8003280: Add lambda tests

Turn on lambda expression, method reference and default method support

Reviewed-by: jjg

langtools/test/tools/javac/lambda/methodReference/MethodRef7.java

@@ -0,0 +1,105 @@
+/*
+ * 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 that parameter types are inferred from SAM descriptor when method parameters are elided,
+             with different types of method references
+ * @compile MethodRef7.java
+ * @run main MethodRef7
+ */
+
+public class MethodRef7 {
+
+    static interface A {void m();}
+
+    static interface A2 {void m(int n);}
+
+    static interface B {String m();}
+
+    static interface B2 {String m(int n);}
+
+    static interface C {String m(MethodRef7 mr);}
+
+    static interface C2 {String m(MethodRef7 mr, int n);}
+
+    static interface D {Fee<String> m();}
+
+    static interface D2 {Fee<String> m(String s);}
+
+    static class Fee<T> {
+
+        public Fee() {
+            System.out.println("Fee<T> instantiated");
+        }
+
+        public Fee(String s) {
+            System.out.println("Fee<T> instantiated: " + s);
+        }
+    }
+
+    private static void assertTrue(boolean cond) {
+        if (!cond)
+            throw new AssertionError();
+    }
+
+    static void bar() {
+        System.out.println("MethodRef_neg1.bar()");
+    }
+
+    static void bar(int x) {
+        System.out.println("MethodRef_neg1.bar(int) " + x);
+    }
+
+    String wahoo() {
+        return "wahoo";
+    }
+
+    String wahoo(int x) {
+        return "wahoo " + x;
+    }
+
+    public static void main(String[] args) {
+
+        A a = MethodRef7::bar; //static reference to bar()
+        a.m();
+        A2 a2 = MethodRef7::bar; //static reference to bar(int x)
+        a2.m(10);
+
+        MethodRef7 mr = new MethodRef7();
+        B b = mr::wahoo; //instance reference to wahoo()
+        assertTrue(b.m().equals("wahoo"));
+        B2 b2 = mr::wahoo; //instance reference to wahoo(int x)
+        assertTrue(b2.m(1).equals("wahoo 1"));
+
+        C c = MethodRef7::wahoo; //unbound reference to wahoo()
+        assertTrue(c.m(mr).equals("wahoo"));
+        C2 c2 = MethodRef7::wahoo; //unbound reference to wahoo(int x)
+        assertTrue(c2.m(mr, 2).equals("wahoo 2"));
+
+        D d = Fee<String>::new; //constructor reference to Fee()
+        D2 d2 = Fee<String>::new; //constructor reference to Fee(String s)
+    }
+}