moved tests, added a test

tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractUsingAbstractMethod.ts

@@ -0,0 +1,17 @@
+abstract class A {
+    abstract foo() : number;
+}
+
+class B extends A {
+    foo() { return 1; }
+}
+
+abstract class C extends A  {
+    abstract foo() : number;
+}
+
+var a = new B;
+a.foo();
+
+a = new C; // error, cannot instantiate abstract class.
+a.foo();

tests/cases/conformance/classes/classDeclarations/classAbstractKeyword/classInstantiatingAbstractClass.ts

@@ -15,4 +15,12 @@ var c : C;
 
 a = new B;
 b = new B;
-c = new B;
+c = new B;
+
+module M {
+    export abstract class A {}
+}
+
+import myA = M.A;
+
+var aa = new myA;