JS: Add test for private fields

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

@@ -1,4 +1,8 @@
 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

javascript/ql/test/library-tests/EndpointNaming/pack11/index.ts

@@ -0,0 +1,45 @@
+const f1 = {
+    m() {} // $ method=(pack11).C1.publicField.really.long.name.m
+};
+
+export class C1 {
+    private static privateField = f1;
+
+    public static publicField = {
+        really: {
+            long: {
+                name: f1
+            }
+        }
+    }
+} // $ class=(pack11).C1 instance=(pack11).C1.prototype
+
+const f2 = {
+    m() {} // $ method=(pack11).C2.publicField.really.long.name.m
+}
+
+export class C2 {
+    static #privateField = f2;
+
+    static publicField = {
+        really: {
+            long: {
+                name: f2
+            }
+        }
+    }
+} // $ class=(pack11).C2 instance=(pack11).C2.prototype
+
+function f3() {} // $ method=(pack11).C3.publicField.really.long.name
+
+export class C3 {
+    private static privateField = f3;
+
+    public static publicField = {
+        really: {
+            long: {
+                name: f3
+            }
+        }
+    }
+} // $ class=(pack11).C3 instance=(pack11).C3.prototype

javascript/ql/test/library-tests/EndpointNaming/pack11/package.json

@@ -0,0 +1,4 @@
+{
+    "name": "pack11",
+    "main": "./index.js"
+}