test: Add unit test for pydumpling/rpdb.py

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Trigger Info

Trigger Type	Triggered By	Source File	Assignment
Manual	cocolato	pydumpling/rpdb.py	Detail

Summary

This PR introduces comprehensive unit tests for the pydumpling.rpdb module, ensuring robust coverage and validation of its functionality. The key additions and changes include:

• Tests for FileObjectWrapper:

  • Validation of attribute access from both the wrapped file object and the standard I/O object.

  • Handling of AttributeError for non-existent attributes.

• Tests for Rpdb:

  • Initialization tests to verify socket setup, binding, and acceptance of connections.

  • Tests for shutdown behavior, ensuring proper cleanup of resources.

  • Tests for debugger commands (do_continue, do_quit, do_EOF) to confirm correct behavior and resource cleanup.

• Tests for OccupiedPorts:

  • Validation of port claiming and unclaiming functionality.

  • Ensuring thread safety when multiple threads interact with the OccupiedPorts instance.

• Tests for r_post_mortem:

  • Verification of debugger interaction with a loaded dump file.

  • Support for custom address and port configurations.

These tests utilize pytest and extensive mocking to simulate various scenarios, ensuring the module's reliability and correctness.

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