Coverage map
Real traffic, and which parts the tests cover.
Definition · Updated Nov 2, 2026
A coverage map draws production traffic as clusters sized by share and marks the test cases inside each, so clusters with no tests show as empty. Use it to check a golden set against real use.
Pay once. Every update included.
Live preview
Sample data: eight clusters, full refunds 31% with 46 cases, partial + coupon 14% with 0 cases
- Data shape
- A traffic share and a case count per cluster
- Good for
- Golden sets, eval coverage
- Avoid when
- There are no test cases
- Sizes
- XS, S, M and L, re-laid out from the data
Anatomy
Inspect it like the Figma file.
The same layers, names and tokens as the component. Select one to read its size, fill and style.
Layers
118 / Coverage map
- Layer
- gap · outline
- Type
- Ellipse
- Size
- 88 × 88
- Stroke
- status/warning
- Group
- Marks · 381
Layers
118 / Coverage map
- Layer
- gap · outline
- Type
- Ellipse
- Size
- 58 × 58
- Stroke
- status/warning
- Group
- Marks · 381
Layers
118 / Coverage map
- Layer
- gap · outline
- Type
- Ellipse
- Size
- 30 × 30
- Stroke
- status/warning
- Group
- Marks · 381
Sizes
Re-laid out, never scaled.
The same data at XS, S, M and L. Every size is redrawn from the data, so text and line weights never shrink.
M against S
Width360 px480 px
Plot328 px440 px
Labels3216
Marks381381
Height212 px246 px
Same tokens at every size: text styles, 1 px lines and mark radius stay put.
When to use
Where the tests are thin.
Three signs it fits, and three signs another type fits better.
Is coverage by cluster the point?
Two shares side by side.
Yes: Keep the coverage map
Code and Figma
One name in Figma and in code.
Every Figma property is a prop with the same name and values. One command installs it.
Figma
chart/118-coverage-map
npx shadcn add @chartory/coverage-mapimport { CoverageMap } from "@/components/chartory/coverage-map"import { goldenCoverage } from "./golden-coverage"export function GoldenCoverage() { return ( <CoverageMap data={goldenCoverage} size="m" legend={true} /> )}Hearth widget
Coverage map as a widget.
The chart in a Hearth card with a hero number and two blocks. One token set, light and dark.
EmberPreset
ChartoryDefault preset
Pick the blocks, the size and the preset for your own widget.
Read the Hearth widget docsFAQ
Coverage map questions.
What people ask before they put a coverage map in a dashboard.
Something else?
hello@usechartory.comIts share of traffic and its number of cases (Full refunds · 31% · 46 cases).
Production traffic, golden-set cases and clusters with no cases, named in the legend.
One data object in the sample’s shape: a traffic share and a case count per cluster. The docs page lists every field and links its JSON Schema; the sample data comes with the component, so you can start from it and swap in your own.
Series take the preset’s data colours in order, and states such as up, down or warning take its status colours. Change the preset in Figma or in code to recolour every chart at once.
XS, S, M and L, in light and dark. Each size is laid out again from the data, so text and lines keep their size.
Yes. It plays in when it scrolls into view, and when the data changes every mark moves from its old place to its new one. With reduced motion on, it does not move.
Yes. The Figma component comes with Figma and Complete, the React component with Code and Complete.
Ask for it by name. The MCP server tells the agent what data it needs and runs the same command: npx shadcn add @chartory/coverage-map. You review the diff.
Related types
Other ways to show relationship.
The same question, a different shape of answer. Every type ships in Figma and in code.
Same family
Relationship
17 types in Chartory answer this question.