Updated the files.

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

@@ -0,0 +1,62 @@
+"use strict";
+var __extends = (this && this.__extends) || (function () {
+    var extendStatics = function (d, b) {
+        extendStatics = Object.setPrototypeOf ||
+            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
+        return extendStatics(d, b);
+    };
+    return function (d, b) {
+        if (typeof b !== "function" && b !== null)
+            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
+        extendStatics(d, b);
+        function __() { this.constructor = d; }
+        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+    };
+})();
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.HotObservable = void 0;
+var Subject_1 = require("../Subject");
+var Subscription_1 = require("../Subscription");
+var SubscriptionLoggable_1 = require("./SubscriptionLoggable");
+var applyMixins_1 = require("../util/applyMixins");
+var Notification_1 = require("../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_1.Subscription();
+        subscription.add(new Subscription_1.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 () {
+                    Notification_1.observeNotification(notification, subject);
+                }, frame);
+            })();
+        };
+        for (var i = 0; i < messagesLength; i++) {
+            _loop_1(i);
+        }
+    };
+    return HotObservable;
+}(Subject_1.Subject));
+exports.HotObservable = HotObservable;
+applyMixins_1.applyMixins(HotObservable, [SubscriptionLoggable_1.SubscriptionLoggable]);
+//# sourceMappingURL=HotObservable.js.map