8003280: Add lambda tests

Turn on lambda expression, method reference and default method support

Reviewed-by: jjg

langtools/test/tools/javac/lambda/LambdaConv09.java

@@ -0,0 +1,50 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8003280
+ * @summary Add lambda tests
+ *  check that SAM conversion handles Object members correctly
+ * @author  Alex Buckley
+ * @author  Maurizio Cimadamore
+ * @compile/fail/ref=LambdaConv09.out -XDrawDiagnostics LambdaConv09.java
+ */
+
+class LambdaConv09 {
+
+    // Not a SAM type; not enough abstract methods
+    interface Foo1 {}
+
+    // SAM type; Foo has no abstract methods
+    interface Foo2 { boolean equals(Object object); }
+
+
+    // Not a SAM type; Foo still has no abstract methods
+    interface Foo3 extends Foo2 { public abstract String toString(); }
+
+    // SAM type; Bar has one abstract non-Object method
+    interface Foo4<T> extends Foo2 { int compare(T o1, T o2); }
+
+    // Not a SAM type; still no valid abstract methods
+    interface Foo5 {
+        boolean equals(Object object);
+        String toString();
+    }
+
+    // SAM type; Foo6 has one abstract non-Object method
+    interface Foo6<T> {
+        boolean equals(Object obj);
+        int compare(T o1, T o2);
+    }
+
+    // SAM type; Foo6 has one abstract non-Object method
+    interface Foo7<T> extends Foo2, Foo6<T> { }
+
+    void test() {
+        Foo1 f1 = ()-> { };
+        Foo2 f2 = ()-> { };
+        Foo3 f3 = x -> true;
+        Foo4 f4 = (x, y) -> 1;
+        Foo5 f5 = x -> true;
+        Foo6 f6 = (x, y) -> 1;
+        Foo7 f7 = (x, y) -> 1;
+    }
+}