Daily Test Coverage ImproverResearch and Plan

[github-actions[bot]]

Repository Summary

HardwareVisualizer is a cross-platform hardware monitoring app built with Tauri (Rust + React/TypeScript). It has two test suites: a frontend suite (Vitest) and a backend suite (Rust cargo test).

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Current Test Coverage

Frontend (Vitest + v8 coverage)

Tests run with npm test (= vitest run --coverage). As of initial analysis (2026-02-21):

Metric	Coverage
Statements	77.81%
Branches	66.76%
Functions	71.20%
Lines	79.84%

35 test files, 152 tests — all passing.

Coverage thresholds set at 60% for all metrics (passing).

Backend (Rust)

• Test files in src-tauri/src/_tests/: background_image_test.rs, settings_test.rs, commands/
• Run via cargo tauri-test
• No coverage tooling currently configured (no cargo-llvm-cov or grcov)

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Files with Zero Coverage (Frontend)

These are the highest-priority targets for new tests:

File	Notes
hooks/useWindowSize.ts	Responsive breakpoint hook using resize events
hooks/useTitleIconVisualSelector.ts	Simple Jotai atom hook for title icon visibility
features/menu/hooks/useMenu.ts	Menu open/close state + display target (uses Tauri Store)
features/hardware/dashboard/hooks/useSortableDashboard.ts	DnD sorting with Tauri Store + hardware init
features/hardware/hooks/useGpuNames.ts	SQLite query hook for GPU names
features/hardware/insights/process/funcs/getProcessStatsRecord.ts	Pure async function: SQLite query builder
features/hardware/insights/snapshot/funcs/getArchivedRecord.ts	Pure async functions: SQLite query builders
features/hardware/insights/process/hooks/useProcessStatsAtom.ts	Simple Jotai atom hook

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Files with Low Coverage (Frontend)

File	Stmts	Branches	Funcs	Lines
features/hardware/dashboard/hooks/useExportToClipboard.ts	64%	25%	27%	64%
features/settings/hooks/useSettingsAtom.ts	67.7%	62.5%	62.5%	69%
features/hardware/hooks/useHardwareInfoAtom.ts	71%	66.7%	75%	71%
hooks/useFullScreenMode.ts	66.7%	100%	50%	66.7%
features/hardware/insights/snapshot/hooks/useSnapshot.ts	84.7%	62.7%	94.1%	87.4%

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Test Commands

# Install dependencies
- name: Setup Node.js
  uses: ./.github/actions/setup-node   # runs npm ci

# Run frontend tests with coverage
- name: Run frontend tests with coverage
  run: npm test
  # Produces: coverage/coverage-summary.json, coverage/ (HTML)

# Report coverage to PR (used in CI)
- name: Report coverage
  uses: davelosert/vitest-coverage-report-action@v2
  with:
    json-summary-path: coverage/coverage-summary.json

# Run backend tests (no coverage tooling yet)
- name: Run backend tests
  run: cargo tauri-test

For local development:

npm ci              # install deps
npm test            # run all frontend tests + coverage (vitest run --coverage)
npm run lint:ci     # lint check (Biome)

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Test Organization

• Frontend: Tests co-located with source at src/**/*.test.ts(x)
• Backend: Tests in src-tauri/src/_tests/ directory
• Framework: Vitest + @testing-library/react + @testing-library/jest-dom
• Mocking: vi.mock() for Tauri APIs; Jotai atoms tested via renderHook
• Setup: src/setupVitest.ts (extends jest-dom matchers)

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Improvement Plan

Priority 1 — Zero-coverage, high-value targets

1. hooks/useTitleIconVisualSelector.ts — Simple Jotai atom; easiest win
2. hooks/useProcessStatsAtom.ts — Simple Jotai atom; trivial to test
3. hooks/useWindowSize.ts — Window resize hook; mock globalThis.innerWidth and resize events
4. features/hardware/insights/snapshot/funcs/getArchivedRecord.ts — Pure async functions; mock sqlitePromise
5. features/hardware/insights/process/funcs/getProcessStatsRecord.ts — Pure async function; mock sqlitePromise

Priority 2 — Zero-coverage, more complex

6. features/menu/hooks/useMenu.ts — Mock useTauriStore, test open/close and navigation
7. features/hardware/hooks/useGpuNames.ts — Mock SQLite, test GPU name list loading
8. features/hardware/dashboard/hooks/useSortableDashboard.ts — Mock DnD events + Tauri Store

Priority 3 — Improve existing low coverage

9. features/hardware/dashboard/hooks/useExportToClipboard.ts — Add branch coverage (25% → higher)
10. features/settings/hooks/useSettingsAtom.ts — Cover remaining 3 uncovered functions
11. hooks/useFullScreenMode.ts — Cover the uncovered function path

Rust backend

• No coverage tooling in place; existing tests cover background_image and settings commands
• Future opportunity: add cargo-llvm-cov to measure and improve Rust coverage

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Opportunities for Large Coverage Gains

• The getArchivedRecord.ts file contains 3 separate exported functions (all 0% covered) — a single test file could cover all of them
• useTitleIconVisualSelector and useProcessStatsAtom are simple atom wrappers — very quick wins
• useWindowSize covers important UI breakpoint logic used throughout the app — good ROI
• Adding Rust coverage instrumentation (cargo-llvm-cov) could reveal untested backend paths

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How to Control this Workflow

Add comments to this discussion to provide feedback or adjust the plan.

Available commands:

gh aw disable daily-test-improver --repo shm11C3/HardwareVisualizer
gh aw enable daily-test-improver --repo shm11C3/HardwareVisualizer
gh aw run daily-test-improver --repo shm11C3/HardwareVisualizer --repeat (number-of-repeats)
gh aw logs daily-test-improver --repo shm11C3/HardwareVisualizer

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What Happens Next

On the next run, this workflow will enter Phase 2: it will select a goal from the plan above, implement new tests to improve coverage, verify they pass and improve coverage metrics, and open a draft pull request with the changes. It will then comment here with results.

Each subsequent run will pick the next area of low coverage and iterate, gradually improving the overall test coverage of the repository.

AI generated by Daily Test Coverage Improver

• expires on Feb 28, 2026, 5:45 AM UTC

[github-actions[bot]]

Phase 2 complete. Targeted the 5 zero-coverage files from the plan and added 28 new tests across useTitleIconVisualSelector, useWindowSize, useProcessStatsAtom, getProcessStatsRecord, and getArchivedRecord.

Coverage improvement: Statements 77.81% → 84.86% (+7.05pp), Branches 66.76% → 71.38% (+4.62pp), Functions 71.20% → 78.80% (+7.60pp), Lines 79.84% → 86.62% (+6.78pp). All 180 tests pass.

Draft PR created with full details. Next run will target remaining zero-coverage files (useMenu, useGpuNames, useSortableDashboard) or low-coverage files (useExportToClipboard branches at 25%, useSettingsAtom, useFullScreenMode).

Generated by Daily Test Coverage Improver

To install this workflow, run gh aw add githubnext/agentics/workflows/daily-test-improver.md@6e3afce4db3e30c6d8e7201c37ea1efb130f6427. View source at https://github.com/githubnext/agentics/tree/6e3afce4db3e30c6d8e7201c37ea1efb130f6427/workflows/daily-test-improver.md.

[github-actions[bot]]

Phase 2 run complete. Worked on zero-coverage and low-coverage hooks: useGpuNames (0%→100%), useMenu (0%→100% stmts/funcs), useFullScreenMode (66.7%→100%), and the three uncovered hardware archive functions in useSettingsAtom (62.5%→100% funcs).

Overall coverage improved: Statements 84.86% → 89.28% (+4.42pp), Functions 78.80% → 84.80% (+6.00pp), Lines 86.62% → 90.91% (+4.29pp). Draft PR created with all 194 tests passing.

Generated by Daily Test Coverage Improver

To install this workflow, run gh aw add githubnext/agentics/workflows/daily-test-improver.md@6e3afce4db3e30c6d8e7201c37ea1efb130f6427. View source at https://github.com/githubnext/agentics/tree/6e3afce4db3e30c6d8e7201c37ea1efb130f6427/workflows/daily-test-improver.md.

[github-actions[bot]]

Phase 2 run complete. Targeted useSortableDashboard (0%→~100%), fetchMemoryInfoDetail in useHardwareInfoAtom, processors array branch + cpu not-implemented paths in useHardwareData, and useBurnInShift cleanup/unmount paths.

Overall coverage improved: Statements 89.07% → 92.90% (+3.83pp), Branches 72.88% → 76.83% (+3.95pp), Functions 84.80% → 88.00% (+3.20pp), Lines 90.59% → 94.55% (+3.96pp). All 206 tests pass. Draft PR created with full details.

Generated by Daily Test Coverage Improver

To install this workflow, run gh aw add githubnext/agentics/workflows/daily-test-improver.md@6e3afce4db3e30c6d8e7201c37ea1efb130f6427. View source at https://github.com/githubnext/agentics/tree/6e3afce4db3e30c6d8e7201c37ea1efb130f6427/workflows/daily-test-improver.md.

[github-actions[bot]]

Run complete. Worked on useExportToClipboard.ts (branches 25% → 93.75%) and useStickyObserver.ts (functions 75% → 100%, lines 90.9% → 100%). Overall branch coverage improved from 76.83% → 79.94% (+3.11pp), functions from 88.04% → 90.43% (+2.39pp). 223 tests, all passing. Draft PR created: Daily Test Coverage Improver: Expand branch coverage for useExportToClipboard and useStickyObserver.

Generated by Daily Test Coverage Improver

To install this workflow, run gh aw add githubnext/agentics/workflows/daily-test-improver.md@6e3afce4db3e30c6d8e7201c37ea1efb130f6427. View source at https://github.com/githubnext/agentics/tree/6e3afce4db3e30c6d8e7201c37ea1efb130f6427/workflows/daily-test-improver.md.

[shm11C3]

Added cargo-llvm-cov in #1145.

[github-actions[bot]]

This discussion was automatically closed because it expired on 2026-02-28T05:45:04.938Z.

Closed by Workflow