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Groovy example source code file (ClosureComparatorTest.groovy)

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

Java - Groovy tags/keywords

closurecomparator, closurecomparator, closurecomparatortest, closurecomparatortest, comparablefoo, comparablefoo, groovytestcase, groovytestcase

The Groovy ClosureComparatorTest.groovy source code

 * Copyright 2003-2011 the original author or authors.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package groovy

 * Tests for ClosureComparator
 * @author Alexey Verkhovsky
 * @version $Revision: 21515 $
class ClosureComparatorTest extends GroovyTestCase {

    public void testClosureComparatorForGroovyObjects() {

        def comparator = new ClosureComparator({ one, another ->

        def one = new ComparableFoo(5)
        def another = new ComparableFoo(-5)

        assertEquals(10,, another))
        assertEquals(0,, one))
        assertEquals(-10,, one))


    public void testClosureComparatorForNumericTypes() {

        def comparator = new ClosureComparator({ one, another ->
            one - another

        assertEquals(1,, Integer.MAX_VALUE - 1))
        assertEquals(0,, Double.MIN_VALUE))
        assertEquals(-1,, Long.MIN_VALUE + 1))


class ComparableFoo {
    long value

    public ComparableFoo(long theValue) {
        this.value = theValue

    def greaterThan(anotherFoo) {
        return (this.value - anotherFoo.value)

Other Groovy examples (source code examples)

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