Image Upload resize issues with InputFile

[oatsoda]

When using the bUnit InputFile if the production code is using the Image Resize functionality from the Blazor Components, then it doesn't work because the RequestImageFileAsync method is doing specific type checking that the IBrowserFile is actually a BrowserFile. Which of course, the BUnitBrowserFile is not ;)

I can't see any ways of getting around this with what is already there. I'd prefer not to create a "fake" abstraction just to then inject some test version to circumvent it.

Has anyone had any experience with working around this?

[linkdotnet]

Hey @oatsoda. Good catch. Not sure if we can do much there as this is an internal sealed class.
The only thing I can imagine from your side is to hide it behind an interface / façade which you can mock.

[egil]

Yeah, unfortunately we cannot do much when the Blazor team forgets to make things testable.

What you could do is raise an issue in the aspnetcore repo. They might be open to change this for . net 7, since it would not be a breaking change.

[linkdotnet]

Yeah, unfortunately we cannot do much when the Blazor team forgets to make things testable.

What you could do is raise an issue in the aspnetcore repo. They might be open to change this for . net 7, since it would not be a breaking change.

What is very weird to me is that this is an extension method for IBrowserFile which throws exceptions, when not used with their internal class. How ironic :D

[oatsoda]

Thanks!

It was just on the off-chance that someone might have had a workaround; I couldn't see one.

The leaky abstraction/downcasting is a bit ugly too - not quite sure why it is an extension of the interface if it is only relevant for a specific concrete.

[oatsoda]

Thanks for raising the issue (dotnet/aspnetcore#42690) @linkdotnet ! Much appreciated.

[linkdotnet]

Guess the reason is that in "the wild" you would not see a different implementation so from a Blazor point of view it is a safe cast.
But yeah weird to offer an interface then in the first place.