network_image_mock 1.0.1

  • Readme
  • Changelog
  • Example
  • Installing
  • 80

Network Image Mock #

Pub Version Lint & Test

A utility for providing mocked response to in Flutter widget tests.

Introduction #

Since you are here you probably already know that calling results in 400 response in Flutter widget tests. The reason for this is that default HTTP client in tests always return a 400.

So, what can we do about it? Instead of copying the whole code over and over again for mocking the HTTP client, I created this package. It is heavily inspired by roughike/image_test_utils, however that package is not being maintained despite multiple pull requests asking for bumping the mockito version and making the package usable again.

Installing #

This package should be installed under dev_dependencies like

  network_image_mock: ^1.0.0

Example #

The package is quite straightforward to use. All you have to do is include it in your test file and wrap widget testing functions that require proper response in mockNetworkImagesFor() function provided by this package. A full test example could look like this.

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

Widget makeTestableWidget() => MaterialApp(home:''));

void main() {
    'should properly mock and not crash',
    (WidgetTester tester) async {
      mockNetworkImagesFor(() => tester.pumpWidget(makeTestableWidget()));

This is actually an example taken from tests for this package.

Contributing #

There is not much to contribute since the package serves its purpose, however, in chance of needing to bump or adjust some version, or any other suggestion for that matter, please read CONTRIBUTING.

Changelog #

1.0.1 #

Add example.

1.0.0 #

Official release.


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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  Widget build(BuildContext context) {
    return MaterialApp(

void main() {
    'should properly mock and not crash',
    (WidgetTester tester) async {
      mockNetworkImagesFor(() => tester.pumpWidget(MyApp()));

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  network_image_mock: ^1.0.1

2. Install it

You can install packages from the command line:

with Flutter:

$ flutter pub get

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:network_image_mock/network_image_mock.dart';
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Learn more about scoring.

We analyzed this package on Jul 11, 2020, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.8.4
  • pana: 0.13.14
  • Flutter: 1.17.5

Analysis suggestions

Package not compatible with SDK dart


  • network_image_mock that is a package requiring null.

Package not compatible with runtime flutter-web on web


  • package:network_image_mock/network_image_mock.dart that imports:
  • package:network_image_mock/src/network_image_mock.dart that imports:
  • dart:io


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.1.0 <3.0.0
flutter 0.0.0
mockito ^4.1.1 4.1.1
Transitive dependencies
async 2.4.2
boolean_selector 2.0.0
charcode 1.1.3
collection 1.14.12 1.14.13
matcher 0.12.8
meta 1.1.8 1.2.2
path 1.7.0
sky_engine 0.0.99
source_span 1.7.0
stack_trace 1.9.5
stream_channel 2.0.0
string_scanner 1.0.5
term_glyph 1.1.0
test_api 0.2.17
typed_data 1.1.6 1.2.0
vector_math 2.0.8 2.1.0-nullsafety
Dev dependencies