Restart app doesn't respect processArguments

The problem

We passed processArguments to iOS app and we implemented mock feature there. Process arguments are passed as follows.

config.capabilities = [
{
  deviceName: 'iPhone 13',
  platformVersion: '15.4',
  automationName: 'XCUITest',
  ...
  processArguments: { 'args': ['--mock-fes-api', '--mock-attester-api'] },
},

Passing process arguments work well. But when I try to restart app with below code restarted session doesn’t respect processArguments and treat like normal app. I also tried with closeApp and activeApp functions though.

await driver.terminateApp(CommonData.bundleId.id);
await driver.activateApp(CommonData.bundleId.id);

Environment

• Appium version (or git revision) that exhibits the issue: 1.22.3
• Last Appium version that did not exhibit the issue (if applicable): 1.22.3
• Desktop OS/version used to run Appium: Monterey 12.3.1
• Node.js version (unless using Appium.app|exe): 14.17.6
• Npm or Yarn package manager: 6.14.15
• Mobile platform/version under test: iOS 15.4
• Real device or emulator/simulator: Simulator
• Appium CLI or Appium.app|exe: CLI

Link to Appium logs

https://gist.github.com/ioanmo226/14ba87c198383fa66ca2d833db3d417a

[KazuCocoa]

activateApp is not designed to set arguments except for bundleId/appPackage (in android).

https://github.com/appium/appium-xcuitest-driver#mobile-launchapp is to give environment arguments in the middle of a session in starting an app process for iOS.

[mykola-mokhnach]

The main purpose of activateApp call is to bring an app from the background to the foreground. It does not really care about arguments.

Use a combination of terminateApp/launchApp (with appropriate options) as @KazuCocoa mentioned above to achieve your goal.