def test_not_null_validator():
func = StringParser(quoted=0).not_null().build()
assert func("SOME_VALUE") == "SOME_VALUE"
with pytest.raises(NullValueInNotNullFieldException):
assert func(None)
assert func("") == ""
p = StringParser().not_null(allow_white_space=True)
func = p.build()
assert func("") == ""
# Default value assignment check
func = StringParser(quoted=0).not_null(default_value="NA").build()
assert func(None) == "NA"
assert func("") == "NA"
# Import required parser class
import logging
from parseval.parser import StringParser
logging.basicConfig(format='%(levelname)s:%(asctime)s:: %(message)s',
level=logging.DEBUG)
basic_parser = StringParser() # Create basic parser object
basic_parse_func = basic_parser.build() # Build the parser function
input_data = 'Any String' # Input Data
basic_parsed_output = basic_parse_func(input_data) # Parse data
logging.info(('#' * 50) + " STRING PARSING " + ('#' * 50))
logging.info("====> Simple Data Parsing example:")
logging.info("Input 1: {}".format(input_data))
logging.info("Output 1: {}".format(basic_parsed_output))
logging.info('\n')
# Now let's see some available validators, to get the idea of how to use those
# Note, we will not go through all available validators, because all validators work in same fashion
# Syntax and description of all validators are available in documentation
validation_parser = StringParser()\
.not_null(default_value="NA")\
.value_set(["Apple", "Google", "NA"]) # null check validation and allowed values validation is added
validation_parse_func = validation_parser(
) # Yes, you can directly call the object to build the parser
valid_input_data = 'Apple'
output_for_valid_input_data = validation_parse_func(
valid_input_data) # Parse data
logging.info("====> Data Validation example:")
def _first_three_char_check(data: str):
list_of_allowed_value: list = ['ABC', 'DEF']
if not data:
return data
if str(data)[:3].upper() in [
word.upper() for word in list_of_allowed_value
]:
return data
else:
raise Exception("Bad prefix in the value.")
# Create and build the parser
parser = StringParser().add_func(_first_three_char_check)
parser_func = parser.build()
input_data = "ABC2344"
logging.info(('#' * 50) + " ADDING CUSTOM VALIDATOR " + ('#' * 50))
logging.info("====> Valid Input:")
logging.info("Input: {}".format(input_data))
logging.info("Output: {}".format(parser_func(input_data)))
logging.info('\n')
input_data = "PQR12344"
logging.info("====> Invalid Input:")
try:
logging.info("Invalid Input: {}".format(input_data))
parser_func(input_data)
except Exception as e:
logging.error("Raised Exception: {}".format(str(e)))