feat: Throw if container not running#1550
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HofmeisterAn merged 3 commits intodevelopfrom Oct 15, 2025
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Thanks for taking the time to address this issue, Andre! |
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What does this PR do?
This PR introduces wait strategy modes. Wait strategy modes define how Testcontainers for .NET handles wait strategies. Normally, a wait strategy indicates when a container (and the service inside it) is ready to use. These strategies assume the container stays running.
However, sometimes a container fails to start and exits during startup. In those cases, Testcontainers kept retrying the wait strategy indefinitely, never indicating readiness. From a developer's point of view, it looks like the container startup is just hanging.
This PR updates the internal behavior of wait strategies. They now expect the container to be running. If the container exits unexpectedly, Testcontainers for .NET will collect the exit code and logs, then throw a meaningful exception:
ContainerNotRunningException, which includes that information.Some scenarios do not require the container to stay running. For example, running database migrations in a sidecar container during startup. In those cases, it is fine if the container exits after finishing its work. To support this, Testcontainers for .NET now provides wait strategy modes.
If you do not want an exception when a container exits unexpectedly, set the wait strategy mode to
OneShot.TODOs
Why is it important?
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