groovy-core/src/test/groovy/SpreadDotTest.groovy

/*
 * Copyright 2003-2007 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

/**
 * Test for the spread dot operator "*.".
 *
 * For an example,
 *          list*.property
 * means
 *          list.collect { it?.property }
 *
 * @author  Pilho Kim
 * @author  Paul King
 */
public class SpreadDotTest extends GroovyTestCase {
    public void testSpreadDot() {
        def m1 = ["a":1, "b":2]
        def m2 = ["a":11, "b":22]
        def m3 = ["a":111, "b":222]
        def x = [m1,m2,m3]
        println x*.a
        println x*."a"
        assert x == [m1, m2, m3]

        def m4 = null
        x << m4
        println x*.a
        println x*."a"
        assert x == [m1, m2, m3, null]

        def d = new SpreadDotDemo()
        x << d
        println x*."a"
        assert x == [m1, m2, m3, null, d]

        def y = new SpreadDotDemo2()
        println y."a"
        println y.a

        x << y
        println x*."a"
        assert x == [m1, m2, m3, null, d, y]
    }

    public void testSpreadDot2() {
        def a = new SpreadDotDemo()
        def b = new SpreadDotDemo2()
        def x = [a, b]

        assert x*.fnB("1") == [a.fnB("1"), b.fnB("1")]
        assert [a,b]*.fnB() == [a.fnB(), b.fnB()]
    }

    public void testSpreadDotArrays() {
        def a = new SpreadDotDemo()
        def b = new SpreadDotDemo2()
        Object[] x = [a, b]

        assert x*.fnB("1") == [a.fnB("1"), b.fnB("1")]
        assert [a,b]*.fnB() == [a.fnB(), b.fnB()]

        int[] nums = [3, 4, 5]
        assert nums*.toString() == ['3', '4', '5']

        boolean[] answers = [true, false, true]
        assert answers*.toString() == ['true', 'false', 'true']

        String[] pets = ['ant', 'bear', 'camel']
        assert pets*.length() == nums
    }
}

class SpreadDotDemo {
    public java.util.Date getA() {
        return new Date()
    }
    public String fnB() {
        return "bb"
    }
    public String fnB(String m) {
        return "BB$m"
    }
}

class SpreadDotDemo2 {
    public String getAttribute(String key) {
        return "Attribute $key"
    }
    public String get(String key) {
        return getAttribute("Get $key")
    }
    public String fnB() {
        return "cc"
    }
    public String fnB(String m) {
        return "CC$m"
    }
}