8003280: Add lambda tests

Turn on lambda expression, method reference and default method support

Reviewed-by: jjg

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

@@ -0,0 +1,16 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8003280
+ * @summary Add lambda tests
+ *  check that lambda expression body (when not a block) cannot be void
+ * @author  Maurizio Cimadamore
+ * @compile/fail/ref=LambdaExprNotVoid.out -XDlambdaInferenceDiags=false -XDrawDiagnostics LambdaExprNotVoid.java
+ */
+
+class LambdaExpr05 {
+
+    interface SAM { void foo(int i); }
+
+    SAM s1 = i -> i * 2;
+    SAM s2 = i -> 2 * i;
+}