Rust_unit Test Cases

[DeviPriya-Kolla]

Description:
Develop unit tests for the Rust-based TBE processing library to verify the functionality, reliability, and correctness of each core function.

Developer Notes:
Utilize the built-in Rust testing framework by creating tests in a module annotated with #[cfg(test)]. Use the #[test] attribute for individual test cases.

Acceptance Criteria:

• 80% test coverage for each core function
  • Reading TBE files
  • Outputting TBE files
  • Stripping and isolating headers
  • Outputting CSV files
  • Reading a directory of files
• include edge case testing
  • missing/incomplete metadata fields
  • incomplete/malformed TBL sections
  • malformed/missing ATT attributes
  • invalid datatypes or unexpected input formats
• At least 7 unit tests
• Each test should give clear reporting
• implement automated testing setup