I wanted to contribute to [KotlinTest IntelliJ plugin](https://github.com/kotlintest/kotlintest-intellij-plugin) and fix a bug with context configuration not being properly provided (https://github.com/kotlintest/kotlintest-intellij-plugin/issues/20). I wanted to first write unit tests for this case, but I can't seem to have run configuration producers loaded in tests.
`idea.xml` file has couple of producer entries, like `<runConfigurationProducer implementation="io.kotlintest.plugin.intellij.BehaviorSpecRunConfigurationProducer"/>`. I'm using `LightCodeInsightFixtureTestCase` as the base class for tests, and I'd expect that producers are properly loaded. However, even printing out `RunConfigurationProducer.EP_NAME.extensionList` in a test only yields producers provided by IntelliJ or Kotlin, and not the ones defined in `idea.xml`
Is there something I'm missing about what to expect? I wanted to continue by checking `ConfigurationContext(innerMethodPsi).configurationsFromContext` but of course it returns `null` right now.