8003280: Add lambda tests

Turn on lambda expression, method reference and default method support

Reviewed-by: jjg

langtools/test/tools/javac/lambda/lambdaExpression/LambdaTest2.java

@@ -0,0 +1,118 @@
+/*
+ * 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
+ *   Test lambda expressions for different method signatures (parameter and return type)
+ * @compile LambdaTest2.java
+ * @run main LambdaTest2
+ */
+
+public class LambdaTest2 {
+
+    private static int count = 0;
+
+    private static void assertTrue(boolean b) {
+        if(!b)
+            throw new AssertionError();
+    }
+
+    public static void main(String[] args) {
+        LambdaTest2 test = new LambdaTest2();
+
+        test.method2((int n) -> { ; });
+        test.method2(n -> { }); // "int" is optional here
+        test.method2((int n) -> { }); // ";" is optional here
+        test.method2((int n) -> { return; }); // ";" is mandatory here
+        test.method2((int n) -> { count += n; });
+        assertTrue(count == 10);
+
+        VoidInt vi = (int i) -> {
+                            switch (i) {
+                                case 0:
+                                    System.out.println("normal");
+                                    break;
+                                default:
+                                    System.out.println("invalid");
+                            }
+                       };
+
+        test.method3(()-> { count++; });
+        test.method3(() -> {});
+        assertTrue(count == 11);
+
+        VoidVoid vv = ()-> { while(true)
+                            if(false)
+                                break;
+                            else
+                                continue;
+                       };
+
+        IntVoid iv1 = () -> 42;
+        IntVoid iv2 = () -> { return 43; };//";" is mandatory here
+        assertTrue(iv1.ivMethod() == 42);
+        assertTrue(iv2.ivMethod() == 43);
+
+        IntInt ii1 = (int n) -> n+1;
+        IntInt ii2 = n -> 42;
+        IntInt ii3 = n -> { return 43; };
+        IntInt ii4 =
+            (int n) -> {
+                if(n > 0)
+                    return n+1;
+                else
+                    return n-1;
+            };
+        assertTrue(ii1.iiMethod(1) == 2);
+        assertTrue(ii2.iiMethod(1) == 42);
+        assertTrue(ii3.iiMethod(1) == 43);
+        assertTrue(ii4.iiMethod(-1) == -2);
+    }
+
+    void method2(VoidInt a) {
+        a.viMethod(10);
+    }
+
+    void method3(VoidVoid a) {
+        a.vvMethod();
+    }
+
+    //SAM type interfaces
+    interface VoidInt {
+        void viMethod(int n);
+    }
+
+    interface VoidVoid {
+        void vvMethod();
+    }
+
+    interface IntVoid {
+        int ivMethod();
+    }
+
+    interface IntInt {
+        int iiMethod(int n);
+    }
+}