Fix virt.get_hypervisor()

virt.get_hypervisor resulted in:

  AttributeError: module 'salt.loader.dev-srv.tf.local.int.module.virt' has no attribute '_is_{}_hyper'

This was due to missplaced parenthese.

salt/modules/virt.py

@@ -3309,7 +3309,7 @@ def get_hypervisor():
     # To add a new 'foo' hypervisor, add the _is_foo_hyper function,
     # add 'foo' to the list below and add it to the docstring with a .. versionadded::
     hypervisors = ['kvm', 'xen']
-    result = [hyper for hyper in hypervisors if getattr(sys.modules[__name__], '_is_{}_hyper').format(hyper)()]
+    result = [hyper for hyper in hypervisors if getattr(sys.modules[__name__], '_is_{}_hyper'.format(hyper))()]
     return result[0] if result else None
 
 

tests/unit/modules/test_virt.py

@@ -2663,3 +2663,17 @@ def test_pool_list_volumes(self):
         self.mock_conn.storagePoolLookupByName.return_value = mock_pool
         # pylint: enable=no-member
         self.assertEqual(names, virt.pool_list_volumes('default'))
+
+    @patch('salt.modules.virt._is_kvm_hyper', return_value=True)
+    @patch('salt.modules.virt._is_xen_hyper', return_value=False)
+    def test_get_hypervisor(self, isxen_mock, iskvm_mock):
+        '''
+        test the virt.get_hypervisor() function
+        '''
+        self.assertEqual('kvm', virt.get_hypervisor())
+
+        iskvm_mock.return_value = False
+        self.assertIsNone(virt.get_hypervisor())
+
+        isxen_mock.return_value = True
+        self.assertEqual('xen', virt.get_hypervisor())