JS: Also add tests for upward calls and overriding

javascript/ql/test/library-tests/CallGraphs/AnnotatedTest/subclasses.js

@@ -7,6 +7,9 @@ class Base {
 
         /** calls:NONE */
         this.methodInSub();
+
+        /** calls:overridenInSub0 */
+        this.overridenInSub();
     }
 
     /** name:methodInBase */
@@ -14,24 +17,44 @@ class Base {
         /** calls:NONE */
         this.methodInSub();
     }
+
+    /** name:overridenInSub0 */
+    overridenInSub() {
+    }
 }
 
 class Subclass1 extends Base {
     workInSub() {
         /** calls:methodInBase */
         this.methodInBase();
+
+        /** calls:overridenInSub1 */
+        this.overridenInSub();
     }
 
+    /** name:methodInSub1 */
     methodInSub() {
     }
+
+    /** name:overridenInSub1 */
+    overridenInSub() {
+    }
 }
 
 class Subclass2 extends Base {
     workInSub() {
         /** calls:methodInBase */
         this.methodInBase();
+
+        /** calls:overridenInSub2 */
+        this.overridenInSub();
     }
 
+    /** name:methodInSub2 */
     methodInSub() {
     }
+
+    /** name:overridenInSub2 */
+    overridenInSub() {
+    }
 }