Deny chassis with too long description

Catching error at earlier stage when creating chassis with too long
description that does not fit to the database table field.

Change-Id: Iccd002f959d262765eb50bf4391981bdbfeec907
Closes-Bug: #1588347

ironic/api/controllers/v1/chassis.py

@@ -50,7 +50,7 @@ class Chassis(base.APIBase):
     uuid = types.uuid
     """The UUID of the chassis"""
 
-    description = wtypes.text
+    description = wtypes.StringType(max_length=255)
     """The description of the chassis"""
 
     extra = {wtypes.text: types.jsontype}

ironic/tests/unit/api/v1/test_chassis.py

@@ -43,6 +43,11 @@ class TestChassisObject(base.TestCase):
         chassis = api_chassis.Chassis(**chassis_dict)
         self.assertEqual(wtypes.Unset, chassis.description)
 
+    def test_chassis_sample(self):
+        expected_description = 'Sample chassis'
+        sample = api_chassis.Chassis.sample(expand=False)
+        self.assertEqual(expected_description, sample.as_dict()['description'])
+
 
 class TestListChassis(test_api_base.BaseApiTest):
 
@@ -445,6 +450,25 @@ class TestPost(test_api_base.BaseApiTest):
         result = self.get_json('/chassis/%s' % cdict['uuid'])
         self.assertEqual(descr, result['description'])
 
+    def test_create_chassis_toolong_description(self):
+        descr = 'a' * 256
+        valid_error_message = ('Value should have a maximum character '
+                               'requirement of 255')
+        cdict = apiutils.chassis_post_data(description=descr)
+        response = self.post_json('/chassis', cdict, expect_errors=True)
+        self.assertEqual(http_client.BAD_REQUEST, response.status_int)
+        self.assertEqual('application/json', response.content_type)
+        self.assertIn(valid_error_message, response.json['error_message'])
+
+    def test_create_chassis_invalid_description(self):
+        descr = 1334
+        valid_error_message = 'Value should be string'
+        cdict = apiutils.chassis_post_data(description=descr)
+        response = self.post_json('/chassis', cdict, expect_errors=True)
+        self.assertEqual(http_client.BAD_REQUEST, response.status_int)
+        self.assertEqual('application/json', response.content_type)
+        self.assertIn(valid_error_message, response.json['error_message'])
+
 
 class TestDelete(test_api_base.BaseApiTest):
 

releasenotes/notes/deny-too-long-chassis-description-0690d6f67ed002d5.yaml

@@ -0,0 +1,4 @@
+fixes:
+  - Deny too long description of chassis
+    (more than 255 chars) with appropriate
+    correct message.