- invalid test cases

- redfin and realtor bug fixes
- dupe check bug fix

tests/test_realtor.py

@@ -1,4 +1,5 @@
 from homeharvest import scrape_property
+from homeharvest.exceptions import InvalidSite, InvalidListingType, NoResultsFound, GeoCoordsNotFound
 
 
 def test_realtor():
@@ -18,3 +19,17 @@ def test_realtor():
     ]
 
     assert all([result is not None for result in results])
+
+    bad_results = []
+    try:
+        bad_results += [
+            scrape_property(
+                location="abceefg ju098ot498hh9",
+                site_name="realtor.com",
+                listing_type="for_sale",
+            )
+        ]
+    except (InvalidSite, InvalidListingType, NoResultsFound, GeoCoordsNotFound):
+        assert True
+
+    assert all([result is None for result in bad_results])