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

    void testExpandoProperty() {
        def foo = new Expando()

        foo.cheese = "Cheddar"
        foo.name = "Gromit"

        assert foo.cheese == "Cheddar"
        assert foo.name == "Gromit"

        assert foo.properties.size() == 2
    }

    void testExpandoMethods() {
        def foo = new Expando()

        foo.cheese = "Cheddar"
        foo.fullName = "Gromit"
        foo.nameLength = { return fullName.length() }
        foo.multiParam = { a, b, c -> println("Called with ${a}, ${b}, ${c}"); return a + b + c }

        assert foo.cheese == "Cheddar"
        assert foo.fullName == "Gromit"
        assert foo.nameLength() == 6, foo.nameLength()
        assert foo.multiParam(1, 2, 3) == 6

        // lets test using wrong number of parameters
        shouldFail { foo.multiParam(1) }
        shouldFail { foo.nameLength(1, 2) }
    }

    void testExpandoMethodCloning() {
        def foo = new Expando()
        def c = {
            assert delegate instanceof Expando
            1
        }
        foo.one = c

        assert foo.one() == 1
        assert !(c.delegate instanceof Expando)
    }

    void testExpandoConstructorAndToString() {
        def foo = new Expando(type: "sometype", value: 42)
        println foo
        assert foo.toString() == "{type=sometype, value=42}"
        assert "${foo}" == "{type=sometype, value=42}"
    }

    void testExpandoMethodOverrides() {
        def equals = { Object obj -> return obj.value == value }
        def foo = new Expando(type: "myfoo", value: 42, equals: equals)
        def bar = new Expando(type: "mybar", value: 43, equals: equals)
        def zap = new Expando(type: "myzap", value: 42, equals: equals)
        println(foo)

        assert foo.equals(bar) == false
        assert foo.equals(zap) == true

        def list = []
        list << foo
        list << bar
        println list

        assert list.contains(foo) == true
        assert list.contains(bar) == true
        assert list.contains(zap) == true
        assert list.indexOf(bar) == 1
        assert list.indexOf(foo) == 0

        println "hashCode: " + foo.hashCode()

        foo.hashCode = { return value }
        println("hashCode: " + foo.hashCode())

        assert foo.hashCode() == foo.value
        println("toString: " + foo.toString())

        foo.toString = { return "Type: ${type}, Value: ${value}" }
        println("toString: " + foo.toString())
        assert foo.toString() == "Type: myfoo, Value: 42"
    }

    void testArrayAccessOnThis() {
        def a = new FancyExpando([a: 1, b: 2])
        a.update([b: 5, a: 2])

        assert a.a == 2
        assert a.b == 5
    }

    void testExpandoClassProperty() {
        def e = new Expando()
        e.class = "hello world"

        assert e.class == "hello world"
    }
}

class FancyExpando extends Expando {
    FancyExpando(args) { super(args) }

    def update(args) {
        for (e in args) this[e.key] = e.value // using 'this'
    }

    String toString() { dump() }
}