stages/ovf: test vbox_mac_address

Test that different calls result in different mac addresses (with the
same prefix), also test that when the correct options are passed that
the mac address is returned as is.

Signed-off-by: Simon de Vlieger <supakeen@redhat.com>

stages/test/test_ovf.py

@@ -65,3 +65,18 @@ def test_ovf_default_template(tmp_path, stage_module, test_opts, expected_substr
 
     for substring in expected_substrings:
         assert substring in expected_template_path.read_text()
+
+
+def test_ovf_vbox_mac_address_differs(stage_module):
+    macs = [
+        stage_module.vbox_mac_address({}),
+        stage_module.vbox_mac_address({}),
+    ]
+
+    assert macs[0] != macs[1]
+    assert all(m.startswith("080027") for m in macs)
+    assert all(len(m) == 12 for m in macs)
+
+
+def test_ovf_vbox_mac_address_options(stage_module):
+    assert stage_module.vbox_mac_address({"virtualbox": {"mac_address": "000000000000"}}) == "000000000000"