Keep time!

package-lock.json

@@ -23515,6 +23515,12 @@
       "integrity": "sha1-8y6srFoXW+ol1/q1Zas+2HQe9W8=",
       "dev": true
     },
+    "timekeeper": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/timekeeper/-/timekeeper-2.1.2.tgz",
+      "integrity": "sha512-fc1DDqbiyz5vxRO4xkiATwfWUw1FV7W20+FJYal1SnoIYgNuB4WNxYLtbG3zjUBwOSk3P4u1TgBAZYG/aqBWMw==",
+      "dev": true
+    },
     "timers-browserify": {
       "version": "2.0.10",
       "resolved": "https://registry.npmjs.org/timers-browserify/-/timers-browserify-2.0.10.tgz",

package.json

@@ -209,6 +209,7 @@
     "simulant": "^0.2.2",
     "sinon": "^6.1.5",
     "style-loader": "^0.21.0",
+    "timekeeper": "^2.1.2",
     "ts-jest": "^23.0.0",
     "ts-loader": "^4.4.2",
     "ts-node": "^6.2.0",

src/core/client/stream/test/__snapshots__/postComment.spec.tsx.snap

@@ -194,10 +194,10 @@ exports[`post a comment 1`] = `
             </span>
             <time
               className="Timestamp-root RelativeTime-root"
-              dateTime="2018-08-31T16:14:09.617Z"
-              title="2018-08-31T16:14:09.617Z"
+              dateTime="2018-07-06T18:24:00.002Z"
+              title="2018-07-06T18:24:00.002Z"
             >
-              2018-08-31T16:14:09.617Z
+              2018-07-06T18:24:00.002Z
             </time>
           </div>
           <div

src/core/client/stream/test/postComment.spec.tsx

@@ -1,6 +1,7 @@
 import React from "react";
 import TestRenderer, { ReactTestRenderer } from "react-test-renderer";
 import { RecordProxy } from "relay-runtime";
+import timekeeper from "timekeeper";
 
 import { timeout } from "talk-common/utils";
 import { TalkContext, TalkContextProvider } from "talk-framework/lib/bootstrap";
@@ -94,11 +95,13 @@ it("post a comment", async () => {
     .findByProps({ inputId: "comments-postCommentForm-field" })
     .props.onChange({ html: "<strong>Hello world!</strong>" });
 
+  timekeeper.travel(new Date("2018-07-06T18:24:00.000Z"));
   testRenderer.root
     .findByProps({ id: "comments-postCommentForm-form" })
     .props.onSubmit();
   // Test optimistic response.
   expect(testRenderer.toJSON()).toMatchSnapshot();
+  timekeeper.reset();
 
   // Wait for loading.
   await timeout();