Disable cache for cmd testcases

Right now, we don't actually need a cache for our current tests, so
for now we'll disable it.  Future cmd tests, will enable this making
sure we have the proper coverage.

Change-Id: If7a25c3281fd57257473054348555aa06b5b6d95
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

grafana_dashboards/cache.py

@@ -24,10 +24,12 @@ class Cache(object):
 
     def __init__(self, cachedir):
         cache_dir = self._get_cache_dir(cachedir)
+        filename = os.path.join(cache_dir, 'cache.dbm')
+        LOG.debug('Using cache: %s' % filename)
         self.region = make_region().configure(
             'dogpile.cache.dbm',
             arguments={
-                'filename': os.path.join(cache_dir, 'cache.dbm')
+                'filename': filename,
             }
         )
 

grafana_dashboards/parser.py

@@ -15,12 +15,15 @@
 import hashlib
 import io
 import json
+import logging
 import yaml
 
 from slugify import slugify
 
 from grafana_dashboards.schema.dashboard import Dashboard
 
+LOG = logging.getLogger(__name__)
+
 
 class YamlParser(object):
 
@@ -31,8 +34,10 @@ class YamlParser(object):
         data = self.data.get('dashboard', {}).get(slug, None)
         md5 = None
         if data:
-            content = json.dumps(data)
+            # Sort json keys to help our md5 hash are constant.
+            content = json.dumps(data, sort_keys=True)
             md5 = hashlib.md5(content.encode('utf-8')).hexdigest()
+        LOG.debug('Dashboard %s: %s' % (slug, md5))
 
         return data, md5
 

tests/cmd/base.py

@@ -12,6 +12,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+import os
 import sys
 
 import fixtures
@@ -22,6 +23,8 @@ from tests.base import TestCase
 
 
 class TestCase(TestCase):
+    configfile = os.path.join(
+        os.path.dirname(__file__), 'fixtures/cmd/grafyaml.conf')
 
     def shell(self, argstr, exitcodes=(0,)):
         orig = sys.stdout
@@ -29,7 +32,10 @@ class TestCase(TestCase):
         try:
             sys.stdout = six.StringIO()
             sys.stderr = six.StringIO()
-            argv = ['grafana-dashboards']
+            argv = [
+                'grafana-dashboards',
+                '--config-file=%s' % self.configfile,
+            ]
             argv += argstr.split()
             self.useFixture(fixtures.MonkeyPatch('sys.argv', argv))
             cmd.main()

tests/fixtures/cmd/grafyaml.conf

@@ -0,0 +1,5 @@
+[grafana]
+url = http://grafana.example.org
+
+[cache]
+enabled = false