add ll tests to check if all expected members are in memberlist

also move verify-device use case to timeline to reuse memberlist
query for this test.

src/usecases/memberlist.js

@@ -0,0 +1,48 @@
+/*
+Copyright 2018 New Vector Ltd
+
+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.
+*/
+
+const assert = require('assert');
+
+module.exports.verifyDeviceForUser = async function(session, name, expectedDevice) {
+    session.log.step(`verifies e2e device for ${name}`);
+    const membersAndNames = await getMembersInMemberlist(session);
+    const matchingLabel = membersAndNames.filter((m) => {
+        return m.displayName === name;
+    }).map((m) => m.label)[0];
+    await matchingLabel.click();
+    const firstVerifyButton = await session.waitAndQuery(".mx_MemberDeviceInfo_verify");
+    await firstVerifyButton.click();
+    const dialogCodeFields = await session.waitAndQueryAll(".mx_QuestionDialog code");
+    assert.equal(dialogCodeFields.length, 2);
+    const deviceId = await session.innerText(dialogCodeFields[0]);
+    const deviceKey = await session.innerText(dialogCodeFields[1]);
+    assert.equal(expectedDevice.id, deviceId);
+    assert.equal(expectedDevice.key, deviceKey);
+    const confirmButton = await session.query(".mx_Dialog_primary");
+    await confirmButton.click();
+    const closeMemberInfo = await session.query(".mx_MemberInfo_cancel");
+    await closeMemberInfo.click();
+    session.log.done();
+}
+
+async function getMembersInMemberlist(session) {
+    const memberNameElements = await session.waitAndQueryAll(".mx_MemberList .mx_EntityTile_name");
+    return Promise.all(memberNameElements.map(async (el) => {
+        return {label: el, displayName: await session.innerText(el)};
+    }));
+}
+
+module.exports.getMembersInMemberlist = getMembersInMemberlist;