Cover a case when server replied no json.

slapos/libnetworkcachetests.py

@@ -558,6 +558,33 @@ class OnlineTest(OnlineMixin, unittest.TestCase):
       # empty content in shadir so usual exception is raised
       self.assertEqual(str(msg), 'Could not find a trustable entry.')
 
+  def test_select_no_json_response(self):
+    key = 'somekey' + str(random.random())
+    urlmd5 = str(random.random())
+    file_name = 'my file'
+    test_data = tempfile.TemporaryFile()
+    test_string = str(random.random())
+    test_data.write(test_string)
+    test_data.seek(0)
+    key_file = tempfile.NamedTemporaryFile()
+    key_file.write(self.key)
+    key_file.flush()
+    key_file.seek(0)
+
+    nc = slapos.libnetworkcache.NetworkcacheClient(
+      self.shacache, self.shadir)
+    self.assertEqual(True, nc.upload(self.test_data, key, urlmd5=urlmd5,
+        file_name=file_name))
+    f = os.path.join(self.tree, 'shadir', key)
+    # now remove the entry from shacache
+    open(f, 'w').write('This is not a json.')
+    try:
+      nc.select(key)
+    except slapos.libnetworkcache.DirectoryNotFound, msg:
+      # empty content in shadir so usual exception is raised
+      self.assertTrue(str(msg).startswith('It was impossible to parse json '
+        'response'))
+
   def test_select_signed_content_server_hacked(self):
     key = 'somekey' + str(random.random())
     urlmd5 = str(random.random())