People really use fixture to simulate internal code? i thought it was overwhelmingly used to simulate external API response, or weird libraries that need some c

People really use fixture to simulate internal code? i thought it was overwhelmingly used to simulate external API response, or weird libraries that need some context switching (and in that case, an advice: the NIH syndrome is _very_ valid, and sometime the library you use isn't worth the time you put "fixing" it: just rewrite the damn thing) [edit] though in my case we have one fixture that load a json representation of our dev dynamodb into moto, and thus we mock internal data, but this data is still read through our data models, it doesn't really replace internal code, only internal "mechanics"