def test_invalid_field():
"""Test that error is propagated from field parser to json parser.
1. Create json parser.
2. Try to parse a field from invalid data.
3. Check that error is raised.
4. Check that error is the same as one that field parser raises.
"""
invalid_field_data = object()
parser = JSONParser()
with pytest.raises(ValueError) as actual_error_info:
parser.parse_field(invalid_field_data)
with pytest.raises(ValueError) as expected_error_info:
parser.create_field_parser(invalid_field_data).parse()
assert actual_error_info.value.args[0] == expected_error_info.value.args[
0], ("Wrong error is raised")
def test_fields(fields_data):
"""Test that fields are properly parsed.
1. Create an action parser.
2. Replace parse_field of the json parser so that it returns fake data.
3. Parse fields.
4. Check the parsed fields.
"""
json_parser = JSONParser()
json_parser.parse_field = fields_data.index
actual_fields = ActionParser(data={
"fields": fields_data
},
parser=json_parser).parse_fields()
assert actual_fields == tuple(range(len(fields_data))), "Wrong fields"