Add awaitShutdown utils

Author: debuglevel

README.md

@@ -22,6 +22,9 @@ Own configuration keys can be access like `MicroserviceConfiguration.configurati
 ### Set port to configured number
 Calling `configuredPort()` sets the port of the web server to the configured port number (`port` or `server.port` as of version 0.0.12).
 
+### Wait until Spark is shut down
+Calling `awaitShutdown()` waits until Spark is shut down. This is especially useful in tests.
+
 ## Status endpoint
 Calling `status()` activates a status/health/diagnostics JSON object on `<HOST>/status/`.
 The JSON object looks like this as of version 0.0.12:

src/main/kotlin/de/debuglevel/microservices/utils/spark/SparkTestUtils.kt

@@ -29,7 +29,6 @@ object SparkTestUtils {
      * Access the internals of Spark to check if the "initialized" flag is already set to false.
      */
     private fun isSparkInitialized(): Boolean {
-
         val sparkClass = Spark::class.java
         val getInstanceMethod = sparkClass.getDeclaredMethod("getInstance")
         getInstanceMethod.isAccessible = true