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26 lines
987 B
Markdown
26 lines
987 B
Markdown
# Test Coverage Stats With Jest
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[Jest](https://facebook.github.io/jest/) is a delightful tool for JavaScript
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testing from Facebook. As your project evolves and you add tests (or perhaps
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choose to not add tests) you may wonder what kind of test coverage you have.
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What is the overall coverage? Which files are well covered and which are
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seriously lacking?
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Use the `--coverage` flag to get this information.
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```bash
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$ jest --coverage
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```
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After running all of your tests a table will be output to the terminal with
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a list of files and their respective coverage percentages in terms of
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statement, branch, function, and line coverage.
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```
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---------------------------|----------|----------|----------|----------|----------------|
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File | % Stmts | % Branch | % Funcs | % Lines |Uncovered Lines |
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---------------------------|----------|----------|----------|----------|----------------|
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```
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This can help guide you to what parts of your app may need more testing.
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