add integration test

[harryscholes]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @harryscholes, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly refactors the project structure by moving the primary data write and read operations into a dedicated library module. This change enables the addition of a comprehensive integration test that validates the complete data flow, from generation and storage to retrieval and processing, using temporary files to ensure test isolation and cleanliness.

Highlights

• Code Refactoring: The core logic for writing and reading data, previously residing in src/main.rs, has been extracted and moved into a new library file, src/lib.rs. This promotes modularity and reusability.
• Integration Test Added: A new integration test, test_write_then_read, has been introduced in tests/integration.rs. This test verifies the end-to-end functionality of writing data to a Vortex file and subsequently reading it back.
• Dependency Update: The tempfile crate has been added as a development dependency to facilitate the creation and management of temporary files for testing purposes.

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[gemini-code-assist]

Code Review

The pull request introduces an integration test and refactors the main application logic into a library. This is a positive change for modularity and testability. The new src/lib.rs file contains the core write_command and read_command functions, which are then used by src/main.rs and the new integration test. The Cargo.toml and Cargo.lock files are updated to reflect the new tempfile dependency for testing. Overall, the changes improve the project structure and add valuable testing coverage.