updated mocha and sinon, fixed test

services/track-changes/package-lock.json

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+        "strip-ansi": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
+          "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^3.0.0"
+          }
+        }
+      }
+    },
     "word-wrap": {
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
@@ -7168,6 +7446,17 @@
         "decamelize": "^1.2.0"
       }
     },
+    "yargs-unparser": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-1.6.0.tgz",
+      "integrity": "sha512-W9tKgmSn0DpSatfri0nx52Joq5hVXgeLiqR/5G0sZNDoLZFOr/xjBUDcShCOGNsBnEMNo1KAMBkTej1Hm62HTw==",
+      "dev": true,
+      "requires": {
+        "flat": "^4.1.0",
+        "lodash": "^4.17.15",
+        "yargs": "^13.3.0"
+      }
+    },
     "yn": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/yn/-/yn-3.1.1.tgz",

services/track-changes/package.json

@@ -59,11 +59,11 @@
     "eslint-plugin-react": "^7.19.0",
     "eslint-plugin-standard": "^4.0.1",
     "memorystream": "0.3.1",
-    "mocha": "^4.0.1",
+    "mocha": "^7.1.1",
     "prettier": "^2.0.1",
     "prettier-eslint-cli": "^5.0.0",
     "sandboxed-module": "~0.3.0",
-    "sinon": "~3.2.1",
+    "sinon": "~9.0.1",
     "timekeeper": "0.0.4"
   }
 }

services/track-changes/test/unit/js/DiffManager/DiffManagerTests.js

@@ -181,7 +181,7 @@ describe('DiffManager', function() {
       })
     })
 
-    return describe('when the updates are inconsistent', function() {
+    describe('when the updates are inconsistent', function() {
       beforeEach(function() {
         this.DiffManager.getLatestDocAndUpdates = sinon
           .stub()
@@ -189,7 +189,9 @@ describe('DiffManager', function() {
         this.DiffGenerator.buildDiff = sinon
           .stub()
           .throws((this.error = new Error('inconsistent!')))
-        return this.DiffManager.getDiff(
+        this.DiffGenerator.rewindUpdates = sinon
+            .stub()
+        this.DiffManager.getDiff(
           this.project_id,
           this.doc_id,
           this.fromVersion,
@@ -198,8 +200,10 @@ describe('DiffManager', function() {
         )
       })
 
-      return it('should call the callback with an error', function() {
-        return this.callback.calledWith(this.error).should.equal(true)
+      it('should call the callback with an error', function() {
+        this.callback.calledWith(sinon.match(Error)).should.equal(true)
+        const errorObj = this.callback.args[0][0]
+        expect(errorObj.message).to.include('inconsistent!')
       })
     })
   })