Method test_pdb_with_injected_do_debug

testing/test_debugging.py:603–676

Simulates pdbpp, which injects Pdb into do_debug, and uses self.__class__ in do_continue.

(self, pytester: Pytester)

    @pytest.mark.xfail(reason="#10042", strict=False)
    def test_pdb_with_injected_do_debug(self, pytester: Pytester) -> None:
        """Simulates pdbpp, which injects Pdb into do_debug, and uses
        self.__class__ in do_continue.
        """
        p1 = pytester.makepyfile(
            mytest="""
            import pdb
            import pytest

            count_continue = 0

            class CustomPdb(pdb.Pdb, object):
                def do_debug(self, arg):
                    import sys
                    import types

                    do_debug_func = pdb.Pdb.do_debug

                    newglobals = do_debug_func.__globals__.copy()
                    newglobals['Pdb'] = self.__class__
                    orig_do_debug = types.FunctionType(
                        do_debug_func.__code__, newglobals,
                        do_debug_func.__name__, do_debug_func.__defaults__,
                    )
                    return orig_do_debug(self, arg)
                do_debug.__doc__ = pdb.Pdb.do_debug.__doc__

                def do_continue(self, *args, **kwargs):
                    global count_continue
                    count_continue += 1
                    return super(CustomPdb, self).do_continue(*args, **kwargs)

            def foo():
                print("print_from_foo")

            def test_1():
                i = 0
                print("hello17")
                pytest.set_trace()
                x = 3
                print("hello18")

                assert count_continue == 2, "unexpected_failure: %d != 2" % count_continue
                pytest.fail("expected_failure")
        """
        )
        child = pytester.spawn_pytest(f"--pdbcls=mytest:CustomPdb {p1!s}")
        child.expect(r"PDB set_trace \(IO-capturing turned off\)")
        child.expect(r"\n\(Pdb")
        child.sendline("debug foo()")
        child.expect("ENTERING RECURSIVE DEBUGGER")
        child.expect(r"\n\(\(Pdb")
        child.sendline("c")
        child.expect("LEAVING RECURSIVE DEBUGGER")
        assert b"PDB continue" not in child.before
        # No extra newline.
        assert child.before.endswith(b"c\r\nprint_from_foo\r\n")