old_contents: import os
  import pytest
  import paramiko
  from paramiko.ssh_exception import AuthenticationException, SSHException, BadHostKeyException
  import re
  
  class TestIATIBackupServer:
  
      @classmethod
      def setup_class(self):
          """
          Create a SSH client for use by test methods.
          Login credentials are stored as environment variables.
          """
          hostname = os.environ["backup_server_hostname"]
          username = os.environ["backup_server_username"]
          password = os.environ["backup_server_password"]
  
          try:
              self.client = paramiko.SSHClient()
              self.client.load_system_host_keys()
              self.client.connect(hostname, username=username, password=password, timeout=5)
          except AuthenticationException:
              print("Authentication failed, please verify your credentials: %s")
          except SSHException as sshException:
              print("Unable to establish SSH connection: %s" % sshException)
          except BadHostKeyException as badHostKeyException:
              print("Unable to verify server's host key: %s" % badHostKeyException)
          except Exception as e:
              print("Operation error: %s" % e)
  
      def test_ping(self):
          """
          Test that the server can be pinged. This indicates that it is
          at least online
          """
          server_address = "83.170.85.222"
  
          result = os.system("ping -c 1 {}".format(server_address))
  
          assert result == 0  # 0 indicates the network is active
  
      def test_at_least_1GB_disk_space_available(self):
          """
          Test that there is sufficient space available for future backups.
          Filters the output of 'df' to return the KBs available to the server's main disk.
          """
  
          stdin, stdout, stderr = self.client.exec_command("df /dev/xvda1 | awk '{print $4}' | sed -n 2p | xargs echo -n")
  
          disk_space_available = int(stdout.read())
  
          assert disk_space_available > 1000000  # 1000000KB ~ 1GB
  
new_contents: import os
  import pytest
  import paramiko
  from paramiko.ssh_exception import AuthenticationException, SSHException, BadHostKeyException
  import re
  
  class TestIATIBackupServer:
  
      @classmethod
      def setup_class(self):
          """
          Create a SSH client for use by test methods.
          Login credentials are stored as environment variables.
          """
          hostname = os.environ["backup_server_hostname"]
          username = os.environ["backup_server_username"]
          password = os.environ["backup_server_password"]
  
          try:
              self.client = paramiko.SSHClient()
              self.client.load_system_host_keys()
              self.client.connect(hostname, username=username, password=password, timeout=5)
          except AuthenticationException:
              print("Authentication failed, please verify your credentials: %s")
          except SSHException as sshException:
              print("Unable to establish SSH connection: %s" % sshException)
          except BadHostKeyException as badHostKeyException:
              print("Unable to verify server's host key: %s" % badHostKeyException)
          except Exception as e:
              print("Operation error: %s" % e)
  
      def test_ping(self):
          """
          Test that the server can be pinged. This indicates that it is
          at least online
          """
          server_address = "83.170.85.222"
  
          result = os.system("ping -c 1 {}".format(server_address))
  
          assert result == 0  # 0 indicates the network is active
  
      def test_csv2iati_backup_made_daily(self):
          """
          Tests that a csv2iati backups has been made within the past 24 hours, and
          that this file has:
          - a filesize greater than 0 bytes
          - a filename matching a regex pattern (which defines the expected filename)
          """
          stdin, stdout, stderr = self.client.exec_command(
              "find /home/backups/csv2iati -type f -mtime -1 -print0 | xargs -0 du | xargs echo -n"
              )
          stdout_unicode = stdout.read().decode('utf-8')
          filesize_str, filename = stdout_unicode.split(" ")
  
          filesize = int(filesize_str)
          result = re.search(r"\d{4}-\d{2}-\d{2}.sqlite", filename)  # Returns True is the regex pattern is found in the filename
  
          assert filesize > 0
          assert result
  
      def test_at_least_1GB_disk_space_available(self):
          """
          Test that there is sufficient space available for future backups.
          Filters the output of 'df' to return the KBs available to the server's main disk.
          """
  
          stdin, stdout, stderr = self.client.exec_command("df /dev/xvda1 | awk '{print $4}' | sed -n 2p | xargs echo -n")
  
          disk_space_available = int(stdout.read())
  
          assert disk_space_available > 1000000  # 1000000KB ~ 1GB
  
subject: Add test for csv2iati backups Test checks that a backup file has been made within the past 24 hours, is not empty and that the filename matches a regex pattern