skip-install.groovy

    new BaseJobBuilder(
        name: "pr-builder",
        description: 'Run unit tests when a pull request is submitted',
        ).build(this).with {
            GhUtils.ghPrWatcher(delegate,
                                [
                                    ghProject: 'foo/bar',
                                    ghHostname: 'github.com',
                                    ghAuthId: '<#########>',
                                    ghPermitAll: true,
                                    ghPrHooks: false,
                                    ghPrCron: '*/1 * * * *',
                                    ghPrOrgsList: 'foo',
                                    ghPrStatusContext: 'Run UI unit tests',
                                    ghPrResultMessage: [
                                      'SUCCESS': 'All tests passed',
                                      'ERROR': 'There was a problem running the tests',
                                      'FAILURE': 'At least one test failed',
                                    ]
                                ]
            )
            wrappers {
              nodejs('Node 8x Current')
            }
            steps {
                shell("""
                    #!/bin/bash

                    # Remove the current packages in case they changed
                    if [[ -n \$(git diff HEAD origin/dev -- package-lock.json) ]]; then
                        rm -rf node_modules
                        npm install
                    fi

                    grunt build
                    npm test
                """.stripIndent())
            }