src/test/groovy/CompareToTest.groovy

/*
 * 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 CompareToTest extends GroovyTestCase {

    void testCompareTo() {

        def a = 12
        def b = 20
        def c = 30
        
        def result = a <=> b
        assert result < 0

        result = a <=> 12
        assert result == 0

        result = c <=> b
        assert result > 0
        
        assert (a <=> b) < 0
        assert a <=> 12 == 0
        assert (c <=> b) > 0
    }

    void testNullCompares() {
    
        def a = 123
        def b = null
        
        def result = a <=> b
        assert result > 0
        
        result = b <=> a
        assert result < 0
        
        result = b <=> null
        assert result == 0
    }
}