Groovy example source code file (PostfixTest.groovy)

This example Groovy source code file (PostfixTest.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

groovytestcase, groovytestcase, postfixtest, postfixtest

The Groovy PostfixTest.groovy source code

package groovy

class PostfixTest extends GroovyTestCase {

    void testIntegerPostfix() {
        def x = 1
        
        def y = x++
        
        assert y == 1
        assert x == 2
        
        assert x++ == 2
        assert x == 3
    }
    
    void testDoublePostfix() {
        def x = 1.2
        def y = x++

        assert y == 1.2
        assert x++ == 2.2
        assert x == 3.2
    }

     void testStringPostfix() {
         def x = "bbc"
         x++

         assert x == "bbd"

         def y = "bbc"++
         assert y == "bbc"
    }
    
    
    void testArrayPostfix() {
        int[] i = [1]
        
        def y = i[0]++
        
        assert y == 1
        assert i[0]++ == 2
        assert i[0] == 3
    }
    
    void testConstantPostFix() {
        assert 1 == 1++
    }

    def valueReturned() { 0 }

    void testFunctionPostfix() {
        def z = (valueReturned())++

        assert z == 0
    }

    void testPrefixAndPostfix() {
        def u = 0
        
        assert -1 == -- u --
        assert 0 == ++ u ++
        assert 0 == u
        assert 0 == (u++)++
        assert 1 == u
    }
}