10):
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... never_executed
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... print('after for')
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... print('...')
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... return foo.upper()
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>>> def test_function():
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... import pdb; pdb.Pdb(nosigint=True).set_trace()
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... ret = test_function_2('baz')
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... print(ret)
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>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
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... 'step', # entering the function call
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... 'args', # display function args
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... 'list', # list function source
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... 'bt', # display backtrace
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... 'up', # step up to test_function()
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... 'down', # step down to test_function_2() again
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... 'next', # stepping to print(foo)
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... 'next', # stepping to the for loop
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... 'step', # stepping into the for loop
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... 'until', # continuing until out of the for loop
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... 'next', # executing the print(bar)
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... 'jump 8', # jump over second for loop
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... 'return', # return out of function
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... 'retval', # display return value
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... 'continue',
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... ]):
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... test_function()
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> <doctest test.test_pdb.test_pdb_basic_commands[1]>(3)test_function()
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-> ret = test_function_2('baz')
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(Pdb) step
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--Call--
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> <doctest test.test_pdb.test_pdb_basic_commands[0]>(1)test_function_2()
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-> def test_function_2(foo, bar='default'):
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(Pdb) args
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foo = 'baz'
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bar = 'default'
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(Pdb) list
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1 -> def test_function_2(foo, bar='default'):
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2 print(foo)
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3 for i in range(5):
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4 print(i)
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5 print(bar)
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6 for i in range(10):
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7 never_executed
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8 print('after for')
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9 print('...')
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10 return foo.upper()
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[EOF]
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(Pdb) bt
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...
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<doctest test.test_pdb.test_pdb_basic_commands[2]>(18)<module>()
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-> test_function()
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<doctest test.test_pdb.test_pdb_basic_commands[1]>(3)test_function()
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-> ret = test_function_2('baz')
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> <doctest test.test_pdb.test_pdb_basic_commands[0]>(1)test_function_2()
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-> def test_function_2(foo, bar='default'):
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(Pdb) up
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> <doctest test.test_pdb.test_pdb_basic_commands[1]>(3)test_function()
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-> ret = test_function_2('baz')
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(Pdb) down
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> <doctest test.test_pdb.test_pdb_basic_commands[0]>(1)test_function_2()
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-> def test_function_2(foo, bar='default'):
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(Pdb) next
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> <doctest test.test_pdb.test_pdb_basic_commands[0]>(2)test_function_2()
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-> print(foo)
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(Pdb) next
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baz
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> <doctest test.test_pdb.test_pdb_basic_commands[0]>(3)test_function_2()
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-> for i in range(5):
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(Pdb) step
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> <doctest test.test_pdb.test_pdb_basic_commands[0]>(4)test_function_2()
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-> print(i)
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(Pdb) until
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0
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1
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2
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3
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4
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> <doctest test.test_pdb.test_pdb_basic_commands[0]>(5)test_function_2()
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-> print(bar)
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(Pdb) next
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default
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> <doctest test.test_pdb.test_pdb_basic_commands[0]>(6)test_function_2()
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-> for i in range(10):
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(Pdb) jump 8
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> <doctest test.test_pdb.test_pdb_basic_commands[0]>(8)test_function_2()
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-> print('after for')
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(Pdb) return
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after for
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...
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--Return--
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> <doctest test.test_pdb.test_pdb_basic_commands[0]>(10)test_function_2()->'BAZ'
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-> return foo.upper()
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(Pdb) retval
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'BAZ'
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(Pdb) continue
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BAZ
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"""
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def test_pdb_breakpoint_commands():
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"""Test basic commands related to breakpoints.
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>>> def test_function():
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... import pdb; pdb.Pdb(nosigint=True).set_trace()
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... print(1)
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... print(2)
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... print(3)
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... print(4)
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First, need to clear bdb state that might be left over from previous tests.
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Otherwise, the new breakpoints might get assigned different numbers.
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>>> from bdb import Breakpoint
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>>> Breakpoint.next = 1
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>>> Breakpoint.bplist = {}
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>>> Breakpoint.bpbynumber = [None]
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Now test the breakpoint commands. NORMALIZE_WHITESPACE is needed because
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the breakpoint list outputs a tab for the "stop only" and "ignore next"
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lines, which we don't want to put in here.
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>>> with PdbTestInput([ # doctest: +NORMALIZE_WHITESPACE
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... 'break 3',
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... 'disable 1',
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... 'ignore 1 10',
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... 'condition 1 1 < 2',
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... 'break 4',
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... 'break 4',
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... 'break',
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... 'clear 3',
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... 'break',
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... 'condition 1',
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... 'enable 1',
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... 'clear 1',
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... 'commands 2',
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... 'print 42',
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... 'end',
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... 'continue', # will stop at breakpoint 2 (line 4)
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... 'clear', # clear all!
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... 'y',
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... 'tbreak 5',
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... 'continue', # will stop at temporary breakpoint
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... 'break', # make sure breakpoint is gone
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... 'continue',
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... ]):
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... test_function()
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> <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>(3)test_function()
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-> print(1)
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(Pdb) break 3
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Breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
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(Pdb) disable 1
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Disabled breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
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(Pdb) ignore 1 10
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Will ignore next 10 crossings of breakpoint 1.
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(Pdb) condition 1 1 < 2
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New condition set for breakpoint 1.
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(Pdb) break 4
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Breakpoint 2 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
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(Pdb) break 4
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Breakpoint 3 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
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(Pdb) break
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Num Type Disp Enb Where
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1 breakpoint keep no at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
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stop only if 1 < 2
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ignore next 10 hits
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2 breakpoint keep yes at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
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3 breakpoint keep yes at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
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(Pdb) clear 3
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Deleted breakpoint 3 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
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(Pdb) break
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Num Type Disp Enb Where
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1 breakpoint keep no at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
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stop only if 1 < 2
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ignore next 10 hits
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2 breakpoint keep yes at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
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(Pdb) condition 1
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Breakpoint 1 is now unconditional.
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(Pdb) enable 1
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Enabled breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
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(Pdb) clear 1
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Deleted breakpoint 1 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:3
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(Pdb) commands 2
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(com) print 42
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(com) end
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(Pdb) continue
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1
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42
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> <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>(4)test_function()
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-> print(2)
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(Pdb) clear
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Clear all breaks? y
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Deleted breakpoint 2 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:4
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(Pdb) tbreak 5
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Breakpoint 4 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:5
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(Pdb) continue
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2
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Deleted breakpoint 4 at <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>:5
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> <doctest test.test_pdb.test_pdb_breakpoint_commands[0]>(5)test_function()
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-> print(3)
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(Pdb) break
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(Pdb) continue
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3
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4
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"""
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def do_nothing():
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pass
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def do_something():
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print(42)
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def test_list_commands():
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"""Test the list and source commands of pdb.
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>>> def test_function_2(foo):
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... import test.test_pdb
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... test.test_pdb.do_nothing()
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... 'some...'
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... 'more...'
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... 'code...'
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... 'to...'
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... 'make...'
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... 'a...'
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... 'long...'
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... 'listing...'
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... 'useful...'
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... '...'
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... '...'
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... return foo
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>>> def test_function():
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... import pdb; pdb.Pdb(nosigint=True).set_trace()
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... ret = test_function_2('baz')
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>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
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... 'list', # list first function
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... 'step', # step into second function
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... 'list', # list second function
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... 'list', # continue listing to EOF
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... 'list 1,3', # list specific lines
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... 'list x', # invalid argument
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... 'next', # step to import
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... 'next', # step over import
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... 'step', # step into do_nothing
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... 'longlist', # list all lines
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... 'source do_something', # list all lines of function
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... 'source fooxxx', # something that doesn't exit
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... 'continue',
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... ]):
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... test_function()
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> <doctest test.test_pdb.test_list_commands[1]>(3)test_function()
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-> ret = test_function_2('baz')
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(Pdb) list
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1 def test_function():
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2 import pdb; pdb.Pdb(nosigint=True).set_trace()
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3 -> ret = test_function_2('baz')
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[EOF]
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(Pdb) step
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--Call--
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> <doctest test.test_pdb.test_list_commands[0]>(1)test_function_2()
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-> def test_function_2(foo):
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(Pdb) list
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1 -> def test_function_2(foo):
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2 import test.test_pdb
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3 test.test_pdb.do_nothing()
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4 'some...'
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5 'more...'
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6 'code...'
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7 'to...'
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8 'make...'
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9 'a...'
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10 'long...'
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11 'listing...'
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(Pdb) list
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12 'useful...'
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13 '...'
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14 '...'
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15 return foo
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[EOF]
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(Pdb) list 1,3
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1 -> def test_function_2(foo):
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2 import test.test_pdb
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3 test.test_pdb.do_nothing()
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(Pdb) list x
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*** ...
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(Pdb) next
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> <doctest test.test_pdb.test_list_commands[0]>(2)test_function_2()
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-> import test.test_pdb
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(Pdb) next
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> <doctest test.test_pdb.test_list_commands[0]>(3)test_function_2()
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-> test.test_pdb.do_nothing()
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(Pdb) step
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--Call--
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> ...test_pdb.py(...)do_nothing()
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-> def do_nothing():
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(Pdb) longlist
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... -> def do_nothing():
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... pass
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(Pdb) source do_something
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... def do_something():
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... print(42)
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(Pdb) source fooxxx
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*** ...
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(Pdb) continue
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"""
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def test_post_mortem():
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"""Test post mortem traceback debugging.
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>>> def test_function_2():
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... try:
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... 1/0
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... finally:
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... print('Exception!')
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>>> def test_function():
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... import pdb; pdb.Pdb(nosigint=True).set_trace()
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... test_function_2()
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... print('Not reached.')
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>>> with PdbTestInput([ # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
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... 'next', # step over exception-raising call
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... 'bt', # get a backtrace
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... 'list', # list code of test_function()
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... 'down', # step into test_function_2()
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... 'list', # list code of test_function_2()
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... 'continue',
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... ]):
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... try:
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... test_function()
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... except ZeroDivisionError:
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... print('Correctly reraised.')
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> <doctest test.test_pdb.test_post_mortem[1]>(3)test_function()
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-> test_function_2()
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(Pdb) next
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Exception!
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ZeroDivisionError: division by zero
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> <doctest test.test_pdb.test_post_mortem[1]>(3)test_function()
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-> test_function_2()
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(Pdb) bt
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...
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<doctest test.test_pdb.test_post_mortem[2]>(10)<module>()
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-> test_function()
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> <doctest test.test_pdb.test_post_mortem[1]>(3)test_function()
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-> test_function_2()
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<doctest test.test_pdb.test_post_mortem[0]>(3)test_function_2()
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-> 1/0
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(Pdb) list
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1 def test_function():
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2 import pdb; pdb.Pdb(nosigint=True).set_trace()
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3 -> test_function_2()
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4 print('Not reached.')
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[EOF]
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(Pdb) down
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> <doctest test.test_pdb.test_post_mortem[0]>(3)test_function_2()
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-> 1/0
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(Pdb) list
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1 def test_function_2():
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2 try:
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3 >> 1/0
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4 finally:
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5 -> print('Exception!')
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[EOF]
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(Pdb) continue
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Correctly reraised.
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"""
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def test_pdb_skip_modules():
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"""This illustrates the simple case of module skipping.
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>>> def skip_module():
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... import string
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... import pdb; pdb.Pdb(skip=['stri*'], nosigint=True).set_trace()
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... string.capwords('FOO')
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>>> with PdbTestInput([
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... 'step',
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... 'continue',
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... ]):
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... skip_module()
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> <doctest test.test_pdb.test_pdb_skip_modules[0]>(4)skip_module()
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-> string.capwords('FOO')
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(Pdb) step
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--Return--
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> <doctest test.test_pdb.test_pdb_skip_modules[0]>(4)skip_module()->None
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-> string.capwords('FOO')
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(Pdb) continue
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"""
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# Module for testing skipping of module that makes a callback
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mod = imp.new_module('module_to_skip')
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exec('def foo_pony(callback): x = 1; callback(); return None', mod.__dict__)
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def test_pdb_skip_modules_with_callback():
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"""This illustrates skipping of modules that call into other code.
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>>> def skip_module():
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... def callback():
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... return None
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... import pdb; pdb.Pdb(skip=['module_to_skip*'], nosigint=True).set_trace()
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... mod.foo_pony(callback)
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>>> with PdbTestInput([
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... 'step',
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... 'step',
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... 'step',
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... 'step',
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... 'step',
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... 'continue',
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... ]):
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... skip_module()
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... pass # provides something to "step" to
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> <doctest test.test_pdb.test_pdb_skip_modules_with_callback[0]>(5)skip_module()
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-> mod.foo_pony(callback)
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(Pdb) step
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--Call--
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> <doctest test.test_pdb.test_pdb_skip_modules_with_callback[0]>(2)callback()
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-> def callback():
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(Pdb) step
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> <doctest test.test_pdb.test_pdb_skip_modules_with_callback[0]>(3)callback()
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-> return None
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(Pdb) step
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--Return--
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> <doctest test.test_pdb.test_pdb_skip_modules_with_callback[0]>(3)callback()->None
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-> return None
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(Pdb) step
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--Return--
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> <doctest test.test_pdb.test_pdb_skip_modules_with_callback[0]>(5)skip_module()->None
|
|
-> mod.foo_pony(callback)
|
|
(Pdb) step
|
|
> <doctest test.test_pdb.test_pdb_skip_modules_with_callback[1]>(10)<module>()
|
|
-> pass # provides something to "step" to
|
|
(Pdb) continue
|
|
"""
|
|
|
|
|
|
def test_pdb_continue_in_bottomframe():
|
|
"""Test that "continue" and "next" work properly in bottom frame (issue #5294).
|
|
|
|
>>> def test_function():
|
|
... import pdb, sys; inst = pdb.Pdb(nosigint=True)
|
|
... inst.set_trace()
|
|
... inst.botframe = sys._getframe() # hackery to get the right botframe
|
|
... print(1)
|
|
... print(2)
|
|
... print(3)
|
|
... print(4)
|
|
|
|
>>> with PdbTestInput([ # doctest: +ELLIPSIS
|
|
... 'next',
|
|
... 'break 7',
|
|
... 'continue',
|
|
... 'next',
|
|
... 'continue',
|
|
... 'continue',
|
|
... ]):
|
|
... test_function()
|
|
> <doctest test.test_pdb.test_pdb_continue_in_bottomframe[0]>(4)test_function()
|
|
-> inst.botframe = sys._getframe() # hackery to get the right botframe
|
|
(Pdb) next
|
|
> <doctest test.test_pdb.test_pdb_continue_in_bottomframe[0]>(5)test_function()
|
|
-> print(1)
|
|
(Pdb) break 7
|
|
Breakpoint ... at <doctest test.test_pdb.test_pdb_continue_in_bottomframe[0]>:7
|
|
(Pdb) continue
|
|
1
|
|
2
|
|
> <doctest test.test_pdb.test_pdb_continue_in_bottomframe[0]>(7)test_function()
|
|
-> print(3)
|
|
(Pdb) next
|
|
3
|
|
> <doctest test.test_pdb.test_pdb_continue_in_bottomframe[0]>(8)test_function()
|
|
-> print(4)
|
|
(Pdb) continue
|
|
4
|
|
"""
|
|
|
|
|
|
def pdb_invoke(method, arg):
|
|
"""Run pdb.method(arg)."""
|
|
import pdb
|
|
getattr(pdb.Pdb(nosigint=True), method)(arg)
|
|
|
|
|
|
def test_pdb_run_with_incorrect_argument():
|
|
"""Testing run and runeval with incorrect first argument.
|
|
|
|
>>> pti = PdbTestInput(['continue',])
|
|
>>> with pti:
|
|
... pdb_invoke('run', lambda x: x)
|
|
Traceback (most recent call last):
|
|
TypeError: exec() arg 1 must be a string, bytes or code object
|
|
|
|
>>> with pti:
|
|
... pdb_invoke('runeval', lambda x: x)
|
|
Traceback (most recent call last):
|
|
TypeError: eval() arg 1 must be a string, bytes or code object
|
|
"""
|
|
|
|
|
|
def test_pdb_run_with_code_object():
|
|
"""Testing run and runeval with code object as a first argument.
|
|
|
|
>>> with PdbTestInput(['step','x', 'continue']): # doctest: +ELLIPSIS
|
|
... pdb_invoke('run', compile('x=1', '<string>', 'exec'))
|
|
> <string>(1)<module>()...
|
|
(Pdb) step
|
|
--Return--
|
|
> <string>(1)<module>()->None
|
|
(Pdb) x
|
|
1
|
|
(Pdb) continue
|
|
|
|
>>> with PdbTestInput(['x', 'continue']):
|
|
... x=0
|
|
... pdb_invoke('runeval', compile('x+1', '<string>', 'eval'))
|
|
> <string>(1)<module>()->None
|
|
(Pdb) x
|
|
1
|
|
(Pdb) continue
|
|
"""
|
|
|
|
|
|
class PdbTestCase(unittest.TestCase):
|
|
|
|
def run_pdb(self, script, commands):
|
|
"""Run 'script' lines with pdb and the pdb 'commands'."""
|
|
filename = 'main.py'
|
|
with open(filename, 'w') as f:
|
|
f.write(textwrap.dedent(script))
|
|
self.addCleanup(support.unlink, filename)
|
|
cmd = [sys.executable, '-m', 'pdb', filename]
|
|
stdout = stderr = None
|
|
with subprocess.Popen(cmd, stdout=subprocess.PIPE,
|
|
stdin=subprocess.PIPE,
|
|
stderr=subprocess.STDOUT,
|
|
) as proc:
|
|
stdout, stderr = proc.communicate(str.encode(commands))
|
|
stdout = stdout and bytes.decode(stdout)
|
|
stderr = stderr and bytes.decode(stderr)
|
|
return stdout, stderr
|
|
|
|
def test_issue7964(self):
|
|
# open the file as binary so we can force \r\n newline
|
|
with open(support.TESTFN, 'wb') as f:
|
|
f.write(b'print("testing my pdb")\r\n')
|
|
cmd = [sys.executable, '-m', 'pdb', support.TESTFN]
|
|
proc = subprocess.Popen(cmd,
|
|
stdout=subprocess.PIPE,
|
|
stdin=subprocess.PIPE,
|
|
stderr=subprocess.STDOUT,
|
|
)
|
|
self.addCleanup(proc.stdout.close)
|
|
stdout, stderr = proc.communicate(b'quit\n')
|
|
self.assertNotIn(b'SyntaxError', stdout,
|
|
"Got a syntax error running test script under PDB")
|
|
|
|
def test_issue13183(self):
|
|
script = """
|
|
from bar import bar
|
|
|
|
def foo():
|
|
bar()
|
|
|
|
def nope():
|
|
pass
|
|
|
|
def foobar():
|
|
foo()
|
|
nope()
|
|
|
|
foobar()
|
|
"""
|
|
commands = """
|
|
from bar import bar
|
|
break bar
|
|
continue
|
|
step
|
|
step
|
|
quit
|
|
"""
|
|
bar = """
|
|
def bar():
|
|
pass
|
|
"""
|
|
with open('bar.py', 'w') as f:
|
|
f.write(textwrap.dedent(bar))
|
|
self.addCleanup(support.unlink, 'bar.py')
|
|
stdout, stderr = self.run_pdb(script, commands)
|
|
self.assertTrue(
|
|
any('main.py(5)foo()->None' in l for l in stdout.splitlines()),
|
|
'Fail to step into the caller after a return')
|
|
|
|
def test_issue13210(self):
|
|
# invoking "continue" on a non-main thread triggered an exception
|
|
# inside signal.signal
|
|
|
|
# raises SkipTest if python was built without threads
|
|
support.import_module('threading')
|
|
|
|
with open(support.TESTFN, 'wb') as f:
|
|
f.write(textwrap.dedent("""
|
|
import threading
|
|
import pdb
|
|
|
|
def start_pdb():
|
|
pdb.Pdb().set_trace()
|
|
x = 1
|
|
y = 1
|
|
|
|
t = threading.Thread(target=start_pdb)
|
|
t.start()""").encode('ascii'))
|
|
cmd = [sys.executable, '-u', support.TESTFN]
|
|
proc = subprocess.Popen(cmd,
|
|
stdout=subprocess.PIPE,
|
|
stdin=subprocess.PIPE,
|
|
stderr=subprocess.STDOUT,
|
|
)
|
|
self.addCleanup(proc.stdout.close)
|
|
stdout, stderr = proc.communicate(b'cont\n')
|
|
self.assertNotIn('Error', stdout.decode(),
|
|
"Got an error running test script under PDB")
|
|
|
|
def tearDown(self):
|
|
support.unlink(support.TESTFN)
|
|
|
|
|
|
def test_main():
|
|
from test import test_pdb
|
|
support.run_doctest(test_pdb, verbosity=True)
|
|
support.run_unittest(PdbTestCase)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
test_main()
|