jdk/test/jdk/lambda/LambdaTranslationTest2.java - platform/libcore - Git at Google

 /*
  * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */

 import org.testng.annotations.Test;

 import java.util.ArrayList;
 import java.util.List;
 import java.util.function.Function;
 import java.util.function.Predicate;

 import static org.testng.Assert.assertEquals;
 import static org.testng.Assert.assertTrue;

 /**
  * LambdaTranslationTest2 -- end-to-end smoke tests for lambda evaluation
  */
 @Test
 public class LambdaTranslationTest2 {

     final String dummy = "dummy";

     public void testLambdas() {
         Predicate<String> isEmpty = s -> s.isEmpty();
         assertTrue(isEmpty.test(""));
         assertTrue(!isEmpty.test("foo"));

         Predicate<Object> oIsEmpty = s -> ((String) s).isEmpty();
         assertTrue(oIsEmpty.test(""));
         assertTrue(!oIsEmpty.test("foo"));

         Predicate<Object> alwaysTrue = o -> true;
         assertTrue(alwaysTrue.test(""));
         assertTrue(alwaysTrue.test(null));

         Predicate<Object> alwaysFalse = o -> false;
         assertTrue(!alwaysFalse.test(""));
         assertTrue(!alwaysFalse.test(null));

         // tests local capture
         String foo = "foo";
         Predicate<String> equalsFoo = s -> s.equals(foo);
         assertTrue(!equalsFoo.test(""));
         assertTrue(equalsFoo.test("foo"));

         // tests instance capture
         Predicate<String> equalsDummy = s -> s.equals(dummy);
         assertTrue(!equalsDummy.test(""));
         assertTrue(equalsDummy.test("dummy"));

         Function<Object, Object> ident = s -> s;

         assertEquals("blarf", ident.apply("blarf"));
         assertEquals("wooga", ident.apply("wooga"));
         assertTrue("wooga" == ident.apply("wooga"));

         // constant capture
         Function<Object, Object> prefixer = s -> "p" + s;
         assertEquals("pblarf", prefixer.apply("blarf"));
         assertEquals("pwooga", prefixer.apply("wooga"));

         // instance capture
         Function<Object, Object> prefixer2 = s -> dummy + s;
         assertEquals("dummyblarf", prefixer2.apply("blarf"));
         assertEquals("dummywooga", prefixer2.apply("wooga"));
     }

     interface Supplier<T> {
         T make();
     }

     interface StringFactory extends Supplier<String> { }

     interface StringFactory2 extends Supplier<String> {
         String make();
     }

     public void testBridges() {
         Supplier<String> of = () -> "y";
         Supplier<?> ef = () -> "z";

         assertEquals("y", of.make());
         assertEquals("y", ((Supplier<?>) of).make());
         assertEquals("y", ((Supplier) of).make());

         assertEquals("z", ef.make());
         assertEquals("z", ((Supplier) ef).make());
     }

     public void testBridgesImplicitSpecialization() {
         StringFactory sf = () -> "x";

         assertEquals("x", sf.make());
         assertEquals("x", ((Supplier<String>) sf).make());
         assertEquals("x", ((Supplier<?>) sf).make());
         assertEquals("x", ((Supplier) sf).make());
     }

     public void testBridgesExplicitSpecialization() {
         StringFactory2 sf = () -> "x";

         assertEquals("x", sf.make());
         assertEquals("x", ((Supplier<String>) sf).make());
         assertEquals("x", ((Supplier<?>) sf).make());
         assertEquals("x", ((Supplier) sf).make());
     }

     public void testSuperCapture() {
         class A {
             String make() { return "x"; }
         }

         class B extends A {
             void testSuperCapture() {
                 StringFactory sf = () -> super.make();
                 assertEquals("x", sf.make());
             }
         }

         new B().testSuperCapture();
     }

     interface WidenD {
         public String m(float a0, double a1);
     }

     interface WidenS {
         public String m(byte a0, short a1);
     }

     interface WidenI {
         public String m(byte a0, short a1, char a2, int a3);
     }

     interface WidenL {
         public String m(byte a0, short a1, char a2, int a3, long a4);
     }

     interface Box {
         public String m(byte a0, short a1, char a2, int a3, long a4, boolean a5, float a6, double a7);
     }

     static String pb(Byte a0, Short a1, Character a2, Integer a3, Long a4, Boolean a5, Float a6, Double a7) {
         return String.format("b%d s%d c%c i%d j%d z%b f%f d%f", a0, a1, a2, a3, a4, a5, a6, a7);
     }

     static String pwI1(int a0, int a1, int a2, int a3) {
         return String.format("b%d s%d c%d i%d", a0, a1, a2, a3);
     }

     static String pwI2(Integer a0, Integer a1, Integer a2, Integer a3) {
         return String.format("b%d s%d c%d i%d", a0, a1, a2, a3);
     }

     static String pwL1(long a0, long a1, long a2, long a3, long a4) {
         return String.format("b%d s%d c%d i%d j%d", a0, a1, a2, a3, a4);
     }

     static String pwL2(Long a0, Long a1, Long a2, Long a3, Long a4) {
         return String.format("b%d s%d c%d i%d j%d", a0, a1, a2, a3, a4);
     }

     static String pwS1(short a0, short a1) {
         return String.format("b%d s%d", a0, a1);
     }

     static String pwS2(Short a0, Short a1) {
         return String.format("b%d s%d", a0, a1);
     }

     static String pwD1(double a0, double a1) {
         return String.format("f%f d%f", a0, a1);
     }

     static String pwD2(Double a0, Double a1) {
         return String.format("f%f d%f", a0, a1);
     }

     public void testPrimitiveWidening() {
         WidenS ws1 = LambdaTranslationTest2::pwS1;
         assertEquals("b1 s2", ws1.m((byte) 1, (short) 2));

         WidenD wd1 = LambdaTranslationTest2::pwD1;
         assertEquals("f1.000000 d2.000000", wd1.m(1.0f, 2.0));

         WidenI wi1 = LambdaTranslationTest2::pwI1;
         assertEquals("b1 s2 c3 i4", wi1.m((byte) 1, (short) 2, (char) 3, 4));

         WidenL wl1 = LambdaTranslationTest2::pwL1;
         assertEquals("b1 s2 c3 i4 j5", wl1.m((byte) 1, (short) 2, (char) 3, 4, 5L));

         // @@@ TODO: clarify spec on widen+box conversion
     }

     interface Unbox {
         public String m(Byte a0, Short a1, Character a2, Integer a3, Long a4, Boolean a5, Float a6, Double a7);
     }

     static String pu(byte a0, short a1, char a2, int a3, long a4, boolean a5, float a6, double a7) {
         return String.format("b%d s%d c%c i%d j%d z%b f%f d%f", a0, a1, a2, a3, a4, a5, a6, a7);
     }

     public void testUnboxing() {
         Unbox u = LambdaTranslationTest2::pu;
         assertEquals("b1 s2 cA i4 j5 ztrue f6.000000 d7.000000", u.m((byte)1, (short) 2, 'A', 4, 5L, true, 6.0f, 7.0));
     }

     public void testBoxing() {
         Box b = LambdaTranslationTest2::pb;
         assertEquals("b1 s2 cA i4 j5 ztrue f6.000000 d7.000000", b.m((byte) 1, (short) 2, 'A', 4, 5L, true, 6.0f, 7.0));
     }

     static boolean cc(Object o) {
         return ((String) o).equals("foo");
     }

     public void testArgCastingAdaptation() {
         Predicate<String> p = LambdaTranslationTest2::cc;
         assertTrue(p.test("foo"));
         assertTrue(!p.test("bar"));
     }

     interface SonOfPredicate<T> extends Predicate<T> { }

     public void testExtendsSAM() {
         SonOfPredicate<String> p = s -> s.isEmpty();
         assertTrue(p.test(""));
         assertTrue(!p.test("foo"));
     }

     public void testConstructorRef() {
         Supplier<List<String>> lf = ArrayList<String>::new;
         List<String> list = lf.make();
         assertTrue(list instanceof ArrayList);
         assertTrue(list != lf.make());
         list.add("a");
         assertEquals("[a]", list.toString());
     }

     private static String privateMethod() {
         return "private";
     }

     public void testPrivateMethodRef() {
         Supplier<String> sf = LambdaTranslationTest2::privateMethod;
         assertEquals("private", sf.make());
     }

     private interface PrivateIntf {
         String make();
     }

     public void testPrivateIntf() {
         PrivateIntf p = () -> "foo";
         assertEquals("foo", p.make());
     }

     interface Op<T> {
         public T op(T a, T b);
     }

     public void testBoxToObject() {
         Op<Integer> maxer = Math::max;
         for (int i=-100000; i < 100000; i += 100)
             for (int j=-100000; j < 100000; j += 99) {
                 assertEquals((int) maxer.op(i,j), Math.max(i,j));
             }
     }

     protected static String protectedMethod() {
         return "protected";
     }

     public void testProtectedMethodRef() {
         Supplier<String> sf = LambdaTranslationTest2::protectedMethod;
         assertEquals("protected", sf.make());
     }

     class Inner1 {
         String m1() {
             return "Inner1.m1()";
         }

         class Inner2 {
             public String m1() {
                 return "Inner1.Inner2.m1()";
             }

             protected String m2() {
                 return "Inner1.Inner2.m2()";
             }

             String m3() {
                 return "Inner1.Inner2.m3()";
             }

             class Inner3<T> {
                 T t = null;
                 Inner3(T t) {
                     this.t = t;
                 }
                 T m1() {
                     return t;
                 }
             }
         }
     }

     public void testInnerClassMethodRef() {
         Supplier<String> fs = new Inner1()::m1;
         assertEquals("Inner1.m1()", fs.make());

         fs = new Inner1().new Inner2()::m1;
         assertEquals("Inner1.Inner2.m1()", fs.make());

         fs = new Inner1().new Inner2()::m2;
         assertEquals("Inner1.Inner2.m2()", fs.make());

         fs = new Inner1().new Inner2()::m3;
         assertEquals("Inner1.Inner2.m3()", fs.make());

         fs = new Inner1().new Inner2().new Inner3<String>("Inner1.Inner2.Inner3")::m1;
         assertEquals("Inner1.Inner2.Inner3", fs.make());

         Supplier<Integer> fsi = new Inner1().new Inner2().new Inner3<Integer>(100)::m1;
         assertEquals(100, (int)fsi.make());
     }
 }
	/*
	* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	import org.testng.annotations.Test;

	import java.util.ArrayList;
	import java.util.List;
	import java.util.function.Function;
	import java.util.function.Predicate;

	import static org.testng.Assert.assertEquals;
	import static org.testng.Assert.assertTrue;

	/**
	* LambdaTranslationTest2 -- end-to-end smoke tests for lambda evaluation
	*/
	@Test
	public class LambdaTranslationTest2 {

	final String dummy = "dummy";

	public void testLambdas() {
	Predicate<String> isEmpty = s -> s.isEmpty();
	assertTrue(isEmpty.test(""));
	assertTrue(!isEmpty.test("foo"));

	Predicate<Object> oIsEmpty = s -> ((String) s).isEmpty();
	assertTrue(oIsEmpty.test(""));
	assertTrue(!oIsEmpty.test("foo"));

	Predicate<Object> alwaysTrue = o -> true;
	assertTrue(alwaysTrue.test(""));
	assertTrue(alwaysTrue.test(null));

	Predicate<Object> alwaysFalse = o -> false;
	assertTrue(!alwaysFalse.test(""));
	assertTrue(!alwaysFalse.test(null));

	// tests local capture
	String foo = "foo";
	Predicate<String> equalsFoo = s -> s.equals(foo);
	assertTrue(!equalsFoo.test(""));
	assertTrue(equalsFoo.test("foo"));

	// tests instance capture
	Predicate<String> equalsDummy = s -> s.equals(dummy);
	assertTrue(!equalsDummy.test(""));
	assertTrue(equalsDummy.test("dummy"));

	Function<Object, Object> ident = s -> s;

	assertEquals("blarf", ident.apply("blarf"));
	assertEquals("wooga", ident.apply("wooga"));
	assertTrue("wooga" == ident.apply("wooga"));

	// constant capture
	Function<Object, Object> prefixer = s -> "p" + s;
	assertEquals("pblarf", prefixer.apply("blarf"));
	assertEquals("pwooga", prefixer.apply("wooga"));

	// instance capture
	Function<Object, Object> prefixer2 = s -> dummy + s;
	assertEquals("dummyblarf", prefixer2.apply("blarf"));
	assertEquals("dummywooga", prefixer2.apply("wooga"));
	}

	interface Supplier<T> {
	T make();
	}

	interface StringFactory extends Supplier<String> { }

	interface StringFactory2 extends Supplier<String> {
	String make();
	}

	public void testBridges() {
	Supplier<String> of = () -> "y";
	Supplier<?> ef = () -> "z";

	assertEquals("y", of.make());
	assertEquals("y", ((Supplier<?>) of).make());
	assertEquals("y", ((Supplier) of).make());

	assertEquals("z", ef.make());
	assertEquals("z", ((Supplier) ef).make());
	}

	public void testBridgesImplicitSpecialization() {
	StringFactory sf = () -> "x";

	assertEquals("x", sf.make());
	assertEquals("x", ((Supplier<String>) sf).make());
	assertEquals("x", ((Supplier<?>) sf).make());
	assertEquals("x", ((Supplier) sf).make());
	}

	public void testBridgesExplicitSpecialization() {
	StringFactory2 sf = () -> "x";

	assertEquals("x", sf.make());
	assertEquals("x", ((Supplier<String>) sf).make());
	assertEquals("x", ((Supplier<?>) sf).make());
	assertEquals("x", ((Supplier) sf).make());
	}

	public void testSuperCapture() {
	class A {
	String make() { return "x"; }
	}

	class B extends A {
	void testSuperCapture() {
	StringFactory sf = () -> super.make();
	assertEquals("x", sf.make());
	}
	}

	new B().testSuperCapture();
	}

	interface WidenD {
	public String m(float a0, double a1);
	}

	interface WidenS {
	public String m(byte a0, short a1);
	}

	interface WidenI {
	public String m(byte a0, short a1, char a2, int a3);
	}

	interface WidenL {
	public String m(byte a0, short a1, char a2, int a3, long a4);
	}

	interface Box {
	public String m(byte a0, short a1, char a2, int a3, long a4, boolean a5, float a6, double a7);
	}

	static String pb(Byte a0, Short a1, Character a2, Integer a3, Long a4, Boolean a5, Float a6, Double a7) {
	return String.format("b%d s%d c%c i%d j%d z%b f%f d%f", a0, a1, a2, a3, a4, a5, a6, a7);
	}

	static String pwI1(int a0, int a1, int a2, int a3) {
	return String.format("b%d s%d c%d i%d", a0, a1, a2, a3);
	}

	static String pwI2(Integer a0, Integer a1, Integer a2, Integer a3) {
	return String.format("b%d s%d c%d i%d", a0, a1, a2, a3);
	}

	static String pwL1(long a0, long a1, long a2, long a3, long a4) {
	return String.format("b%d s%d c%d i%d j%d", a0, a1, a2, a3, a4);
	}

	static String pwL2(Long a0, Long a1, Long a2, Long a3, Long a4) {
	return String.format("b%d s%d c%d i%d j%d", a0, a1, a2, a3, a4);
	}

	static String pwS1(short a0, short a1) {
	return String.format("b%d s%d", a0, a1);
	}

	static String pwS2(Short a0, Short a1) {
	return String.format("b%d s%d", a0, a1);
	}

	static String pwD1(double a0, double a1) {
	return String.format("f%f d%f", a0, a1);
	}

	static String pwD2(Double a0, Double a1) {
	return String.format("f%f d%f", a0, a1);
	}

	public void testPrimitiveWidening() {
	WidenS ws1 = LambdaTranslationTest2::pwS1;
	assertEquals("b1 s2", ws1.m((byte) 1, (short) 2));

	WidenD wd1 = LambdaTranslationTest2::pwD1;
	assertEquals("f1.000000 d2.000000", wd1.m(1.0f, 2.0));

	WidenI wi1 = LambdaTranslationTest2::pwI1;
	assertEquals("b1 s2 c3 i4", wi1.m((byte) 1, (short) 2, (char) 3, 4));

	WidenL wl1 = LambdaTranslationTest2::pwL1;
	assertEquals("b1 s2 c3 i4 j5", wl1.m((byte) 1, (short) 2, (char) 3, 4, 5L));

	// @@@ TODO: clarify spec on widen+box conversion
	}

	interface Unbox {
	public String m(Byte a0, Short a1, Character a2, Integer a3, Long a4, Boolean a5, Float a6, Double a7);
	}

	static String pu(byte a0, short a1, char a2, int a3, long a4, boolean a5, float a6, double a7) {
	return String.format("b%d s%d c%c i%d j%d z%b f%f d%f", a0, a1, a2, a3, a4, a5, a6, a7);
	}

	public void testUnboxing() {
	Unbox u = LambdaTranslationTest2::pu;
	assertEquals("b1 s2 cA i4 j5 ztrue f6.000000 d7.000000", u.m((byte)1, (short) 2, 'A', 4, 5L, true, 6.0f, 7.0));
	}

	public void testBoxing() {
	Box b = LambdaTranslationTest2::pb;
	assertEquals("b1 s2 cA i4 j5 ztrue f6.000000 d7.000000", b.m((byte) 1, (short) 2, 'A', 4, 5L, true, 6.0f, 7.0));
	}

	static boolean cc(Object o) {
	return ((String) o).equals("foo");
	}

	public void testArgCastingAdaptation() {
	Predicate<String> p = LambdaTranslationTest2::cc;
	assertTrue(p.test("foo"));
	assertTrue(!p.test("bar"));
	}

	interface SonOfPredicate<T> extends Predicate<T> { }

	public void testExtendsSAM() {
	SonOfPredicate<String> p = s -> s.isEmpty();
	assertTrue(p.test(""));
	assertTrue(!p.test("foo"));
	}

	public void testConstructorRef() {
	Supplier<List<String>> lf = ArrayList<String>::new;
	List<String> list = lf.make();
	assertTrue(list instanceof ArrayList);
	assertTrue(list != lf.make());
	list.add("a");
	assertEquals("[a]", list.toString());
	}

	private static String privateMethod() {
	return "private";
	}

	public void testPrivateMethodRef() {
	Supplier<String> sf = LambdaTranslationTest2::privateMethod;
	assertEquals("private", sf.make());
	}

	private interface PrivateIntf {
	String make();
	}

	public void testPrivateIntf() {
	PrivateIntf p = () -> "foo";
	assertEquals("foo", p.make());
	}

	interface Op<T> {
	public T op(T a, T b);
	}

	public void testBoxToObject() {
	Op<Integer> maxer = Math::max;
	for (int i=-100000; i < 100000; i += 100)
	for (int j=-100000; j < 100000; j += 99) {
	assertEquals((int) maxer.op(i,j), Math.max(i,j));
	}
	}

	protected static String protectedMethod() {
	return "protected";
	}

	public void testProtectedMethodRef() {
	Supplier<String> sf = LambdaTranslationTest2::protectedMethod;
	assertEquals("protected", sf.make());
	}

	class Inner1 {
	String m1() {
	return "Inner1.m1()";
	}

	class Inner2 {
	public String m1() {
	return "Inner1.Inner2.m1()";
	}

	protected String m2() {
	return "Inner1.Inner2.m2()";
	}

	String m3() {
	return "Inner1.Inner2.m3()";
	}

	class Inner3<T> {
	T t = null;
	Inner3(T t) {
	this.t = t;
	}
	T m1() {
	return t;
	}
	}
	}
	}

	public void testInnerClassMethodRef() {
	Supplier<String> fs = new Inner1()::m1;
	assertEquals("Inner1.m1()", fs.make());

	fs = new Inner1().new Inner2()::m1;
	assertEquals("Inner1.Inner2.m1()", fs.make());

	fs = new Inner1().new Inner2()::m2;
	assertEquals("Inner1.Inner2.m2()", fs.make());

	fs = new Inner1().new Inner2()::m3;
	assertEquals("Inner1.Inner2.m3()", fs.make());

	fs = new Inner1().new Inner2().new Inner3<String>("Inner1.Inner2.Inner3")::m1;
	assertEquals("Inner1.Inner2.Inner3", fs.make());

	Supplier<Integer> fsi = new Inner1().new Inner2().new Inner3<Integer>(100)::m1;
	assertEquals(100, (int)fsi.make());
	}
	}