test: improve frontend coverage 26% → 70%

[thedavidweng]

Summary

Improve frontend test coverage from 26.04% to 69.73% lines (499 → 1348 covered lines). 801 tests, all passing.

New test files (11)

File	Covers
model-slice.test.ts	Store model slice (model pack selection, download, bootstrap)
settings-slice.test.ts	Store settings slice (get/set/reset, device info)
api.test.ts	Tauri command wrappers (invoke mocking)
diagnostics.test.ts	Diagnostics utility
window-shell.test.ts	Window shell state management
playback-bar.test.tsx	PlaybackBar (play/pause, seek, volume, track switching)
toast.test.tsx	Toast notification (render, dismiss)
bootstrap-banners.test.tsx	DemoBanner, ModelBootstrapBanner, UpdateBanner
generation-panel-subcomponents.test.tsx	FormBody, Header, ActionFooter, shared utils
settings-components.test.tsx	SetupScreen, SettingsOverlay
layout-components.test.tsx	AppLayout, MainContentView, OpenLoopStage, SidebarRail, Toolbar, WindowChrome

Expanded test files (3)

• store-slices.test.ts — generation and history slice gap coverage
• app-shortcuts.test.ts — uncovered branches
• prompt-examples.test.ts — uncovered code paths

Test plan

• All 801 tests pass (pnpm vitest run)
• Coverage thresholds met (pnpm vitest run --coverage)
• No excluded files tested (types, barrel files, i18n, main.tsx)
• Codecov CI passes on this PR

[greptile-apps]

Greptile Summary

This PR adds 11 new test files and expands 3 existing ones to improve frontend line coverage from ~26% to ~70%, plus a one-line CI fix that downgrades codecov/test-results-action from @v5 to @v1.

• New test files cover the Zustand store slices (model, settings, generation, history), all Tauri API wrappers, diagnostic utilities, window-shell state logic, and the major UI components (PlaybackBar, Toast, bootstrap banners, generation panel subcomponents, layout components, and settings screens).
• Existing test files (store-slices.test.ts, app-shortcuts.test.ts, prompt-examples.test.ts) are expanded with gap-coverage for previously untested branches.
• The CI workflow changes codecov/test-results-action@v5 → @v1; the separate codecov/codecov-action pin is untouched.

Confidence Score: 5/5

All changes are additive test code and a one-line CI action version fix; no production logic is modified.

Every changed file is either a new or expanded test file, or the CI workflow where the only edit corrects a wrong major-version tag on the Codecov test-results upload step. No store slices, components, or API wrappers were modified. The test assertions were verified against the actual source implementations and are accurate throughout.

The CI workflow change (codecov/test-results-action version) is worth a quick sanity-check that Codecov CI actually passes after merge, as that checkbox was left unchecked in the PR description.

Important Files Changed

Filename	Overview
.github/workflows/ci.yml	Downgrades codecov/test-results-action from @v5 to @v1; likely correcting a wrong major-version reference since test-results-action only ships v1.
tests/unit/model-slice.test.ts	Thorough tests for model pack selection, download/delete, bootstrap status transitions, and Tauri vs preview-mode paths. Assertions align with the actual model-packs.ts logic.
tests/unit/settings-slice.test.ts	Covers addRecentPrompt, toggleFavoritePrompt, removeRecentPrompt, setLanguage, completeSetup, hydrateFromPersistence, and device-info hydration with correct assertions and isolation.
tests/unit/store-slices.test.ts	Expands existing generation/history slice tests with deleteGenerationRecord, clearGenerationHistory, loadGenerationSettings, cancelGeneration, batch operations, and resumeActiveTask scenarios.
tests/unit/playback-bar.test.tsx	Covers PlaybackBar with no track, with a loaded track, play/pause, seek, volume, track switching, and compare mode. Module-level getBoundingClientRect override is class-scoped and safe within the worker.
tests/unit/layout-components.test.tsx	Tests WindowChrome, Toolbar, SidebarRail (including drag resize), MainContentView, OpenLoopStage, and AppLayout; uses vi.hoisted to patch jsdom's missing setPointerCapture before imports.
tests/unit/settings-components.test.tsx	Tests SetupScreen and SettingsOverlay rendering, tab navigation, section switches, and danger-zone confirmations with well-isolated component mocks.
tests/unit/api.test.ts	New file; exercises every Tauri invoke wrapper with correct argument shapes including null-query normalization for listGenerations.
tests/unit/window-shell.test.ts	Tests getDefaultWindowShellState, resolveWindowShellState (including guard against zero/negative/NaN/Infinity values), createWindowShellStyle, and the useWindowShellState hook including cancellation on unmount.
tests/unit/bootstrap-banners.test.tsx	Tests DemoBanner, ModelBootstrapBanner, and UpdateBanner render and interaction paths; minor use of 'small' as modelVariant (invalid enum value) but doesn't affect correctness given the loose storeState typing.
tests/unit/generation-panel-subcomponents.test.tsx	Covers FieldError, FieldLabel, FilePickerField, handleTextFieldChange, Header, FormBody, and ActionFooter with realistic props and interaction tests.
tests/unit/diagnostics.test.ts	Verifies collectDiagnostics and formatDiagnostics guard on TAURI_INTERNALS, invoke call, error propagation, and pretty-print output.
tests/unit/toast.test.tsx	Covers Toast render, dismiss, action button, auto-close with fake timers, custom duration, and timer cleanup on unmount.
tests/unit/app-shortcuts.test.ts	Expands coverage with getShortcutPlatform (all platforms including SSR), getShortcutDisplay, isInputFocused (input/textarea/select/contentEditable), and matchesShortcut branch tests.
tests/unit/prompt-examples.test.ts	Expands coverage for uncovered code paths in prompt-examples.ts.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    subgraph StoreSlices["Store Slices (unit tested)"]
        MS[model-slice.test.ts]
        SS[settings-slice.test.ts]
        GS[store-slices.test.ts]
    end
    subgraph Utilities["Utilities (unit tested)"]
        API[api.test.ts]
        WS[window-shell.test.ts]
        DX[diagnostics.test.ts]
        AS[app-shortcuts.test.ts]
    end
    subgraph Components["UI Components (unit tested)"]
        PB[playback-bar.test.tsx]
        BB[bootstrap-banners.test.tsx]
        GP[generation-panel-subcomponents.test.tsx]
        LC[layout-components.test.tsx]
        SC[settings-components.test.tsx]
        TT[toast.test.tsx]
    end
    CI[.github/workflows/ci.yml]
    StoreSlices --> Components
    Utilities --> StoreSlices
    CI -.->|uploads JUnit results| StoreSlices

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%%{init: {'theme': 'base', 'themeVariables': {"darkMode": true, "background": "#0d1117", "primaryColor": "#21262d", "primaryTextColor": "#e6edf3", "primaryBorderColor": "#8b949e", "lineColor": "#8b949e", "textColor": "#e6edf3", "edgeLabelBackground": "#161b22", "actorBkg": "#21262d", "actorBorder": "#8b949e", "actorTextColor": "#e6edf3", "actorLineColor": "#8b949e", "signalColor": "#8b949e", "signalTextColor": "#e6edf3", "noteBkgColor": "#373320", "noteBorderColor": "#d4a72c", "noteTextColor": "#f0e6c0", "labelBoxBkgColor": "#21262d", "labelBoxBorderColor": "#8b949e", "labelTextColor": "#e6edf3", "loopTextColor": "#e6edf3", "activationBkgColor": "#30363d", "activationBorderColor": "#8b949e"}}}%%
flowchart TD
    subgraph StoreSlices["Store Slices (unit tested)"]
        MS[model-slice.test.ts]
        SS[settings-slice.test.ts]
        GS[store-slices.test.ts]
    end
    subgraph Utilities["Utilities (unit tested)"]
        API[api.test.ts]
        WS[window-shell.test.ts]
        DX[diagnostics.test.ts]
        AS[app-shortcuts.test.ts]
    end
    subgraph Components["UI Components (unit tested)"]
        PB[playback-bar.test.tsx]
        BB[bootstrap-banners.test.tsx]
        GP[generation-panel-subcomponents.test.tsx]
        LC[layout-components.test.tsx]
        SC[settings-components.test.tsx]
        TT[toast.test.tsx]
    end
    CI[.github/workflows/ci.yml]
    StoreSlices --> Components
    Utilities --> StoreSlices
    CI -.->|uploads JUnit results| StoreSlices

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_{Reviews (6): Last reviewed commit: "fix: stub setPointerCapture for jsdom in..." | Re-trigger Greptile}

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