Fix stage caplog records not clear

Closes #9877

Author: zx.qiu

AUTHORS

@@ -363,5 +363,6 @@ Yuval Shimon
 Zac Hatfield-Dodds
 Zachary Kneupper
 Zachary OBrien
+Zhouxin Qiu
 Zoltán Máté
 Zsolt Cserna

changelog/9877.bugfix.rst

@@ -0,0 +1 @@
+Fixed ``caplog.get_records(when)`` still get the stage records after ``caplog.clear()``

src/_pytest/logging.py

@@ -335,6 +335,16 @@ def __init__(self) -> None:
         """Create a new log handler."""
         super().__init__(StringIO())
         self.records: List[logging.LogRecord] = []
+        self.set_when(None)
+
+    def set_when(self, when: Optional[str]) -> None:
+        """Prepare for the given test phase (setup/call/teardown)."""
+        self._when = when
+
+    def get_when(self) -> Optional[str]:
+        return self._when
+
+    when = property(get_when, set_when)
 
     def emit(self, record: logging.LogRecord) -> None:
         """Keep the log records in a list in addition to the log text."""
@@ -441,6 +451,7 @@ def messages(self) -> List[str]:
     def clear(self) -> None:
         """Reset the list of log records and the captured log text."""
         self.handler.reset()
+        self._item.stash[caplog_records_key][self.handler.when] = self.records
 
     def set_level(self, level: Union[int, str], logger: Optional[str] = None) -> None:
         """Set the level of a logger for the duration of a test.
@@ -695,6 +706,7 @@ def _runtest_for(self, item: nodes.Item, when: str) -> Generator[None, None, Non
             level=self.log_level,
         ) as report_handler:
             caplog_handler.reset()
+            caplog_handler.set_when(when)
             report_handler.reset()
             item.stash[caplog_records_key][when] = caplog_handler.records
             item.stash[caplog_handler_key] = caplog_handler

testing/logging/test_fixture.py

@@ -172,6 +172,19 @@ def test_caplog_captures_for_all_stages(caplog, logging_during_setup_and_teardow
     assert set(caplog._item.stash[caplog_records_key]) == {"setup", "call"}
 
 
+def test_clear_for_call_stage(caplog, logging_during_setup_and_teardown):
+    logger.info("a_call_log")
+    assert [x.message for x in caplog.get_records("call")] == ["a_call_log"]
+    assert [x.message for x in caplog.get_records("setup")] == ["a_setup_log"]
+    assert set(caplog._item.stash[caplog_records_key]) == {"setup", "call"}
+
+    caplog.clear()
+
+    assert caplog.get_records("call") == []
+    assert [x.message for x in caplog.get_records("setup")] == ["a_setup_log"]
+    assert set(caplog._item.stash[caplog_records_key]) == {"setup", "call"}
+
+
 def test_ini_controls_global_log_level(pytester: Pytester) -> None:
     pytester.makepyfile(
         """