How to test with `PersistentStateComponent`
I have a configurable like that:
class RainbowSettings : PersistentStateComponent<RainbowSettings> {}
It is possible to mock the `RainbowSettings` at test runtime?
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You can manually register mock component in tests by casting `Application.getPicoContainer` or `Project.getPicoContainer` to `MutablePicoContainer`.
https://github.com/JetBrains/intellij-community/blob/533d8ce5d83deb44e0e0f9494e175456d0161deb/platform/vcs-tests/testSrc/com/intellij/openapi/vcs/roots/VcsIntegrationEnablerTest.java#L41
Or you can use custom plugin.xml in tests and use "overrides" attribute.
https://github.com/JetBrains/intellij-community/blob/533d8ce5d83deb44e0e0f9494e175456d0161deb/plugins/git4idea/tests/META-INF/plugin.xml#L12
But ... I need change the fake PersistentStateComponent frequently to test with different settings, is that possible to do that? As I see, in your example are all use pre-defined class ...
The mock PersistentStateComponent can have setters to update necessary settings.
Probably, your non-mock PersistentStateComponent has setters too. Can't you just set necessary settings before each run (and reset back to defaults in tearDown)?
Thanks a lot !