Test no accept headers

Created a test to validate that the api still responds correctly without accept headers being passed.

Change-Id: Ia6e145d857eed7c20b1a048ceaf41e2b301c1ea1
Implements: blueprint no-accept-header-validation

reddwarf/tests/api/header.py

@@ -0,0 +1,42 @@
+from proboscis import test
+from proboscis.asserts import *
+from proboscis import SkipTest
+from functools import wraps
+
+from reddwarfclient.client import ReddwarfHTTPClient
+from reddwarf.tests.api.versions import Versions
+from reddwarfclient import exceptions
+
+
+@test(groups=['dbaas.api.headers'])
+def must_work_with_blank_accept_headers():
+    """Test to make sure that reddwarf works without the headers"""
+    versions = Versions()
+    versions.setUp()
+    client = versions.client
+
+    if type(client.client).morph_request != ReddwarfHTTPClient.morph_request:
+        raise SkipTest("Not using the JSON client so can't execute this test.")
+
+    original_morph_request = client.client.morph_request
+
+    def morph_content_type_to(content_type):
+        @wraps(original_morph_request)
+        def _morph_request(kwargs):
+            original_morph_request(kwargs)
+            kwargs['headers']['Accept'] = content_type
+            kwargs['headers']['Content-Type'] = content_type
+
+        client.client.morph_request = _morph_request
+
+    try:
+        morph_content_type_to('')
+        # run versions to make sure the API still returns JSON even though the
+        # header type is blank
+        versions.test_list_versions_index()
+        # now change headers to XML to make sure the test fails
+        morph_content_type_to('application/xml')
+        assert_raises(exceptions.ResponseFormatError,
+                      versions.test_list_versions_index)
+    finally:
+        client.client.morph_request = original_morph_request

run_tests.py

@@ -2,6 +2,7 @@ import gettext
 import os
 import urllib
 import sys
+import traceback
 
 from reddwarf.common import cfg
 from reddwarf.openstack.common import log as logging
@@ -111,6 +112,7 @@ if __name__ == "__main__":
         # Initialize the test configuration.
         CONFIG.load_from_file('etc/tests/localhost.test.conf')
 
+        from reddwarf.tests.api import header
         from reddwarf.tests.api import limits
         from reddwarf.tests.api import flavors
         from reddwarf.tests.api import versions
@@ -128,7 +130,9 @@ if __name__ == "__main__":
         from reddwarf.tests.api.mgmt import instances
         from reddwarf.tests.api.mgmt import instances_actions
         from reddwarf.tests.api.mgmt import storage
-    except Exception, e:
-        print "Run tests failed %s" % e.msg
+    except Exception as e:
+        print("Run tests failed: %s" % e)
+        traceback.print_exc()
+        raise
 
     proboscis.TestProgram().run_and_exit()