_textFieldSubject
        // .map((item) => 'item:$item')
        // .where((item) => item.length > 9)
        .debounceTime(Duration(milliseconds: 500))
        .listen((data) => print(data));

import 'package:flutter_driver/flutter_driver.dart';
import 'package:test_api/test_api.dart';

void main() {
  group('App', () {
    FlutterDriver driver;

    final actionChip = find.byValueKey('actionChip');
    final actionChipLabelText = find.byValueKey('actionChipLabelText');

    setUpAll(() async {
      driver = await FlutterDriver.connect();
    });

    tearDownAll(() async {
      if (driver != null) {
        driver.close();
      }
    });

    test('starts at 0', () async {
      expect(await driver.getText(actionChipLabelText), '0');
    });

    test('increaments the counter', () async {
      await driver.tap(actionChip);
      expect(await driver.getText(actionChipLabelText), '1');
    });
  });
}

The name 'find' is defined in the libraries 'package:flutter_driver/src/driver/driver.dart' and 'package:flutter_test/src/finders.dart'.
Try using 'as prefix' for one of the import directives, or hiding the name from all but one of the imports.dart(ambiguous_import)

import 'package:flutter_driver/flutter_driver.dart';
import 'package:flutter_test/flutter_test.dart' hide group, find;
import 'package:test_api/test_api.dart' show group;

dev_dependencies:
  flutter_test:
    sdk: flutter
  flutter_driver:
    sdk: flutter
  test: ^1.6.1  #这里
  intl_translation: ^0.17.4

Because every version of flutter_driver from sdk depends on test_api 0.2.4 and test >=1.6.2 depends on test_api 0.2.5, flutter_driver from sdk is incompatible with test >=1.6.2.

So, because flutter.toBeMaster.step01 depends on both test ^1.6.3 and flutter_driver any from sdk, version solving failed.
pub get failed (1)

Because every version of flutter_driver from sdk depends on test_api 0.2.4 and test >=1.6.2 depends on test_api 0.2.5, flutter_driver from sdk is incompatible with test >=1.6.2.

So, because flutter.toBeMaster.step01 depends on both test ^1.6.2 and flutter_driver any from sdk, version solving failed.
pub get failed (1)

import 'package:flutter_driver/flutter_driver.dart';
// import 'package:flutter_test/flutter_test.dart' hide group, find;
// import 'package:test_api/test_api.dart' show group;
import 'package:test/test.dart';

Theme(
                  data: Theme.of(context).copyWith(
                    // buttonColor: Theme.of(context).accentColor,
                    buttonTheme: ButtonThemeData(
                      buttonColor: Theme.of(context).accentColor,
                      textTheme: ButtonTextTheme.primary,
                      // shape: BeveledRectangleBorder(
                      //   borderRadius: BorderRadius.circular(5.0),
                      // )
                      shape:StadiumBorder(),
                    ),
                  ),
                  child: RaisedButton(
                  child: Text('Button'),
                  onPressed: () {},
                  splashColor: Colors.grey,
                  elevation: 0.0,
                  // color: Theme.of(context).accentColor,
                  // textColor: Colors.white,
                  // textTheme: ButtonTextTheme.primary,
                ),
                ),