8003280: Add lambda tests

Turn on lambda expression, method reference and default method support

Reviewed-by: jjg

langtools/test/tools/javac/lambda/LambdaConv01.java

@@ -0,0 +1,145 @@
+/*
+ * Copyright (c) 2011, 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
+ *  basic test for lambda conversion
+ * @author  Brian Goetz
+ * @author  Maurizio Cimadamore
+ * @run main LambdaConv01
+ */
+
+public class LambdaConv01 {
+
+    static int assertionCount = 0;
+
+    static void assertTrue(boolean cond) {
+        assertionCount++;
+        if (!cond)
+            throw new AssertionError();
+    }
+
+    interface IntToInt {
+      public int foo(int x);
+    }
+
+    interface IntToVoid {
+      public void foo(int x);
+    }
+
+    interface VoidToInt {
+      public int foo();
+    }
+
+    interface TU<T, U> {
+      public T foo(U u);
+    }
+
+    public static <T, U> T exec(TU<T, U> lambda, U x) {
+        return lambda.foo(x);
+    }
+
+    static {
+        //Assignment conversion:
+        VoidToInt f1 = ()-> 3;
+        assertTrue(3 == f1.foo());
+        //Covariant returns:
+        TU<Number, Integer> f2 = (Integer x) -> x;
+        assertTrue(3 == f2.foo(3));
+        //Method resolution with boxing:
+        int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3);
+        assertTrue(3 == res);
+        //Runtime exception transparency:
+        try {
+            LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null);
+        }
+        catch (RuntimeException e) {
+            assertTrue(true);
+        }
+    }
+
+    {
+        //Assignment conversion:
+        VoidToInt f1 = ()-> 3;
+        assertTrue(3 == f1.foo());
+        //Covariant returns:
+        TU<Number, Integer> f2 = (Integer x) -> x;
+        assertTrue(3 == f2.foo(3));
+        //Method resolution with boxing:
+        int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3);
+        assertTrue(3 == res);
+        //Runtime exception transparency:
+        try {
+            LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null);
+        }
+        catch (RuntimeException e) {
+            assertTrue(true);
+        }
+    }
+
+    public static void test1() {
+        //Assignment conversion:
+        VoidToInt f1 = ()-> 3;
+        assertTrue(3 == f1.foo());
+        //Covariant returns:
+        TU<Number, Integer> f2 = (Integer x) -> x;
+        assertTrue(3 == f2.foo(3));
+        //Method resolution with boxing:
+        int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3);
+        assertTrue(3 == res);
+        //Runtime exception transparency:
+        try {
+            LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null);
+        }
+        catch (RuntimeException e) {
+            assertTrue(true);
+        }
+    }
+
+    public void test2() {
+        //Assignment conversion:
+        VoidToInt f1 = ()-> 3;
+        assertTrue(3 == f1.foo());
+        //Covariant returns:
+        TU<Number, Integer> f2 = (Integer x) -> x;
+        assertTrue(3 == f2.foo(3));
+        //Method resolution with boxing:
+        int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3);
+        assertTrue(3 == res);
+        //Runtime exception transparency:
+        try {
+            LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null);
+        }
+        catch (RuntimeException e) {
+            assertTrue(true);
+        }
+    }
+
+    public static void main(String[] args) {
+        test1();
+        new LambdaConv01().test2();
+        assertTrue(assertionCount == 16);
+    }
+}