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1229 lines
44 KiB
Python
1229 lines
44 KiB
Python
""" Test the bdb module.
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A test defines a list of tuples that may be seen as paired tuples, each
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pair being defined by 'expect_tuple, set_tuple' as follows:
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([event, [lineno[, co_name[, eargs]]]]), (set_type, [sargs])
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* 'expect_tuple' describes the expected current state of the Bdb instance.
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It may be the empty tuple and no check is done in that case.
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* 'set_tuple' defines the set_*() method to be invoked when the Bdb
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instance reaches this state.
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Example of an 'expect_tuple, set_tuple' pair:
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('line', 2, 'tfunc_main'), ('step', )
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Definitions of the members of the 'expect_tuple':
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event:
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Name of the trace event. The set methods that do not give back
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control to the tracer [1] do not trigger a tracer event and in
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that case the next 'event' may be 'None' by convention, its value
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is not checked.
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[1] Methods that trigger a trace event are set_step(), set_next(),
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set_return(), set_until() and set_continue().
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lineno:
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Line number. Line numbers are relative to the start of the
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function when tracing a function in the test_bdb module (i.e. this
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module).
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co_name:
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Name of the function being currently traced.
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eargs:
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A tuple:
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* On an 'exception' event the tuple holds a class object, the
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current exception must be an instance of this class.
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* On a 'line' event, the tuple holds a dictionary and a list. The
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dictionary maps each breakpoint number that has been hit on this
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line to its hits count. The list holds the list of breakpoint
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number temporaries that are being deleted.
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Definitions of the members of the 'set_tuple':
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set_type:
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The type of the set method to be invoked. This may
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be the type of one of the Bdb set methods: 'step', 'next',
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'until', 'return', 'continue', 'break', 'quit', or the type of one
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of the set methods added by test_bdb.Bdb: 'ignore', 'enable',
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'disable', 'clear', 'up', 'down'.
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sargs:
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The arguments of the set method if any, packed in a tuple.
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"""
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import bdb as _bdb
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import sys
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import os
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import unittest
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import textwrap
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import importlib
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import linecache
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from contextlib import contextmanager
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from itertools import islice, repeat
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from test.support import import_helper
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from test.support import os_helper
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from test.support import patch_list
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class BdbException(Exception): pass
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class BdbError(BdbException): """Error raised by the Bdb instance."""
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class BdbSyntaxError(BdbException): """Syntax error in the test case."""
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class BdbNotExpectedError(BdbException): """Unexpected result."""
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# When 'dry_run' is set to true, expect tuples are ignored and the actual
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# state of the tracer is printed after running each set_*() method of the test
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# case. The full list of breakpoints and their attributes is also printed
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# after each 'line' event where a breakpoint has been hit.
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dry_run = 0
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def reset_Breakpoint():
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_bdb.Breakpoint.clearBreakpoints()
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def info_breakpoints():
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bp_list = [bp for bp in _bdb.Breakpoint.bpbynumber if bp]
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if not bp_list:
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return ''
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header_added = False
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for bp in bp_list:
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if not header_added:
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info = 'BpNum Temp Enb Hits Ignore Where\n'
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header_added = True
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disp = 'yes ' if bp.temporary else 'no '
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enab = 'yes' if bp.enabled else 'no '
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info += ('%-5d %s %s %-4d %-6d at %s:%d' %
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(bp.number, disp, enab, bp.hits, bp.ignore,
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os.path.basename(bp.file), bp.line))
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if bp.cond:
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info += '\n\tstop only if %s' % (bp.cond,)
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info += '\n'
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return info
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class Bdb(_bdb.Bdb):
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"""Extend Bdb to enhance test coverage."""
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def trace_dispatch(self, frame, event, arg):
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self.currentbp = None
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return super().trace_dispatch(frame, event, arg)
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def set_break(self, filename, lineno, temporary=False, cond=None,
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funcname=None):
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if isinstance(funcname, str):
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if filename == __file__:
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globals_ = globals()
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else:
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module = importlib.import_module(filename[:-3])
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globals_ = module.__dict__
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func = eval(funcname, globals_)
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code = func.__code__
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filename = code.co_filename
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lineno = code.co_firstlineno
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funcname = code.co_name
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res = super().set_break(filename, lineno, temporary=temporary,
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cond=cond, funcname=funcname)
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if isinstance(res, str):
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raise BdbError(res)
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return res
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def get_stack(self, f, t):
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self.stack, self.index = super().get_stack(f, t)
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self.frame = self.stack[self.index][0]
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return self.stack, self.index
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def set_ignore(self, bpnum):
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"""Increment the ignore count of Breakpoint number 'bpnum'."""
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bp = self.get_bpbynumber(bpnum)
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bp.ignore += 1
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def set_enable(self, bpnum):
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bp = self.get_bpbynumber(bpnum)
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bp.enabled = True
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def set_disable(self, bpnum):
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bp = self.get_bpbynumber(bpnum)
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bp.enabled = False
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def set_clear(self, fname, lineno):
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err = self.clear_break(fname, lineno)
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if err:
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raise BdbError(err)
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def set_up(self):
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"""Move up in the frame stack."""
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if not self.index:
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raise BdbError('Oldest frame')
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self.index -= 1
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self.frame = self.stack[self.index][0]
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def set_down(self):
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"""Move down in the frame stack."""
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if self.index + 1 == len(self.stack):
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raise BdbError('Newest frame')
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self.index += 1
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self.frame = self.stack[self.index][0]
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class Tracer(Bdb):
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"""A tracer for testing the bdb module."""
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def __init__(self, expect_set, skip=None, dry_run=False, test_case=None):
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super().__init__(skip=skip)
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self.expect_set = expect_set
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self.dry_run = dry_run
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self.header = ('Dry-run results for %s:' % test_case if
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test_case is not None else None)
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self.init_test()
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def init_test(self):
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self.cur_except = None
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self.expect_set_no = 0
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self.breakpoint_hits = None
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self.expected_list = list(islice(self.expect_set, 0, None, 2))
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self.set_list = list(islice(self.expect_set, 1, None, 2))
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def trace_dispatch(self, frame, event, arg):
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# On an 'exception' event, call_exc_trace() in Python/ceval.c discards
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# a BdbException raised by the Tracer instance, so we raise it on the
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# next trace_dispatch() call that occurs unless the set_quit() or
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# set_continue() method has been invoked on the 'exception' event.
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if self.cur_except is not None:
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raise self.cur_except
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if event == 'exception':
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try:
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res = super().trace_dispatch(frame, event, arg)
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return res
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except BdbException as e:
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self.cur_except = e
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return self.trace_dispatch
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else:
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return super().trace_dispatch(frame, event, arg)
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def user_call(self, frame, argument_list):
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# Adopt the same behavior as pdb and, as a side effect, skip also the
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# first 'call' event when the Tracer is started with Tracer.runcall()
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# which may be possibly considered as a bug.
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if not self.stop_here(frame):
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return
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self.process_event('call', frame, argument_list)
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self.next_set_method()
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def user_line(self, frame):
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self.process_event('line', frame)
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if self.dry_run and self.breakpoint_hits:
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info = info_breakpoints().strip('\n')
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# Indent each line.
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for line in info.split('\n'):
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print(' ' + line)
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self.delete_temporaries()
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self.breakpoint_hits = None
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self.next_set_method()
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def user_return(self, frame, return_value):
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self.process_event('return', frame, return_value)
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self.next_set_method()
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def user_exception(self, frame, exc_info):
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self.exc_info = exc_info
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self.process_event('exception', frame)
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self.next_set_method()
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def user_opcode(self, frame):
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self.process_event('opcode', frame)
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self.next_set_method()
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def do_clear(self, arg):
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# The temporary breakpoints are deleted in user_line().
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bp_list = [self.currentbp]
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self.breakpoint_hits = (bp_list, bp_list)
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def delete_temporaries(self):
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if self.breakpoint_hits:
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for n in self.breakpoint_hits[1]:
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self.clear_bpbynumber(n)
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def pop_next(self):
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self.expect_set_no += 1
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try:
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self.expect = self.expected_list.pop(0)
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except IndexError:
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raise BdbNotExpectedError(
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'expect_set list exhausted, cannot pop item %d' %
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self.expect_set_no)
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self.set_tuple = self.set_list.pop(0)
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def process_event(self, event, frame, *args):
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# Call get_stack() to enable walking the stack with set_up() and
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# set_down().
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tb = None
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if event == 'exception':
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tb = self.exc_info[2]
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self.get_stack(frame, tb)
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# A breakpoint has been hit and it is not a temporary.
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if self.currentbp is not None and not self.breakpoint_hits:
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bp_list = [self.currentbp]
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self.breakpoint_hits = (bp_list, [])
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# Pop next event.
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self.event= event
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self.pop_next()
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if self.dry_run:
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self.print_state(self.header)
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return
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# Validate the expected results.
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if self.expect:
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self.check_equal(self.expect[0], event, 'Wrong event type')
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self.check_lno_name()
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if event in ('call', 'return'):
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self.check_expect_max_size(3)
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elif len(self.expect) > 3:
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if event == 'line':
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bps, temporaries = self.expect[3]
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bpnums = sorted(bps.keys())
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if not self.breakpoint_hits:
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self.raise_not_expected(
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'No breakpoints hit at expect_set item %d' %
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self.expect_set_no)
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self.check_equal(bpnums, self.breakpoint_hits[0],
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'Breakpoint numbers do not match')
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self.check_equal([bps[n] for n in bpnums],
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[self.get_bpbynumber(n).hits for
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n in self.breakpoint_hits[0]],
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'Wrong breakpoint hit count')
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self.check_equal(sorted(temporaries), self.breakpoint_hits[1],
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'Wrong temporary breakpoints')
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elif event == 'exception':
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if not isinstance(self.exc_info[1], self.expect[3]):
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self.raise_not_expected(
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"Wrong exception at expect_set item %d, got '%s'" %
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(self.expect_set_no, self.exc_info))
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def check_equal(self, expected, result, msg):
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if expected == result:
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return
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self.raise_not_expected("%s at expect_set item %d, got '%s'" %
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(msg, self.expect_set_no, result))
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def check_lno_name(self):
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"""Check the line number and function co_name."""
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s = len(self.expect)
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if s > 1:
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lineno = self.lno_abs2rel()
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self.check_equal(self.expect[1], lineno, 'Wrong line number')
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if s > 2:
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self.check_equal(self.expect[2], self.frame.f_code.co_name,
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'Wrong function name')
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def check_expect_max_size(self, size):
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if len(self.expect) > size:
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raise BdbSyntaxError('Invalid size of the %s expect tuple: %s' %
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(self.event, self.expect))
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def lno_abs2rel(self):
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fname = self.canonic(self.frame.f_code.co_filename)
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lineno = self.frame.f_lineno
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return ((lineno - self.frame.f_code.co_firstlineno + 1)
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if fname == self.canonic(__file__) else lineno)
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def lno_rel2abs(self, fname, lineno):
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return (self.frame.f_code.co_firstlineno + lineno - 1
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if (lineno and self.canonic(fname) == self.canonic(__file__))
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else lineno)
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def get_state(self):
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lineno = self.lno_abs2rel()
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co_name = self.frame.f_code.co_name
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state = "('%s', %d, '%s'" % (self.event, lineno, co_name)
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if self.breakpoint_hits:
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bps = '{'
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for n in self.breakpoint_hits[0]:
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if bps != '{':
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bps += ', '
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bps += '%s: %s' % (n, self.get_bpbynumber(n).hits)
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bps += '}'
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bps = '(' + bps + ', ' + str(self.breakpoint_hits[1]) + ')'
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state += ', ' + bps
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elif self.event == 'exception':
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state += ', ' + self.exc_info[0].__name__
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state += '), '
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return state.ljust(32) + str(self.set_tuple) + ','
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def print_state(self, header=None):
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if header is not None and self.expect_set_no == 1:
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print()
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print(header)
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print('%d: %s' % (self.expect_set_no, self.get_state()))
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def raise_not_expected(self, msg):
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msg += '\n'
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msg += ' Expected: %s\n' % str(self.expect)
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msg += ' Got: ' + self.get_state()
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raise BdbNotExpectedError(msg)
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def next_set_method(self):
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set_type = self.set_tuple[0]
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args = self.set_tuple[1] if len(self.set_tuple) == 2 else None
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set_method = getattr(self, 'set_' + set_type)
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# The following set methods give back control to the tracer.
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if set_type in ('step', 'stepinstr', 'continue', 'quit'):
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set_method()
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return
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elif set_type in ('next', 'return'):
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set_method(self.frame)
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return
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elif set_type == 'until':
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lineno = None
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if args:
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lineno = self.lno_rel2abs(self.frame.f_code.co_filename,
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args[0])
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set_method(self.frame, lineno)
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return
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# The following set methods do not give back control to the tracer and
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# next_set_method() is called recursively.
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if (args and set_type in ('break', 'clear', 'ignore', 'enable',
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'disable')) or set_type in ('up', 'down'):
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if set_type in ('break', 'clear'):
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fname, lineno, *remain = args
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lineno = self.lno_rel2abs(fname, lineno)
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args = [fname, lineno]
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args.extend(remain)
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set_method(*args)
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elif set_type in ('ignore', 'enable', 'disable'):
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set_method(*args)
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elif set_type in ('up', 'down'):
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set_method()
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# Process the next expect_set item.
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# It is not expected that a test may reach the recursion limit.
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self.event= None
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self.pop_next()
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if self.dry_run:
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self.print_state()
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else:
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if self.expect:
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self.check_lno_name()
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self.check_expect_max_size(3)
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self.next_set_method()
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else:
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raise BdbSyntaxError('"%s" is an invalid set_tuple' %
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self.set_tuple)
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class TracerRun():
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"""Provide a context for running a Tracer instance with a test case."""
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def __init__(self, test_case, skip=None):
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self.test_case = test_case
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self.dry_run = test_case.dry_run
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self.tracer = Tracer(test_case.expect_set, skip=skip,
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dry_run=self.dry_run, test_case=test_case.id())
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self._original_tracer = None
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def __enter__(self):
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# test_pdb does not reset Breakpoint class attributes on exit :-(
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reset_Breakpoint()
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self._original_tracer = sys.gettrace()
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return self.tracer
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def __exit__(self, type_=None, value=None, traceback=None):
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reset_Breakpoint()
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sys.settrace(self._original_tracer)
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not_empty = ''
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if self.tracer.set_list:
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not_empty += 'All paired tuples have not been processed, '
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not_empty += ('the last one was number %d\n' %
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self.tracer.expect_set_no)
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not_empty += repr(self.tracer.set_list)
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# Make a BdbNotExpectedError a unittest failure.
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if type_ is not None and issubclass(BdbNotExpectedError, type_):
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if isinstance(value, BaseException) and value.args:
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err_msg = value.args[0]
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if not_empty:
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err_msg += '\n' + not_empty
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if self.dry_run:
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print(err_msg)
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return True
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else:
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self.test_case.fail(err_msg)
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else:
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assert False, 'BdbNotExpectedError with empty args'
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if not_empty:
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if self.dry_run:
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print(not_empty)
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else:
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self.test_case.fail(not_empty)
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def run_test(modules, set_list, skip=None):
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"""Run a test and print the dry-run results.
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'modules': A dictionary mapping module names to their source code as a
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string. The dictionary MUST include one module named
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'test_module' with a main() function.
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'set_list': A list of set_type tuples to be run on the module.
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For example, running the following script outputs the following results:
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***************************** SCRIPT ********************************
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from test.test_bdb import run_test, break_in_func
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code = '''
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def func():
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lno = 3
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def main():
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func()
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lno = 7
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'''
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set_list = [
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break_in_func('func', 'test_module.py'),
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('continue', ),
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('step', ),
|
|
('step', ),
|
|
('step', ),
|
|
('quit', ),
|
|
]
|
|
|
|
modules = { 'test_module': code }
|
|
run_test(modules, set_list)
|
|
|
|
**************************** results ********************************
|
|
|
|
1: ('line', 2, 'tfunc_import'), ('next',),
|
|
2: ('line', 3, 'tfunc_import'), ('step',),
|
|
3: ('call', 5, 'main'), ('break', ('test_module.py', None, False, None, 'func')),
|
|
4: ('None', 5, 'main'), ('continue',),
|
|
5: ('line', 3, 'func', ({1: 1}, [])), ('step',),
|
|
BpNum Temp Enb Hits Ignore Where
|
|
1 no yes 1 0 at test_module.py:2
|
|
6: ('return', 3, 'func'), ('step',),
|
|
7: ('line', 7, 'main'), ('step',),
|
|
8: ('return', 7, 'main'), ('quit',),
|
|
|
|
*************************************************************************
|
|
|
|
"""
|
|
def gen(a, b):
|
|
try:
|
|
while 1:
|
|
x = next(a)
|
|
y = next(b)
|
|
yield x
|
|
yield y
|
|
except StopIteration:
|
|
return
|
|
|
|
# Step over the import statement in tfunc_import using 'next' and step
|
|
# into main() in test_module.
|
|
sl = [('next', ), ('step', )]
|
|
sl.extend(set_list)
|
|
|
|
test = BaseTestCase()
|
|
test.dry_run = True
|
|
test.id = lambda : None
|
|
test.expect_set = list(gen(repeat(()), iter(sl)))
|
|
with create_modules(modules):
|
|
with TracerRun(test, skip=skip) as tracer:
|
|
tracer.runcall(tfunc_import)
|
|
|
|
@contextmanager
|
|
def create_modules(modules):
|
|
with os_helper.temp_cwd():
|
|
sys.path.append(os.getcwd())
|
|
try:
|
|
for m in modules:
|
|
fname = m + '.py'
|
|
with open(fname, 'w', encoding="utf-8") as f:
|
|
f.write(textwrap.dedent(modules[m]))
|
|
linecache.checkcache(fname)
|
|
importlib.invalidate_caches()
|
|
yield
|
|
finally:
|
|
for m in modules:
|
|
import_helper.forget(m)
|
|
sys.path.pop()
|
|
|
|
def break_in_func(funcname, fname=__file__, temporary=False, cond=None):
|
|
return 'break', (fname, None, temporary, cond, funcname)
|
|
|
|
TEST_MODULE = 'test_module_for_bdb'
|
|
TEST_MODULE_FNAME = TEST_MODULE + '.py'
|
|
def tfunc_import():
|
|
import test_module_for_bdb
|
|
test_module_for_bdb.main()
|
|
|
|
def tfunc_main():
|
|
lno = 2
|
|
tfunc_first()
|
|
tfunc_second()
|
|
lno = 5
|
|
lno = 6
|
|
lno = 7
|
|
|
|
def tfunc_first():
|
|
lno = 2
|
|
lno = 3
|
|
lno = 4
|
|
|
|
def tfunc_second():
|
|
lno = 2
|
|
|
|
class BaseTestCase(unittest.TestCase):
|
|
"""Base class for all tests."""
|
|
|
|
dry_run = dry_run
|
|
|
|
def fail(self, msg=None):
|
|
# Override fail() to use 'raise from None' to avoid repetition of the
|
|
# error message and traceback.
|
|
raise self.failureException(msg) from None
|
|
|
|
class StateTestCase(BaseTestCase):
|
|
"""Test the step, next, return, until and quit 'set_' methods."""
|
|
|
|
def test_step(self):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_main'), ('step', ),
|
|
('line', 3, 'tfunc_main'), ('step', ),
|
|
('call', 1, 'tfunc_first'), ('step', ),
|
|
('line', 2, 'tfunc_first'), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_main)
|
|
|
|
def test_step_next_on_last_statement(self):
|
|
for set_type in ('step', 'next'):
|
|
with self.subTest(set_type=set_type):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_main'), ('step', ),
|
|
('line', 3, 'tfunc_main'), ('step', ),
|
|
('call', 1, 'tfunc_first'), ('break', (__file__, 3)),
|
|
('None', 1, 'tfunc_first'), ('continue', ),
|
|
('line', 3, 'tfunc_first', ({1:1}, [])), (set_type, ),
|
|
('line', 4, 'tfunc_first'), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_main)
|
|
|
|
def test_stepinstr(self):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_main'), ('stepinstr', ),
|
|
('opcode', 2, 'tfunc_main'), ('next', ),
|
|
('line', 3, 'tfunc_main'), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_main)
|
|
|
|
def test_next(self):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_main'), ('step', ),
|
|
('line', 3, 'tfunc_main'), ('next', ),
|
|
('line', 4, 'tfunc_main'), ('step', ),
|
|
('call', 1, 'tfunc_second'), ('step', ),
|
|
('line', 2, 'tfunc_second'), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_main)
|
|
|
|
def test_next_over_import(self):
|
|
code = """
|
|
def main():
|
|
lno = 3
|
|
"""
|
|
modules = { TEST_MODULE: code }
|
|
with create_modules(modules):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_import'), ('next', ),
|
|
('line', 3, 'tfunc_import'), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_import)
|
|
|
|
def test_next_on_plain_statement(self):
|
|
# Check that set_next() is equivalent to set_step() on a plain
|
|
# statement.
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_main'), ('step', ),
|
|
('line', 3, 'tfunc_main'), ('step', ),
|
|
('call', 1, 'tfunc_first'), ('next', ),
|
|
('line', 2, 'tfunc_first'), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_main)
|
|
|
|
def test_next_in_caller_frame(self):
|
|
# Check that set_next() in the caller frame causes the tracer
|
|
# to stop next in the caller frame.
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_main'), ('step', ),
|
|
('line', 3, 'tfunc_main'), ('step', ),
|
|
('call', 1, 'tfunc_first'), ('up', ),
|
|
('None', 3, 'tfunc_main'), ('next', ),
|
|
('line', 4, 'tfunc_main'), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_main)
|
|
|
|
def test_return(self):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_main'), ('step', ),
|
|
('line', 3, 'tfunc_main'), ('step', ),
|
|
('call', 1, 'tfunc_first'), ('step', ),
|
|
('line', 2, 'tfunc_first'), ('return', ),
|
|
('return', 4, 'tfunc_first'), ('step', ),
|
|
('line', 4, 'tfunc_main'), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_main)
|
|
|
|
def test_return_in_caller_frame(self):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_main'), ('step', ),
|
|
('line', 3, 'tfunc_main'), ('step', ),
|
|
('call', 1, 'tfunc_first'), ('up', ),
|
|
('None', 3, 'tfunc_main'), ('return', ),
|
|
('return', 7, 'tfunc_main'), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_main)
|
|
|
|
def test_until(self):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_main'), ('step', ),
|
|
('line', 3, 'tfunc_main'), ('step', ),
|
|
('call', 1, 'tfunc_first'), ('step', ),
|
|
('line', 2, 'tfunc_first'), ('until', (4, )),
|
|
('line', 4, 'tfunc_first'), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_main)
|
|
|
|
def test_until_with_too_large_count(self):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_main'), break_in_func('tfunc_first'),
|
|
('None', 2, 'tfunc_main'), ('continue', ),
|
|
('line', 2, 'tfunc_first', ({1:1}, [])), ('until', (9999, )),
|
|
('return', 4, 'tfunc_first'), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_main)
|
|
|
|
def test_until_in_caller_frame(self):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_main'), ('step', ),
|
|
('line', 3, 'tfunc_main'), ('step', ),
|
|
('call', 1, 'tfunc_first'), ('up', ),
|
|
('None', 3, 'tfunc_main'), ('until', (6, )),
|
|
('line', 6, 'tfunc_main'), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_main)
|
|
|
|
@patch_list(sys.meta_path)
|
|
def test_skip(self):
|
|
# Check that tracing is skipped over the import statement in
|
|
# 'tfunc_import()'.
|
|
|
|
# Remove all but the standard importers.
|
|
sys.meta_path[:] = (
|
|
item
|
|
for item in sys.meta_path
|
|
if item.__module__.startswith('_frozen_importlib')
|
|
)
|
|
|
|
code = """
|
|
def main():
|
|
lno = 3
|
|
"""
|
|
modules = { TEST_MODULE: code }
|
|
with create_modules(modules):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_import'), ('step', ),
|
|
('line', 3, 'tfunc_import'), ('quit', ),
|
|
]
|
|
skip = ('importlib*', 'zipimport', 'encodings.*', TEST_MODULE)
|
|
with TracerRun(self, skip=skip) as tracer:
|
|
tracer.runcall(tfunc_import)
|
|
|
|
def test_skip_with_no_name_module(self):
|
|
# some frames have `globals` with no `__name__`
|
|
# for instance the second frame in this traceback
|
|
# exec(compile('raise ValueError()', '', 'exec'), {})
|
|
bdb = Bdb(skip=['anything*'])
|
|
self.assertIs(bdb.is_skipped_module(None), False)
|
|
|
|
def test_down(self):
|
|
# Check that set_down() raises BdbError at the newest frame.
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_main'), ('down', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
self.assertRaises(BdbError, tracer.runcall, tfunc_main)
|
|
|
|
def test_up(self):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_main'), ('step', ),
|
|
('line', 3, 'tfunc_main'), ('step', ),
|
|
('call', 1, 'tfunc_first'), ('up', ),
|
|
('None', 3, 'tfunc_main'), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_main)
|
|
|
|
class BreakpointTestCase(BaseTestCase):
|
|
"""Test the breakpoint set method."""
|
|
|
|
def test_bp_on_non_existent_module(self):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_import'), ('break', ('/non/existent/module.py', 1))
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
self.assertRaises(BdbError, tracer.runcall, tfunc_import)
|
|
|
|
def test_bp_after_last_statement(self):
|
|
code = """
|
|
def main():
|
|
lno = 3
|
|
"""
|
|
modules = { TEST_MODULE: code }
|
|
with create_modules(modules):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_import'), ('break', (TEST_MODULE_FNAME, 4))
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
self.assertRaises(BdbError, tracer.runcall, tfunc_import)
|
|
|
|
def test_temporary_bp(self):
|
|
code = """
|
|
def func():
|
|
lno = 3
|
|
|
|
def main():
|
|
for i in range(2):
|
|
func()
|
|
"""
|
|
modules = { TEST_MODULE: code }
|
|
with create_modules(modules):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_import'),
|
|
break_in_func('func', TEST_MODULE_FNAME, True),
|
|
('None', 2, 'tfunc_import'),
|
|
break_in_func('func', TEST_MODULE_FNAME, True),
|
|
('None', 2, 'tfunc_import'), ('continue', ),
|
|
('line', 3, 'func', ({1:1}, [1])), ('continue', ),
|
|
('line', 3, 'func', ({2:1}, [2])), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_import)
|
|
|
|
def test_disabled_temporary_bp(self):
|
|
code = """
|
|
def func():
|
|
lno = 3
|
|
|
|
def main():
|
|
for i in range(3):
|
|
func()
|
|
"""
|
|
modules = { TEST_MODULE: code }
|
|
with create_modules(modules):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_import'),
|
|
break_in_func('func', TEST_MODULE_FNAME),
|
|
('None', 2, 'tfunc_import'),
|
|
break_in_func('func', TEST_MODULE_FNAME, True),
|
|
('None', 2, 'tfunc_import'), ('disable', (2, )),
|
|
('None', 2, 'tfunc_import'), ('continue', ),
|
|
('line', 3, 'func', ({1:1}, [])), ('enable', (2, )),
|
|
('None', 3, 'func'), ('disable', (1, )),
|
|
('None', 3, 'func'), ('continue', ),
|
|
('line', 3, 'func', ({2:1}, [2])), ('enable', (1, )),
|
|
('None', 3, 'func'), ('continue', ),
|
|
('line', 3, 'func', ({1:2}, [])), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_import)
|
|
|
|
def test_bp_condition(self):
|
|
code = """
|
|
def func(a):
|
|
lno = 3
|
|
|
|
def main():
|
|
for i in range(3):
|
|
func(i)
|
|
"""
|
|
modules = { TEST_MODULE: code }
|
|
with create_modules(modules):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_import'),
|
|
break_in_func('func', TEST_MODULE_FNAME, False, 'a == 2'),
|
|
('None', 2, 'tfunc_import'), ('continue', ),
|
|
('line', 3, 'func', ({1:3}, [])), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_import)
|
|
|
|
def test_bp_exception_on_condition_evaluation(self):
|
|
code = """
|
|
def func(a):
|
|
lno = 3
|
|
|
|
def main():
|
|
func(0)
|
|
"""
|
|
modules = { TEST_MODULE: code }
|
|
with create_modules(modules):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_import'),
|
|
break_in_func('func', TEST_MODULE_FNAME, False, '1 / 0'),
|
|
('None', 2, 'tfunc_import'), ('continue', ),
|
|
('line', 3, 'func', ({1:1}, [])), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_import)
|
|
|
|
def test_bp_ignore_count(self):
|
|
code = """
|
|
def func():
|
|
lno = 3
|
|
|
|
def main():
|
|
for i in range(2):
|
|
func()
|
|
"""
|
|
modules = { TEST_MODULE: code }
|
|
with create_modules(modules):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_import'),
|
|
break_in_func('func', TEST_MODULE_FNAME),
|
|
('None', 2, 'tfunc_import'), ('ignore', (1, )),
|
|
('None', 2, 'tfunc_import'), ('continue', ),
|
|
('line', 3, 'func', ({1:2}, [])), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_import)
|
|
|
|
def test_ignore_count_on_disabled_bp(self):
|
|
code = """
|
|
def func():
|
|
lno = 3
|
|
|
|
def main():
|
|
for i in range(3):
|
|
func()
|
|
"""
|
|
modules = { TEST_MODULE: code }
|
|
with create_modules(modules):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_import'),
|
|
break_in_func('func', TEST_MODULE_FNAME),
|
|
('None', 2, 'tfunc_import'),
|
|
break_in_func('func', TEST_MODULE_FNAME),
|
|
('None', 2, 'tfunc_import'), ('ignore', (1, )),
|
|
('None', 2, 'tfunc_import'), ('disable', (1, )),
|
|
('None', 2, 'tfunc_import'), ('continue', ),
|
|
('line', 3, 'func', ({2:1}, [])), ('enable', (1, )),
|
|
('None', 3, 'func'), ('continue', ),
|
|
('line', 3, 'func', ({2:2}, [])), ('continue', ),
|
|
('line', 3, 'func', ({1:2}, [])), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_import)
|
|
|
|
def test_clear_two_bp_on_same_line(self):
|
|
code = """
|
|
def func():
|
|
lno = 3
|
|
lno = 4
|
|
|
|
def main():
|
|
for i in range(3):
|
|
func()
|
|
"""
|
|
modules = { TEST_MODULE: code }
|
|
with create_modules(modules):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_import'), ('break', (TEST_MODULE_FNAME, 3)),
|
|
('None', 2, 'tfunc_import'), ('break', (TEST_MODULE_FNAME, 3)),
|
|
('None', 2, 'tfunc_import'), ('break', (TEST_MODULE_FNAME, 4)),
|
|
('None', 2, 'tfunc_import'), ('continue', ),
|
|
('line', 3, 'func', ({1:1}, [])), ('continue', ),
|
|
('line', 4, 'func', ({3:1}, [])), ('clear', (TEST_MODULE_FNAME, 3)),
|
|
('None', 4, 'func'), ('continue', ),
|
|
('line', 4, 'func', ({3:2}, [])), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_import)
|
|
|
|
def test_clear_at_no_bp(self):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_import'), ('clear', (__file__, 1))
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
self.assertRaises(BdbError, tracer.runcall, tfunc_import)
|
|
|
|
def test_load_bps_from_previous_Bdb_instance(self):
|
|
reset_Breakpoint()
|
|
db1 = Bdb()
|
|
fname = db1.canonic(__file__)
|
|
db1.set_break(__file__, 1)
|
|
self.assertEqual(db1.get_all_breaks(), {fname: [1]})
|
|
|
|
db2 = Bdb()
|
|
db2.set_break(__file__, 2)
|
|
db2.set_break(__file__, 3)
|
|
db2.set_break(__file__, 4)
|
|
self.assertEqual(db1.get_all_breaks(), {fname: [1]})
|
|
self.assertEqual(db2.get_all_breaks(), {fname: [1, 2, 3, 4]})
|
|
db2.clear_break(__file__, 1)
|
|
self.assertEqual(db1.get_all_breaks(), {fname: [1]})
|
|
self.assertEqual(db2.get_all_breaks(), {fname: [2, 3, 4]})
|
|
|
|
db3 = Bdb()
|
|
self.assertEqual(db1.get_all_breaks(), {fname: [1]})
|
|
self.assertEqual(db2.get_all_breaks(), {fname: [2, 3, 4]})
|
|
self.assertEqual(db3.get_all_breaks(), {fname: [2, 3, 4]})
|
|
db2.clear_break(__file__, 2)
|
|
self.assertEqual(db1.get_all_breaks(), {fname: [1]})
|
|
self.assertEqual(db2.get_all_breaks(), {fname: [3, 4]})
|
|
self.assertEqual(db3.get_all_breaks(), {fname: [2, 3, 4]})
|
|
|
|
db4 = Bdb()
|
|
db4.set_break(__file__, 5)
|
|
self.assertEqual(db1.get_all_breaks(), {fname: [1]})
|
|
self.assertEqual(db2.get_all_breaks(), {fname: [3, 4]})
|
|
self.assertEqual(db3.get_all_breaks(), {fname: [2, 3, 4]})
|
|
self.assertEqual(db4.get_all_breaks(), {fname: [3, 4, 5]})
|
|
reset_Breakpoint()
|
|
|
|
db5 = Bdb()
|
|
db5.set_break(__file__, 6)
|
|
self.assertEqual(db1.get_all_breaks(), {fname: [1]})
|
|
self.assertEqual(db2.get_all_breaks(), {fname: [3, 4]})
|
|
self.assertEqual(db3.get_all_breaks(), {fname: [2, 3, 4]})
|
|
self.assertEqual(db4.get_all_breaks(), {fname: [3, 4, 5]})
|
|
self.assertEqual(db5.get_all_breaks(), {fname: [6]})
|
|
|
|
|
|
class RunTestCase(BaseTestCase):
|
|
"""Test run, runeval and set_trace."""
|
|
|
|
def test_run_step(self):
|
|
# Check that the bdb 'run' method stops at the first line event.
|
|
code = """
|
|
lno = 2
|
|
"""
|
|
self.expect_set = [
|
|
('line', 2, '<module>'), ('step', ),
|
|
('return', 2, '<module>'), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.run(compile(textwrap.dedent(code), '<string>', 'exec'))
|
|
|
|
def test_runeval_step(self):
|
|
# Test bdb 'runeval'.
|
|
code = """
|
|
def main():
|
|
lno = 3
|
|
"""
|
|
modules = { TEST_MODULE: code }
|
|
with create_modules(modules):
|
|
self.expect_set = [
|
|
('line', 1, '<module>'), ('step', ),
|
|
('call', 2, 'main'), ('step', ),
|
|
('line', 3, 'main'), ('step', ),
|
|
('return', 3, 'main'), ('step', ),
|
|
('return', 1, '<module>'), ('quit', ),
|
|
]
|
|
import test_module_for_bdb
|
|
ns = {'test_module_for_bdb': test_module_for_bdb}
|
|
with TracerRun(self) as tracer:
|
|
tracer.runeval('test_module_for_bdb.main()', ns, ns)
|
|
|
|
class IssuesTestCase(BaseTestCase):
|
|
"""Test fixed bdb issues."""
|
|
|
|
def test_step_at_return_with_no_trace_in_caller(self):
|
|
# Issue #13183.
|
|
# Check that the tracer does step into the caller frame when the
|
|
# trace function is not set in that frame.
|
|
code_1 = """
|
|
from test_module_for_bdb_2 import func
|
|
def main():
|
|
func()
|
|
lno = 5
|
|
"""
|
|
code_2 = """
|
|
def func():
|
|
lno = 3
|
|
"""
|
|
modules = {
|
|
TEST_MODULE: code_1,
|
|
'test_module_for_bdb_2': code_2,
|
|
}
|
|
with create_modules(modules):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_import'),
|
|
break_in_func('func', 'test_module_for_bdb_2.py'),
|
|
('None', 2, 'tfunc_import'), ('continue', ),
|
|
('line', 3, 'func', ({1:1}, [])), ('step', ),
|
|
('return', 3, 'func'), ('step', ),
|
|
('line', 5, 'main'), ('quit', ),
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_import)
|
|
|
|
def test_next_until_return_in_generator(self):
|
|
# Issue #16596.
|
|
# Check that set_next(), set_until() and set_return() do not treat the
|
|
# `yield` and `yield from` statements as if they were returns and stop
|
|
# instead in the current frame.
|
|
code = """
|
|
def test_gen():
|
|
yield 0
|
|
lno = 4
|
|
return 123
|
|
|
|
def main():
|
|
it = test_gen()
|
|
next(it)
|
|
next(it)
|
|
lno = 11
|
|
"""
|
|
modules = { TEST_MODULE: code }
|
|
for set_type in ('next', 'until', 'return'):
|
|
with self.subTest(set_type=set_type):
|
|
with create_modules(modules):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_import'),
|
|
break_in_func('test_gen', TEST_MODULE_FNAME),
|
|
('None', 2, 'tfunc_import'), ('continue', ),
|
|
('line', 3, 'test_gen', ({1:1}, [])), (set_type, ),
|
|
]
|
|
|
|
if set_type == 'return':
|
|
self.expect_set.extend(
|
|
[('exception', 10, 'main', StopIteration), ('step',),
|
|
('return', 10, 'main'), ('quit', ),
|
|
]
|
|
)
|
|
else:
|
|
self.expect_set.extend(
|
|
[('line', 4, 'test_gen'), ('quit', ),]
|
|
)
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_import)
|
|
|
|
def test_next_command_in_generator_for_loop(self):
|
|
# Issue #16596.
|
|
code = """
|
|
def test_gen():
|
|
yield 0
|
|
lno = 4
|
|
yield 1
|
|
return 123
|
|
|
|
def main():
|
|
for i in test_gen():
|
|
lno = 10
|
|
lno = 11
|
|
"""
|
|
modules = { TEST_MODULE: code }
|
|
with create_modules(modules):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_import'),
|
|
break_in_func('test_gen', TEST_MODULE_FNAME),
|
|
('None', 2, 'tfunc_import'), ('continue', ),
|
|
('line', 3, 'test_gen', ({1:1}, [])), ('next', ),
|
|
('line', 4, 'test_gen'), ('next', ),
|
|
('line', 5, 'test_gen'), ('next', ),
|
|
('line', 6, 'test_gen'), ('next', ),
|
|
('exception', 9, 'main', StopIteration), ('step', ),
|
|
('line', 11, 'main'), ('quit', ),
|
|
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_import)
|
|
|
|
def test_next_command_in_generator_with_subiterator(self):
|
|
# Issue #16596.
|
|
code = """
|
|
def test_subgen():
|
|
yield 0
|
|
return 123
|
|
|
|
def test_gen():
|
|
x = yield from test_subgen()
|
|
return 456
|
|
|
|
def main():
|
|
for i in test_gen():
|
|
lno = 12
|
|
lno = 13
|
|
"""
|
|
modules = { TEST_MODULE: code }
|
|
with create_modules(modules):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_import'),
|
|
break_in_func('test_gen', TEST_MODULE_FNAME),
|
|
('None', 2, 'tfunc_import'), ('continue', ),
|
|
('line', 7, 'test_gen', ({1:1}, [])), ('next', ),
|
|
('line', 8, 'test_gen'), ('next', ),
|
|
('exception', 11, 'main', StopIteration), ('step', ),
|
|
('line', 13, 'main'), ('quit', ),
|
|
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_import)
|
|
|
|
def test_return_command_in_generator_with_subiterator(self):
|
|
# Issue #16596.
|
|
code = """
|
|
def test_subgen():
|
|
yield 0
|
|
return 123
|
|
|
|
def test_gen():
|
|
x = yield from test_subgen()
|
|
return 456
|
|
|
|
def main():
|
|
for i in test_gen():
|
|
lno = 12
|
|
lno = 13
|
|
"""
|
|
modules = { TEST_MODULE: code }
|
|
with create_modules(modules):
|
|
self.expect_set = [
|
|
('line', 2, 'tfunc_import'),
|
|
break_in_func('test_subgen', TEST_MODULE_FNAME),
|
|
('None', 2, 'tfunc_import'), ('continue', ),
|
|
('line', 3, 'test_subgen', ({1:1}, [])), ('return', ),
|
|
('exception', 7, 'test_gen', StopIteration), ('return', ),
|
|
('exception', 11, 'main', StopIteration), ('step', ),
|
|
('line', 13, 'main'), ('quit', ),
|
|
|
|
]
|
|
with TracerRun(self) as tracer:
|
|
tracer.runcall(tfunc_import)
|
|
|
|
|
|
class TestRegressions(unittest.TestCase):
|
|
def test_format_stack_entry_no_lineno(self):
|
|
# See gh-101517
|
|
self.assertIn('Warning: lineno is None',
|
|
Bdb().format_stack_entry((sys._getframe(), None)))
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|