Add unit tests for `regions/api.py` module

Signed-off-by: Mihaela Balutoiu <mbalutoiu@cloudbasesolutions.com>

coriolis/tests/regions/test_api.py

@@ -0,0 +1,59 @@
+# Copyright 2024 Cloudbase Solutions Srl
+# All Rights Reserved.
+
+from unittest import mock
+
+from coriolis.regions import api as regions_module
+from coriolis.tests import test_base
+
+
+class APITestCase(test_base.CoriolisBaseTestCase):
+    """Test suite for the Coriolis API class."""
+
+    def setUp(self):
+        super(APITestCase, self).setUp()
+        self.api = regions_module.API()
+        self.rpc_client = mock.MagicMock()
+        self.api._rpc_client = self.rpc_client
+        self.ctxt = mock.sentinel.ctxt
+        self.region_id = mock.sentinel.region_id
+        self.region_name = mock.sentinel.region_name
+
+    def test_create(self):
+        description = mock.sentinel.description
+
+        result = self.api.create(self.ctxt, self.region_name, description,
+                                 enabled=True)
+
+        self.rpc_client.create_region.assert_called_once_with(
+            self.ctxt, self.region_name, description=description,
+            enabled=True)
+        self.assertEqual(result, self.rpc_client.create_region.return_value)
+
+    def test_update(self):
+        updated_values = mock.sentinel.updated_values
+
+        result = self.api.update(self.ctxt, self.region_id, updated_values)
+
+        self.rpc_client.update_region.assert_called_once_with(
+            self.ctxt, self.region_id, updated_values=updated_values)
+        self.assertEqual(result, self.rpc_client.update_region.return_value)
+
+    def test_delete(self):
+        self.api.delete(self.ctxt, self.region_id)
+
+        self.rpc_client.delete_region.assert_called_once_with(
+            self.ctxt, self.region_id)
+
+    def test_get_regions(self):
+        result = self.api.get_regions(self.ctxt)
+
+        self.rpc_client.get_regions.assert_called_once_with(self.ctxt)
+        self.assertEqual(result, self.rpc_client.get_regions.return_value)
+
+    def test_get_region(self):
+        result = self.api.get_region(self.ctxt, self.region_id)
+
+        self.rpc_client.get_region.assert_called_once_with(
+            self.ctxt, self.region_id)
+        self.assertEqual(result, self.rpc_client.get_region.return_value)