request: Allow Mocking of Image.network

[ABausG]

Is there an existing feature request for this?

• I have searched the existing issues.

Command

I would like to mock Image.network to support that in golden_tests

Description

I want to test widgets that use Image.network in golden tests. Right now if there is a widget trying to use Image.network the following exception is thrown:

When the exception was thrown, this was the stack:
#0      NetworkImage._loadAsync (package:flutter/src/painting/_network_image_io.dart:98:9)
<asynchronous suspension>
<asynchronous suspension>
(elided one frame from package:stack_trace)

Image provider: NetworkImage("", scale: 1.0)
Image key: NetworkImage("", scale: 1.0)

Reasoning

Testing widgets with Network Images should be vital

Additional context and comments

I tried to wrap the goldenTest with await mockNetworkImages(() async { from https://github.com/felangel/mocktail/tree/main/packages/mocktail_image_network but that did not have the desired effect

[Kirpal]

Thanks for bringing this up! When you say "mock", do you mean you'd like to intercept the requests and add your own placeholder images? Or do you mean you'd like to match the implementation of mockNetworkImages, where the request succeeds but shows a 1-pixel transparent image?

[ABausG]

Initially I thought Kirschsteines a system in place that makes the tests not fail would be nice, but thinking about what you said I think being able to provide custom placeholder would be even better.

[samandmoore]

Is this in scope for this library or could it be facilitated by using a network image mocking package in conjunction with alchemist?

[ABausG]

I think it would be better if people can use their preferred image mocking package with alchemist