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docs: document function coverage in deno coverage #3093

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docs: document function coverage in summary / HTML reports (2.8)
lunadogbot Apr 29, 2026
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docs: drop 2.8-specific framing for function coverage
lunadogbot May 2, 2026
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docs: deno fmt
lunadogbot May 2, 2026
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20 changes: 20 additions & 0 deletions runtime/reference/cli/coverage.md
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Expand Up @@ -128,6 +128,26 @@ console.log("This line is ignored");
console.log("This line is not ignored");
```

## Function coverage

The summary table and the HTML report include a **function coverage** column
alongside the branch and line columns:

```
----------------------------------
File | Branch % | Line % | Function %
----------------------------------
main.ts | 85.7 | 92.3 | 100.0
util.ts | 75.0 | 88.5 | 66.7
----------------------------------
all files | 80.0 | 90.5 | 83.3
----------------------------------
```

Function coverage measures the percentage of declared functions that were called
at least once during the test run. The same data is also available in the `lcov`
output.

## Output Formats

By default we support Deno's own coverage format - but you can also output
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