Virt-Viewer launcher: mockmodel changes

This patch adds mockmodel.py and tests/test_rest.py changes
for the virtviewerfile API.

Due to how the control is implemented (internal_redirect),
the solution adopted was to create a temporary file to
represent the Virt Viewer script contents in mockmodel.py,
while in test_rest.py an assert is made to see if the
content was retrieved by the API.

This temporary file is erased in a cleanup method that is
subscribed in the cherrypy 'exit' engine, leaving no
trace in the host.

Signed-off-by: Daniel Henrique Barboza <danielhb@linux.vnet.ibm.com>

mockmodel.py

@@ -17,9 +17,11 @@
 # License along with this library; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
 
+import cherrypy
 import libvirt
 import lxml.etree as ET
 import os
+import tempfile
 import time
 
 from collections import defaultdict
@@ -107,6 +109,7 @@ def __init__(self, objstore_loc=None):
         # and BaseModel
         # Because that a normal method override will not work here
         # Instead of that we also need to do the override on runtime
+
         for method in dir(self):
             if method.startswith('_mock_'):
                 mock_method = getattr(self, method)
@@ -134,6 +137,21 @@ def __init__(self, objstore_loc=None):
         VMHostDevsModel._get_pci_device_xml = self._get_pci_device_xml
         VMHostDevsModel._validate_pci_passthrough_env = self._validate_pci
 
+        self._create_virt_viewer_tmp_file()
+        cherrypy.engine.subscribe('exit', self.virtviewertmpfile_cleanup)
+
+    def _create_virt_viewer_tmp_file(self):
+        self.virtviewerfile_tmp = tempfile.NamedTemporaryFile(
+            dir='../data/virtviewerfiles/',
+            delete=False
+        )
+        file_content = "[virt-viewer]\ntype=vnc\nhost=127.0.0.1\nport=5999\n"
+        self.virtviewerfile_tmp.write(file_content)
+        self.virtviewerfile_tmp.close()
+
+    def virtviewertmpfile_cleanup(self):
+        os.unlink(self.virtviewerfile_tmp.name)
+
     def reset(self):
         MockModel._mock_vms = defaultdict(list)
         MockModel._mock_snapshots = {}
@@ -386,6 +404,11 @@ def _mock_vm_clone(self, name):
         MockModel._mock_snapshots[new_name] = snapshots
         return self._model_vm_clone(name)
 
+    def _mock_vmvirtviewerfile_lookup(self, vm_name):
+        file_name = 'plugins/kimchi/data/virtviewerfiles/%s' %\
+            os.path.basename(self.virtviewerfile_tmp.name)
+        return file_name
+
     def _mock_vmsnapshots_create(self, vm_name, params):
         name = params.get('name', unicode(int(time.time())))
         params = {'vm_name': vm_name, 'name': name}

tests/test_rest.py

@@ -348,6 +348,18 @@ def test_vm_lifecycle(self):
         self.assertEquals(200, resp.status)
         self.assertTrue(resp.getheader('Content-type').startswith('image'))
 
+        # Test Virt Viewer file
+        resp = self.request(
+            '/plugins/kimchi/vms/test-vm/virtviewerfile',
+            '{}',
+            'GET')
+        self.assertEquals(200, resp.status)
+        vvfilecontent = resp.read()
+        self.assertEqual(
+            vvfilecontent,
+            "[virt-viewer]\ntype=vnc\nhost=127.0.0.1\nport=5999\n"
+        )
+
         # Clone a running VM
         resp = self.request('/plugins/kimchi/vms/test-vm/clone', '{}', 'POST')
         self.assertEquals(400, resp.status)