class TestPrologTermToPrefixGdl():
def setUp(self):
self.frame = Frame()
def tearDown(self):
self.frame.discard()
def test_atom_term(self):
assert_equal(prolog_term_to_prefix_gdl(Term.from_atom_name('foo')),
'foo')
def test_variable_term(self):
assert_equal(prolog_term_to_prefix_gdl(Term())[0], '?')
def test_compound_term(self):
assert_equal(prolog_term_to_prefix_gdl(
Functor('foo', 2)(Term.from_atom_name('bar'),
Term.from_atom_name('2'))),
'(foo bar 2)')
class TestPrefixGdlStatementToPrologAtom():
def setUp(self):
self.frame = Frame()
def tearDown(self):
self.frame.discard()
@staticmethod
def check_parse_statement(target, gdl_statement):
assert_equal(prefix_gdl_statement_to_prolog(gdl_statement),
target)
@staticmethod
def check_parse_statements(target, *gdl_statements):
assert_equal(
prefix_gdl_statements_to_prolog('\n'.join(gdl_statements)),
target)
@staticmethod
def check_parse_atoms(*atoms):
terms = []
for atom in atoms:
term = Term.from_atom_name(atom)
terms.append(term)
TestPrefixGdlStatementToPrologAtom.check_parse_statement(
term, atom)
TestPrefixGdlStatementToPrologAtom.check_parse_statements(
Term.from_list_terms(terms), '\n'.join(atoms))
def test_empty_string(self):
self.check_parse_atoms()
def test_atom_word(self):
self.check_parse_atoms('word')
def test_atom_multiple_words(self):
self.check_parse_atoms('here', 'are', 'some', 'words')
def test_atom_number(self):
self.check_parse_atoms('123')
def test_atom_interior_question_mark(self):
self.check_parse_atoms('foo?bar')
def test_atom_suffix_question_mark(self):
self.check_parse_atoms('foo?')
def test_atom_interior_comma(self):
self.check_parse_atoms('foo,bar')
def test_atom_integer(self):
self.check_parse_atoms('1', '0', '-1')
@staticmethod
def check_parse_variables(*variables):
variables = ['?' + var for var in variables]
for variable in variables:
assert_true(prefix_gdl_statement_to_prolog(variable).is_variable())
term_list = prefix_gdl_statements_to_prolog('\n'.join(variables))
terms = []
# Check that all variable terms are unique
while not term_list.is_nil():
term = term_list.get_arg(0)
assert_not_in(term, terms)
terms.append(term)
term_list = term_list.get_arg(1)
assert_equal(len(terms), len(variables))
def test_variable_word(self):
self.check_parse_variables('word')
def test_variables(self):
self.check_parse_variables('some', 'variables', 'here')
def test_variables_repeating(self):
self.check_parse_variables('a', 'a', 'b', 'a', 'b')
def test_variables_caps(self):
self.check_parse_variables('Aa')
def test_variables_underscore(self):
self.check_parse_variables('_b')
def test_variables_numbers(self):
self.check_parse_variables('123')
def test_compound_term_one_atom(self):
assert_equal(prefix_gdl_statement_to_prolog('(foo arg)'),
Functor('foo', 1)(Term.from_atom_name('arg')))
def test_compound_term_mixed_atomic(self):
term = prefix_gdl_statement_to_prolog('(foo arg1 ?arg2 arg3)')
assert_equal(term.get_functor(), Functor('foo', 3))
assert_equal(term.get_arg(0), Term.from_atom_name('arg1'))
assert_true(term.get_arg(1).is_variable())
assert_equal(term.get_arg(2), Term.from_atom_name('arg3'))
def test_compound_repeated_variable(self):
term = prefix_gdl_statement_to_prolog('(foo ?X ?X)')
assert_equal(term.get_functor(), Functor('foo', 2))
assert_true(term.get_arg(0).is_variable())
assert_true(term.get_arg(1).is_variable())
assert_equal(term.get_arg(0), term.get_arg(1))
def test_compound_term_nexted(self):
assert_equal(
prefix_gdl_statement_to_prolog('(foo (bar 1 2) (baz 3))'),
Functor('foo', 2)(Functor('bar', 2)(Term.from_atom_name('1'),
Term.from_atom_name('2')),
Functor('baz', 1)(Term.from_atom_name('3'))))
def test_compound_term_no_args(self):
assert_equal(prefix_gdl_statement_to_prolog('(foo)'),
Functor('foo', 0)())
def test_rule_symbol_translation(self):
assert_equal(prefix_gdl_statement_to_prolog('(<= foo bar)'),
Functor(':-', 2)(Term.from_atom_name('foo'),
Term.from_atom_name('bar')))
def test_rule_variadic_translation(self):
rule = Functor(':-', 2)
and_ = Functor(',', 2)
assert_equal(
prefix_gdl_statement_to_prolog('(<= foo 1 2 3 4)'),
rule(Term.from_atom_name('foo'),
and_(Term.from_atom_name('1'),
and_(Term.from_atom_name('2'),
and_(Term.from_atom_name('3'),
Term.from_atom_name('4'))))))