#2064: Edited services and applications to handle when they are shut down

tests/integration_tests/system/test_ftp_client_server.py

@@ -60,3 +60,40 @@ def test_ftp_client_retrieve_file_from_server(uc2_network):
 
     # client should have retrieved the file
     assert ftp_client.file_system.get_file(folder_name="downloads", file_name="test_file.txt")
+
+
+def test_ftp_client_tries_to_connect_to_offline_server(uc2_network):
+    """Test checks to make sure that the client can't do anything when the server is offline."""
+    client_1: Computer = uc2_network.get_node_by_hostname("client_1")
+    backup_server: Server = uc2_network.get_node_by_hostname("backup_server")
+
+    ftp_client: FTPClient = client_1.software_manager.software["FTPClient"]
+    ftp_server: FTPServer = backup_server.software_manager.software["FTPServer"]
+
+    assert ftp_client.operating_state == ServiceOperatingState.RUNNING
+    assert ftp_server.operating_state == ServiceOperatingState.RUNNING
+
+    # create file on ftp server
+    ftp_server.file_system.create_file(file_name="test_file.txt", folder_name="file_share")
+
+    backup_server.power_off()
+
+    for i in range(backup_server.shut_down_duration + 1):
+        uc2_network.apply_timestep(timestep=i)
+
+    assert ftp_client.operating_state == ServiceOperatingState.RUNNING
+    assert ftp_server.operating_state == ServiceOperatingState.STOPPED
+
+    assert (
+        ftp_client.request_file(
+            src_folder_name="file_share",
+            src_file_name="test_file.txt",
+            dest_folder_name="downloads",
+            dest_file_name="test_file.txt",
+            dest_ip_address=backup_server.nics.get(next(iter(backup_server.nics))).ip_address,
+        )
+        is False
+    )
+
+    # client should have retrieved the file
+    assert ftp_client.file_system.get_file(folder_name="downloads", file_name="test_file.txt") is None