added new spec for checking inbox pagination after loading all messages

FlowCrypt/Controllers/Inbox/InboxViewController.swift

@@ -100,6 +100,7 @@ extension InboxViewController {
             $0.delegate = self
             $0.dataSource = self
             $0.leadingScreensForBatching = 1
+            $0.accessibilityIdentifier = "aid-inbox-list"
             $0.view.refreshControl = refreshControl
             node.addSubnode($0)
         }

appium/tests/helpers/MailFolderHelper.ts

@@ -0,0 +1,15 @@
+import MailFolderScreen from "../screenobjects/mail-folder.screen";
+
+
+class MailFolderHelper {
+
+  static checkPagination = async (subject: string) => {
+    const emailsCountBeforeScroll = await MailFolderScreen.getEmailCount();
+    await MailFolderScreen.scrollDownToEmail(subject);
+    expect(emailsCountBeforeScroll).toEqual(40); //Should be changed to 20 when https://github.com/FlowCrypt/flowcrypt-ios/issues/1366 is fixed
+
+    const emailsCountAfterScroll = await MailFolderScreen.getEmailCount();
+    expect(emailsCountBeforeScroll).toBeLessThan(emailsCountAfterScroll);
+  }
+}
+export default MailFolderHelper;

appium/tests/helpers/TouchHelper.ts

@@ -53,5 +53,28 @@ class TouchHelper {
     }
     throw new Error(`Element ${JSON.stringify(element.selector)} not displayed after scroll`);
   }
+
+  static scrollUpToElement = async (element: WebdriverIO.Element) => {
+    const { width, height } = await driver.getWindowSize();
+    const anchor = width / 2;
+    const startPoint = height * 0.15;
+    const endPoint = height * 0.75;
+
+    // this wait can be later replaced by waiting for loader to go away before scrolling
+    await browser.pause(1000); // make sure contents are loaded first, so we don't scroll too early
+    for(let i = 0; i < 15; i++) {
+      if (await element.isDisplayed()) {
+       return;
+      }
+      await driver.touchPerform([
+        {action: 'press', options: {x: anchor, y: startPoint}},
+        {action: 'wait', options: {ms: 100}},
+        {action: 'moveTo', options: {x: anchor, y: endPoint}},
+        {action: 'release', options: {}},
+      ]);
+      await browser.pause(1000); // due to scroll action which takes about second
+    }
+    throw new Error(`Element ${JSON.stringify(element.selector)} not displayed after scroll`);
+  }
 }
 export default TouchHelper;

appium/tests/screenobjects/mail-folder.screen.ts

@@ -9,7 +9,8 @@ const SELECTORS = {
   INBOX_HEADER: '~navigationItemInbox',
   SEARCH_ICON: '~search icn',
   HELP_ICON: '~help icn',
-  SEARCH_FIELD: '~searchAllEmailField'
+  SEARCH_FIELD: '~searchAllEmailField',
+  INBOX_LIST: '-ios class chain:**/XCUIElementTypeOther/XCUIElementTypeTable[2]/XCUIElementTypeCell',
 };
 
 class MailFolderScreen extends BaseScreen {
@@ -45,6 +46,10 @@ class MailFolderScreen extends BaseScreen {
     return $(SELECTORS.SEARCH_FIELD);
   }
 
+  get inboxList() {
+    return $$(SELECTORS.INBOX_LIST);
+  }
+
   checkTrashScreen = async () => {
     await expect(await this.trashHeader).toBeDisplayed();
     await expect(await this.searchIcon).toBeDisplayed();
@@ -88,6 +93,21 @@ class MailFolderScreen extends BaseScreen {
     await $(`~${email}`).click();
   }
 
+  scrollDownToEmail = async (subject: string) => {
+    const elem = $(`~${subject}`);
+    await TouchHelper.scrollDownToElement(await elem);
+  };
+
+  getEmailCount = async () => {
+      await browser.pause(1000);
+      return await this.inboxList.length;
+  };
+
+  scrollUpToFirstEmail = async () => {
+    const elem = await this.inboxList[0];
+    await TouchHelper.scrollUpToElement(elem);
+  }
+
   checkInboxScreen = async () => {
     await expect(await this.inboxHeader).toBeDisplayed();
     await expect(await this.searchIcon).toBeDisplayed();

appium/tests/specs/live/inbox/CheckinboxPaginationAfterLoadingAllEmails.spec.ts

@@ -0,0 +1,27 @@
+import {
+  SplashScreen,
+  SetupKeyScreen,
+  MailFolderScreen,
+} from '../../../screenobjects/all-screens';
+
+import { CommonData } from '../../../data';
+import MailFolderHelper from "../../../helpers/MailFolderHelper";
+
+describe('INBOX: ', () => {
+
+  it('check inbox pagination after loading all messages', async () => {
+
+    const firstEmailSubject = CommonData.simpleEmail.subject;
+
+    await SplashScreen.login();
+    await SetupKeyScreen.setPassPhrase();
+    await MailFolderScreen.checkInboxScreen();
+
+    await MailFolderHelper.checkPagination(firstEmailSubject);
+
+    await MailFolderScreen.scrollUpToFirstEmail();
+    await MailFolderScreen.refreshMailList();
+
+    await MailFolderHelper.checkPagination(firstEmailSubject);
+  });
+});