fix: regexp tests

tests/test_option_regexp.py

@@ -0,0 +1,23 @@
+""" RegexpOption
+"""
+from .autopath import do_autopath
+do_autopath()
+
+import pytest
+from tiramisu import RegexpOption, OptionDescription, Config
+import re
+
+
+class ColorOption(RegexpOption):
+    __slots__ = tuple()
+    _type = 'Color'
+    _regexp = re.compile(r"^#(?:[0-9a-f]{3}){1,2}$")
+
+
+def test_regexp_option():
+    r = ColorOption('test', 'test')
+    od = OptionDescription('od', 'od', [r])
+    cfg = Config(od)
+    cfg.option('test').value.set('#ff0000')
+    with pytest.raises(ValueError):
+        cfg.option('test').value.set('not a color')