Screenshot tests (#130)

* #9 Add snapshot testing library

* #9 Create script to boot test simulators

* #9 Create the UI test plan

* #9 Create shared schemes for test targets

* #9 Disable split view for UI tests

* #9 Fix fastlane dependencies

* #9 Add snapshot testing to the application

* #9 assert screenshots

* #9 fix swipe gestures on iPad

* #9 Fix accessing items in session verification screen

* #9 Workaround for flaky unit test

* #9 Specify scheme for alpha build

* #9 Add reference screenshots

* Update python script path and check assets for png check

* Update script path

* Use static timezone for simulator time

* Fix build after SwiftFormat

* Add changelog

* Upload failed screenshots artifact

* Always upload artifacts

* Update boot simulator script

* Update simulator overridden time

* Install pytz before tests

* Get time from Ruby script

* Disable SwiftUI animation when running UI tests

* Update screenshots after animation setting

* Include reference images in the artifact

* Update matching precision

* Update image matching precision & revert artifact content

* Include Xcode result in the artifact

* Update test output directory

* Disable gradient on splash screen for tests

* Tap next button explicitly

* Wait a bit before checking alert

* Wait 1 second

* Run SwiftFormat on project

* Ignore temporary screenshots

* Fix most of the PR remarks

* Fix conflicts

* Bump Python version to 3

* Update reference screenshots for authentication screens

* Update SwiftFormat

* Fix flakey session verification test.

* Update scheme.

Co-authored-by: Doug <douglase@element.io>

.github/workflows/tests.yml

@@ -17,7 +17,14 @@ jobs:
       cancel-in-progress: true
 
     steps:
+      - name: Setup Xcode version
+        uses: maxim-lobanov/setup-xcode@v1.4.1
+        with:
+          xcode-version: '13.4'
+
       - uses: actions/checkout@v3
+        with:
+          lfs: true
 
       - uses: actions/cache@v3
         with:
@@ -33,6 +40,15 @@ jobs:
       
       - name: Run tests
         run: bundle exec fastlane tests
+      
+      - name: Archive artifacts
+        uses: actions/upload-artifact@v3
+        if: always()
+        with:
+          name: test-output
+          path: fastlane/test_output
+          retention-days: 7
+          if-no-files-found: ignore
 
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v3