---
phase: 09-ci-pipeline
plan: 02
subsystem: testing
tags: [vitest, svelte5, browser-testing, coverage, unit-tests]

# Dependency graph
requires:
  - phase: 09-01
    provides: Multi-project Vitest configuration, SvelteKit module mocks
provides:
  - Comprehensive utility function tests (100% coverage for utils)
  - Browser-mode component testing pattern for Svelte 5
  - Coverage thresholds preventing regression
affects: [09-03, 09-04]

# Tech tracking
tech-stack:
  added: []
  patterns: [vitest-browser-mode-testing, svelte5-component-tests, coverage-threshold-enforcement]

key-files:
  created:
    - src/lib/utils/highlightText.test.ts
    - src/lib/utils/parseHashtags.test.ts
    - src/lib/components/CompletedToggle.svelte.test.ts
    - src/lib/components/SearchBar.svelte.test.ts
    - src/lib/components/TagInput.svelte.test.ts
  modified:
    - vite.config.ts
    - vitest-setup-client.ts

key-decisions:
  - "Coverage thresholds set at statements 10%, branches 5%, functions 20%, lines 8%"
  - "Target is 80% coverage, thresholds will increase incrementally"
  - "Component tests use vitest/browser import (not deprecated @vitest/browser/context)"
  - "SvelteKit mocks centralized in vitest-setup-client.ts"

patterns-established:
  - "Import page from 'vitest/browser' for browser-mode tests"
  - "Use render from vitest-browser-svelte for Svelte 5 components"
  - "page.getByRole(), page.getByText(), page.getByPlaceholder() for element selection"
  - "await expect.element(locator).toBeInTheDocument() for assertions"

# Metrics
duration: 4min
completed: 2026-02-03
---

# Phase 9 Plan 2: Unit & Component Tests Summary

**Comprehensive utility function tests and browser-mode component tests establishing testing patterns for the codebase**

## Performance

- **Duration:** 4 min
- **Started:** 2026-02-03T23:32:00Z
- **Completed:** 2026-02-03T23:37:00Z
- **Tasks:** 3
- **Files modified:** 6

## Accomplishments

- All 3 utility functions (filterEntries, highlightText, parseHashtags) have 100% test coverage
- 3 Svelte 5 components tested with browser-mode pattern (SearchBar, TagInput, CompletedToggle)
- 94 total tests passing (76 server/node mode, 18 client/browser mode)
- Coverage thresholds configured to prevent regression

## Task Commits

Each task was committed atomically:

1. **Task 1: Write unit tests for utility functions** - `20d9ebf` (test)
2. **Task 2: Write browser-mode component tests** - `43446b8` (test)
3. **Task 3: Configure coverage thresholds** - `d647308` (chore)

## Files Created/Modified

- `src/lib/utils/highlightText.test.ts` - 24 tests for text highlighting
- `src/lib/utils/parseHashtags.test.ts` - 35 tests for hashtag parsing
- `src/lib/components/CompletedToggle.svelte.test.ts` - 5 tests for toggle component
- `src/lib/components/SearchBar.svelte.test.ts` - 7 tests for search input
- `src/lib/components/TagInput.svelte.test.ts` - 6 tests for tag selector
- `vitest-setup-client.ts` - Added mocks for $app/state, preferences, recentSearches
- `vite.config.ts` - Configured coverage thresholds

## Test Coverage

| Category | Statements | Branches | Functions | Lines |
|----------|------------|----------|-----------|-------|
| Overall  | 11.9%      | 6.62%    | 23.72%    | 9.74% |
| Utils    | 100%       | 100%     | 100%      | 100%  |
| Threshold| 10%        | 5%       | 20%       | 8%    |

## Decisions Made

- **Coverage thresholds below current levels** - Set to prevent regression while allowing incremental improvement toward 80% target
- **Centralized mocks in setup file** - Avoids vi.mock hoisting issues in individual test files
- **vitest/browser import** - Updated from deprecated @vitest/browser/context

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

- **vi.mock hoisting** - Factory functions cannot use external variables; mocks moved to setup file
- **page.locator not available** - Used render() return value or page.getByRole/getByText instead
- **Deprecated import warning** - Fixed by using 'vitest/browser' instead of '@vitest/browser/context'

## User Setup Required

None - test infrastructure is fully configured.

## Next Phase Readiness

- Test infrastructure proven with both browser and node modes
- Component testing pattern documented for future test authors
- Coverage thresholds active to prevent regression
- Ready for E2E tests (09-03) and CI pipeline integration (09-04)

---
*Phase: 09-ci-pipeline*
*Completed: 2026-02-03*