using the system back button from flutter driver

Question

How can I use the system back button in an integration test?

So I'm using flutter and am writing integration tests, in most circumstances I can use the AppBar navigation, finding it by tool tip looks like this :

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

But one of my tests opens a web page, after this opens I need to carry on with my tests which means I need to press the system back button, is this possible?

many thanks

Coati

Answer 1

If you have adb installed on your machine, you can run a command to perform the backpress using a keyevent:

import 'dart:io';

await Process.run(
  'adb', 
  <String>['shell', 'input', 'keyevent', 'KEYCODE_BACK'], 
  runInShell: true,
);

Swaziland

what about iPhones? how can we press the home button etc.. programmatically – Globate

iPhone's home button is not a back button, it directs the user to the device home. If you want to test the equivalent of a backpress on iOS you may want to try a drag from right to left. – Swaziland

is there any way to press the Home screen on iPhone programmatically? – Globate

Answer 2

Maybe this can help you

 await device.shellExec('input', <String>['keyevent', 'KEYCODE_BACK']);

Found in one of the official flutter driver tests link

Forestry

Seems that the device.shellExec depends on the flutter_devicelab which is only available within the framework – Swaziland

Answer 3

Check out this link. In short, you'll need to use WillPopScope class that handles device back button with callbacks.

Wilding

not applicable from flutter driver, im aware of willPopScope and its usage but thank you – Coati