8003280: Add lambda tests

Turn on lambda expression, method reference and default method support

Reviewed-by: jjg

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

@@ -0,0 +1,31 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8003280
+ * @summary Add lambda tests
+ *  check that lambda is only allowed in argument/cast/assignment context
+ * @author  Maurizio Cimadamore
+ * @compile/fail/ref=BadLambdaPos.out -XDrawDiagnostics BadLambdaPos.java
+ */
+
+interface SAM {
+    void m(Integer x);
+}
+
+class Test {
+    void test(Object x) {}
+
+    void test1() {
+        test((int x)-> { } + (int x)-> { } );
+        test((int x)-> { } instanceof Object );
+    }
+
+    void test2() {
+        int i2 = (int x)-> { } + (int x)-> { };
+        boolean b = (int x)-> { } instanceof Object;
+    }
+
+    void test3() {
+        test((Object)(int x)-> { });
+        Object o = (Object)(int x)-> { };
+    }
+}