8003280: Add lambda tests

Turn on lambda expression, method reference and default method support

Reviewed-by: jjg

langtools/test/tools/javac/lambda/BadConv04.java

@@ -0,0 +1,22 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8003280
+ * @summary Add lambda tests
+ *  check that ill-formed SAM type generates right diagnostic when SAM converted
+ * @compile/fail/ref=BadConv04.out -XDrawDiagnostics BadConv04.java
+ */
+
+class BadConv04 {
+
+    interface I1 {
+        int m();
+    }
+
+    interface I2 {
+        long m();
+    }
+
+    interface SAM extends I1, I2 {}
+
+    SAM s = ()-> { };
+}