fun enter()

in kotlinx-coroutines-test/common/src/TestScope.kt [218:243]

• 21 lines of code
• 5 McCabe index (conditional complexity)

    fun enter() {
        val exceptions = synchronized(lock) {
            if (entered)
                throw IllegalStateException("Only a single call to `runTest` can be performed during one test.")
            entered = true
            check(!finished)
            /** the order is important: [reportException] is only guaranteed not to throw if [entered] is `true` but
             * [finished] is `false`.
             * However, we also want [uncaughtExceptions] to be queried after the callback is registered,
             * because the exception collector will be able to report the exceptions that arrived before this test but
             * after the previous one, and learning about such exceptions as soon is possible is nice. */
            @Suppress("INVISIBLE_REFERENCE", "INVISIBLE_MEMBER") // do not remove the INVISIBLE_REFERENCE suppression: required in K2
            run { ensurePlatformExceptionHandlerLoaded(ExceptionCollector) }
            if (catchNonTestRelatedExceptions) {
                ExceptionCollector.addOnExceptionCallback(lock, this::reportException)
            }
            uncaughtExceptions
        }
        if (exceptions.isNotEmpty()) {
            ExceptionCollector.removeOnExceptionCallback(lock)
            throw UncaughtExceptionsBeforeTest().apply {
                for (e in exceptions)
                    addSuppressed(e)
            }
        }
    }