Updated the files.

my-app/node_modules/rxjs/dist/esm5/internal/testing/HotObservable.js

@@ -0,0 +1,45 @@
+import { __extends } from "tslib";
+import { Subject } from '../Subject';
+import { Subscription } from '../Subscription';
+import { SubscriptionLoggable } from './SubscriptionLoggable';
+import { applyMixins } from '../util/applyMixins';
+import { observeNotification } from '../Notification';
+var HotObservable = (function (_super) {
+    __extends(HotObservable, _super);
+    function HotObservable(messages, scheduler) {
+        var _this = _super.call(this) || this;
+        _this.messages = messages;
+        _this.subscriptions = [];
+        _this.scheduler = scheduler;
+        return _this;
+    }
+    HotObservable.prototype._subscribe = function (subscriber) {
+        var subject = this;
+        var index = subject.logSubscribedFrame();
+        var subscription = new Subscription();
+        subscription.add(new Subscription(function () {
+            subject.logUnsubscribedFrame(index);
+        }));
+        subscription.add(_super.prototype._subscribe.call(this, subscriber));
+        return subscription;
+    };
+    HotObservable.prototype.setup = function () {
+        var subject = this;
+        var messagesLength = subject.messages.length;
+        var _loop_1 = function (i) {
+            (function () {
+                var _a = subject.messages[i], notification = _a.notification, frame = _a.frame;
+                subject.scheduler.schedule(function () {
+                    observeNotification(notification, subject);
+                }, frame);
+            })();
+        };
+        for (var i = 0; i < messagesLength; i++) {
+            _loop_1(i);
+        }
+    };
+    return HotObservable;
+}(Subject));
+export { HotObservable };
+applyMixins(HotObservable, [SubscriptionLoggable]);
+//# sourceMappingURL=HotObservable.js.map