Add barebones test of addInternalReferences.

src_nodejs/communication_fu.js

@@ -42,9 +42,10 @@ const {Thrift} = require('thrift');
  *     - tokenization: reference to the Tokenization corresponding to tokenizationId
  *
  * @function concrete.communication.Communication.prototype.addInternalReferences
- * @returns {object} Object with references to Communication-level maps (entityForUUID, etc.),
- *                   mainly intended for TypeScript consumers.  Regular JavaScript consumers can access these
- *                   properties directly on the Communication.
+ * @returns {object} Object with references to Communication-level maps (entityForUUID, entityMentionForUUID,
+ *                   sectionForUUID, sentenceForUUID, situationForUUID, situationMentionForUUID, tokenizationForUUID),
+ *                   mainly intended for TypeScript consumers.  JavaScript consumers can access these maps directly
+ *                   on the Communication.
  */
 Communication.prototype.addInternalReferences = function() {
   this.entityForUUID = {};

test_nodejs/communication_fu_test.js

@@ -0,0 +1,23 @@
+const expect = require("chai").expect;
+
+const concrete = require("../dist_nodejs");
+const commJSONData = require('../test/fixtures/dog-bites-man.concrete.json');
+
+describe("addInternalReferences", function() {
+  it("Returns Communication-level maps", function() {
+    const comm = new Communication();
+    comm.initFromTJSONProtocolObject(commJSONData);
+    const refs = comm.addInternalReferences();
+    expect(
+      comm.addInternalReferences()
+    ).to.have.all.keys([
+      "entityForUUID",
+      "entityMentionForUUID",
+      "sectionForUUID",
+      "sentenceForUUID",
+      "situationForUUID",
+      "situationMentionForUUID",
+      "tokenizationForUUID"
+    ]);
+  });
+});