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## Packages
We are using [yarn ](https://yarnpkg.com/en/docs/install ) 0.19.1.
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Run `yarn run` to see a list of available tasks.
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### Adding new packages
To add a new package, run
```sh
yarn add packageName
```
### Adding devDependency
```sh
yarn add --dev packageName
```
### Updating a package
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First, run
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```sh
yarn outdated
```
... to determine which packages may need upgrading.
We _really_ should not upgrade all packages at once, but, one at a time and make darn sure
to test.
To upgrade a single package named `packageName` :
```sh
yarn upgrade packageName
```
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## Testing
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Tests can be run via command line with `yarn test` , from within the `/ui` directory. For more detailed reporting, use `yarn test -- --reporters=verbose` .