jaroslav@1639: /**
jaroslav@1639:  * Back 2 Browser Bytecode Translator
jaroslav@1639:  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
jaroslav@1639:  *
jaroslav@1639:  * This program is free software: you can redistribute it and/or modify
jaroslav@1639:  * it under the terms of the GNU General Public License as published by
jaroslav@1639:  * the Free Software Foundation, version 2 of the License.
jaroslav@1639:  *
jaroslav@1639:  * This program is distributed in the hope that it will be useful,
jaroslav@1639:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
jaroslav@1639:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
jaroslav@1639:  * GNU General Public License for more details.
jaroslav@1639:  *
jaroslav@1639:  * You should have received a copy of the GNU General Public License
jaroslav@1639:  * along with this program. Look for COPYING file in the top folder.
jaroslav@1639:  * If not, see http://opensource.org/licenses/GPL-2.0.
jaroslav@1639:  */
jaroslav@1639: package org.apidesign.bck2brwsr.vm8;
jaroslav@1639: 
jaroslav@1692: import java.util.ArrayList;
jaroslav@1692: import java.util.Arrays;
jaroslav@1692: import java.util.List;
jaroslav@1692: import java.util.concurrent.Callable;
jaroslav@1680: import org.apidesign.bck2brwsr.vmtest.Compare;
jaroslav@1680: import org.apidesign.bck2brwsr.vmtest.VMTest;
jaroslav@1680: import org.testng.annotations.Factory;
jaroslav@1639: 
jaroslav@1639: /**
jaroslav@1639:  *
jaroslav@1639:  * @author Jaroslav Tulach <jtulach@netbeans.org>
jaroslav@1639:  */
jaroslav@1692: public class LambdasTest extends LambdasSuper {
jaroslav@1680:     @Compare public String StringverifyJSTime() throws Exception {
jaroslav@1680:         return Lambdas.compound();
jaroslav@1639:     }
jaroslav@1692: 
jaroslav@1692:     @Compare
jaroslav@1692:     public int canCallLambda() {
jaroslav@1692:         int[] arr = {0};
jaroslav@1692:         Runnable incr = () -> {
jaroslav@1692:             arr[0]++;
jaroslav@1692:         };
jaroslav@1692:         incr.run();
jaroslav@1692:         return arr[0];
jaroslav@1692:     }
jaroslav@1692: 
jaroslav@1692:     @Compare
jaroslav@1692:     public String lambdaReturnsString() throws Exception {
jaroslav@1692:         Callable<String> lambda = () -> "Hello World!";
jaroslav@1692:         return lambda.call();
jaroslav@1692:     }
jaroslav@1692: 
jaroslav@1692:     private interface Convertor<P, R> {
jaroslav@1692: 
jaroslav@1692:         public R convert(P value);
jaroslav@1692:     }
jaroslav@1692: 
jaroslav@1692:     @Compare
jaroslav@1692:     public int convertToLength() {
jaroslav@1692:         Convertor<String, Integer> lambda = (String s) -> s.getBytes().length;
jaroslav@1692:         return lambda.convert("buu");
jaroslav@1692:     }
jaroslav@1692: 
jaroslav@1692:     private int meaningOfWorld = 0;
jaroslav@1692: 
jaroslav@1692:     @Compare
jaroslav@1692:     public int accessToInstanceVar() {
jaroslav@1692:         Runnable lambda = () -> {
jaroslav@1692:             meaningOfWorld = 42;
jaroslav@1692:         };
jaroslav@1692:         lambda.run();
jaroslav@1692:         return meaningOfWorld;
jaroslav@1692:     }
jaroslav@1692: 
jaroslav@1692:     @Compare
jaroslav@1692:     public int localMeaningOfWorld() {
jaroslav@1692:         int[] meansOfWorld = new int[1];
jaroslav@1692:         Runnable lambda = () -> {
jaroslav@1692:             meansOfWorld[0] = 42;
jaroslav@1692:         };
jaroslav@1692:         lambda.run();
jaroslav@1692:         return meansOfWorld[0];
jaroslav@1692:     }
jaroslav@1692: 
jaroslav@1692:     @Compare
jaroslav@1692:     public int useLocalVars() throws Exception {
jaroslav@1692:         boolean bool = true;
jaroslav@1692:         byte b = 2;
jaroslav@1692:         short s = 3;
jaroslav@1692:         int i = 4;
jaroslav@1692:         long l = 5;
jaroslav@1692:         float f = 6;
jaroslav@1692:         double d = 7;
jaroslav@1692:         char c = 8;
jaroslav@1692:         Callable<Integer> lambda = () -> (int) ((bool ? 1 : 0) + b + s + i + l + f + d + c);
jaroslav@1692:         return lambda.call();
jaroslav@1692:     }
jaroslav@1692: 
jaroslav@1692:     @Compare
jaroslav@1692:     public String callVirtualMethod() throws Exception {
jaroslav@1692:         String foo = "foo";
jaroslav@1692:         Callable<String> ref = foo::toUpperCase;
jaroslav@1692:         return ref.call();
jaroslav@1692:     }
jaroslav@1692: 
jaroslav@1692:     @Compare
jaroslav@1692:     public int callInterfaceMethod() throws Exception {
jaroslav@1692:         List<String> foos = Arrays.asList("foo");
jaroslav@1692:         Callable<Integer> ref = foos::size;
jaroslav@1692:         return ref.call();
jaroslav@1692:     }
jaroslav@1692: 
jaroslav@1692:     @Compare
jaroslav@1692:     public long callStaticMethod() throws Exception {
jaroslav@1692:         long expected = System.currentTimeMillis();
jaroslav@1692:         Callable<Long> ref = System::currentTimeMillis;
jaroslav@1692:         return ref.call() & ~0xffff;
jaroslav@1692:     }
jaroslav@1692: 
jaroslav@1692:     @Compare
jaroslav@1692:     public String callConstructor() throws Exception {
jaroslav@1692:         Callable<List<String>> ref = ArrayList<String>::new;
jaroslav@1692:         return ref.call().toString();
jaroslav@1692:     }
jaroslav@1692: 
jaroslav@1692:     @Compare
jaroslav@1692:     public String superMethodOverridenByThis() throws Exception {
jaroslav@1692:         Callable<String> ref = super::inheritedMethod;
jaroslav@1692:         return ref.call();
jaroslav@1692:     }
jaroslav@1692: 
jaroslav@1692:     @Override
jaroslav@1692:     String inheritedMethod() {
jaroslav@1692:         return "overridden version";
jaroslav@1692:     }
jaroslav@1692: 
jaroslav@1692:     @Compare
jaroslav@1692:     public String referencePrivateClassMethod() throws Exception {
jaroslav@1692:         StringBuilder sb = new StringBuilder();
jaroslav@1692: 
jaroslav@1692:         Callable<String> ref1 = LambdasTest::privateClassMethod;
jaroslav@1692:         sb.append(ref1.call());
jaroslav@1692: 
jaroslav@1692:         Callable<String> ref2 = this::privateInstanceMethod;
jaroslav@1692:         sb.append("\n").append(ref2.call());
jaroslav@1692: 
jaroslav@1692:         // Normal method calls should still work after our magic
jaroslav@1692:         // of making them them accessible from the lambda classes.
jaroslav@1692:         sb.append("\n").append(privateClassMethod());
jaroslav@1692:         sb.append("\n").append(privateInstanceMethod());
jaroslav@1692: 
jaroslav@1692:         return sb.toString();
jaroslav@1692:     }
jaroslav@1692: 
jaroslav@1692:     private String privateInstanceMethod() {
jaroslav@1692:         return "foo";
jaroslav@1692:     }
jaroslav@1692: 
jaroslav@1692:     private static String privateClassMethod() {
jaroslav@1692:         return "foo";
jaroslav@1692:     }
jaroslav@1692: 
jaroslav@1692:     private String unrelatedPrivateMethod() {
jaroslav@1692:         return "foo";
jaroslav@1692:     }
jaroslav@1639:     
jaroslav@1680:     @Factory public static Object[] create() {
jaroslav@1680:         return VMTest.create(LambdasTest.class);
jaroslav@1639:     }
jaroslav@1639: }
jaroslav@1639: