jdk8-mips64-public/langtools: test/tools/javac/lambda/methodReference/SamConversion.java@01c9d4161882 (annotated)

test/tools/javac/lambda/methodReference/SamConversion.java@01c9d4161882 (annotated)

test/tools/javac/lambda/methodReference/SamConversion.java

Sat, 17 Nov 2012 19:01:03 +0000

author: mcimadamore
date: Sat, 17 Nov 2012 19:01:03 +0000
changeset 1415: 01c9d4161882
child 1435: 9b26c96f5138
permissions: -rw-r--r--

8003280: Add lambda tests
Summary: Turn on lambda expression, method reference and default method support
Reviewed-by: jjg

 /*
  * Copyright (c) 2012, 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.
  */
 /**
  * @test
  * @bug 8003280
  * @summary Add lambda tests
  *   Test SAM conversion of method references in contexts of assignment, method/constructor argument,
  *           return statement, array initializer, lambda expression body, conditional expression and cast.
  * @compile SamConversion.java
  * @run main SamConversion
  */
 public class SamConversion {
     static int assertionCount = 0;
     static interface Foo {
         Integer m(int i);
     }
     static interface Bar {
         int m(Integer i) throws MyException;
     }
     private static void assertTrue(boolean b) {
         assertionCount++;
         if(!b)
             throw new AssertionError();
     }
     private static int test1(Foo foo) {
         return foo.m(1);
     }
     private static void test2(Bar bar, int result) {
         try {
             assertTrue(bar.m(1) == result);
         } catch (Exception e){
             assertTrue(false);
         }
     }
     private static Bar test3(int i) {
         switch (i) {
         case 0:
             return A::method1;
         case 1:
             return new A()::method2;
         case 2:
             return A::method3;
         case 3:
             return new A()::method4;
         case 4:
             return new A()::method5;
         case 5:
             return A::method6;
         default:
             return null;
         }
     }
     /**
      * Test SAM conversion of method reference in assignment context
      */
     private static void testAssignment() {
         Foo foo = A::method1; //static reference, parameter type matching and return type matching
         assertTrue(foo.m(1) == 2);
         foo = new A()::method2; //instance reference, parameter type unboxing and return type boxing
         assertTrue(foo.m(1) == 3);
         foo = A::method3; //static reference, parameter type matching and return type boxing
         assertTrue(foo.m(1) == 4);
         foo = new A()::method4; //instance reference, parameter type unboxing and return type matching
         assertTrue(foo.m(1) == 5);
         foo = new A()::method5; //instance reference, parameter type unboxing and return type matching
         assertTrue(foo.m(1) == 6);
         Bar bar = A::method1;
         try {
             assertTrue(bar.m(1) == 2);
         } catch (Exception e) {
             assertTrue(false);
         }
         bar = new A()::method2;
         try {
             assertTrue(bar.m(1) == 3);
         } catch (Exception e) {
             assertTrue(false);
         }
         bar = A::method3;
         try {
             assertTrue(bar.m(1) == 4);
         } catch (Exception e) {
             assertTrue(false);
         }
         bar = new A()::method4;
         try {
             assertTrue(bar.m(1) == 5);
         } catch (Exception e) {
             assertTrue(false);
         }
         bar = new A()::method5;
         try {
             assertTrue(bar.m(1) == 6);
         } catch (Exception e) {
             assertTrue(false);
         }
         bar = new A()::method6;
         try {
             bar.m(1);
             assertTrue(false);
         } catch (MyException e) {
         } catch (Exception e) {
             assertTrue(false);
         }
     }
     /**
      * Test SAM conversion of method reference in method/constructor argument context
      */
     private static void testMethodArgument() {
         assertTrue(test1(A::method1) == 2);
         assertTrue(test1(new A()::method2) == 3);
         assertTrue(test1(A::method3) == 4);
         assertTrue(test1(new A()::method4) == 5);
         assertTrue(test1(new A()::method5) == 6);
         test2(A::method1, 2);
         test2(new A()::method2, 3);
         test2(A::method3, 4);
         test2(new A()::method4, 5);
         test2(new A()::method5, 6);
         A a = new A(A::method1); //A(Foo f) called
         assertTrue(a.method2(1) == 11);
         assertTrue(a.method4(1) == 11);
         assertTrue(a.method5(1) == 11);
         A a2 = new A(new A()::method2); //A(Bar b) called
         assertTrue(a2.method2(1) == 12);
         assertTrue(a2.method4(1) == 12);
         assertTrue(a2.method5(1) == 12);
     }
     /**
      * Test SAM conversion of method reference in return statement context
      */
     private static void testReturnStatement() {
         Bar bar = test3(0);
         try {
             assertTrue(bar.m(1) == 2);
         } catch (Exception e) {
             assertTrue(false);
         }
         bar = test3(1);
         try {
             assertTrue(bar.m(1) == 3);
         } catch (Exception e) {
             assertTrue(false);
         }
         bar = test3(2);
         try {
             assertTrue(bar.m(1) == 4);
         } catch (Exception e) {
             assertTrue(false);
         }
         bar = test3(3);
         try {
             assertTrue(bar.m(1) == 5);
         } catch (Exception e) {
             assertTrue(false);
         }
         bar = test3(4);
         try {
             assertTrue(bar.m(1) == 6);
         } catch (Exception e) {
             assertTrue(false);
         }
         bar = test3(5);
         try {
             bar.m(1);
             assertTrue(false);
         } catch (MyException e) {
         } catch (Exception e) {
             assertTrue(false);
         }
     }
     /**
      * Test SAM conversion of method reference in cast context
      */
     private static void testCast() {
         assertTrue(((Foo)A::method1).m(1) == 2);
         try {
             assertTrue(((Bar)new A()::method2).m(1) == 3);
         } catch (Exception e) {
             assertTrue(false);
         }
     }
     /**
      * Test SAM conversion of method reference in array initializer context
      */
     private static void testArrayInitializer() {
         Object[] oarray = {"a", 1, (Foo)A::method3}; //last element need a cast
         Object[] oarray2 = {"a", 1, (Bar)new A()::method4}; //last element need a cast
         Foo[] farray = {A::method1, new A()::method2, A::method3, new A()::method4, new A()::method5};
         Bar[] barray = {A::method1, new A()::method2, A::method3, new A()::method4, new A()::method5, A::method6};
     }
     /**
      * Test SAM conversion of method reference in conditional expression context
      */
     private static void testConditionalExpression(boolean b) {
         Foo f = b ? A::method3 : new A()::method5;
         if(b)
             assertTrue(f.m(1) == 4);
         else
             assertTrue(f.m(1) == 6);
         Bar bar = b ? A::method1 : A::method6;
         if(b) {
             try {
                 assertTrue(bar.m(1) == 2);
             } catch (Exception e) {
                 assertTrue(false);
             }
         }
         else {
             try {
                 bar.m(1);
                 assertTrue(false);
             } catch (MyException e) {
             } catch (Exception e) {
                 assertTrue(false);
             }
         }
     }
     /**
      * Test SAM conversion of method reference in lambda expression body
      */
     private static void testLambdaExpressionBody() {
         Foo f = n -> ((Foo)A::method3).m(n);
         assertTrue(f.m(1) == 4);
         Bar b = n -> { return ((Foo)new A()::method5).m(n); };
         try {
             assertTrue(b.m(1) == 6);
         } catch (Exception e) {
             assertTrue(false);
         }
     }
     public static void main(String[] args) {
         testAssignment();
         testMethodArgument();
         testReturnStatement();
         testCast();
         testArrayInitializer();
         testConditionalExpression(true);
         testConditionalExpression(false);
         testLambdaExpressionBody();
         assertTrue(assertionCount == 38);
     }
     static class MyException extends Exception {}
     static class A {
         int value = 0;
         A() {
         }
         A(Foo f) {
             value = f.m(9);
         }
         A(Bar b) {
             try {
                 value = b.m(9);
             } catch (MyException e){}
         }
         static Integer method1(int n) {
             return n + 1;
         }
         int method2(Integer n) {
             return value == 0 ? n + 2 : n + value;
         }
         static int method3(int n) {
             return n + 3;
         }
         Integer method4(Integer n) {
             return value == 0 ? n + 4 : n + value;
         }
         Integer method5(Integer n) {
             return value == 0 ? new Integer(n + 5) : new Integer(n + value);
         }
         static int method6(Integer n) throws MyException{
             throw new MyException();
         }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

test/tools/javac/lambda/methodReference/SamConversion.java@01c9d4161882 (annotated)

test/tools/javac/lambda/methodReference/SamConversion.java