flutter/packages/flutter/test/services/text_input_test.dart

// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:flutter/services.dart';
import 'package:flutter_test/flutter_test.dart' show TestWidgetsFlutterBinding;
import '../flutter_test_alternative.dart';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  group('TextInputConfiguration', () {
    test('sets expected defaults', () {
      const TextInputConfiguration configuration = TextInputConfiguration();
      expect(configuration.inputType, TextInputType.text);
      expect(configuration.obscureText, false);
      expect(configuration.autocorrect, true);
      expect(configuration.actionLabel, null);
      expect(configuration.textCapitalization, TextCapitalization.none);
      expect(configuration.keyboardAppearance, Brightness.light);
    });

    test('text serializes to JSON', () async {
      const TextInputConfiguration configuration = TextInputConfiguration(
        inputType: TextInputType.text,
        obscureText: true,
        autocorrect: false,
        actionLabel: 'xyzzy',
      );
      final Map<String, dynamic> json = configuration.toJson();
      expect(json['inputType'], <String, dynamic>{
        'name': 'TextInputType.text',
        'signed': null,
        'decimal': null,
      });
      expect(json['obscureText'], true);
      expect(json['autocorrect'], false);
      expect(json['actionLabel'], 'xyzzy');
    });

    test('number serializes to JSON', () async {
      const TextInputConfiguration configuration = TextInputConfiguration(
        inputType: TextInputType.numberWithOptions(decimal: true),
        obscureText: true,
        autocorrect: false,
        actionLabel: 'xyzzy',
      );
      final Map<String, dynamic> json = configuration.toJson();
      expect(json['inputType'], <String, dynamic>{
        'name': 'TextInputType.number',
        'signed': false,
        'decimal': true,
      });
      expect(json['obscureText'], true);
      expect(json['autocorrect'], false);
      expect(json['actionLabel'], 'xyzzy');
    });

    test('basic structure', () async {
      const TextInputType text = TextInputType.text;
      const TextInputType number = TextInputType.number;
      const TextInputType number2 = TextInputType.numberWithOptions();
      const TextInputType signed = TextInputType.numberWithOptions(signed: true);
      const TextInputType signed2 = TextInputType.numberWithOptions(signed: true);
      const TextInputType decimal = TextInputType.numberWithOptions(decimal: true);
      const TextInputType signedDecimal =
        TextInputType.numberWithOptions(signed: true, decimal: true);

      expect(text.toString(), 'TextInputType(name: TextInputType.text, signed: null, decimal: null)');
      expect(number.toString(), 'TextInputType(name: TextInputType.number, signed: false, decimal: false)');
      expect(signed.toString(), 'TextInputType(name: TextInputType.number, signed: true, decimal: false)');
      expect(decimal.toString(), 'TextInputType(name: TextInputType.number, signed: false, decimal: true)');
      expect(signedDecimal.toString(), 'TextInputType(name: TextInputType.number, signed: true, decimal: true)');

      expect(text == number, false);
      expect(number == number2, true);
      expect(number == signed, false);
      expect(signed == signed2, true);
      expect(signed == decimal, false);
      expect(signed == signedDecimal, false);
      expect(decimal == signedDecimal, false);

      expect(text.hashCode == number.hashCode, false);
      expect(number.hashCode == number2.hashCode, true);
      expect(number.hashCode == signed.hashCode, false);
      expect(signed.hashCode == signed2.hashCode, true);
      expect(signed.hashCode == decimal.hashCode, false);
      expect(signed.hashCode == signedDecimal.hashCode, false);
      expect(decimal.hashCode == signedDecimal.hashCode, false);
    });

    test('The framework TextInputConnection closes when the platform loses its input connection', () async {
      // Assemble a TextInputConnection so we can verify its change in state.
      final TextInputClient client = NoOpTextInputClient();
      const TextInputConfiguration configuration = TextInputConfiguration();
      final TextInputConnection textInputConnection = TextInput.attach(client, configuration);

      // Verify that TextInputConnection think its attached to a client. This is
      // an intermediate verification of expected state.
      expect(textInputConnection.attached, true);

      // Pretend that the platform has lost its input connection.
      final ByteData messageBytes = const JSONMessageCodec().encodeMessage(
          <String, dynamic>{
            'args': <dynamic>[1],
            'method': 'TextInputClient.onConnectionClosed',
          }
      );
      ServicesBinding.instance.defaultBinaryMessenger.handlePlatformMessage(
        'flutter/textinput',
        messageBytes,
        (ByteData _) {},
      );

      // Verify that textInputConnection no longer think its attached to an input
      // connection. This is the critical verification of this test.
      expect(textInputConnection.attached, false);
    });
  });
}

class NoOpTextInputClient extends TextInputClient {
  @override
  void performAction(TextInputAction action) {}

  @override
  void updateEditingValue(TextEditingValue value) {}

  @override
  void updateFloatingCursor(RawFloatingCursorPoint point) {}
}