[LLDB][SBProgress] Fix bad optional in sbprogress (#128971)

This fixes the obvious, but untested case of sending None/Null to
SBProgress. 

1 files changed, 32 insertions, 0 deletions

diff --git a/lldb/test/API/python_api/sbprogress/TestSBProgress.py b/lldb/test/API/python_api/sbprogress/TestSBProgress.py
index c456247..1b8f01d 100644
--- a/lldb/test/API/python_api/sbprogress/TestSBProgress.py
+++ b/lldb/test/API/python_api/sbprogress/TestSBProgress.py
@@ -33,3 +33,35 @@ class SBProgressTestCase(TestBase):
         expected_string = "Test progress first increment"
         progress.Increment(1, expected_string)
         self.assertFalse(listener.PeekAtNextEvent(event))
+
+    def test_with_external_bit_set(self):
+        """Test SBProgress can handle null events."""
+
+        progress = lldb.SBProgress("Test SBProgress", "Test progress", 3, self.dbg)
+        listener = lldb.SBListener("Test listener")
+        broadcaster = self.dbg.GetBroadcaster()
+        broadcaster.AddListener(listener, lldb.eBroadcastBitExternalProgress)
+        event = lldb.SBEvent()
+        # Sample JSON we're expecting:
+        # { id = 2, title = "Test SBProgress", details = "Test progress", type = update, progress = 1 of 3}
+        # details remains the same as specified in the constructor of the progress
+        # until we update it in the increment function, so we check for the Null and empty string case
+        # that details hasn't changed, but progress x of 3 has.
+        progress.Increment(1, None)
+        self.assertTrue(listener.GetNextEvent(event))
+        stream = lldb.SBStream()
+        event.GetDescription(stream)
+        self.assertIn("Test progress", stream.GetData())
+        self.assertIn("1 of 3", stream.GetData())
+
+        progress.Increment(1, "")
+        self.assertTrue(listener.GetNextEvent(event))
+        event.GetDescription(stream)
+        self.assertIn("Test progress", stream.GetData())
+        self.assertIn("2 of 3", stream.GetData())
+
+        progress.Increment(1, "Step 3")
+        self.assertTrue(listener.GetNextEvent(event))
+        stream = lldb.SBStream()
+        event.GetDescription(stream)
+        self.assertIn("Step 3", stream.GetData())