added more test code

Author: tobixen

tests/test_searcher.py

@@ -13,6 +13,17 @@ def test_add_property_filter_undef():
     assert "SUMMARY" not in s._property_filters
 
 
+def test_add_property_filter_contains():
+    """Adding an "undef" property filter should record the operator but
+    not attempt to coerce the value through TypesFactory (since value is
+    ignored for 'undef')."""
+    s = Searcher()
+    s.add_property_filter("SUMMARY", "rain", operator="contains")
+    assert "SUMMARY" in s._property_operator
+    assert s._property_operator["SUMMARY"] == "contains"
+    assert "SUMMARY" in s._property_filters
+
+
 def test_add_property_filter_unsupported():
     """Unsupported operators should raise NotImplementedError."""
     s = Searcher()