354 lines
11 KiB
Java
354 lines
11 KiB
Java
/*
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* Copyright (c) 2012, 2021, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 8003639
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* @summary convert lambda testng tests to jtreg and add them
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* @run testng/othervm -Duser.language=en -Duser.country=US LambdaTranslationTest2
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*/
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import org.testng.annotations.Test;
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import java.util.ArrayList;
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import java.util.List;
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import static org.testng.Assert.assertEquals;
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import static org.testng.Assert.assertTrue;
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/**
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* LambdaTranslationTest2 -- end-to-end smoke tests for lambda evaluation
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*/
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@Test
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public class LambdaTranslationTest2 {
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final String dummy = "dummy";
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public void testLambdas() {
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TPredicate<String> isEmpty = s -> s.isEmpty();
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assertTrue(isEmpty.test(""));
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assertTrue(!isEmpty.test("foo"));
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TPredicate<Object> oIsEmpty = s -> ((String) s).isEmpty();
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assertTrue(oIsEmpty.test(""));
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assertTrue(!oIsEmpty.test("foo"));
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TPredicate<Object> alwaysTrue = o -> true;
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assertTrue(alwaysTrue.test(""));
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assertTrue(alwaysTrue.test(null));
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TPredicate<Object> alwaysFalse = o -> false;
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assertTrue(!alwaysFalse.test(""));
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assertTrue(!alwaysFalse.test(null));
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// tests local capture
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String foo = "foo";
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TPredicate<String> equalsFoo = s -> s.equals(foo);
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assertTrue(!equalsFoo.test(""));
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assertTrue(equalsFoo.test("foo"));
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// tests instance capture
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TPredicate<String> equalsDummy = s -> s.equals(dummy);
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assertTrue(!equalsDummy.test(""));
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assertTrue(equalsDummy.test("dummy"));
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TMapper<Object, Object> ident = s -> s;
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assertEquals("blarf", ident.map("blarf"));
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assertEquals("wooga", ident.map("wooga"));
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assertTrue("wooga" == ident.map("wooga"));
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// constant capture
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TMapper<Object, Object> prefixer = s -> "p" + s;
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assertEquals("pblarf", prefixer.map("blarf"));
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assertEquals("pwooga", prefixer.map("wooga"));
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// instance capture
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TMapper<Object, Object> prefixer2 = s -> dummy + s;
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assertEquals("dummyblarf", prefixer2.map("blarf"));
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assertEquals("dummywooga", prefixer2.map("wooga"));
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}
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interface Factory<T> {
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T make();
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}
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interface StringFactory extends Factory<String> { }
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interface StringFactory2 extends Factory<String> {
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String make();
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}
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public void testBridges() {
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Factory<String> of = () -> "y";
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Factory<?> ef = () -> "z";
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assertEquals("y", of.make());
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assertEquals("y", ((Factory<?>) of).make());
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assertEquals("y", ((Factory) of).make());
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assertEquals("z", ef.make());
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assertEquals("z", ((Factory) ef).make());
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}
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public void testBridgesImplicitSpecialization() {
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StringFactory sf = () -> "x";
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assertEquals("x", sf.make());
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assertEquals("x", ((Factory<String>) sf).make());
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assertEquals("x", ((Factory<?>) sf).make());
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assertEquals("x", ((Factory) sf).make());
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}
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public void testBridgesExplicitSpecialization() {
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StringFactory2 sf = () -> "x";
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assertEquals("x", sf.make());
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assertEquals("x", ((Factory<String>) sf).make());
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assertEquals("x", ((Factory<?>) sf).make());
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assertEquals("x", ((Factory) sf).make());
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}
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public void testSuperCapture() {
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class A {
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String make() { return "x"; }
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}
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class B extends A {
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void testSuperCapture() {
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StringFactory sf = () -> super.make();
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assertEquals("x", sf.make());
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}
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}
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new B().testSuperCapture();
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}
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interface WidenD {
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public String m(float a0, double a1);
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}
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interface WidenS {
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public String m(byte a0, short a1);
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}
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interface WidenI {
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public String m(byte a0, short a1, char a2, int a3);
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}
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interface WidenL {
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public String m(byte a0, short a1, char a2, int a3, long a4);
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}
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interface Box {
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public String m(byte a0, short a1, char a2, int a3, long a4, boolean a5, float a6, double a7);
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}
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static String pb(Byte a0, Short a1, Character a2, Integer a3, Long a4, Boolean a5, Float a6, Double a7) {
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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);
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}
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static String pwI1(int a0, int a1, int a2, int a3) {
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return String.format("b%d s%d c%d i%d", a0, a1, a2, a3);
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}
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static String pwI2(Integer a0, Integer a1, Integer a2, Integer a3) {
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return String.format("b%d s%d c%d i%d", a0, a1, a2, a3);
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}
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static String pwL1(long a0, long a1, long a2, long a3, long a4) {
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return String.format("b%d s%d c%d i%d j%d", a0, a1, a2, a3, a4);
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}
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static String pwL2(Long a0, Long a1, Long a2, Long a3, Long a4) {
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return String.format("b%d s%d c%d i%d j%d", a0, a1, a2, a3, a4);
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}
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static String pwS1(short a0, short a1) {
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return String.format("b%d s%d", a0, a1);
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}
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static String pwS2(Short a0, Short a1) {
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return String.format("b%d s%d", a0, a1);
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}
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static String pwD1(double a0, double a1) {
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return String.format("f%f d%f", a0, a1);
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}
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static String pwD2(Double a0, Double a1) {
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return String.format("f%f d%f", a0, a1);
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}
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public void testPrimitiveWidening() {
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WidenS ws1 = LambdaTranslationTest2::pwS1;
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assertEquals("b1 s2", ws1.m((byte) 1, (short) 2));
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WidenD wd1 = LambdaTranslationTest2::pwD1;
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assertEquals("f1.000000 d2.000000", wd1.m(1.0f, 2.0));
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WidenI wi1 = LambdaTranslationTest2::pwI1;
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assertEquals("b1 s2 c3 i4", wi1.m((byte) 1, (short) 2, (char) 3, 4));
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WidenL wl1 = LambdaTranslationTest2::pwL1;
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assertEquals("b1 s2 c3 i4 j5", wl1.m((byte) 1, (short) 2, (char) 3, 4, 5L));
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// @@@ TODO: clarify spec on widen+box conversion
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}
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interface Unbox {
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public String m(Byte a0, Short a1, Character a2, Integer a3, Long a4, Boolean a5, Float a6, Double a7);
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}
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static String pu(byte a0, short a1, char a2, int a3, long a4, boolean a5, float a6, double a7) {
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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);
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}
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public void testUnboxing() {
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Unbox u = LambdaTranslationTest2::pu;
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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));
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}
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public void testBoxing() {
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Box b = LambdaTranslationTest2::pb;
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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));
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}
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static boolean cc(Object o) {
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return ((String) o).equals("foo");
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}
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public void testArgCastingAdaptation() {
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TPredicate<String> p = LambdaTranslationTest2::cc;
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assertTrue(p.test("foo"));
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assertTrue(!p.test("bar"));
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}
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interface SonOfPredicate<T> extends TPredicate<T> { }
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public void testExtendsSAM() {
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SonOfPredicate<String> p = s -> s.isEmpty();
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assertTrue(p.test(""));
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assertTrue(!p.test("foo"));
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}
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public void testConstructorRef() {
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Factory<List<String>> lf = ArrayList<String>::new;
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List<String> list = lf.make();
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assertTrue(list instanceof ArrayList);
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assertTrue(list != lf.make());
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list.add("a");
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assertEquals("[a]", list.toString());
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}
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private static String privateMethod() {
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return "private";
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}
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public void testPrivateMethodRef() {
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Factory<String> sf = LambdaTranslationTest2::privateMethod;
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assertEquals("private", sf.make());
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}
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private interface PrivateIntf {
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String make();
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}
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public void testPrivateIntf() {
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PrivateIntf p = () -> "foo";
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assertEquals("foo", p.make());
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}
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interface Op<T> {
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public T op(T a, T b);
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}
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public void testBoxToObject() {
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Op<Integer> maxer = Math::max;
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for (int i=-100000; i < 100000; i += 100)
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for (int j=-100000; j < 100000; j += 99) {
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assertEquals((int) maxer.op(i,j), Math.max(i,j));
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}
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}
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protected static String protectedMethod() {
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return "protected";
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}
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public void testProtectedMethodRef() {
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Factory<String> sf = LambdaTranslationTest2::protectedMethod;
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assertEquals("protected", sf.make());
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}
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class Inner1 {
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String m1() {
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return "Inner1.m1()";
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}
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class Inner2 {
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public String m1() {
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return "Inner1.Inner2.m1()";
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}
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protected String m2() {
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return "Inner1.Inner2.m2()";
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}
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String m3() {
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return "Inner1.Inner2.m3()";
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}
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class Inner3<T> {
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T t = null;
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Inner3(T t) {
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this.t = t;
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}
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T m1() {
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return t;
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}
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}
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}
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}
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public void testInnerClassMethodRef() {
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Factory<String> fs = new Inner1()::m1;
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assertEquals("Inner1.m1()", fs.make());
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fs = new Inner1().new Inner2()::m1;
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assertEquals("Inner1.Inner2.m1()", fs.make());
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fs = new Inner1().new Inner2()::m2;
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assertEquals("Inner1.Inner2.m2()", fs.make());
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fs = new Inner1().new Inner2()::m3;
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assertEquals("Inner1.Inner2.m3()", fs.make());
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fs = new Inner1().new Inner2().new Inner3<String>("Inner1.Inner2.Inner3")::m1;
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assertEquals("Inner1.Inner2.Inner3", fs.make());
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Factory<Integer> fsi = new Inner1().new Inner2().new Inner3<Integer>(100)::m1;
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assertEquals(100, (int)fsi.make());
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}
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}
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