Skip tests needing AppDataLocation on older Qt versions

pytest.ini

@@ -27,6 +27,7 @@ markers =
     this: Used to mark tests during development
     no_invalid_lines: Don't fail on unparseable lines in end2end tests
     issue2478: Tests which are broken on Windows with QtWebEngine, https://github.com/qutebrowser/qutebrowser/issues/2478
+    qt55: Tests only running on Qt 5.5 or later
 qt_log_level_fail = WARNING
 qt_log_ignore =
     ^SpellCheck: .*

tests/conftest.py

@@ -62,6 +62,7 @@ def _apply_platform_markers(config, item):
         ('no_ci', 'CI' in os.environ, "Skipped on CI."),
         ('issue2478', os.name == 'nt' and config.webengine,
          "Broken with QtWebEngine on Windows"),
+        ('qt55', not qtutils.version_check('5.5'), "Requires Qt 5.5 or newer"),
     ]
 
     for searched_marker, condition, default_reason in markers:

tests/unit/utils/test_standarddir.py

@@ -53,6 +53,9 @@ def test_fake_mac_auto_config(tmpdir, monkeypatch):
     assert standarddir.config(auto=True) == expected
 
 
+# FIXME:conf
+# needs AppDataLocation
+@pytest.mark.qt55
 @pytest.mark.parametrize('what', ['data', 'config'])
 def test_fake_windows_data_config(tmpdir, monkeypatch, what):
     """Make sure the config is correct on a fake Windows."""
@@ -311,6 +314,9 @@ class TestSystemData:
         assert standarddir.data(system=True) == standarddir.data()
 
 
+# FIXME:conf
+# needs AppDataLocation
+@pytest.mark.qt55
 class TestDataMigrations:
 
     """Test moving various data from an old to a new location."""