

Groovy example source code file (ClosureComposeTest.groovy)
The Groovy ClosureComposeTest.groovy source code/* * Copyright 20032010 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/LICENSE2.0 * * 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 /** * @author Paul King */ class ClosureComposeTest extends GroovyTestCase { void testComposeMultiply() { def twice = { a > a * 2 } def thrice = { a > a * 3 } def times6 = twice >> thrice assert times6(3) == 18 } void testReverseComposeAndCallShortcut() { def twice = { a > a * 2 } def thrice = { a > a * 3 } assert twice << thrice << 3 == 18 } void testComposeAndLonghand() { def twice = { a > a * 2 } def inc = { b > b + 1 } def f = inc >> twice def g = { x > twice(inc(x)) } assert f(10) == 22 assert g(10) == 22 } // GROOVY4512 void testClosureCompositionInstance() { def inst = new ComposeTestHelper() assert inst.composedA.call() == 42 assert inst.composedA() == 42 assert inst.composedB.call(3) == 122 assert inst.composedB(3) == 122 } void testComposeWithMethodClosure() { def s2c = { it.chars[0] } def p = Integer.&toHexString >> s2c >> Character.&toUpperCase assert p(15) == 'F' } void testComposeWithMultipleArgs() { def multiply = { a, b > a * b } def identity = { a > [a, a] } def sq = identity >> multiply assert (1..5).collect { sq(it) } == [1, 4, 9, 16, 25] } void testReverseCompositionWithMultipleArgs() { def multiply = { a, b > a * b } def identity = { a > [a, a] } def sq = multiply << identity assert (1..5).collect { sq(it) } == [1, 4, 9, 16, 25] } void testComposeWithCurriedClosures() { def add3 = { a, b, c > a + b + c } def add2plus10 = add3.curry(10) def multBoth = { a, b, c > [a * c, b * c] } def twiceBoth = multBoth.rcurry(2) def twiceBothPlus10 = twiceBoth >> add2plus10 assert twiceBothPlus10(5, 10) == 40 } class ComposeTestHelper { def closure1 = { 40 } def closure2 = { it * 40 } def closure3 = { it + 2 } def composedA = closure1 >> closure3 def composedB = closure2 >> closure3 } } Other Groovy examples (source code examples)Here is a short list of links related to this Groovy ClosureComposeTest.groovy source code file: 
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