JS: Check privacy earlier

Author: asgerf

javascript/ql/lib/semmle/javascript/endpoints/EndpointNaming.qll

@@ -38,19 +38,21 @@ private string join(string x, string y) {
 
 private predicate isPackageExport(API::Node node) { node = API::moduleExport(_) }
 
-private predicate memberEdge(API::Node pred, API::Node succ) { succ = pred.getAMember() }
+private predicate relevantEdge(API::Node pred, API::Node succ) {
+  succ = pred.getAMember() and
+  not isPrivateLike(succ)
+}
 
 /** Gets the shortest distance from a packaeg export to `nd` in the API graph. */
 private int distanceFromPackageExport(API::Node nd) =
-  shortestDistances(isPackageExport/1, memberEdge/2)(_, nd, result)
+  shortestDistances(isPackageExport/1, relevantEdge/2)(_, nd, result)
 
 private predicate isExported(API::Node node) {
   isPackageExport(node)
   or
   exists(API::Node pred |
     isExported(pred) and
-    memberEdge(pred, node) and
-    not isPrivateLike(node)
+    relevantEdge(pred, node)
   )
 }
 
@@ -81,6 +83,7 @@ private predicate isPrivateLike(API::Node node) { isPrivateAssignment(node.asSin
 
 private API::Node getASuccessor(API::Node node, string name, int badness) {
   isExported(node) and
+  isExported(result) and
   exists(string member |
     result = node.getMember(member) and
     if member = "default"

javascript/ql/test/library-tests/EndpointNaming/EndpointNaming.expected

@@ -1,12 +1,11 @@
 testFailures
-| pack11/index.ts:2:12:2:65 | // $ me ... .name.m | Missing result:method=(pack11).C1.publicField.really.long.name.m |
 | pack11/index.ts:33:1:33:16 |  | Unexpected result: method=(pack11).C3.privateField |
 | pack11/index.ts:33:18:33:69 | // $ me ... ng.name | Missing result:method=(pack11).C3.publicField.really.long.name |
 | pack11/index.ts:41:23:41:24 |  | Unexpected result: alias=(pack11).C3.publicField.really.long.name==(pack11).C3.privateField |
 ambiguousPreferredPredecessor
 | pack2/lib.js:8:22:8:34 | def moduleImport("pack2").getMember("exports").getMember("lib").getMember("LibClass").getMember("foo") |
 ambiguousSinkName
 ambiguousClassObjectName
-ambiguousClassInstanceName
 failures
+ambiguousClassInstanceName
 ambiguousFunctionName