test_text_input_test.dart 1.28 KB
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// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_test/flutter_test.dart';

void main() {
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  testWidgets('receiveAction() forwards exception when exception occurs during action processing', (WidgetTester tester) async {
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    // Setup a widget that can receive focus so that we can open the keyboard.
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    const Widget widget = MaterialApp(
      home: Material(
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        child: TextField(),
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      ),
    );
    await tester.pumpWidget(widget);

    // Keyboard must be shown for receiveAction() to function.
    await tester.showKeyboard(find.byType(TextField));

    // Register a handler for the text input channel that throws an error. This
    // error should be reported within a PlatformException by TestTextInput.
    SystemChannels.textInput.setMethodCallHandler((MethodCall call) {
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      throw FlutterError('A fake error occurred during action processing.');
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    });

    try {
      await tester.testTextInput.receiveAction(TextInputAction.done);
      fail('Expected a PlatformException, but it was not thrown.');
    } catch (e) {
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      expect(e, isA<PlatformException>());
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    }
  });
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}