Use FakeFlavor in TestFlavorUnset.

Change-Id: Ifbd360db39d380efd9632300367b13283ac75f54
Implements: blueprint improve-flavor-unit-test

Author: tang-chen

openstackclient/tests/compute/v2/test_flavor.py

@@ -13,8 +13,6 @@
 #   under the License.
 #
 
-import copy
-
 from openstackclient.compute.v2 import flavor
 from openstackclient.tests.compute.v2 import fakes as compute_fakes
 
@@ -242,14 +240,13 @@ def test_flavor_set(self):
 
 class TestFlavorUnset(TestFlavor):
 
+    # Return value of self.flavors_mock.find().
+    flavor = compute_fakes.FakeFlavor.create_one_flavor()
+
     def setUp(self):
         super(TestFlavorUnset, self).setUp()
 
-        self.flavors_mock.find.return_value = compute_fakes.FakeFlavorResource(
-            None,
-            copy.deepcopy(compute_fakes.FLAVOR),
-            loaded=True,
-        )
+        self.flavors_mock.find.return_value = self.flavor
 
         self.cmd = flavor.UnsetFlavor(self.app, None)