override fun createDispatcher()

in kotlinx-coroutines-test/jvm/src/internal/TestMainDispatcherJvm.kt [8:28]

• 18 lines of code
• 3 McCabe index (conditional complexity)

    override fun createDispatcher(allFactories: List<MainDispatcherFactory>): MainCoroutineDispatcher {
        val otherFactories = allFactories.filter { it !== this }
        val secondBestFactory = otherFactories.maxByOrNull { it.loadPriority } ?: MissingMainCoroutineDispatcherFactory
        /* Do not immediately create the alternative dispatcher, as with `SUPPORT_MISSING` set to `false`,
        it will throw an exception. Instead, create it lazily. */
        return TestMainDispatcher({
            val dispatcher = try {
                secondBestFactory.tryCreateDispatcher(otherFactories)
            } catch (e: Throwable) {
                reportMissingMainCoroutineDispatcher(e)
            }
            if (dispatcher.isMissing()) {
                reportMissingMainCoroutineDispatcher(runCatching {
                    // attempt to dispatch something to the missing dispatcher to trigger the exception.
                    dispatcher.dispatch(dispatcher, Runnable { })
                }.exceptionOrNull()) // can not be null, but it does not matter.
            } else {
                dispatcher
            }
        })
    }