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3 changes: 3 additions & 0 deletions netcompare/check_types.py
Original file line number Diff line number Diff line change
Expand Up @@ -72,6 +72,9 @@ def get_value(output: Union[Mapping, List], path: str = "*", exclude: List = Non

values = jmespath.search(jmespath_value_parser(path), output)

if values is None:
raise TypeError("JMSPath returned 'None'. Please, verify your JMSPath regex.")

# check for multi-nested lists if not found return here
if not any(isinstance(i, list) for i in values):
return values
Expand Down
17 changes: 17 additions & 0 deletions tests/test_get_value.py
Original file line number Diff line number Diff line change
@@ -0,0 +1,17 @@
"""Test GitHub issues."""
import pytest
from netcompare import CheckType


my_data = [{"global": {"peers": {"10.1.0.0": "peer1", "10.2.0.0": "peer2"}}}]


@pytest.mark.parametrize("data", my_data)
def test_jmspath_return_none(data):
"""Handle exception when JMSPath retunr None."""
my_jmspath = "global[*]"
my_check = CheckType.init(check_type="exact_match")
with pytest.raises(TypeError) as error:
my_check.get_value(output=data, path=my_jmspath)() # pylint: disable=E0110

assert "JMSPath returned 'None'. Please, verify your JMSPath regex." in error.value.__str__()