message: test: Check if specified config file cannot be opened
diff: @@ -248,6 +248,10 @@ class ConfArgsTest(BitcoinTestFramework):
  self.nodes[0].assert_start_raises_init_error([f'-conf={conf_file}'], f'Error: Error reading configuration file: specified data directory "{new_data_dir}" does not exist.')
  + # Check that an explicitly specified config file that cannot be opened fails
  + none_existent_conf_file = os.path.join(default_data_dir, "none_existent_bitcoin.conf")
  + self.nodes[0].assert_start_raises_init_error(['-conf=' + none_existent_conf_file], 'Error: Error reading configuration file: specified config file "' + none_existent_conf_file + '" could not be opened.')
  +
  # Create the directory and ensure the config file now works
  os.mkdir(new_data_dir)
  self.start_node(0, [f'-conf={conf_file}'])
  