# Chart

**Test family:** `CHR`

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

- **CHR-001** Chart answers a named question and source values reconcile with underlying data/table.
- **CHR-002** Axis origin, scale, interval, units, currency, percent denominator, and time zone do not mislead.
- **CHR-003** Zero, negative, null, missing interval, outlier, tiny difference, huge range, and one-point data are represented honestly.
- **CHR-004** Category colors/legend/order remain distinguishable without color and in high contrast.
- **CHR-005** Tooltip, keyboard exploration, screen-reader summary/data table, selection, zoom, and drilldown expose the same values.
- **CHR-006** Filters/date range/grouping update title, axes, data, totals, URL, and export together.
- **CHR-007** Responsive resize/print/export does not clip labels or substitute stale data.
- **CHR-008** Sampling/aggregation/smoothing/forecast/confidence intervals are disclosed and tested at boundaries.

## Comprehensive per-item coverage

- **CHR-009** Render loading, empty, no-results, partial, ordinary, boundary-size, stale, offline, unauthorized, and error states distinctly.
- **CHR-010** Render values containing ASCII emoticons, emoji/ZWJ sequences, kaomoji, accents, mixed scripts, RTL, combining marks, invisible characters, and confusables.
- **CHR-011** Render null, empty, zero, false, unknown enum, deleted relation, long unbroken text, multiline text, media, links, and hostile markup canaries safely.
- **CHR-012** Verify visible rows/items/cards correspond exactly to the active query, filter, sort, group, page, tenant, and permission scope.
- **CHR-013** Change data while loading and while visible; avoid duplicates, omissions, jumping identity, stale totals, and interaction with the wrong item.
- **CHR-014** Select, focus, expand, edit, drag, open, and bulk-act using stable item identity even after reorder, virtualization, refresh, and pagination.
- **CHR-015** Deep-link, bookmark, share, refresh, duplicate tab, navigate back/forward, and restore; preserve only intended state and reject tampering.
- **CHR-016** Use owner, collaborator, restricted role, removed member, anonymous viewer, and another tenant; hidden data must not leak in counts, placeholders, caches, or timing.
- **CHR-017** Navigate and operate entirely by keyboard and screen reader; expose landmarks, headings, names, positions, selection, expansion, sort, errors, and live updates.
- **CHR-018** Test narrow/wide screens, portrait/landscape, 200% text, 400% reflow, high contrast, reduced motion, print, and touch targets.
- **CHR-019** Translate and lengthen text, switch RTL/LTR, locale sorting, number/date/currency formats, and time zone while view state exists.
- **CHR-020** Measure initial, incremental, sort/filter, scroll, selection, resize, and update latency at empty, ordinary, and supported maximum datasets.
- **CHR-021** Verify virtualization preserves focus, accessible position/count, selection, row height, sticky elements, and return position.
- **CHR-022** Retry after timeout, disconnect/reconnect, stale cache, replica lag, and partial response; show data age and never claim a false empty state.
- **CHR-023** Escape markup, URLs, filenames, formulas, and user content for the rendering context; links and actions must target the intended safe resource.
- **CHR-024** Change role, ownership, or record state between render and activation; reauthorize and refresh or reject the action clearly.
- **CHR-025** Export, print, copy, share, and screenshot the active view; preserve scope and formatting without exposing hidden fields or offscreen private data.
- **CHR-026** Verify analytics and audit distinguish viewed, loaded, exposed, selected, and acted-on items without collecting unnecessary content.
- **CHR-027** Save, rename, duplicate, reset, delete, and share view configuration; handle conflicts, invalid fields, schema changes, and revoked recipients.
- **CHR-028** Recover after renderer crash, corrupted saved state, invalid deep link, and unsupported browser capability with a usable default and diagnostic evidence.

[Back to Views and visualizations index](../../views-visualization.md)
