8003280: Add lambda tests

Turn on lambda expression, method reference and default method support

Reviewed-by: jjg

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

@@ -0,0 +1,36 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8003280
+ * @summary Add lambda tests
+ *   This is negative test for wrong parameter/return type in method references
+ * @compile/fail/ref=MethodRef_neg.out -XDrawDiagnostics MethodRef_neg.java
+ */
+
+public class MethodRef_neg {
+
+    static interface A {void m(Integer i);}
+
+    static interface B {void m(String s);}
+
+    static interface C {Integer m();}
+
+    static interface D {String m();}
+
+
+    static void bar(int x) { }
+
+    int foo() {
+        return 5;
+    }
+
+    static void make() { }
+
+    void method() {
+        A a = MethodRef_neg::bar; //boxing on parameter type is ok
+        B b = MethodRef_neg::bar; //wrong parameter type, required: String, actual: int
+        C c = this::foo; //boxing on return type is ok
+        D d = this::foo; //wrong return type, required: String, actual: int
+        a = MethodRef_neg::make; //missing parameter
+        c = MethodRef_neg::make; //missing return type
+    }
+}