[lldb/test] Prevent TestFrameRecognizer.py to fail because of internal recognizers (NFC)

By clearing the recognizers before starting the test, we ensure that the
recognizers that get initialized when lldb starts won't alter the
expected results of this test (i.e. recognizer index).

Signed-off-by: Med Ismail Bennani <[email protected]>

Author: medismailben

lldb/packages/Python/lldbsuite/test/commands/frame/recognizer/TestFrameRecognizer.py

@@ -22,6 +22,9 @@ def test_frame_recognizer_1(self):
         target = self.dbg.CreateTarget(self.getBuildArtifact("a.out"))
         self.assertTrue(target, VALID_TARGET)
 
+        # Clear internal & plugins recognizers that get initialized at launch
+        self.runCmd("frame recognizer clear")
+
         self.runCmd("command script import " + os.path.join(self.getSourceDir(), "recognizer.py"))
 
         self.expect("frame recognizer list",