node('master') {
    def extWorkspace = exwsAllocate 'dp1'
    exws(extWorkspace) {
        stage "Checkout ${GIT_BRANCH}"
        git ...


        stage 'Test execution'
        def TEST_CONFIG = "production"
        def tests = ['test_1',
                     'test_2',

        ]
        try {
            def branches = [:]
            for (int i = 0; i < tests.size(); i++) {

                def s = tests.get(i)
                def stepName = "running ${s}"

                branches[stepName] = runTestSuite(s, TEST_CONFIG)
            }

            parallel branches
        } catch (all) {

        } finally {
            stage 'Test results parsing'
            step([$class: 'JUnitResultArchiver', testResults: 'junit/*.xml'])
        }
    }
}

def runTestSuite(test_suite, config) {
    return {
        node('master') {
            build job: 'Run test suite',
                    parameters: [[$class: 'StringParameterValue', name: 'test', value: test_suite],
                                 [$class: 'StringParameterValue', name: 'TEST_CONFIG', value: config],
                                 [$class: 'StringParameterValue', name: 'UPSTREAM_BUILD_NUMBER', value: currentBuild.number.toString()],
                    ]
        }
    }
}

node('master') {
    def customPath = "tmp/TEST2/${UPSTREAM_BUILD_NUMBER}"
    def extWorkspace = exwsAllocate diskPoolId: 'dp1', path: customPath


    exws(extWorkspace) {

        currentBuild.displayName = "branch: ${GIT_BRANCH}, config: prod, test: ${test}"

        stage 'Test execution'
        sh "py.test ... ${test}"

    }
}