How to find iOS back button programatically with FlutterDriver

Question

I'm using FlutterDriver to perform integration testing for a Flutter package.

When the platform is Android, an AppBar is used in the scaffold, and when the platform is iOS, a CupertinoNavigationBar is used.

When testing on Android I can find the back button with the following code

await driver.tap(find.byTooltip('Back'));

However this fails on iOS. As the button is generated automatically I'm unable to add a tag programatically. Any suggestions for how to select it on iOS? Bonus points for cross-platform solutions.

Also, any suggestions for simulating an android-device back button tap (outside of the app)?

Answer 1

await driver.tap(find.pageBack());

Answer 2

Unfortunately the accepted solution await driver.tap(find.pageBack()) didn't work for me.

So I added Key to the AppBar and accessed the BackButton like below

  final appBar = find.byValueKey("appBarKey");
  await driver.waitFor(appBar);

  final back = find.descendant(
    of: appBar,
    matching: find.byType('BackButton'),
    firstMatchOnly: true,
  );

  await driver.tap(back);