src/test/groovy/DefaultParamClosureTest.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 DefaultParamClosureTest extends GroovyTestCase {

    void testDefaultParameters() {
        // Default parameters working for closures 
    def doSomething = { a, b = 'defB', c = 'defC' ->
            println "Called with a: ${a}, b ${b}, c ${c}"
            return a + "-" + b + "-" + c
        }

        def value = doSomething("X", "Y", "Z")
        assert value == "X-Y-Z"

        value = doSomething("X", "Y")
        assert value == "X-Y-defC"

        value = doSomething("X")
        assert value == "X-defB-defC"

        shouldFail { doSomething() }
    }

    void testDefaultTypedParameters() {
    // Handle typed parameters
    def doTypedSomething = { String a = 'defA', String b = 'defB', String c = 'defC' ->
            println "Called typed method with a: ${a}, b ${b}, c ${c}"
            return a + "-" + b + "-" + c
        }
    
        def value = doTypedSomething("X", "Y", "Z")
        assert value == "X-Y-Z"
        
        value = doTypedSomething("X", "Y")
        assert value == "X-Y-defC"
        
        value = doTypedSomething("X")
        assert value == "X-defB-defC"
        
        value = doTypedSomething()
        assert value == "defA-defB-defC"
    }

}