Groovy example source code file (MemoizeBetweenTest.groovy)

This example Groovy source code file (MemoizeBetweenTest.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

abstractmemoizetestcase, abstractmemoizetestcase, closure, closure, memoizebetweentest, memoizebetweentest

The Groovy MemoizeBetweenTest.groovy source code

package org.codehaus.groovy.runtime.memoize

/**
 * @author Vaclav Pech
 */

public class MemoizeBetweenTest extends AbstractMemoizeTestCase {

    Closure buildMemoizeClosure(Closure cl) {
        cl.memoizeBetween(50, 100)
    }

    public void testParameters() {
        Closure cl = {}
        shouldFail(IllegalArgumentException) {
            cl.memoizeBetween(1, 0)
        }
        shouldFail(IllegalArgumentException) {
            cl.memoizeBetween(-2, -1)
        }
        shouldFail(IllegalArgumentException) {
            cl.memoizeBetween(-1, -1)
        }
    }

    public void testZeroCache() {
        def flag = false
        Closure cl = {
            flag = true
            it * 2
        }
        Closure mem = cl.memoizeBetween(0, 0)
        [1, 2, 3, 4, 5, 6].each {mem(it)}
        assert flag
        flag = false
        assert 12 == mem(6)
        assert flag
    }

    public void testLRUCache() {
        def flag = false
        Closure cl = {
            flag = true
            it * 2
        }
        Closure mem = cl.memoizeBetween(3, 3)
        [1, 2, 3, 4, 5, 6].each {mem(it)}
        assert flag
        flag = false
        assert 8 == mem(4)
        assert 10 == mem(5)
        assert 12 == mem(6)
        assert !flag
        assert 6 == mem(3)
        assert flag
        flag = false
        assert 10 == mem(5)
        assert 12 == mem(6)
        assert 6 == mem(3)
        assert !flag
        assert 8 == mem(4)
        assert flag

        flag = false
        assert 10 == mem(5)
        assert flag
    }
}