Add a length check to BDD tooling (#82)

Co-authored-by: Jiri Kuncar <[email protected]>

Author: Matthew Hardwick

tests/conftest.py

@@ -407,6 +407,12 @@ def expect_equal_value(api_request, fixtures, response_path, fixture_path):
     assert fixture_value == response_value
 
 
+@then(parsers.parse('the response "{response_path}" has length {fixture_length:d}'))
+def expect_equal_value(api_request, fixtures, response_path, fixture_length):
+    response_value = glom(api_request["response"][0], response_path)
+    assert fixture_length == len(response_value)
+
+
 @then(parsers.parse('the response "{response_path}" is false'))
 def expect_false(api_request, response_path):
     response_value = glom(api_request["response"][0], response_path)