111 lines
3.7 KiB
Python
111 lines
3.7 KiB
Python
"""
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interactive debugging with the Python Debugger.
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"""
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import py
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import pdb, sys, linecache
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def pytest_addoption(parser):
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group = parser.getgroup("general")
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group._addoption('--pdb',
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action="store_true", dest="usepdb", default=False,
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help="start the interactive Python debugger on errors.")
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def pytest_configure(config):
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if config.getvalue("usepdb"):
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config.pluginmanager.register(PdbInvoke(), 'pdb')
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class PdbInvoke:
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def pytest_sessionfinish(self, session):
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# don't display failures again at the end
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session.config.option.tbstyle = "no"
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def pytest_runtest_makereport(self, item, call, __multicall__):
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if not call.excinfo or \
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call.excinfo.errisinstance(py.test.skip.Exception):
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return
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rep = __multicall__.execute()
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if "xfail" in rep.keywords:
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return rep
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# we assume that the above execute() suspended capturing
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tw = py.io.TerminalWriter()
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tw.line()
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tw.sep(">", "traceback")
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rep.toterminal(tw)
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tw.sep(">", "entering PDB")
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post_mortem(call.excinfo._excinfo[2])
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return rep
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class Pdb(py.std.pdb.Pdb):
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def do_list(self, arg):
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self.lastcmd = 'list'
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last = None
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if arg:
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try:
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x = eval(arg, {}, {})
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if type(x) == type(()):
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first, last = x
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first = int(first)
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last = int(last)
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if last < first:
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# Assume it's a count
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last = first + last
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else:
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first = max(1, int(x) - 5)
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except:
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print ('*** Error in argument: %s' % repr(arg))
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return
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elif self.lineno is None:
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first = max(1, self.curframe.f_lineno - 5)
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else:
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first = self.lineno + 1
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if last is None:
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last = first + 10
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filename = self.curframe.f_code.co_filename
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breaklist = self.get_file_breaks(filename)
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try:
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for lineno in range(first, last+1):
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# start difference from normal do_line
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line = self._getline(filename, lineno)
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# end difference from normal do_line
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if not line:
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print ('[EOF]')
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break
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else:
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s = repr(lineno).rjust(3)
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if len(s) < 4: s = s + ' '
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if lineno in breaklist: s = s + 'B'
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else: s = s + ' '
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if lineno == self.curframe.f_lineno:
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s = s + '->'
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sys.stdout.write(s + '\t' + line)
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self.lineno = lineno
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except KeyboardInterrupt:
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pass
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do_l = do_list
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def _getline(self, filename, lineno):
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if hasattr(filename, "__source__"):
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try:
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return filename.__source__.lines[lineno - 1] + "\n"
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except IndexError:
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return None
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return linecache.getline(filename, lineno)
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def get_stack(self, f, t):
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# Modified from bdb.py to be able to walk the stack beyond generators,
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# which does not work in the normal pdb :-(
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stack, i = pdb.Pdb.get_stack(self, f, t)
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if f is None:
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i = max(0, len(stack) - 1)
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while i and stack[i][0].f_locals.get("__tracebackhide__", False):
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i-=1
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return stack, i
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def post_mortem(t):
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p = Pdb()
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p.reset()
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p.interaction(None, t)
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def set_trace():
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# again, a copy of the version in pdb.py
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Pdb().set_trace(sys._getframe().f_back)
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