src/test/groovy/PlusEqualsTest.groovy

/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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

import groovy.test.GroovyTestCase

class PlusEqualsTest extends GroovyTestCase {

    void testIntegerPlusEquals() {
        def x = 1
        def y = 2
        x += y
        
        assert x == 3
        
        y += 10
        
        assert y == 12
    }

    void testCharacterPlusEquals() {
        Character x = 1
        Character y = 2
        x += y
        
        assert x == 3
        
        y += 10
        
        assert y == 12
    }
    
    void testNumberPlusEquals() {
        def x = 1.2
        def y = 2
        x += y
        
        assert x == 3.2
        
        y += 10.1
        
        assert y == 12.1
    }
    
    void testStringPlusEquals() {
        def x = "bbc"
        def y = 2
        x += y
        
        assert x == "bbc2"
        
        def foo = "nice cheese"
        foo += " gromit"
        
        assert foo == "nice cheese gromit"
    }

    void testSortedSetPlusEquals() {
        def sortedSet = new TreeSet()
        sortedSet += 'abc'
        assertTrue 'sortedSet should have been a SortedSet',
                   sortedSet instanceof SortedSet
        sortedSet += ['def', 'ghi']
        assertTrue 'sortedSet should have been a SortedSet',
                   sortedSet instanceof SortedSet
        assertEquals 'sortedSet had wrong number of elements',
                     3, sortedSet.size()
    }
}