[elsherzd] Adding tests

[Ziaad-Khaled]

Testing Python Code Report

Description

This exercise involved adding assertion statements, writing unit and integration tests, and ensuring code coverage for a 2D diffusion equation solver (diffusion2d.py). The process included verifying the tests by intentionally introducing bugs and setting up automation using tox.

Notes

• Assertions: Added parameter checks. Identified that default temperature values were integers (300, 700), causing AssertionError: T_cold should be a float. Fixed by changing to floats (300., 700.).
• Unit Test Verification:
  • Intentionally introduced a bug in initialize_domain (self.nx = int(h / dx)).
  • Test test_initialize_domain correctly failed (AssertionError: 20 != 40).
  • Refactored tests to unittest and verified the bug was still caught.
• Integration Test Verification:
  • Intentionally introduced a bug in initialize_physical_parameters (used * instead of + in denominator).
  • Integration test test_initialize_physical_parameters correctly failed.