Convert end-to-end tests to Typescript (#7206)

test/end-to-end-tests/src/util.ts

@@ -0,0 +1,42 @@
+/*
+Copyright 2018 New Vector Ltd
+Copyright 2019 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import { ElementSession } from "./session";
+
+export const range = function(start: number, amount: number, step = 1): Array<number> {
+    const r = [];
+    for (let i = 0; i < amount; ++i) {
+        r.push(start + (i * step));
+    }
+    return r;
+};
+
+export const delay = function(ms): Promise<void> {
+    return new Promise((resolve) => setTimeout(resolve, ms));
+};
+
+export const measureStart = function(session: ElementSession, name: string): Promise<void> {
+    return session.page.evaluate(_name => {
+        window.mxPerformanceMonitor.start(_name);
+    }, name);
+};
+
+export const measureStop = function(session: ElementSession, name: string): Promise<void> {
+    return session.page.evaluate(_name => {
+        window.mxPerformanceMonitor.stop(_name);
+    }, name);
+};