8003280: Add lambda tests

Turn on lambda expression, method reference and default method support

Reviewed-by: jjg

langtools/test/tools/javac/lambda/LambdaConv18.java

@@ -0,0 +1,24 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8003280
+ * @summary Add lambda tests
+ *  simple test for lambda candidate check
+ * @compile/fail/ref=LambdaConv18.out -XDrawDiagnostics -XDidentifyLambdaCandidate=true LambdaConv18.java
+ */
+
+class LambdaConv18 {
+
+    interface SAM {
+        void m();
+    }
+
+    interface NonSAM {
+        void m1();
+        void m2();
+    }
+
+    SAM s1 = new SAM() { public void m() {} };
+    NonSAM s2 = new NonSAM() { public void m1() {}
+                              public void m2() {} };
+    NonExistent s3 = new NonExistent() { public void m() {} };
+}