/usr/lib/python2.7/dist-packages/_pytest/debugging.py is in python-pytest 3.3.2-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 | """ interactive debugging with PDB, the Python Debugger. """
from __future__ import absolute_import, division, print_function
import pdb
import sys
def pytest_addoption(parser):
group = parser.getgroup("general")
group._addoption(
'--pdb', dest="usepdb", action="store_true",
help="start the interactive Python debugger on errors.")
group._addoption(
'--pdbcls', dest="usepdb_cls", metavar="modulename:classname",
help="start a custom interactive Python debugger on errors. "
"For example: --pdbcls=IPython.terminal.debugger:TerminalPdb")
def pytest_configure(config):
if config.getvalue("usepdb_cls"):
modname, classname = config.getvalue("usepdb_cls").split(":")
__import__(modname)
pdb_cls = getattr(sys.modules[modname], classname)
else:
pdb_cls = pdb.Pdb
if config.getvalue("usepdb"):
config.pluginmanager.register(PdbInvoke(), 'pdbinvoke')
old = (pdb.set_trace, pytestPDB._pluginmanager)
def fin():
pdb.set_trace, pytestPDB._pluginmanager = old
pytestPDB._config = None
pytestPDB._pdb_cls = pdb.Pdb
pdb.set_trace = pytestPDB.set_trace
pytestPDB._pluginmanager = config.pluginmanager
pytestPDB._config = config
pytestPDB._pdb_cls = pdb_cls
config._cleanup.append(fin)
class pytestPDB:
""" Pseudo PDB that defers to the real pdb. """
_pluginmanager = None
_config = None
_pdb_cls = pdb.Pdb
@classmethod
def set_trace(cls):
""" invoke PDB set_trace debugging, dropping any IO capturing. """
import _pytest.config
frame = sys._getframe().f_back
if cls._pluginmanager is not None:
capman = cls._pluginmanager.getplugin("capturemanager")
if capman:
capman.suspend_global_capture(in_=True)
tw = _pytest.config.create_terminal_writer(cls._config)
tw.line()
tw.sep(">", "PDB set_trace (IO-capturing turned off)")
cls._pluginmanager.hook.pytest_enter_pdb(config=cls._config)
cls._pdb_cls().set_trace(frame)
class PdbInvoke:
def pytest_exception_interact(self, node, call, report):
capman = node.config.pluginmanager.getplugin("capturemanager")
if capman:
out, err = capman.suspend_global_capture(in_=True)
sys.stdout.write(out)
sys.stdout.write(err)
_enter_pdb(node, call.excinfo, report)
def pytest_internalerror(self, excrepr, excinfo):
for line in str(excrepr).split("\n"):
sys.stderr.write("INTERNALERROR> %s\n" % line)
sys.stderr.flush()
tb = _postmortem_traceback(excinfo)
post_mortem(tb)
def _enter_pdb(node, excinfo, rep):
# XXX we re-use the TerminalReporter's terminalwriter
# because this seems to avoid some encoding related troubles
# for not completely clear reasons.
tw = node.config.pluginmanager.getplugin("terminalreporter")._tw
tw.line()
tw.sep(">", "traceback")
rep.toterminal(tw)
tw.sep(">", "entering PDB")
tb = _postmortem_traceback(excinfo)
post_mortem(tb)
rep._pdbshown = True
return rep
def _postmortem_traceback(excinfo):
# A doctest.UnexpectedException is not useful for post_mortem.
# Use the underlying exception instead:
from doctest import UnexpectedException
if isinstance(excinfo.value, UnexpectedException):
return excinfo.value.exc_info[2]
else:
return excinfo._excinfo[2]
def _find_last_non_hidden_frame(stack):
i = max(0, len(stack) - 1)
while i and stack[i][0].f_locals.get("__tracebackhide__", False):
i -= 1
return i
def post_mortem(t):
class Pdb(pytestPDB._pdb_cls):
def get_stack(self, f, t):
stack, i = pdb.Pdb.get_stack(self, f, t)
if f is None:
i = _find_last_non_hidden_frame(stack)
return stack, i
p = Pdb()
p.reset()
p.interaction(None, t)
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