CI test integration (#2429)

* Squash into one commit Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> * Refactor Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> * Put script in a gist Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> * Exclude tests from lint Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> * Add README info for tests Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> * Remove local script Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> * New gist Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> * Revert "Remove local script" This reverts commit b0da803377. Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> * Restore local script Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> * Update README Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> * Fix test Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> * Refactor Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> * Remove code Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> * Swiftlint Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> * Refactor Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> * Update Tests/NextcloudUITests/LoginUITests.swift Co-authored-by: Marcel Müller <marcel-mueller@gmx.de> Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> * Refactor Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> * Try to fix failing test Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> * Add base UI test class Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> * Use docker set up alternative Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> --------- Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com> Co-authored-by: Marcel Müller <marcel-mueller@gmx.de>
2023-06-22 15:59:55 +02:00 · 2023-06-22 15:59:55 +02:00 · 422440e1a9
--- a/.github/workflows/additional-targets.yml
+++ b/.github/workflows/additional-targets.yml
@ -0,0 +1,68 @@
+name: Build additional targets
+
+on:
+  push:
+    branches:
+      - master
+      - develop
+  pull_request:
+    types: [synchronize, opened, reopened, ready_for_review]
+    branches:
+      - master
+      - develop
+
+jobs:
+  build-and-test:
+    name: Build and Test
+    runs-on: macOS-latest
+    if: github.event.pull_request.draft == false
+    env:
+      PROJECT: Nextcloud.xcodeproj
+      DESTINATION: platform=iOS Simulator,name=iPhone 14
+    steps:
+    - name: Set env var
+      run: echo "DEVELOPER_DIR=$(xcode-select --print-path)" >> $GITHUB_ENV
+    - uses: actions/checkout@v3
+    - name: Setup Bundler and Install Gems
+      run: |
+        gem install bundler
+        bundle install
+        bundle update
+    - name: Restore Carhage Cache
+      uses: actions/cache@v3
+      id: carthage-cache
+      with:
+        path: Carthage
+        key: ${{ runner.os }}-carthage-${{ hashFiles('**/Cartfile.resolved') }}
+        restore-keys: |
+          ${{ runner.os }}-carthage-
+    - name: Carthage
+      if: steps.carthage-cache.outputs.cache-hit != 'true'
+      run: carthage bootstrap --use-xcframeworks --platform iOS
+    - name: Download GoogleService-Info.plist
+      run: wget "https://raw.githubusercontent.com/firebase/quickstart-ios/master/mock-GoogleService-Info.plist" -O GoogleService-Info.plist
+    - name: Build iOS Share
+      run: |
+        xcodebuild build -project $PROJECT -scheme "$SCHEME" -destination "$DESTINATION"
+      env:
+          SCHEME: Share
+    - name: Build iOS File Extension
+      run: |
+        xcodebuild build -project $PROJECT -scheme "$SCHEME" -destination "$DESTINATION"
+      env:
+          SCHEME: File Provider Extension
+    - name: Build iOS Notification Extension
+      run: |
+        xcodebuild build -project $PROJECT -scheme "$SCHEME" -destination "$DESTINATION"
+      env:
+          SCHEME: Notification Service Extension
+    - name: Build iOS Widget
+      run: |
+        xcodebuild build -project $PROJECT -scheme "$SCHEME" -destination "$DESTINATION"
+      env:
+          SCHEME: Widget
+    - name: Build iOS Widget Dashboard IntentHandler
+      run: |
+        xcodebuild build -project $PROJECT -scheme "$SCHEME" -destination "$DESTINATION"
+      env:
+          SCHEME: WidgetDashboardIntentHandler
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@ -20,7 +20,7 @@ jobs:
    if: github.event.pull_request.draft == false

    steps:
-     - uses: actions/checkout@v2
+     - uses: actions/checkout@v3

     - name: GitHub Action for SwiftLint
       uses: norio-nomura/action-swiftlint@3.1.0
--- a/.github/workflows/xcode.yml
+++ b/.github/workflows/xcode.yml
@ -1,4 +1,4 @@
-name: Build
+name: Build main target

 on:
  push:
@ -12,18 +12,25 @@ on:
      - develop

 jobs:
-  XCBuild:
+  build-and-test:
+    name: Build and Test
    runs-on: macOS-latest
    if: github.event.pull_request.draft == false
    env:
      PROJECT: Nextcloud.xcodeproj
      DESTINATION: platform=iOS Simulator,name=iPhone 14
+      SCHEME: Nextcloud
    steps:
    - name: Set env var
      run: echo "DEVELOPER_DIR=$(xcode-select --print-path)" >> $GITHUB_ENV
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
+    - name: Setup Bundler and Install Gems
+      run: |
+        gem install bundler
+        bundle install
+        bundle update
    - name: Restore Carhage Cache
-      uses: actions/cache@v2
+      uses: actions/cache@v3
      id: carthage-cache
      with:
        path: Carthage
@ -35,34 +42,30 @@ jobs:
      run: carthage bootstrap --use-xcframeworks --platform iOS
    - name: Download GoogleService-Info.plist
      run: wget "https://raw.githubusercontent.com/firebase/quickstart-ios/master/mock-GoogleService-Info.plist" -O GoogleService-Info.plist
+    - name: Install docker
+      run: |
+        brew install docker
+        colima start
+    - name: Create docker test server and export enviroment variables
+      run: |
+        source ./create-docker-test-server.sh
+        if [ ! -f ".env-vars" ]; then
+            touch .env-vars
+            echo "export TEST_SERVER_URL=$TEST_SERVER_URL" >> .env-vars
+            echo "export TEST_USER=$TEST_USER" >> .env-vars
+            echo "export TEST_APP_PASSWORD=$TEST_APP_PASSWORD" >> .env-vars
+        fi
    - name: Build & Test Nextcloud iOS
      run: |
-        xcodebuild clean build test -project $PROJECT -scheme "$SCHEME" -destination "$DESTINATION"
-      env:
-          SCHEME: Nextcloud
-    - name: Build iOS Share
+        set -o pipefail && xcodebuild test -project $PROJECT \
+        -scheme "$SCHEME" \
+        -destination "$DESTINATION" \
+        -enableCodeCoverage YES \
+        -test-iterations 3 \
+        -retry-tests-on-failure \
+        | xcpretty
+    - name: Upload coverage to codecov
      run: |
-        xcodebuild build -project $PROJECT -scheme "$SCHEME" -destination "$DESTINATION"
-      env:
-          SCHEME: Share
-    - name: Build iOS File Extension
-      run: |
-        xcodebuild build -project $PROJECT -scheme "$SCHEME" -destination "$DESTINATION"
-      env:
-          SCHEME: File Provider Extension
-    - name: Build iOS Notification Extension
-      run: |
-        xcodebuild build -project $PROJECT -scheme "$SCHEME" -destination "$DESTINATION"
-      env:
-          SCHEME: Notification Service Extension
-    - name: Build iOS Widget
-      run: |
-        xcodebuild build -project $PROJECT -scheme "$SCHEME" -destination "$DESTINATION"
-      env:
-          SCHEME: Widget
-    - name: Build iOS Widget Dashboard IntentHandler
-      run: |
-        xcodebuild build -project $PROJECT -scheme "$SCHEME" -destination "$DESTINATION"
-      env:
-          SCHEME: WidgetDashboardIntentHandler
+        bundle exec slather
+        bash <(curl -s https://codecov.io/bash) -f ./cobertura.xml -X coveragepy -X gcov -X xcode -t ${{ secrets.CODECOV_TOKEN }}

--- a/.gitignore
+++ b/.gitignore
@ -42,3 +42,5 @@ Carthage/
 .swiftpm
 Package.resolved

+*.generated.swift
+/.env-vars
--- a/.slather.yml
+++ b/.slather.yml
@ -0,0 +1,3 @@
+coverage_service: cobertura_xml
+xcodeproj: Nextcloud.xcodeproj
+scheme: Nextcloud
--- a/.swiftlint.yml
+++ b/.swiftlint.yml
@ -42,6 +42,7 @@ disabled_rules:
 excluded:
  - Carthage
  - Pods
+  - Tests

  # iOS Files Quarantine

--- a/3
+++ b/3
@ -0,0 +1,3 @@
+source 'https://rubygems.org'
+gem 'slather'
+gem 'xcpretty' 
--- a/Nextcloud.xcodeproj/project.pbxproj
+++ b/Nextcloud.xcodeproj/project.pbxproj
--- a/Nextcloud.xcodeproj/xcshareddata/xcschemes/File
+++ b/Nextcloud.xcodeproj/xcshareddata/xcschemes/File
@ -57,8 +57,52 @@
            <BuildableReference
               BuildableIdentifier = "primary"
               BlueprintIdentifier = "AF8ED1F82757821000B8DBC4"
-               BuildableName = "NextcloudTests.xctest"
-               BlueprintName = "NextcloudTests"
+               BuildableName = "NextcloudUnitTests.xctest"
+               BlueprintName = "NextcloudUnitTests"
+               ReferencedContainer = "container:Nextcloud.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "C0046CD92A17B98400D87C9D"
+               BuildableName = "NextcloudUITests.xctest"
+               BlueprintName = "NextcloudUITests"
+               ReferencedContainer = "container:Nextcloud.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "C04E2F1F2A17BB4D001BAD85"
+               BuildableName = "NextcloudIntegrationTests.xctest"
+               BlueprintName = "NextcloudIntegrationTests"
+               ReferencedContainer = "container:Nextcloud.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "C04E2F2C2A17BB77001BAD85"
+               BuildableName = "NextcloudEndToEndTests.xctest"
+               BlueprintName = "NextcloudEndToEndTests"
+               ReferencedContainer = "container:Nextcloud.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "F31F69412A2F6D4500162F76"
+               BuildableName = "NextcloudSnapshotTests.xctest"
+               BlueprintName = "NextcloudSnapshotTests"
               ReferencedContainer = "container:Nextcloud.xcodeproj">
            </BuildableReference>
         </TestableReference>
--- a/Nextcloud.xcodeproj/xcshareddata/xcschemes/Nextcloud.xcscheme
+++ b/Nextcloud.xcodeproj/xcshareddata/xcschemes/Nextcloud.xcscheme
@ -26,7 +26,8 @@
      buildConfiguration = "Debug"
      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      shouldUseLaunchSchemeArgsEnv = "YES"
+      shouldUseLaunchSchemeArgsEnv = "NO"
+      enableThreadSanitizer = "YES"
      codeCoverageEnabled = "YES">
      <MacroExpansion>
         <BuildableReference
@ -43,8 +44,49 @@
            <BuildableReference
               BuildableIdentifier = "primary"
               BlueprintIdentifier = "AF8ED1F82757821000B8DBC4"
-               BuildableName = "NextcloudTests.xctest"
-               BlueprintName = "NextcloudTests"
+               BuildableName = "NextcloudUnitTests.xctest"
+               BlueprintName = "NextcloudUnitTests"
+               ReferencedContainer = "container:Nextcloud.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "C0046CD92A17B98400D87C9D"
+               BuildableName = "NextcloudUITests.xctest"
+               BlueprintName = "NextcloudUITests"
+               ReferencedContainer = "container:Nextcloud.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "C04E2F1F2A17BB4D001BAD85"
+               BuildableName = "NextcloudIntegrationTests.xctest"
+               BlueprintName = "NextcloudIntegrationTests"
+               ReferencedContainer = "container:Nextcloud.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "C04E2F2C2A17BB77001BAD85"
+               BuildableName = "NextcloudEndToEndTests.xctest"
+               BlueprintName = "NextcloudEndToEndTests"
+               ReferencedContainer = "container:Nextcloud.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "F31F69412A2F6D4500162F76"
+               BuildableName = "NextcloudSnapshotTests.xctest"
+               BlueprintName = "NextcloudSnapshotTests"
               ReferencedContainer = "container:Nextcloud.xcodeproj">
            </BuildableReference>
         </TestableReference>
@ -54,6 +96,7 @@
      buildConfiguration = "Debug"
      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      enableThreadSanitizer = "YES"
      launchStyle = "0"
      useCustomWorkingDirectory = "NO"
      ignoresPersistentStateOnLaunch = "NO"
--- a/Nextcloud.xcodeproj/xcshareddata/xcschemes/Notification
+++ b/Nextcloud.xcodeproj/xcshareddata/xcschemes/Notification
@ -43,6 +43,50 @@
      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
      shouldUseLaunchSchemeArgsEnv = "YES">
      <Testables>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "C0046CD92A17B98400D87C9D"
+               BuildableName = "NextcloudUITests.xctest"
+               BlueprintName = "NextcloudUITests"
+               ReferencedContainer = "container:Nextcloud.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "C04E2F1F2A17BB4D001BAD85"
+               BuildableName = "NextcloudIntegrationTests.xctest"
+               BlueprintName = "NextcloudIntegrationTests"
+               ReferencedContainer = "container:Nextcloud.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "C04E2F2C2A17BB77001BAD85"
+               BuildableName = "NextcloudEndToEndTests.xctest"
+               BlueprintName = "NextcloudEndToEndTests"
+               ReferencedContainer = "container:Nextcloud.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "F31F69412A2F6D4500162F76"
+               BuildableName = "NextcloudSnapshotTests.xctest"
+               BlueprintName = "NextcloudSnapshotTests"
+               ReferencedContainer = "container:Nextcloud.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
      </Testables>
   </TestAction>
   <LaunchAction
--- a/Nextcloud.xcodeproj/xcshareddata/xcschemes/Share.xcscheme
+++ b/Nextcloud.xcodeproj/xcshareddata/xcschemes/Share.xcscheme
@ -57,8 +57,52 @@
            <BuildableReference
               BuildableIdentifier = "primary"
               BlueprintIdentifier = "AF8ED1F82757821000B8DBC4"
-               BuildableName = "NextcloudTests.xctest"
-               BlueprintName = "NextcloudTests"
+               BuildableName = "NextcloudUnitTests.xctest"
+               BlueprintName = "NextcloudUnitTests"
+               ReferencedContainer = "container:Nextcloud.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "C0046CD92A17B98400D87C9D"
+               BuildableName = "NextcloudUITests.xctest"
+               BlueprintName = "NextcloudUITests"
+               ReferencedContainer = "container:Nextcloud.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "C04E2F1F2A17BB4D001BAD85"
+               BuildableName = "NextcloudIntegrationTests.xctest"
+               BlueprintName = "NextcloudIntegrationTests"
+               ReferencedContainer = "container:Nextcloud.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "C04E2F2C2A17BB77001BAD85"
+               BuildableName = "NextcloudEndToEndTests.xctest"
+               BlueprintName = "NextcloudEndToEndTests"
+               ReferencedContainer = "container:Nextcloud.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "F31F69412A2F6D4500162F76"
+               BuildableName = "NextcloudSnapshotTests.xctest"
+               BlueprintName = "NextcloudSnapshotTests"
               ReferencedContainer = "container:Nextcloud.xcodeproj">
            </BuildableReference>
         </TestableReference>
--- a/Nextcloud.xcodeproj/xcshareddata/xcschemes/Widget.xcscheme
+++ b/Nextcloud.xcodeproj/xcshareddata/xcschemes/Widget.xcscheme
@ -43,6 +43,50 @@
      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
      shouldUseLaunchSchemeArgsEnv = "YES">
      <Testables>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "C0046CD92A17B98400D87C9D"
+               BuildableName = "NextcloudUITests.xctest"
+               BlueprintName = "NextcloudUITests"
+               ReferencedContainer = "container:Nextcloud.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "C04E2F1F2A17BB4D001BAD85"
+               BuildableName = "NextcloudIntegrationTests.xctest"
+               BlueprintName = "NextcloudIntegrationTests"
+               ReferencedContainer = "container:Nextcloud.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "C04E2F2C2A17BB77001BAD85"
+               BuildableName = "NextcloudEndToEndTests.xctest"
+               BlueprintName = "NextcloudEndToEndTests"
+               ReferencedContainer = "container:Nextcloud.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO"
+            parallelizable = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "F31F69412A2F6D4500162F76"
+               BuildableName = "NextcloudSnapshotTests.xctest"
+               BlueprintName = "NextcloudSnapshotTests"
+               ReferencedContainer = "container:Nextcloud.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
      </Testables>
   </TestAction>
   <LaunchAction
--- a/README.md
+++ b/README.md
@ -79,3 +79,53 @@ If you need assistance or want to ask a question about the iOS app, you are welc
 Do you want to try the latest version in development of Nextcloud iOS ? Simple, follow this simple step

 [Apple TestFlight](https://testflight.apple.com/join/RXEJbWj9)
+
+## Testing
+
+#### Note: If a Unit or Integration test exclusively uses and tests NextcloudKit functions and components, then write that test in the NextcloudKit repo. NextcloudKit is used in many other repos as an API, and it's better if such tests are located there.
+
+### Unit tests:
+
+There are currently no preresquites for unit testing that need to be done. Mock everything that's not needed. 
+
+### Integration tests:
+To run integration tests, we need a docker instance of a Nextcloud test server.
+The CI does all this automatically, but to do it manually:
+1. Run `docker run --rm -d -p 8080:80 ghcr.io/juliushaertl/nextcloud-dev-php80:latest` to spin up a docker container of the Nextcloud test server.
+2. Log in on the test server and generate an app password for device. There are a couple test accounts, but `admin` as username and password works best.
+3. Build the iOS project once. This will generate an `.env-vars` file in the root directory. It contains env vars that the project will use for testing.
+4. Provide proper values for the env vars inside the file. Here is an example:
+```
+export TEST_SERVER_URL=http://localhost:8080
+export TEST_USER=nextcloud
+export TEST_PASSWORD=FAeSR-6Jk7s-DzLny-CCQHL-f49BP
+```
+5. Build the iOS project again. If all the values are set correctly you will see a generated file called `EnvVars.generated.swift`. It contains the env vars as Swift fields that can be easily used in code:
+```
+/**
+This is generated from the .env-vars file in the root directory. If there is an environment variable here that is needed and not filled, please look into this file.
+ */
+ public struct EnvVars {
+  static let testUser = "nextcloud"
+  static let testPassword = "FAeSR-6Jk7s-DzLny-CCQHL-f49BP"
+  static let testServerUrl = "http://localhost:8080"
+}
+```
+6. You can now run the integration tests. They will use the env vars to connect to the test server to do the testing. 
+
+
+### UI tests
+
+UI tests also use the docker server, but besides that there is nothing else you need to do.
+
+### Snapshot tests
+
+Snapshot tests are made via this library: https://github.com/pointfreeco/swift-snapshot-testing and these 2 extensions:
+1. https://github.com/doordash-oss/swiftui-preview-snapshots - for creating SwiftUI snapshot tests via previews.
+2. https://github.com/alexey1312/SnapshotTestingHEIC - makes snapshot images HEIC instead of PNGs for much reduced size.
+
+Snapshot tests are a great way to test if UI elements are consistent with designs and don't break with new commits, but they can be very finicky and the smallest change can cause them to fail. Keep in mind:
+
+- For SwiftUI snapshot tests, It's always a good idea to utilize previews, as they do not depend on device/app state and it has less chances to fail due to wrong state.
+
+- For UIKit snapshot tests, try to include mock dependencies to always make sure the UI is rendered the same way. Even a text change can cause the tests to fail.
--- a/Sourcery/EnvVars.stencil
+++ b/Sourcery/EnvVars.stencil
@ -0,0 +1,18 @@
+//
+//  EnvVars.stencil.swift
+//  NextcloudIntegrationTests
+//
+//  Created by Milen on 31.05.23.
+//  Copyright © 2023 Marino Faggiana. All rights reserved.
+//
+
+import Foundation
+
+/**
+This is generated from the .env-vars file in the root directory. If there is an environment variable here that is needed and not filled, please look into this file.
+ */
+ public struct EnvVars {
+  static let testUser = "{{ argument.TEST_USER }}"
+  static let testAppPassword = "{{ argument.TEST_APP_PASSWORD }}"
+  static let testServerUrl = "{{ argument.TEST_SERVER_URL }}"
+}
--- a/Sourcery/bin/sourcery
+++ b/Sourcery/bin/sourcery
--- a/Tests/NextcloudIntegrationTests/FilesIntegrationTests.swift
+++ b/Tests/NextcloudIntegrationTests/FilesIntegrationTests.swift
@ -0,0 +1,81 @@
+//
+//  NextcloudIntegrationTests.swift
+//  NextcloudIntegrationTests
+//
+//  Created by Milen Pivchev on 5/19/23.
+//  Copyright © 2023 Marino Faggiana. All rights reserved.
+//
+
+import XCTest
+import NextcloudKit
+@testable import Nextcloud
+
+final class FilesIntegrationTests: XCTestCase {
+    private let baseUrl = EnvVars.testServerUrl
+    private let user = EnvVars.testUser
+    private let userId = EnvVars.testUser
+    private let password = EnvVars.testAppPassword
+    private lazy var account = "\(userId) \(baseUrl)"
+
+    private let appDelegate = (UIApplication.shared.delegate as? AppDelegate)!
+
+    override func setUp() {
+        appDelegate.deleteAllAccounts()
+    }
+
+    func test_createReadDeleteFolder_withProperParams_shouldCreateReadDeleteFolder() throws {
+        let expectation = expectation(description: "Should finish last callback")
+
+        let folderName = "TestFolder10"
+        let serverUrl = "\(baseUrl)/remote.php/dav/files/\(userId)"
+        let serverUrlFileName = "\(serverUrl)/\(folderName)"
+
+        NextcloudKit.shared.setup(account: account, user: user, userId: userId, password: password, urlBase: baseUrl)
+
+        // Test creating folder
+        NCNetworking.shared.createFolder(fileName: folderName, serverUrl: serverUrl, account: account, urlBase: baseUrl, userId: userId, withPush: true) { error in
+            XCTAssertEqual(NKError.success.errorCode, error.errorCode)
+            XCTAssertEqual(NKError.success.errorDescription, error.errorDescription)
+
+            Thread.sleep(forTimeInterval: 0.2)
+
+            // Test reading folder, should exist
+            NCNetworking.shared.readFolder(serverUrl: serverUrlFileName, account: self.user) { account, metadataFolder, metadatas, metadatasUpdate, metadatasLocalUpdate, metadatasDelete, error in
+                XCTAssertEqual(self.account, account)
+                XCTAssertEqual(NKError.success.errorCode, error.errorCode)
+                XCTAssertEqual(NKError.success.errorDescription, error.errorDescription)
+                XCTAssertEqual(metadataFolder?.fileName, folderName)
+
+                // Check Realm directory, should exist
+                let directory = NCManageDatabase.shared.getTableDirectory(predicate: NSPredicate(format: "serverUrl == %@", serverUrlFileName))
+                XCTAssertNotNil(directory)
+
+                Thread.sleep(forTimeInterval: 0.2)
+
+                Task {
+                    // Test deleting folder
+                    await _ = NCNetworking.shared.deleteMetadata(metadataFolder!, onlyLocalCache: false)
+
+                    XCTAssertEqual(NKError.success.errorCode, error.errorCode)
+                    XCTAssertEqual(NKError.success.errorDescription, error.errorDescription)
+
+                    try await Task.sleep(for: .milliseconds(200))
+
+                    // Test reading folder, should NOT exist
+                    NCNetworking.shared.readFolder(serverUrl: serverUrlFileName, account: self.user) { account, metadataFolder, metadatas, metadatasUpdate, metadatasLocalUpdate, metadatasDelete, error in
+                        defer { expectation.fulfill() }
+
+                        XCTAssertEqual(404, error.errorCode)
+                        XCTAssertNil(metadataFolder?.fileName)
+
+                        // Check Realm directory, should NOT exist
+                        let directory = NCManageDatabase.shared.getTableDirectory(predicate: NSPredicate(format: "serverUrl == %@", serverUrlFileName))
+                        XCTAssertNil(directory)
+                    }
+                }
+            }
+        }
+        
+        waitForExpectations(timeout: 100)
+    }
+}
--- a/Tests/NextcloudIntegrationTests/LoginIntegrationTests.swift
+++ b/Tests/NextcloudIntegrationTests/LoginIntegrationTests.swift
@ -0,0 +1,83 @@
+//
+//  NextcloudIntegrationTests.swift
+//  NextcloudIntegrationTests
+//
+//  Created by Milen Pivchev on 5/19/23.
+//  Copyright © 2023 Marino Faggiana. All rights reserved.
+//
+
+import XCTest
+import NextcloudKit
+@testable import Nextcloud
+
+final class LoginIntegrationTests: XCTestCase {
+    private let baseUrl = EnvVars.testServerUrl
+    private let user = EnvVars.testUser
+    private let userId = EnvVars.testUser
+    private let password = EnvVars.testAppPassword
+    private lazy var account = "\(userId) \(baseUrl)"
+
+    private let appDelegate = (UIApplication.shared.delegate as? AppDelegate)!
+
+    override func setUp() {
+        appDelegate.deleteAllAccounts()
+    }
+
+    func test_createReadDeleteFolder_withProperParams_shouldCreateReadDeleteFolder() throws {
+        let expectation = expectation(description: "Should finish last callback")
+
+        let folderName = "TestFolder10"
+        let serverUrl = "\(baseUrl)/remote.php/dav/files/\(userId)"
+        let serverUrlFileName = "\(serverUrl)/\(folderName)"
+
+        NextcloudKit.shared.setup(account: account, user: user, userId: userId, password: password, urlBase: baseUrl)
+
+        // Test creating folder
+        NCNetworking.shared.createFolder(fileName: folderName, serverUrl: serverUrl, account: account, urlBase: baseUrl, userId: userId, withPush: true) { error in
+            XCTAssertEqual(NKError.success.errorCode, error.errorCode)
+            XCTAssertEqual(NKError.success.errorDescription, error.errorDescription)
+
+            Thread.sleep(forTimeInterval: 0.2)
+
+            // Test reading folder, should exist
+            NCNetworking.shared.readFolder(serverUrl: serverUrlFileName, account: self.user) { account, metadataFolder, metadatas, metadatasUpdate, metadatasLocalUpdate, metadatasDelete, error in
+                XCTAssertEqual(self.account, account)
+                XCTAssertEqual(NKError.success.errorCode, error.errorCode)
+                XCTAssertEqual(NKError.success.errorDescription, error.errorDescription)
+                XCTAssertEqual(metadataFolder?.fileName, folderName)
+
+                // Check Realm directory, should exist
+                let directory = NCManageDatabase.shared.getTableDirectory(predicate: NSPredicate(format: "serverUrl == %@", serverUrlFileName))
+                XCTAssertNotNil(directory)
+
+                Thread.sleep(forTimeInterval: 0.2)
+
+                Task {
+                    // Test deleting folder
+                    await _ = NCNetworking.shared.deleteMetadata(metadataFolder!, onlyLocalCache: false)
+
+                    XCTAssertEqual(NKError.success.errorCode, error.errorCode)
+                    XCTAssertEqual(NKError.success.errorDescription, error.errorDescription)
+
+                    try await Task.sleep(for: .milliseconds(200))
+
+                    // Test reading folder, should NOT exist
+                    NCNetworking.shared.readFolder(serverUrl: serverUrlFileName, account: self.user) { account, metadataFolder, metadatas, metadatasUpdate, metadatasLocalUpdate, metadatasDelete, error in
+                        defer { expectation.fulfill() }
+
+                        XCTAssertEqual(404, error.errorCode)
+                        XCTAssertNil(metadataFolder?.fileName)
+
+                        // Check Realm directory, should NOT exist
+                        let directory = NCManageDatabase.shared.getTableDirectory(predicate: NSPredicate(format: "serverUrl == %@", serverUrlFileName))
+                        XCTAssertNil(directory)
+                    }
+                }
+
+
+            }
+        }
+        
+        waitForExpectations(timeout: 100)
+    }
+}
--- a/Tests/NextcloudSnapshotTests/Extensions/SwiftUIView+Extensions.swift
+++ b/Tests/NextcloudSnapshotTests/Extensions/SwiftUIView+Extensions.swift
@ -0,0 +1,18 @@
+//
+//  SwiftUIView+Extensions.swift
+//  Nextcloud
+//
+//  Created by Milen on 06.06.23.
+//  Copyright © 2023 Marino Faggiana. All rights reserved.
+//
+
+import Foundation
+import SwiftUI
+
+extension SwiftUI.View {
+    func toVC() -> UIViewController {
+        let vc = UIHostingController (rootView: self)
+        vc.view.frame = UIScreen.main.bounds
+        return vc
+    }
+}
--- a/Tests/NextcloudSnapshotTests/NextcloudSnapshotTests.swift
+++ b/Tests/NextcloudSnapshotTests/NextcloudSnapshotTests.swift
@ -0,0 +1,24 @@
+//
+//  NextcloudSnapshotTests.swift
+//  NextcloudSnapshotTests
+//
+//  Created by Milen on 06.06.23.
+//  Copyright © 2023 Marino Faggiana. All rights reserved.
+//
+
+import XCTest
+import SnapshotTesting
+import SnapshotTestingHEIC
+import PreviewSnapshotsTesting
+import SwiftUI
+@testable import Nextcloud
+
+final class NextcloudSnapshotTests: XCTestCase {
+    func test_HUDView() {
+        HUDView_Previews.snapshots.assertSnapshots(as: .imageHEIC)
+    }
+
+    func test_CapalitiesView() {
+        NCCapabilitiesView_Previews.snapshots.assertSnapshots(as: .imageHEIC)
+    }
+}
--- a/Tests/NextcloudSnapshotTests/Snapshots/NextcloudSnapshotTests/test_CapalitiesView.DefaultPreviewConfiguration.heic
+++ b/Tests/NextcloudSnapshotTests/Snapshots/NextcloudSnapshotTests/test_CapalitiesView.DefaultPreviewConfiguration.heic
--- a/Tests/NextcloudSnapshotTests/Snapshots/NextcloudSnapshotTests/test_HUDView.DefaultPreviewConfiguration.heic
+++ b/Tests/NextcloudSnapshotTests/Snapshots/NextcloudSnapshotTests/test_HUDView.DefaultPreviewConfiguration.heic
--- a/Tests/NextcloudUITests/BaseUIXCTestCase.swift
+++ b/Tests/NextcloudUITests/BaseUIXCTestCase.swift
@ -0,0 +1,35 @@
+//
+//  BaseUIXCTestCase.swift
+//  NextcloudUITests
+//
+//  Created by Milen on 20.06.23.
+//  Copyright © 2023 Marino Faggiana. All rights reserved.
+//
+
+import XCTest
+
+class BaseUIXCTestCase: XCTestCase {
+    let timeoutSeconds: Double = 100
+
+    override final class var runsForEachTargetApplicationUIConfiguration: Bool {
+        false
+    }
+
+    internal func waitForEnabled(object: Any?) {
+        let predicate = NSPredicate(format: "enabled == true")
+        expectation(for: predicate, evaluatedWith: object, handler: nil)
+        waitForExpectations(timeout: timeoutSeconds, handler: nil)
+    }
+
+    internal func waitForHittable(object: Any?) {
+        let predicate = NSPredicate(format: "hittable == true")
+        expectation(for: predicate, evaluatedWith: object, handler: nil)
+        waitForExpectations(timeout: timeoutSeconds, handler: nil)
+    }
+
+    internal func waitForEnabledAndHittable(object: Any?) {
+        waitForEnabled(object: object)
+        waitForHittable(object: object)
+    }
+}
+
--- a/Tests/NextcloudUITests/LoginUITests.swift
+++ b/Tests/NextcloudUITests/LoginUITests.swift
@ -0,0 +1,64 @@
+//
+//  NextcloudUITests.swift
+//  NextcloudUITests
+//
+//  Created by Milen Pivchev on 5/19/23.
+//  Copyright © 2023 Marino Faggiana. All rights reserved.
+//
+
+import XCTest
+
+final class LoginUITests: BaseUIXCTestCase {
+    private let baseUrl = EnvVars.testServerUrl
+    private let user = EnvVars.testUser
+    private let userId = EnvVars.testUser
+    private let password = EnvVars.testAppPassword
+    private lazy var account = "\(userId) \(baseUrl)"
+
+    let app = XCUIApplication()
+
+    override func setUp() {
+        app.launchArguments += ["UI_TESTING"]
+    }
+
+    func test_logIn_withProperParams_shouldLogInAndGoToHomeScreen() throws {
+        app.launch()
+
+        let loginButton = app.buttons["Log in"]
+        XCTAssert(loginButton.waitForExistence(timeout: timeoutSeconds))
+        loginButton.tap()
+
+        let serverAddressHttpsTextField = app.textFields["Server address https:// …"]
+        serverAddressHttpsTextField.tap()
+        serverAddressHttpsTextField.typeText(baseUrl)
+        let button = app.windows.children(matching: .other).element.children(matching: .other).element.children(matching: .other).element.children(matching: .other).element.children(matching: .other).element.children(matching: .other).element.children(matching: .button).element(boundBy: 0)
+        button.tap()
+
+        let webViewsQuery = app.webViews.webViews.webViews
+        let loginButton2 = webViewsQuery/*@START_MENU_TOKEN@*/.buttons["Log in"]/*[[".otherElements.matching(identifier: \"Nextcloud\")",".otherElements[\"main\"].buttons[\"Log in\"]",".buttons[\"Log in\"]"],[[[-1,2],[-1,1],[-1,0,1]],[[-1,2],[-1,1]]],[0]]@END_MENU_TOKEN@*/
+        XCTAssert(loginButton2.waitForExistence(timeout: timeoutSeconds))
+        waitForEnabledAndHittable(object: loginButton2)
+        loginButton2.tap()
+
+        let element = webViewsQuery/*@START_MENU_TOKEN@*/.otherElements["main"]/*[[".otherElements[\"Login – Nextcloud\"].otherElements[\"main\"]",".otherElements[\"main\"]"],[[[-1,1],[-1,0]]],[0]]@END_MENU_TOKEN@*/.children(matching: .other).element(boundBy: 1)
+        let usernameTextField = element.children(matching: .other).element(boundBy: 2).children(matching: .textField).element
+        XCTAssert(usernameTextField.waitForExistence(timeout: timeoutSeconds))
+        usernameTextField.tap()
+        usernameTextField.typeText(user)
+        let passwordTextField = element.children(matching: .other).element(boundBy: 4).children(matching: .secureTextField).element
+        passwordTextField.tap()
+        passwordTextField.typeText(user)
+        let loginButton3 = webViewsQuery/*@START_MENU_TOKEN@*/.buttons["Log in"]/*[[".otherElements[\"Login – Nextcloud\"]",".otherElements[\"main\"].buttons[\"Log in\"]",".buttons[\"Log in\"]"],[[[-1,2],[-1,1],[-1,0,1]],[[-1,2],[-1,1]]],[0]]@END_MENU_TOKEN@*/
+        XCTAssert(loginButton3.waitForExistence(timeout: timeoutSeconds))
+        loginButton3.tap()
+
+        let grantAccessButton = webViewsQuery/*@START_MENU_TOKEN@*/.buttons["Grant access"]/*[[".otherElements.matching(identifier: \"Nextcloud\")",".otherElements[\"main\"].buttons[\"Grant access\"]",".buttons[\"Grant access\"]"],[[[-1,2],[-1,1],[-1,0,1]],[[-1,2],[-1,1]]],[0]]@END_MENU_TOKEN@*/
+        XCTAssert(grantAccessButton.waitForExistence(timeout: timeoutSeconds))
+        waitForEnabledAndHittable(object: grantAccessButton)
+        grantAccessButton.tap()
+
+        // Check if we are in the home screen
+        XCTAssert(app.navigationBars["Nextcloud"].waitForExistence(timeout: timeoutSeconds))
+        XCTAssert(app.tabBars["Tab Bar"].waitForExistence(timeout: timeoutSeconds))
+    }
+}
--- a/Tests/NextcloudUnitTests/NextcloudUnitTests.swift
+++ b/Tests/NextcloudUnitTests/NextcloudUnitTests.swift
@ -8,7 +8,7 @@

 import XCTest

-class NextcloudTests: XCTestCase {
+class NextcloudUnitTests: XCTestCase {

    override func setUpWithError() throws {
        // Put setup code here. This method is called before the invocation of each test method in the class.
--- a/create-docker-test-server.sh
+++ b/create-docker-test-server.sh
@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+#This script creates a testable Docker enviroment of the Nextcloud server, and is used by the CI for tests.
+
+container_name="nextcloud_test"
+port=8080
+server_url="http://localhost:${port}"
+user="admin"
+
+docker run --rm -d --name $container_name -p $port:80 ghcr.io/juliushaertl/nextcloud-dev-php80:latest
+
+timeout=300
+elapsed=0
+
+echo "Waiting for server..."
+
+sleep 2
+
+while true; do
+    content=$(curl -s $server_url/status.php)
+
+    if [[ $content == *"installed\":true"* ]]; then
+        break
+    fi
+
+    elapsed=$((elapsed + 1))
+
+    if [ $elapsed -ge $timeout ]; then
+        echo "No success after $timeout seconds."
+        exit 1
+    fi
+
+    sleep 1
+done
+
+echo "Server is installed."
+echo "Exporting env vars..."
+
+sleep 2
+
+password=$(docker exec -e NC_PASS=$user $container_name sudo -E -u www-data php /var/www/html/occ user:add-app-password $user --password-from-env | tail -1)
+
+export TEST_APP_PASSWORD=$password
+export TEST_SERVER_URL=$server_url
+export TEST_USER=$user
+
+echo "TEST_SERVER_URL: ${TEST_SERVER_URL}"
+echo "TEST_USER: ${TEST_USER}"
+echo "TEST_APP_PASSWORD: ${TEST_APP_PASSWORD}"
+echo "Env vars exported."
--- a/iOSClient/AppDelegate.swift
+++ b/iOSClient/AppDelegate.swift
@ -59,7 +59,16 @@ class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterD

    private var privacyProtectionWindow: UIWindow?

+    var isUiTestingEnabled: Bool {
+         get {
+             return ProcessInfo.processInfo.arguments.contains("UI_TESTING")
+         }
+     }
+
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
+        if isUiTestingEnabled {
+            deleteAllAccounts()
+        }

        NCSettingsBundleHelper.checkAndExecuteSettings(delay: 0)

@ -625,6 +634,13 @@ class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterD
        }
    }

+    @objc func deleteAllAccounts() {
+        let accounts = NCManageDatabase.shared.getAccounts()
+        accounts?.forEach({ account in
+            deleteAccount(account, wipe: true)
+        })
+    }
+
    @objc func changeAccount(_ account: String) {

        NCManageDatabase.shared.setAccountActive(account)
--- a/iOSClient/Diagnostics/NCCapabilitiesView.swift
+++ b/iOSClient/Diagnostics/NCCapabilitiesView.swift
@ -8,6 +8,7 @@

 import SwiftUI
 import NextcloudKit
+import PreviewSnapshots

@objc class NCHostingCapabilitiesView: NSObject {

@ -35,13 +36,6 @@ class NCCapabilitiesViewOO: ObservableObject {
    @Published var homeServer = ""

    init() {
-
-        if ProcessInfo.processInfo.environment["XCODE_RUNNING_FOR_PREVIEWS"] == "1" {
-            capabililies = [Capability(text: "Collabora", image: UIImage(named: "collabora")!, resize: true, available: true),
-                            Capability(text: "XXX site", image: UIImage(systemName: "lock.shield")!, resize: false, available: false)
-            ]
-            homeServer = "https://cloud.nextcloud.com/remote.php.dav/files/marino/"
-        } else {
        guard let activeAccount = NCManageDatabase.shared.getActiveAccount() else { return }
        var textEditor = false
        var onlyofficeEditors = false
@ -100,7 +94,6 @@ class NCCapabilitiesViewOO: ObservableObject {
        homeServer = NCUtilityFileSystem.shared.getHomeServer(urlBase: activeAccount.urlBase, userId: activeAccount.userId) + "/"
    }
 }
-}

 struct NCCapabilitiesView: View {

@ -175,6 +168,26 @@ struct NCCapabilitiesView: View {

 struct NCCapabilitiesView_Previews: PreviewProvider {
    static var previews: some View {
-        NCCapabilitiesView(capabilitiesStatus: NCCapabilitiesViewOO())
+        snapshots.previews.previewLayout(.device)
+    }
+
+    static var snapshots: PreviewSnapshots<String> {
+        PreviewSnapshots(
+            configurations: [
+                .init(name: NCGlobal.shared.defaultSnapshotConfiguration, state: "")
+            ],
+            configure: { _ in
+                NCCapabilitiesView(capabilitiesStatus: getCapabilitiesViewOOForPreview()).padding(.top, 20).frameForPreview()
+            })
    }
 }
+
+func getCapabilitiesViewOOForPreview() -> NCCapabilitiesViewOO {
+    let capabilitiesViewOO = NCCapabilitiesViewOO()
+    capabilitiesViewOO.capabililies = [
+        NCCapabilitiesViewOO.Capability(text: "Collabora", image: UIImage(named: "collabora")!, resize: true, available: true),
+        NCCapabilitiesViewOO.Capability(text: "XXX site", image: UIImage(systemName: "lock.shield")!, resize: false, available: false)
+    ]
+    capabilitiesViewOO.homeServer = "https://cloud.nextcloud.com/remote.php.dav/files/marino/"
+    return capabilitiesViewOO
+}
--- a/iOSClient/Extensions/Optional+Extensions.swift
+++ b/iOSClient/Extensions/Optional+Extensions.swift
--- a/iOSClient/Extensions/View+Extension.swift
+++ b/iOSClient/Extensions/View+Extension.swift
@ -24,8 +24,13 @@
 import SwiftUI

 extension View {
-
    func complexModifier<V: View>(@ViewBuilder _ closure: (Self) -> V) -> some View {
        closure(self)
    }
+
+    /// Use this on preview views that are used in snapshot testing. It prevents the snapashot library from complaining that the view has a size of 0
+    /// Check: https://github.com/pointfreeco/swift-snapshot-testing/issues/738
+    func frameForPreview() -> some View {
+        return frame(width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height)
+    }
 }
--- a/iOSClient/GUI/HUDView.swift
+++ b/iOSClient/GUI/HUDView.swift
@ -22,6 +22,7 @@
 //

 import SwiftUI
+import PreviewSnapshots

 struct HUDView: View {

@ -93,6 +94,16 @@ struct ContentView: View {

 struct HUDView_Previews: PreviewProvider {
    static var previews: some View {
-        ContentView()
+        snapshots.previews.previewLayout(.sizeThatFits)
+    }
+
+    static var snapshots: PreviewSnapshots<String> {
+        PreviewSnapshots(
+            configurations: [
+                .init(name: NCGlobal.shared.defaultSnapshotConfiguration, state: "")
+            ],
+            configure: { _ in
+                ContentView().frameForPreview()
+            })
    }
 }
--- a/iOSClient/NCGlobal.swift
+++ b/iOSClient/NCGlobal.swift
@ -441,4 +441,7 @@ class NCGlobal: NSObject {
    @objc var capabilityUserStatusEnabled: Bool                 = false
    var capabilityExternalSites: Bool                           = false
    var capabilityGroupfoldersEnabled: Bool                     = false // NC27
+
+    // SNAPSHOT PREVIEW
+    let defaultSnapshotConfiguration = "DefaultPreviewConfiguration"
 }