utility to create events in tests

src/mocks/event.js

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+/*
+Copyright 2021 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.
+*/
+
+export function event(type, id = null) {
+    return {type, event_id: id};
+}
+
+export function withContent(event, content) {
+    return Object.assign({}, event, {content});
+}
+
+export function withTextBody(event, body) {
+    return withContent(event, {body, msgtype: "m.text"});
+}
+
+export function withTxnId(event, txnId) {
+    return Object.assign({}, event, {unsigned: {transaction_id: txnId}});
+}