pytest_{enter,leave}_pdb: pass through pdb instance

changelog/2619.feature.rst

@@ -1 +1,4 @@
 Resume capturing output after ``continue`` with ``__import__("pdb").set_trace()``.
+
+This also adds a new ``pytest_leave_pdb`` hook, and passes in ``pdb`` to the
+existing ``pytest_enter_pdb`` hook.

src/_pytest/debugging.py

@@ -95,7 +95,6 @@ def set_trace(cls, set_break=True):
             tw = _pytest.config.create_terminal_writer(cls._config)
             tw.line()
             tw.sep(">", "PDB set_trace (IO-capturing turned off)")
-            cls._pluginmanager.hook.pytest_enter_pdb(config=cls._config)
 
             class _PdbWrapper(cls._pdb_cls, object):
                 _pytest_capman = capman
@@ -108,7 +107,9 @@ def do_continue(self, arg):
                         tw.line()
                         tw.sep(">", "PDB continue (IO-capturing resumed)")
                         self._pytest_capman.resume_global_capture()
-                    cls._pluginmanager.hook.pytest_leave_pdb(config=cls._config)
+                    cls._pluginmanager.hook.pytest_leave_pdb(
+                        config=cls._config, pdb=self
+                    )
                     self._continued = True
                     return ret
 
@@ -129,6 +130,7 @@ def setup(self, f, tb):
                     return ret
 
             _pdb = _PdbWrapper()
+            cls._pluginmanager.hook.pytest_enter_pdb(config=cls._config, pdb=_pdb)
         else:
             _pdb = cls._pdb_cls()
 

src/_pytest/hookspec.py

@@ -603,19 +603,21 @@ def pytest_exception_interact(node, call, report):
     """
 
 
-def pytest_enter_pdb(config):
+def pytest_enter_pdb(config, pdb):
     """ called upon pdb.set_trace(), can be used by plugins to take special
     action just before the python debugger enters in interactive mode.
 
     :param _pytest.config.Config config: pytest config object
+    :param pdb.Pdb pdb: Pdb instance
     """
 
 
-def pytest_leave_pdb(config):
+def pytest_leave_pdb(config, pdb):
     """ called when leaving pdb (e.g. with continue after pdb.set_trace()).
 
     Can be used by plugins to take special action just after the python
     debugger leaves interactive mode.
 
     :param _pytest.config.Config config: pytest config object
+    :param pdb.Pdb pdb: Pdb instance
     """

testing/test_pdb.py

@@ -550,16 +550,26 @@ def test_pdb_collection_failure_is_shown(self, testdir):
     def test_enter_leave_pdb_hooks_are_called(self, testdir):
         testdir.makeconftest(
             """
+            mypdb = None
+
             def pytest_configure(config):
                 config.testing_verification = 'configured'
 
-            def pytest_enter_pdb(config):
+            def pytest_enter_pdb(config, pdb):
                 assert config.testing_verification == 'configured'
                 print('enter_pdb_hook')
 
-            def pytest_leave_pdb(config):
+                global mypdb
+                mypdb = pdb
+                mypdb.set_attribute = "bar"
+
+            def pytest_leave_pdb(config, pdb):
                 assert config.testing_verification == 'configured'
                 print('leave_pdb_hook')
+
+                global mypdb
+                assert mypdb is pdb
+                assert mypdb.set_attribute == "bar"
         """
         )
         p1 = testdir.makepyfile(