Groovy example source code file (MultipleAssignmentTest.groovy)

This example Groovy source code file (MultipleAssignmentTest.groovy) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Groovy tags/keywords

compilabletestsupport, compilabletestsupport, multipleassignmenttest, multipleassignmenttest

The Groovy MultipleAssignmentTest.groovy source code

package gls.statements

import gls.CompilableTestSupport

class MultipleAssignmentTest extends CompilableTestSupport {

    void testList() {
        def list = [1, 2]
        def a, b

        (a, b) = list
        assert a == 1
        assert b == 2

        (a, b) = [3, 4]
        assert a == 3
        assert b == 4
    }

    void testArray() {
        def array = [1, 2] as int[]
        def a, b

        (a, b) = array
        assert a == 1
        assert b == 2
    }

    def foo() {[1, 2]}

    void testMethod() {
        def a, b

        (a, b) = foo()
        assert a == 1
        assert b == 2
    }

    void testMethodOverflow() {
        def a, b = 3

        (a) = foo()
        assert a == 1
        assert b == 3
    }

    void testMethodUnderflow() {
        def a, b, c = 4

        (a, b, c) = foo()
        assert a == 1
        assert b == 2
        assert c == null
    }
}