Unable to enter values in PinCodeTextField within widget test

[KennethMurugu]

I am attempting to find the PinCodeTextField by key and then setting its text value.

PinCodeTextField in my screen

PinCodeTextField(
                  key: Key('otp-field'),
                  animationType: AnimationType.scale,
                  keyboardType: TextInputType.number,
                  appContext: context,
                  autoFocus: true,
                  validator: (value) {
                    if (value!.length < 6) {
                      return 'Please enter a valid OTP';
                    }
                    return null;
                  },
                  errorTextSpace: 20,
                  pinTheme: PinTheme(
                    shape: PinCodeFieldShape.box,
                    borderRadius: BorderRadius.circular(8),
                    fieldHeight: 50,
                    fieldWidth: 40,
                    errorBorderColor: Theme.of(context).colorScheme.error,
                    activeFillColor: Theme.of(context).colorScheme.secondary,
                    selectedFillColor: Theme.of(context).colorScheme.primary,
                    selectedColor: Theme.of(context).colorScheme.primary,
                    activeColor: Theme.of(context).colorScheme.secondary,
                    inactiveColor: Theme.of(context).dividerColor,
                  ),
                  length: 6,
                  onCompleted: (value) {
                     //onCompleted
                   },
                  onChanged: (value) {

                  },
                ),

Widget test code

// ...
Finder findExpect(String key, {bool many = false}) {
  var finder = find.byKey(ValueKey(key));
  expect(finder, many ? findsWidgets : findsOneWidget);
  return finder;
}
// ...
var fieldOtp = findExpect('otp-field');

await tester.tap(fieldOtp);
await tester.pumpAndSettle();
await tester.enterText(fieldOtp, '000111');
await tester.pumpAndSettle();

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