mib updated this revision to Diff 416586.
mib added a comment.

Update `EventListener.tearDown` comment


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D121977/new/

https://reviews.llvm.org/D121977

Files:
  lldb/packages/Python/lldbsuite/test/eventlistener.py
  lldb/test/API/functionalities/diagnostic_reporting/TestDiagnosticReporting.py
  lldb/test/API/functionalities/progress_reporting/TestProgressReporting.py

Index: lldb/test/API/functionalities/progress_reporting/TestProgressReporting.py
===================================================================
--- lldb/test/API/functionalities/progress_reporting/TestProgressReporting.py
+++ lldb/test/API/functionalities/progress_reporting/TestProgressReporting.py
@@ -2,57 +2,26 @@
 Test that we are able to broadcast and receive progress events from lldb
 """
 import lldb
-from lldbsuite.test.lldbtest import *
-from lldbsuite.test.decorators import *
+
 import lldbsuite.test.lldbutil as lldbutil
-import threading
 
-class TestProgressReporting(TestBase):
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test.eventlistener import EventListener
+
 
-    mydir = TestBase.compute_mydir(__file__)
+class TestProgressReporting(EventListener):
 
-    eBroadcastBitStopProgressThread = (1 << 0)
+    mydir = TestBase.compute_mydir(__file__)
 
     def setUp(self):
-        TestBase.setUp(self)
-        self.progress_events = []
-
-    def fetch_events(self):
-        event = lldb.SBEvent()
-
-        done = False
-        while not done:
-            if self.listener.WaitForEvent(1, event):
-                event_mask = event.GetType();
-                if event.BroadcasterMatchesRef(self.test_broadcaster):
-                    if event_mask & self.eBroadcastBitStopProgressThread:
-                        done = True;
-                elif event.BroadcasterMatchesRef(self.progress_broadcaster):
-                    ret_args = lldb.SBDebugger().GetProgressFromEvent(event);
-                    self.assertGreater(len(ret_args), 1)
-
-                    message = ret_args[0]
-                    if message:
-                        self.progress_events.append((message, event))
+        TestBase.setUp(self) # we need this to be able to access `self.dbg`
+        EventListener.setUp(self, self.dbg.GetBroadcaster(),
+                            lldb.SBDebugger.eBroadcastBitProgress,
+                            lldb.SBDebugger.GetProgressFromEvent)
 
     def test_dwarf_symbol_loading_progress_report(self):
         """Test that we are able to fetch dwarf symbol loading progress events"""
         self.build()
 
-        self.listener = lldb.SBListener("lldb.progress.listener")
-        self.test_broadcaster = lldb.SBBroadcaster('lldb.broadcaster.test')
-        self.listener.StartListeningForEvents(self.test_broadcaster,
-                                              self.eBroadcastBitStopProgressThread)
-
-        self.progress_broadcaster = self.dbg.GetBroadcaster()
-        self.progress_broadcaster.AddListener(self.listener, lldb.SBDebugger.eBroadcastBitProgress)
-
-        listener_thread = threading.Thread(target=self.fetch_events)
-        listener_thread.start()
-
         lldbutil.run_to_source_breakpoint(self, 'break here', lldb.SBFileSpec('main.c'))
-
-        self.test_broadcaster.BroadcastEventByType(self.eBroadcastBitStopProgressThread)
-        listener_thread.join()
-
-        self.assertGreater(len(self.progress_events), 0)
+        self.assertGreater(len(self.fetched_events), 0)
Index: lldb/test/API/functionalities/diagnostic_reporting/TestDiagnosticReporting.py
===================================================================
--- lldb/test/API/functionalities/diagnostic_reporting/TestDiagnosticReporting.py
+++ lldb/test/API/functionalities/diagnostic_reporting/TestDiagnosticReporting.py
@@ -2,51 +2,24 @@
 Test that we are able to broadcast and receive diagnostic events from lldb
 """
 import lldb
-from lldbsuite.test.lldbtest import *
-from lldbsuite.test.decorators import *
+
 import lldbsuite.test.lldbutil as lldbutil
-import threading
 
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test.eventlistener import EventListener
 
-class TestDiagnosticReporting(TestBase):
+class TestDiagnosticReporting(EventListener):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    eBroadcastBitStopDiagnosticThread = (1 << 0)
-
     def setUp(self):
-        TestBase.setUp(self)
-        self.diagnostic_events = []
-
-    def fetch_events(self):
-        event = lldb.SBEvent()
-
-        done = False
-        while not done:
-            if self.listener.WaitForEvent(1, event):
-                event_mask = event.GetType()
-                if event.BroadcasterMatchesRef(self.test_broadcaster):
-                    if event_mask & self.eBroadcastBitStopDiagnosticThread:
-                        done = True
-                elif event.BroadcasterMatchesRef(self.diagnostic_broadcaster):
-                    self.diagnostic_events.append(
-                        lldb.SBDebugger.GetDiagnosticFromEvent(event))
+        TestBase.setUp(self) # we need this to be able to access `self.dbg`
+        event_mask = lldb.SBDebugger.eBroadcastBitWarning | lldb.SBDebugger.eBroadcastBitError
+        EventListener.setUp(self, self.dbg.GetBroadcaster(), event_mask,
+                            lldb.SBDebugger.GetDiagnosticFromEvent)
 
     def test_dwarf_symbol_loading_diagnostic_report(self):
         """Test that we are able to fetch diagnostic events"""
-        self.listener = lldb.SBListener("lldb.diagnostic.listener")
-        self.test_broadcaster = lldb.SBBroadcaster('lldb.broadcaster.test')
-        self.listener.StartListeningForEvents(
-            self.test_broadcaster, self.eBroadcastBitStopDiagnosticThread)
-
-        self.diagnostic_broadcaster = self.dbg.GetBroadcaster()
-        self.diagnostic_broadcaster.AddListener(
-            self.listener, lldb.SBDebugger.eBroadcastBitWarning)
-        self.diagnostic_broadcaster.AddListener(
-            self.listener, lldb.SBDebugger.eBroadcastBitError)
-
-        listener_thread = threading.Thread(target=self.fetch_events)
-        listener_thread.start()
 
         self.yaml2obj("minidump.yaml", self.getBuildArtifact("minidump.core"))
 
@@ -55,13 +28,9 @@
         self.process = self.target.LoadCore(
             self.getBuildArtifact("minidump.core"))
 
-        self.test_broadcaster.BroadcastEventByType(
-            self.eBroadcastBitStopDiagnosticThread)
-        listener_thread.join()
-
-        self.assertEquals(len(self.diagnostic_events), 1)
+        self.assertEquals(len(self.fetched_events), 1)
 
-        diagnostic_event = self.diagnostic_events[0]
+        diagnostic_event = self.fetched_events[0]
         self.assertEquals(
             diagnostic_event.GetValueForKey("type").GetStringValue(100),
             "warning")
Index: lldb/packages/Python/lldbsuite/test/eventlistener.py
===================================================================
--- /dev/null
+++ lldb/packages/Python/lldbsuite/test/eventlistener.py
@@ -0,0 +1,57 @@
+import threading
+
+import lldb
+from lldbsuite.test.lldbtest import *
+
+class EventListener(TestBase):
+
+    """
+    Base class for lldb event listener tests.
+
+    This class will setup and start an event listener for the test to use.
+
+    If the event received matches the source broadcaster, the event is
+    queued up in a list that the user can access later on.
+    """
+    NO_DEBUG_INFO_TESTCASE = True
+
+    eBroadcastBitStopListenerThread = (1 << 0)
+    fetched_events = []
+
+
+    def setUp(self, src_broadcaster, event_mask, event_data_extractor):
+        self.src_broadcaster = src_broadcaster
+        self.broadcaster = lldb.SBBroadcaster('lldb.test.broadcaster')
+        self.listener = lldb.SBListener("lldb.test.listener")
+        self.listener.StartListeningForEvents(self.broadcaster,
+                                              self.eBroadcastBitStopListenerThread)
+
+        src_broadcaster.AddListener(self.listener, event_mask)
+
+        self.listener_thread = threading.Thread(target=self._fetch_events,
+                                                args=(event_data_extractor,))
+        self.listener_thread.start()
+
+    def tearDown(self):
+        # Broadcast a eBroadcastBitStopListenerThread` event so the background
+        # thread stops listening to events, then join the background thread.
+        self.broadcaster.BroadcastEventByType(self.eBroadcastBitStopListenerThread)
+        self.listener_thread.join()
+        TestBase.tearDown(self)
+
+    def _fetch_events(self, event_data_extractor):
+        event = lldb.SBEvent()
+
+        done = False
+        while not done:
+            if self.listener.GetNextEvent(event):
+                event_mask = event.GetType();
+                if event.BroadcasterMatchesRef(self.broadcaster):
+                    if event_mask & self.eBroadcastBitStopListenerThread:
+                        done = True;
+                elif event.BroadcasterMatchesRef(self.src_broadcaster):
+                    ret_args = event_data_extractor(event);
+                    if not ret_args:
+                        continue
+
+                    self.fetched_events.append(ret_args)
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