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  1. Jenkins
  2. JENKINS-54652

[Groovy] Invalid switch case flow on empty "block"

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • Icon: Major Major
    • pipeline, workflow-cps-plugin

      In standard C-based language (such as Java, Groovy, ...), switch cases ends with break keyword. When there's no statement that break the flow, the next case is executed. For example:

      String value = "foo";
switch (value) {
    case "rab":
        System.out.println("rab");
    case "oof":
        System.out.println("oof");
        break;

    case "foo":
        System.out.println("foo");
    case "bar":
        System.out.println("bar");
        break;
}

      It must print "foobar".

      However, following pipeline prints: 1, null and 2.

      def switchCase(value) {
	switch (value) {
		case 'foo':
			return 1
		case 'bar':
		default:
			return 2
	}
}

pipeline {
	agent any

	options {
		buildDiscarder(logRotator(numToKeepStr:'5'))
		disableConcurrentBuilds()
		timestamps()
		skipDefaultCheckout()
	}

	stages {
		stage('Switch') {
			steps {
				echo "foo  -> '${switchCase('foo')}'"
				echo "bar  -> '${switchCase('bar')}'"
				echo "null -> '${switchCase(null)}'"
			}
		}
	}
}

      You can check its valid on Groovy through: https://groovyconsole.appspot.com/

            Unassigned Unassigned
            loganmzz Logan Mzz
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            4 Vote for this issue
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              Created:
              Updated: