venv: unit tests don't work for 'hardware_vtep'

If OVN and OVS are not installed on the system, but cloned into '.venv',
the 'OvsVtepVenvFixture' class is not instantiated correctly and all
unit tests fail.

Closes-bug: 2037568

Change-Id: Id26004b57cb02900faed5dabeee8956ff9c66b54

ovsdbapp/tests/functional/schema/hardware_vtep/test_impl_idl.py

@@ -13,6 +13,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+import time
+
 from ovsdbapp.backend.ovs_idl import idlutils
 from ovsdbapp.schema.hardware_vtep.commands import get_global_record
 from ovsdbapp.tests.functional import base
@@ -352,6 +354,16 @@ class TestMacBindingsOps(HardwareVtepTest):
         ]:
             self.addCleanup(self.ovsvenv.call, args)
 
+    def _wait_db_rows(self, table):
+        """Wait for rows in specified table. Raises RuntimeError otherwise."""
+
+        for _ in range(4):
+            if table.rows:
+                return
+            time.sleep(0.5)
+
+        raise RuntimeError("Table '%s' is empty" % table.name)
+
     def test_list_local_macs(self):
         local_macs = self.api.list_local_macs(
             self.ls.name).execute(check_error=True)
@@ -370,6 +382,7 @@ class TestMacBindingsOps(HardwareVtepTest):
         ucast_table = self.api.tables['Ucast_Macs_Local']
         mcast_table = self.api.tables['Mcast_Macs_Local']
         for table in [ucast_table, mcast_table]:
+            self._wait_db_rows(table)
             self.assertEqual(len(table.rows), 1)
 
         self.api.clear_local_macs(self.ls.name).execute(check_error=True)
@@ -380,6 +393,7 @@ class TestMacBindingsOps(HardwareVtepTest):
         ucast_table = self.api.tables['Ucast_Macs_Remote']
         mcast_table = self.api.tables['Mcast_Macs_Remote']
         for table in [ucast_table, mcast_table]:
+            self._wait_db_rows(table)
             self.assertEqual(len(table.rows), 1)
 
         self.api.clear_remote_macs(self.ls.name).execute(check_error=True)

ovsdbapp/venv.py

@@ -282,10 +282,12 @@ class OvsOvnIcVenvFixture(OvsOvnVenvFixture):
 class OvsVtepVenvFixture(OvsOvnVenvFixture):
     VTEP_SCHEMA = 'vtep.ovsschema'
 
-    def __init__(self, venv, vtepdir=None, **kwargs):
+    def __init__(self, venv, **kwargs):
+        vtepdir = os.getenv('VTEP_SRCDIR')
         if vtepdir and os.path.isdir(vtepdir):
             self.PATH_VAR_TEMPLATE += ":{0}".format(vtepdir)
-        self.vtepdir = self._share_path(self.OVS_PATHS, vtepdir)
+        self.vtepdir = self._share_path(self.OVS_PATHS, vtepdir,
+                                        [self.VTEP_SCHEMA])
         super().__init__(venv, **kwargs)
 
     def _setUp(self):

tox.ini

@@ -65,7 +65,7 @@ setenv = {[testenv]setenv}
          OS_TEST_PATH=./ovsdbapp/tests/functional
          OVN_SRCDIR={envdir}/src/ovn
          OVS_SRCDIR={envdir}/src/ovn/ovs
-         VTEP_SRCDIR={envdir}src/ovn/ovs/vtep
+         VTEP_SRCDIR={envdir}/src/ovn/ovs/vtep
          OVN_BRANCH={env:OVN_BRANCH:}
 passenv = KEEP_VENV
 commands =