| """ Test the bdb module. |
| |
| A test defines a list of tuples that may be seen as paired tuples, each |
| pair being defined by 'expect_tuple, set_tuple' as follows: |
| |
| ([event, [lineno[, co_name[, eargs]]]]), (set_type, [sargs]) |
| |
| * 'expect_tuple' describes the expected current state of the Bdb instance. |
| It may be the empty tuple and no check is done in that case. |
| * 'set_tuple' defines the set_*() method to be invoked when the Bdb |
| instance reaches this state. |
| |
| Example of an 'expect_tuple, set_tuple' pair: |
| |
| ('line', 2, 'tfunc_main'), ('step', ) |
| |
| Definitions of the members of the 'expect_tuple': |
| event: |
| Name of the trace event. The set methods that do not give back |
| control to the tracer [1] do not trigger a tracer event and in |
| that case the next 'event' may be 'None' by convention, its value |
| is not checked. |
| [1] Methods that trigger a trace event are set_step(), set_next(), |
| set_return(), set_until() and set_continue(). |
| lineno: |
| Line number. Line numbers are relative to the start of the |
| function when tracing a function in the test_bdb module (i.e. this |
| module). |
| co_name: |
| Name of the function being currently traced. |
| eargs: |
| A tuple: |
| * On an 'exception' event the tuple holds a class object, the |
| current exception must be an instance of this class. |
| * On a 'line' event, the tuple holds a dictionary and a list. The |
| dictionary maps each breakpoint number that has been hit on this |
| line to its hits count. The list holds the list of breakpoint |
| number temporaries that are being deleted. |
| |
| Definitions of the members of the 'set_tuple': |
| set_type: |
| The type of the set method to be invoked. This may |
| be the type of one of the Bdb set methods: 'step', 'next', |
| 'until', 'return', 'continue', 'break', 'quit', or the type of one |
| of the set methods added by test_bdb.Bdb: 'ignore', 'enable', |
| 'disable', 'clear', 'up', 'down'. |
| sargs: |
| The arguments of the set method if any, packed in a tuple. |
| """ |
| |
| import bdb as _bdb |
| import sys |
| import os |
| import unittest |
| import textwrap |
| import importlib |
| import linecache |
| from contextlib import contextmanager |
| from itertools import islice, repeat |
| import test.support |
| |
| class BdbException(Exception): pass |
| class BdbError(BdbException): """Error raised by the Bdb instance.""" |
| class BdbSyntaxError(BdbException): """Syntax error in the test case.""" |
| class BdbNotExpectedError(BdbException): """Unexpected result.""" |
| |
| # When 'dry_run' is set to true, expect tuples are ignored and the actual |
| # state of the tracer is printed after running each set_*() method of the test |
| # case. The full list of breakpoints and their attributes is also printed |
| # after each 'line' event where a breakpoint has been hit. |
| dry_run = 0 |
| |
| def reset_Breakpoint(): |
| _bdb.Breakpoint.next = 1 |
| _bdb.Breakpoint.bplist = {} |
| _bdb.Breakpoint.bpbynumber = [None] |
| |
| def info_breakpoints(): |
| bp_list = [bp for bp in _bdb.Breakpoint.bpbynumber if bp] |
| if not bp_list: |
| return '' |
| |
| header_added = False |
| for bp in bp_list: |
| if not header_added: |
| info = 'BpNum Temp Enb Hits Ignore Where\n' |
| header_added = True |
| |
| disp = 'yes ' if bp.temporary else 'no ' |
| enab = 'yes' if bp.enabled else 'no ' |
| info += ('%-5d %s %s %-4d %-6d at %s:%d' % |
| (bp.number, disp, enab, bp.hits, bp.ignore, |
| os.path.basename(bp.file), bp.line)) |
| if bp.cond: |
| info += '\n\tstop only if %s' % (bp.cond,) |
| info += '\n' |
| return info |
| |
| class Bdb(_bdb.Bdb): |
| """Extend Bdb to enhance test coverage.""" |
| |
| def trace_dispatch(self, frame, event, arg): |
| self.currentbp = None |
| return super().trace_dispatch(frame, event, arg) |
| |
| def set_break(self, filename, lineno, temporary=False, cond=None, |
| funcname=None): |
| if isinstance(funcname, str): |
| if filename == __file__: |
| globals_ = globals() |
| else: |
| module = importlib.import_module(filename[:-3]) |
| globals_ = module.__dict__ |
| func = eval(funcname, globals_) |
| code = func.__code__ |
| filename = code.co_filename |
| lineno = code.co_firstlineno |
| funcname = code.co_name |
| |
| res = super().set_break(filename, lineno, temporary=temporary, |
| cond=cond, funcname=funcname) |
| if isinstance(res, str): |
| raise BdbError(res) |
| return res |
| |
| def get_stack(self, f, t): |
| self.stack, self.index = super().get_stack(f, t) |
| self.frame = self.stack[self.index][0] |
| return self.stack, self.index |
| |
| def set_ignore(self, bpnum): |
| """Increment the ignore count of Breakpoint number 'bpnum'.""" |
| bp = self.get_bpbynumber(bpnum) |
| bp.ignore += 1 |
| |
| def set_enable(self, bpnum): |
| bp = self.get_bpbynumber(bpnum) |
| bp.enabled = True |
| |
| def set_disable(self, bpnum): |
| bp = self.get_bpbynumber(bpnum) |
| bp.enabled = False |
| |
| def set_clear(self, fname, lineno): |
| err = self.clear_break(fname, lineno) |
| if err: |
| raise BdbError(err) |
| |
| def set_up(self): |
| """Move up in the frame stack.""" |
| if not self.index: |
| raise BdbError('Oldest frame') |
| self.index -= 1 |
| self.frame = self.stack[self.index][0] |
| |
| def set_down(self): |
| """Move down in the frame stack.""" |
| if self.index + 1 == len(self.stack): |
| raise BdbError('Newest frame') |
| self.index += 1 |
| self.frame = self.stack[self.index][0] |
| |
| class Tracer(Bdb): |
| """A tracer for testing the bdb module.""" |
| |
| def __init__(self, expect_set, skip=None, dry_run=False, test_case=None): |
| super().__init__(skip=skip) |
| self.expect_set = expect_set |
| self.dry_run = dry_run |
| self.header = ('Dry-run results for %s:' % test_case if |
| test_case is not None else None) |
| self.init_test() |
| |
| def init_test(self): |
| self.cur_except = None |
| self.expect_set_no = 0 |
| self.breakpoint_hits = None |
| self.expected_list = list(islice(self.expect_set, 0, None, 2)) |
| self.set_list = list(islice(self.expect_set, 1, None, 2)) |
| |
| def trace_dispatch(self, frame, event, arg): |
| # On an 'exception' event, call_exc_trace() in Python/ceval.c discards |
| # a BdbException raised by the Tracer instance, so we raise it on the |
| # next trace_dispatch() call that occurs unless the set_quit() or |
| # set_continue() method has been invoked on the 'exception' event. |
| if self.cur_except is not None: |
| raise self.cur_except |
| |
| if event == 'exception': |
| try: |
| res = super().trace_dispatch(frame, event, arg) |
| return res |
| except BdbException as e: |
| self.cur_except = e |
| return self.trace_dispatch |
| else: |
| return super().trace_dispatch(frame, event, arg) |
| |
| def user_call(self, frame, argument_list): |
| # Adopt the same behavior as pdb and, as a side effect, skip also the |
| # first 'call' event when the Tracer is started with Tracer.runcall() |
| # which may be possibly considered as a bug. |
| if not self.stop_here(frame): |
| return |
| self.process_event('call', frame, argument_list) |
| self.next_set_method() |
| |
| def user_line(self, frame): |
| self.process_event('line', frame) |
| |
| if self.dry_run and self.breakpoint_hits: |
| info = info_breakpoints().strip('\n') |
| # Indent each line. |
| for line in info.split('\n'): |
| print(' ' + line) |
| self.delete_temporaries() |
| self.breakpoint_hits = None |
| |
| self.next_set_method() |
| |
| def user_return(self, frame, return_value): |
| self.process_event('return', frame, return_value) |
| self.next_set_method() |
| |
| def user_exception(self, frame, exc_info): |
| self.exc_info = exc_info |
| self.process_event('exception', frame) |
| self.next_set_method() |
| |
| def do_clear(self, arg): |
| # The temporary breakpoints are deleted in user_line(). |
| bp_list = [self.currentbp] |
| self.breakpoint_hits = (bp_list, bp_list) |
| |
| def delete_temporaries(self): |
| if self.breakpoint_hits: |
| for n in self.breakpoint_hits[1]: |
| self.clear_bpbynumber(n) |
| |
| def pop_next(self): |
| self.expect_set_no += 1 |
| try: |
| self.expect = self.expected_list.pop(0) |
| except IndexError: |
| raise BdbNotExpectedError( |
| 'expect_set list exhausted, cannot pop item %d' % |
| self.expect_set_no) |
| self.set_tuple = self.set_list.pop(0) |
| |
| def process_event(self, event, frame, *args): |
| # Call get_stack() to enable walking the stack with set_up() and |
| # set_down(). |
| tb = None |
| if event == 'exception': |
| tb = self.exc_info[2] |
| self.get_stack(frame, tb) |
| |
| # A breakpoint has been hit and it is not a temporary. |
| if self.currentbp is not None and not self.breakpoint_hits: |
| bp_list = [self.currentbp] |
| self.breakpoint_hits = (bp_list, []) |
| |
| # Pop next event. |
| self.event= event |
| self.pop_next() |
| if self.dry_run: |
| self.print_state(self.header) |
| return |
| |
| # Validate the expected results. |
| if self.expect: |
| self.check_equal(self.expect[0], event, 'Wrong event type') |
| self.check_lno_name() |
| |
| if event in ('call', 'return'): |
| self.check_expect_max_size(3) |
| elif len(self.expect) > 3: |
| if event == 'line': |
| bps, temporaries = self.expect[3] |
| bpnums = sorted(bps.keys()) |
| if not self.breakpoint_hits: |
| self.raise_not_expected( |
| 'No breakpoints hit at expect_set item %d' % |
| self.expect_set_no) |
| self.check_equal(bpnums, self.breakpoint_hits[0], |
| 'Breakpoint numbers do not match') |
| self.check_equal([bps[n] for n in bpnums], |
| [self.get_bpbynumber(n).hits for |
| n in self.breakpoint_hits[0]], |
| 'Wrong breakpoint hit count') |
| self.check_equal(sorted(temporaries), self.breakpoint_hits[1], |
| 'Wrong temporary breakpoints') |
| |
| elif event == 'exception': |
| if not isinstance(self.exc_info[1], self.expect[3]): |
| self.raise_not_expected( |
| "Wrong exception at expect_set item %d, got '%s'" % |
| (self.expect_set_no, self.exc_info)) |
| |
| def check_equal(self, expected, result, msg): |
| if expected == result: |
| return |
| self.raise_not_expected("%s at expect_set item %d, got '%s'" % |
| (msg, self.expect_set_no, result)) |
| |
| def check_lno_name(self): |
| """Check the line number and function co_name.""" |
| s = len(self.expect) |
| if s > 1: |
| lineno = self.lno_abs2rel() |
| self.check_equal(self.expect[1], lineno, 'Wrong line number') |
| if s > 2: |
| self.check_equal(self.expect[2], self.frame.f_code.co_name, |
| 'Wrong function name') |
| |
| def check_expect_max_size(self, size): |
| if len(self.expect) > size: |
| raise BdbSyntaxError('Invalid size of the %s expect tuple: %s' % |
| (self.event, self.expect)) |
| |
| def lno_abs2rel(self): |
| fname = self.canonic(self.frame.f_code.co_filename) |
| lineno = self.frame.f_lineno |
| return ((lineno - self.frame.f_code.co_firstlineno + 1) |
| if fname == self.canonic(__file__) else lineno) |
| |
| def lno_rel2abs(self, fname, lineno): |
| return (self.frame.f_code.co_firstlineno + lineno - 1 |
| if (lineno and self.canonic(fname) == self.canonic(__file__)) |
| else lineno) |
| |
| def get_state(self): |
| lineno = self.lno_abs2rel() |
| co_name = self.frame.f_code.co_name |
| state = "('%s', %d, '%s'" % (self.event, lineno, co_name) |
| if self.breakpoint_hits: |
| bps = '{' |
| for n in self.breakpoint_hits[0]: |
| if bps != '{': |
| bps += ', ' |
| bps += '%s: %s' % (n, self.get_bpbynumber(n).hits) |
| bps += '}' |
| bps = '(' + bps + ', ' + str(self.breakpoint_hits[1]) + ')' |
| state += ', ' + bps |
| elif self.event == 'exception': |
| state += ', ' + self.exc_info[0].__name__ |
| state += '), ' |
| return state.ljust(32) + str(self.set_tuple) + ',' |
| |
| def print_state(self, header=None): |
| if header is not None and self.expect_set_no == 1: |
| print() |
| print(header) |
| print('%d: %s' % (self.expect_set_no, self.get_state())) |
| |
| def raise_not_expected(self, msg): |
| msg += '\n' |
| msg += ' Expected: %s\n' % str(self.expect) |
| msg += ' Got: ' + self.get_state() |
| raise BdbNotExpectedError(msg) |
| |
| def next_set_method(self): |
| set_type = self.set_tuple[0] |
| args = self.set_tuple[1] if len(self.set_tuple) == 2 else None |
| set_method = getattr(self, 'set_' + set_type) |
| |
| # The following set methods give back control to the tracer. |
| if set_type in ('step', 'continue', 'quit'): |
| set_method() |
| return |
| elif set_type in ('next', 'return'): |
| set_method(self.frame) |
| return |
| elif set_type == 'until': |
| lineno = None |
| if args: |
| lineno = self.lno_rel2abs(self.frame.f_code.co_filename, |
| args[0]) |
| set_method(self.frame, lineno) |
| return |
| |
| # The following set methods do not give back control to the tracer and |
| # next_set_method() is called recursively. |
| if (args and set_type in ('break', 'clear', 'ignore', 'enable', |
| 'disable')) or set_type in ('up', 'down'): |
| if set_type in ('break', 'clear'): |
| fname, lineno, *remain = args |
| lineno = self.lno_rel2abs(fname, lineno) |
| args = [fname, lineno] |
| args.extend(remain) |
| set_method(*args) |
| elif set_type in ('ignore', 'enable', 'disable'): |
| set_method(*args) |
| elif set_type in ('up', 'down'): |
| set_method() |
| |
| # Process the next expect_set item. |
| # It is not expected that a test may reach the recursion limit. |
| self.event= None |
| self.pop_next() |
| if self.dry_run: |
| self.print_state() |
| else: |
| if self.expect: |
| self.check_lno_name() |
| self.check_expect_max_size(3) |
| self.next_set_method() |
| else: |
| raise BdbSyntaxError('"%s" is an invalid set_tuple' % |
| self.set_tuple) |
| |
| class TracerRun(): |
| """Provide a context for running a Tracer instance with a test case.""" |
| |
| def __init__(self, test_case, skip=None): |
| self.test_case = test_case |
| self.dry_run = test_case.dry_run |
| self.tracer = Tracer(test_case.expect_set, skip=skip, |
| dry_run=self.dry_run, test_case=test_case.id()) |
| self._original_tracer = None |
| |
| def __enter__(self): |
| # test_pdb does not reset Breakpoint class attributes on exit :-( |
| reset_Breakpoint() |
| self._original_tracer = sys.gettrace() |
| return self.tracer |
| |
| def __exit__(self, type_=None, value=None, traceback=None): |
| reset_Breakpoint() |
| sys.settrace(self._original_tracer) |
| |
| not_empty = '' |
| if self.tracer.set_list: |
| not_empty += 'All paired tuples have not been processed, ' |
| not_empty += ('the last one was number %d' % |
| self.tracer.expect_set_no) |
| |
| # Make a BdbNotExpectedError a unittest failure. |
| if type_ is not None and issubclass(BdbNotExpectedError, type_): |
| if isinstance(value, BaseException) and value.args: |
| err_msg = value.args[0] |
| if not_empty: |
| err_msg += '\n' + not_empty |
| if self.dry_run: |
| print(err_msg) |
| return True |
| else: |
| self.test_case.fail(err_msg) |
| else: |
| assert False, 'BdbNotExpectedError with empty args' |
| |
| if not_empty: |
| if self.dry_run: |
| print(not_empty) |
| else: |
| self.test_case.fail(not_empty) |
| |
| def run_test(modules, set_list, skip=None): |
| """Run a test and print the dry-run results. |
| |
| 'modules': A dictionary mapping module names to their source code as a |
| string. The dictionary MUST include one module named |
| 'test_module' with a main() function. |
| 'set_list': A list of set_type tuples to be run on the module. |
| |
| For example, running the following script outputs the following results: |
| |
| ***************************** SCRIPT ******************************** |
| |
| from test.test_bdb import run_test, break_in_func |
| |
| code = ''' |
| def func(): |
| lno = 3 |
| |
| def main(): |
| func() |
| lno = 7 |
| ''' |
| |
| set_list = [ |
| break_in_func('func', 'test_module.py'), |
| ('continue', ), |
| ('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 test.support.temp_cwd(): |
| sys.path.append(os.getcwd()) |
| try: |
| for m in modules: |
| fname = m + '.py' |
| with open(fname, 'w') as f: |
| f.write(textwrap.dedent(modules[m])) |
| linecache.checkcache(fname) |
| importlib.invalidate_caches() |
| yield |
| finally: |
| for m in modules: |
| test.support.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_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) |
| |
| def test_skip(self): |
| # Check that tracing is skipped over the import statement in |
| # 'tfunc_import()'. |
| 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', 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) |
| |
| 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 |
| with TracerRun(self) as tracer: |
| tracer.runeval('test_module_for_bdb.main()', globals(), locals()) |
| |
| 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) |
| |
| def test_main(): |
| test.support.run_unittest( |
| StateTestCase, |
| RunTestCase, |
| BreakpointTestCase, |
| IssuesTestCase, |
| ) |
| |
| if __name__ == "__main__": |
| test_main() |