def test_is_item(self):
self.assertTrue(DefinitionItem.is_item("term"))
self.assertTrue(DefinitionItem.is_item("term "))
self.assertFalse(DefinitionItem.is_item("term :"))
self.assertFalse(DefinitionItem.is_item("term : "))
self.assertTrue(DefinitionItem.is_item("term : classifier"))
self.assertFalse(DefinitionItem.is_item(":term : classifier"))
self.assertFalse(DefinitionItem.is_item("term : classifier:"))
# special cases
header_with_object = 'component : class.component.instance'
self.assertTrue(DefinitionItem.is_item(header_with_object))
header_with_trait = 'properies : Dict(Str, Any)'
self.assertTrue(DefinitionItem.is_item(header_with_trait))
header_with_or = 'item : ModelIndex or None'
self.assertFalse(DefinitionItem.is_item(header_with_or))
multiple_classifiers = 'item : 1 : w2 : w.w4'
self.assertTrue(DefinitionItem.is_item(multiple_classifiers))
