ProgressChanged signal is not emited

PRECONDITIONS:
1. Construct a message
2. Add message to message store.

STEPS LEADING TO PROBLEM:
1. Construct a message
2. Add the message to message store
3. Query message with message filter and body as in parameters.
4. queryMessage returns TRUE.
5. progressChanged SIGNAL is not emitted.
6. Spy count is 0

EXPECTED OUTCOME:
1. progressChanged SIGNAL has to be emitted.

ACTUAL OUTCOME:
1. Message is added to message store
2. querryMessages API returns True.
3. progressChanged SIGNAL is not emitted.
4. spy count is 0.