Fix doc strings

zaza/openstack/charm_tests/ceph/iscsi/tests.py

@@ -32,7 +32,13 @@ class CephISCSIGatewayTest(test_utils.BaseCharmTest):
     EC_METADATA_POOL = 'zaza_ec_metadata_pool'
 
     def get_client_initiatorname(self, unit):
-        """Return the initiatorname for the given unit."""
+        """Return the initiatorname for the given unit.
+
+        :param unit_name: Name of unit to match
+        :type unit: str
+        :returns: Initiator name
+        :rtype: str
+        """
         generic_utils.assertRemoteRunOK(zaza.model.run_on_unit(
             unit,
             ('cp /etc/iscsi/initiatorname.iscsi /tmp; '
@@ -52,7 +58,11 @@ class CephISCSIGatewayTest(test_utils.BaseCharmTest):
         return initiatorname
 
     def get_base_ctxt(self):
-        """Generate a context for running gwcli commands to create a target."""
+        """Generate a context for running gwcli commands to create a target.
+
+        :returns: Base gateway context
+        :rtype: Dict
+        """
         gw_units = zaza.model.get_units('ceph-iscsi')
         primary_gw = gw_units[0]
         secondary_gw = gw_units[1]
@@ -79,8 +89,16 @@ class CephISCSIGatewayTest(test_utils.BaseCharmTest):
     def run_commands(self, unit_name, commands, ctxt):
         """Run commands on unit.
 
-        Apply context to commands until all variables have been replaced, then
-        run the command on the given unit.
+        Iterate over each command and apply the context to the command, then
+        run the command on the suppliend unit.
+
+        :param unit_name: Name of unit to match
+        :type unit: str
+        :param commands: List of commands to run.
+        :type commands: List[str]
+        :param ctxt: Context to apply to each command.
+        :type ctxt: Dict
+        :raises: AssertionError
         """
         for _cmd in commands:
             cmd = _cmd.format(**ctxt)
@@ -89,7 +107,11 @@ class CephISCSIGatewayTest(test_utils.BaseCharmTest):
                 cmd))
 
     def create_iscsi_target(self, ctxt):
-        """Create target on gateway."""
+        """Create target on gateway.
+
+        :param ctxt: Base gateway context
+        :type ctxt: Dict
+        """
         generic_utils.assertActionRanOK(zaza.model.run_action_on_leader(
             'ceph-iscsi',
             'create-target',
@@ -108,7 +130,11 @@ class CephISCSIGatewayTest(test_utils.BaseCharmTest):
             }))
 
     def login_iscsi_target(self, ctxt):
-        """Mount iscsi target on client."""
+        """Login to the iscsi target on client.
+
+        :param ctxt: Base gateway context
+        :type ctxt: Dict
+        """
         logging.info("Logging in to iscsi target")
         base_op_cmd = ('iscsiadm --mode node --targetname {gw_iqn} '
                        '--op=update ').format(**ctxt)
@@ -121,14 +147,25 @@ class CephISCSIGatewayTest(test_utils.BaseCharmTest):
         self.run_commands(ctxt['client_entity_id'], setup_cmds, ctxt)
 
     def logout_iscsi_targets(self, ctxt):
-        """Logout of iscsi target on client."""
+        """Logout of iscsi target on client.
+
+        :param ctxt: Base gateway context
+        :type ctxt: Dict
+        """
         logging.info("Logging out of iscsi target")
         logout_cmds = [
             'iscsiadm --mode node --logoutall=all']
         self.run_commands(ctxt['client_entity_id'], logout_cmds, ctxt)
 
     def check_client_device(self, ctxt, init_client=True):
-        """Wait for multipath device to appear on client and test access."""
+        """Wait for multipath device to appear on client and test access.
+
+        :param ctxt: Base gateway context
+        :type ctxt: Dict
+        :param init_client: Initialise client if this is the first time it has
+                            been used.
+        :type init_client: bool
+        """
         logging.info("Checking multipath device is present.")
         device_ctxt = {
             'bdevice': '/dev/dm-0',
@@ -203,19 +240,22 @@ class CephISCSIGatewayTest(test_utils.BaseCharmTest):
             action_params={
                 'name': self.EC_METADATA_POOL}))
 
-    def run_client_checks(self, ctxt):
+    def run_client_checks(self, test_ctxt):
         """Check access to mulipath device.
 
         Write a filesystem to device, mount it and write data. Then unmount
         and logout the iscsi target, finally reconnect and remount checking
         data is still present.
+
+        :param test_ctxt: Test context.
+        :type test_ctxt: Dict
         """
-        self.create_iscsi_target(ctxt)
-        self.login_iscsi_target(ctxt)
-        self.check_client_device(ctxt, init_client=True)
-        self.logout_iscsi_targets(ctxt)
-        self.login_iscsi_target(ctxt)
-        self.check_client_device(ctxt, init_client=False)
+        self.create_iscsi_target(test_ctxt)
+        self.login_iscsi_target(test_ctxt)
+        self.check_client_device(test_ctxt, init_client=True)
+        self.logout_iscsi_targets(test_ctxt)
+        self.login_iscsi_target(test_ctxt)
+        self.check_client_device(test_ctxt, init_client=False)
 
     def test_create_and_mount_volume(self):
         """Test creating a target and mounting it on a client."""