8003280: Add lambda tests

Turn on lambda expression, method reference and default method support

Reviewed-by: jjg

langtools/test/tools/javac/lambda/lambdaExpression/InvalidExpression3.java

@@ -0,0 +1,16 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8003280
+ * @summary Add lambda tests
+ *   Test invalid lambda expressions
+ * @compile/fail/ref=InvalidExpression3.out -XDrawDiagnostics InvalidExpression3.java
+ */
+
+import java.util.Comparator;
+
+public class InvalidExpression3 {
+
+    void test() {
+        Comparator<Integer> c2 = (Integer i1, Integer i2) -> { return "0"; }; //return type need to match
+    }
+}