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Is there recommended approach/setup for testing offline/caching behaviour locally?

Something like UI tests including offline mode?

Can you even turn Airplane mode on from espresso tests? I read about that some time ago and it was not trivial

could we do something for example with `TestNetworkTransport`

we'd want query to succeed initially so data in cache.....and then somehow "disable" network and verify we're getting data from cache then

I would do a OkHttp interceptor that is instrumentable and that can throw when "asked"

Another option would be to use the new <https://www.apollographql.com/docs/kotlin/advanced/network-connectivity/|NetworkMonitor> and `failFastIfOffline` (but that's probably a bit more intrusive if you're not using it already)

Would that exercise same path/logic (<https://github.com/apollographql/apollo-kotlin/blob/main/libraries/apollo-normalized-cache/src/commonMain/kotlin/com/apollographql/apollo/cache/normalized/FetchPolicyInterceptors.kt#L117|FetchPolicyInterceptors.kt:117>) that <@U2F3C51T8> mentioned in <https://kotlinlang.slack.com/archives/C01A6KM1SBZ/p1723132216373929> ?

was just in case maybe with that config it wouldn't actually make network reqeust

The reasonning is that your OkHttp interceptor can trigger a "no route to host" exception just like OkHttp would normally do

So as far as ApolloClient is concerned, the production code and test code is the same