Tests that stepping into custom element methods will lead to a pause in the callbacks.
-Debugger was enabled.
+[page] Invoked createdCallback.
+[page] Invoked attributeChangedCallback.
+[page] Invoked attachedCallback.
+[page] Invoked detachedCallback.
Set timer for test function.
Stepping to constructor...
Stepping into constructor...
PASS: Did step into event listener(createdCallback).
-Invoked createdCallback.
Stepping to setAttribute...
Stepping into setAttribute...
PASS: Did step into event listener(attributeChangedCallback).
-Invoked attributeChangedCallback.
Stepping to attachedCallback...
Stepping into attachedCallback...
PASS: Did step into event listener(attachedCallback).
-Invoked attachedCallback.
Stepping to detachedCallback...
Stepping into detachedCallback...
PASS: Did step into event listener(detachedCallback).
-Invoked detachedCallback.
-Debugger was disabled.