TESTS.md

Test Outline

This document summarizes the lightweight tests added to cover the pipeline helpers and datamosh bitstream behavior.

JavaScript (Vitest)

• src/jobs/ffmpegArgs.test.ts

  • Verifies SAFE_SCALE_FILTER matches the expected even-dimension filter.
  • Ensures buildAudioArgs selects AAC for mp4/m4v/mov and Opus for webm.
  • Ensures buildAudioArgs selects AAC for mkv outputs.
  • Ensures buildContainerArgs adds +faststart only for mp4/m4v/mov outputs.
  • Verifies getExtension normalizes and extracts extensions reliably.
  • Verifies parseExtraArgs keeps only safe flags and preserves quoted values.

• src/jobs/exportEncoding.test.ts

  • Checks deterministic bitrate cap estimates.
  • Verifies encoder arg construction for libx264, NVENC, and VP9 (including pass args).

• src/jobs/nativeEncoding.test.ts

  • Verifies safe extra args split between native encode and mux steps.
  • Confirms audio defaults for webm outputs.

• src/jobs/nativeVideo.test.ts

  • Checks native FPS resolution rules.
  • Confirms odd dimension normalization.

• src/system/path.test.ts

  • Confirms sanitizePath trims whitespace and strips surrounding quotes.
  • Confirms clean paths are returned unchanged.

Rust

• src-tauri/src/datamosh.rs (module tests)
  • datamosh_preserves_headers_and_first_intra_vop: headers are kept and the first intra VOP is always preserved even when drop intensity is 100%.
  • datamosh_errors_without_start_codes: returns the expected error when no MPEG-4 start codes are present.
  • datamosh_errors_without_vops: returns the expected error when no VOP frames exist in the bitstream.
  • datamosh_prepends_extradata_prefix: prepends extradata with a start code.
  • datamosh_drops_intra_frames_only_inside_windows: drops I-frames only inside the active window.

Running tests

• Frontend: pnpm test
• Rust: cd src-tauri && cargo test