Groovy example source code file (GroovyTruthTest.groovy)

This example Groovy source code file (GroovyTruthTest.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

character, character, groovytestcase, groovytruthtest, groovytruthtest, object, object, stringbuffer, stringbuffer, true, vector

The Groovy GroovyTruthTest.groovy source code

/*
 * Copyright 2003-2010 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
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package groovy

class GroovyTruthTest extends GroovyTestCase {

    void testTruth() {
        testFalse null

        assertTrue Boolean.TRUE
        testTrue true
        testFalse Boolean.FALSE
        testFalse false

        testFalse ""
        testTrue "bla"
        testTrue "true"
        testTrue "TRUE"
        testTrue "false"
        testFalse ''
        testTrue 'bla'
        testTrue new StringBuffer('bla')
        testFalse new StringBuffer()

        testFalse Collections.EMPTY_LIST
        testFalse([])
        testTrue([1])
        testFalse([].toArray())

        testFalse [:]
        testTrue([bla: 'some value'])
        testTrue 1234
        testFalse 0
        testTrue 0.3f
        testTrue new Double(3.0f)
        testFalse 0.0f
        testTrue new Character((char) 1)
        testFalse new Character((char) 0)
    }

    void testPrimitiveArrayTruth() {
        testTrue([1] as byte[])
        testTrue([1] as short[])
        testTrue([1] as int[])
        testTrue([1] as long[])
        testTrue([1] as float[])
        testTrue([1] as double[])
        testTrue([true] as boolean[])
        testTrue([1] as char[])

        testFalse([] as byte[])
        testFalse([] as short[])
        testFalse([] as int[])
        testFalse([] as long[])
        testFalse([] as float[])
        testFalse([] as double[])
        testFalse([] as boolean[])
        testFalse([] as char[])
    }

    void testIteratorTruth() {
        testFalse([].iterator())
        testTrue([1].iterator())
    }

    void testEnumerationTruth() {
        def v = new Vector()
        testFalse(v.elements())
        v.add(new Object())
        testTrue(v.elements())
    }

    protected testTrue(someObj) {
        assertTrue someObj ? true : false
    }

    protected testFalse(someObj) {
        assertFalse someObj ? true : false
    }

}