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---
name: Set a code coverage threshold with the Bun test runner
---
Bun's test runner supports built-in code coverage reporting via the `--coverage` flag.
```sh
$ bun test --coverage
test.test.ts:
✓ math > add [0.71ms]
✓ math > multiply [0.03ms]
✓ random [0.13ms]
-------------|---------|---------|-------------------
File | % Funcs | % Lines | Uncovered Line #s
-------------|---------|---------|-------------------
All files | 66.67 | 77.78 |
math.ts | 50.00 | 66.67 |
random.ts | 50.00 | 66.67 |
-------------|---------|---------|-------------------
3 pass
0 fail
3 expect() calls
```
---
To set a minimum coverage threshold, add the following line to your `bunfig.toml`. This requires that 90% of your codebase is covered by tests.
```toml
[test]
# to require 90% line-level and function-level coverage
coverageThreshold = 0.9
```
---
If your test suite does not meet this threshold, `bun test` will exit with a non-zero exit code to signal a failure.
```sh
$ bun test --coverage
<test output>
$ echo $?
1 # this is the exit code of the previous command
```
Different thresholds can be set for line-level and function-level coverage.
```toml
[test]
# to set different thresholds for lines and functions
coverageThreshold = { line = 0.5, function = 0.7 }
```
---
See [Docs > Test runner > Coverage](/docs/test/coverage) for complete documentation on code coverage reporting in Bun.
|
