Run unit test each time before the main script runs

JenkinsGroovyUnitTest

def RunUnitTests() {
  println("INFO: Running Unit Tests")
  
  def tests = [:]
  
  // define unit tests here
  tests["GetNodesByLabel"] = { 
    assert GetNodesByLabel().collect{it.name}.size() > 0
  }
  
  // end of define unit tests 
  
  
  tests.each {testName, testScript ->
    println("UNITTEST [${testName}]: Run...")
    testScript()
    println("UNITTEST [${testName}]: Passed")
  }
  
  println("INFO: End of Unit Tests, all tests should have passed")
}

RunUnitTests()



if(build.buildVariableResolver.resolve("HandleUnitTests") == "TestOnly"){
  println("WARNING: Run tests only, skip running main script")
  return 0
}


// Put main script here