Improved application

src/cpl/application/application_abc.py

@@ -4,6 +4,7 @@ from typing import Type, Optional
 from cpl.application.application_host_abc import ApplicationHostABC
 from cpl.application.startup_abc import StartupABC
 from cpl.configuration.configuration_abc import ConfigurationABC
+from cpl.console.console import Console
 from cpl.dependency_injection.service_provider_base import ServiceProviderABC
 
 
@@ -26,6 +27,18 @@ class ApplicationABC(ABC):
             self._services = self._startup.create_services()
 
     def run(self):
+        if self._app_host is None:
+            Console.error('Application host is empty')
+            exit()
+
+        if self._configuration is None:
+            Console.error('Configuration is empty')
+            exit()
+
+        if self._services is None:
+            Console.error('Service provider is empty')
+            exit()
+
         self.configure()
         self.main()
 

src/tests/main.py

@@ -1,4 +1,4 @@
-from tests.Application import Application
+from tests.application import Application
 from tests.startup import Startup
 
 if __name__ == '__main__':