def test_conversion(interface: AltInterface, input_file: str, source: str,
target: str):
"""
Simple conversion test. Converts input to `target`, checks the output type, converts it back to `source` and compare
it with original input.
.. note::
Bare on mind that this function is also slightly testing comparison. If this test fails, don't forget to check
also comparison function and wrapper!
:param interface: `pytest fixture` returning :class:`~backend.python_interface.AltInterface` instance
:param input_file: path to XML file containing input
:param source: type of input
:param target: type of conversion output
"""
if target == 'fa':
result_type = '</NFA>'
elif target == 'rg':
result_type = '</RightRG>'
elif target == 're':
result_type = '</UnboundedRegExp>'
else:
pytest.fail('Invalid target passed as argument!!')
return
xml_input = read_input(input_file)
res = interface.conversion(xml_input, source, target)
assert res.endswith(result_type + '\n')
res = interface.conversion(res, target, source)
res = interface.comparison(xml_input, source, res, source)
assert res is True
def test_fails(interface: AltInterface):
"""
Testing invalid requests for :class:`~backend.python_interface.AltInterface` that should always fail.
:param interface: `pytest fixture` returning :class:`~backend.python_interface.AltInterface` instance
"""
# Passing file as parameter
with pytest.raises(AltInterfaceException, match='Cannot parse the XML'):
interface.algorithms(REGEXPS + '/regexp.xml',
AlgorithmTypes.REGEXP_TRIM)
# Omitting the optional parameter which is mandatory for some algorithms OR giving optional parameter when it's not
# wanted
xml_input = read_input(REGEXPS + '/regexp.xml')
with pytest.raises(AltInterfaceException,
match='No string to differentiate by was given!'):
interface.algorithms(xml_input, AlgorithmTypes.REGEXP_DERIVATION)
with pytest.raises(
AltInterfaceException,
match='Optional parameter was given even though it can\'t be used!'
):
interface.algorithms(xml_input, AlgorithmTypes.REGEXP_TRIM,
'ThisShouldNotBeHere')
# Passing invalid algorithm
xml_input = read_input(AUTOMATA + '/NFSM1.xml')
with pytest.raises(AltInterfaceException,
match='Unknown algorithm passed as parameter!'):
interface.algorithms(xml_input, 'determinization')
with pytest.raises(AltInterfaceException,
match='Unknown algorithm passed as parameter!'):
interface.algorithms(xml_input, 'automaton_determinize')
# Passing invalid input type
with pytest.raises(AltInterfaceException, match='Entry overload'):
interface.algorithms(xml_input, AlgorithmTypes.AUTOMATON_MINIMIZATION)
# Passing invalid source or target type to conversion
with pytest.raises(
AltInterfaceException,
match='Unknown \'from\' parameter passed as parameter!'):
interface.conversion(xml_input, 'fsm', 'rg')
with pytest.raises(AltInterfaceException,
match='Unknown \'to\' parameter passed as parameter'):
interface.conversion(xml_input, 'fa', 'cfg')
with pytest.raises(AltInterfaceException,
match='Unknown \'from\' parameter passed as parameter'):
interface.conversion(xml_input, 'pda', 'cfg')
# Trying to convert ENFA to RG
xml_input = read_input(AUTOMATA + '/ENFA1.EPSILON.xml')
with pytest.raises(AltInterfaceException, match='Entry overload'):
interface.conversion(xml_input, 'fa', 'rg')
# Trying to compare FA and CFG
xml_input2 = read_input(GRAMMARS + '/CFG1.UNIT.xml')
with pytest.raises(AltInterfaceException, match='Entry overload'):
interface.comparison(xml_input, 'fa', xml_input2, 'cfg')