# Calendar

**Test family:** `CAV`

Apply relevant search, filter, sort, action, and access item files in addition to the view-specific cases.

- **CAV-001** Day/week/month/agenda ranges include correct endpoints and adjacent-month days.
- **CAV-002** All-day, timed, overnight, multi-day, overlapping, zero-duration, and dense events render without misleading placement.
- **CAV-003** User/event/organization zone changes preserve the intended instant/local time.
- **CAV-004** DST transition, leap day, month/year boundary, week start, locale, and 12/24-hour display.
- **CAV-005** Create/move/resize via pointer and keyboard obey legal date/state rules and recover on failure.
- **CAV-006** Recurring series/exception/cancelled instance rendering and edits target correct scope.
- **CAV-007** Hidden/private events do not leak title/attendees through free-busy, tooltip, color, or count.

## Comprehensive per-item coverage

- **CAV-008** Render loading, empty, no-results, partial, ordinary, boundary-size, stale, offline, unauthorized, and error states distinctly.
- **CAV-009** Render values containing ASCII emoticons, emoji/ZWJ sequences, kaomoji, accents, mixed scripts, RTL, combining marks, invisible characters, and confusables.
- **CAV-010** Render null, empty, zero, false, unknown enum, deleted relation, long unbroken text, multiline text, media, links, and hostile markup canaries safely.
- **CAV-011** Verify visible rows/items/cards correspond exactly to the active query, filter, sort, group, page, tenant, and permission scope.
- **CAV-012** Change data while loading and while visible; avoid duplicates, omissions, jumping identity, stale totals, and interaction with the wrong item.
- **CAV-013** Select, focus, expand, edit, drag, open, and bulk-act using stable item identity even after reorder, virtualization, refresh, and pagination.
- **CAV-014** Deep-link, bookmark, share, refresh, duplicate tab, navigate back/forward, and restore; preserve only intended state and reject tampering.
- **CAV-015** Use owner, collaborator, restricted role, removed member, anonymous viewer, and another tenant; hidden data must not leak in counts, placeholders, caches, or timing.
- **CAV-016** Navigate and operate entirely by keyboard and screen reader; expose landmarks, headings, names, positions, selection, expansion, sort, errors, and live updates.
- **CAV-017** Test narrow/wide screens, portrait/landscape, 200% text, 400% reflow, high contrast, reduced motion, print, and touch targets.
- **CAV-018** Translate and lengthen text, switch RTL/LTR, locale sorting, number/date/currency formats, and time zone while view state exists.
- **CAV-019** Measure initial, incremental, sort/filter, scroll, selection, resize, and update latency at empty, ordinary, and supported maximum datasets.
- **CAV-020** Verify virtualization preserves focus, accessible position/count, selection, row height, sticky elements, and return position.
- **CAV-021** Retry after timeout, disconnect/reconnect, stale cache, replica lag, and partial response; show data age and never claim a false empty state.
- **CAV-022** Escape markup, URLs, filenames, formulas, and user content for the rendering context; links and actions must target the intended safe resource.
- **CAV-023** Change role, ownership, or record state between render and activation; reauthorize and refresh or reject the action clearly.
- **CAV-024** Export, print, copy, share, and screenshot the active view; preserve scope and formatting without exposing hidden fields or offscreen private data.
- **CAV-025** Verify analytics and audit distinguish viewed, loaded, exposed, selected, and acted-on items without collecting unnecessary content.
- **CAV-026** Save, rename, duplicate, reset, delete, and share view configuration; handle conflicts, invalid fields, schema changes, and revoked recipients.
- **CAV-027** Recover after renderer crash, corrupted saved state, invalid deep link, and unsupported browser capability with a usable default and diagnostic evidence.

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