Option to always pull image when creating a container

[BenasB]

Is your feature request related to a problem? Please describe.
I have a case where my tests should always retrieve the latest image. AFAIK, this library now pulls an image only if it's missing (sort of like docker run --pull "missing" ..., which is the default) but I would like to always pull the image (so it gets the most up to date version of it) before starting the container (like docker run --pull "always" ... does).

Describe the solution you'd like
An option that enables this behavior would be perfect, for example a .WithImagePull(PullType) builder method where PullType could be Missing (default behavior) or Always. Although I am not sure how this could be implemented.

Describe alternatives you've considered
The image pull can be done explicitly before building/starting the container by using Docker.DotNet directly and this would be okay, but testcontainers-dotnet already has support for credential helpers (AFAIK Docker.DotNet does not support that) which I'm trying to take advantage of (since I'm authenticating to a private registry)

How much would this be feasible? Thanks!

[HofmeisterAn]

An equivalent to the Java withImagePullPolicy would be great.

[BenasB]

That's exactly what I've imagined, although I don't have experience with the Java version. I will try to take a look at how it's implemented there and see how I could implement a similar feature for testcontainers-dotnet

[kiview]

@BenasB Let us know if you have any questions regarding the Java implementation 🙂