Contributing to Prettier Java

To get up and running, install the dependencies and run the full build:

yarn
yarn ci

You can also inspect the other available dev flows scripts:

yarn run

Testing your changes

If you would like to check the impact of your changes on a sample code, edit the scripts/single-printer-run/_input.java file and run

node scripts/update-test-output.js -single

The prettified code will be output in scripts/single-printer-run/_output.java.

It is also possible to prettify an entire repository by running the following command:

node scripts/update-test-ouput.js -repository relative/path/to/the/repository

It will then be output inside test-samples/repository-name.

To check the stability of the reformating, you can run several times Prettier with the -times flag (e.g. 5 times):

node scripts/update-test-output.js -single -times 5

If you run:

node scripts/update-test-ouput.js

It will simply update all the tests located in test/unit-test folder.

If you would like to run all the tests, simple use the following command:

yarn test

Formatting

The prettier-java source code is (unsurprisingly) formatted using prettier. Make sure to properly format the source code before committing by running:

yarn run format:fix

Unit Testing

All Unit tests in this project are implemented with the Mocha testing framework and the Chai assertion library.