def test_malformed_equations(self):
bad_equations = [
'z',
'xy',
]
for bad_equation in bad_equations:
with self.assertRaises(BadInputError):
regex_check(bad_equation)
def test_basic_operations(self):
operations = ['+', '-', '*', '/', '**']
for op in operations:
equation_str = 'x%sy' % op
self.assertTrue(regex_check(equation_str))
def test_operations(self):
operations = ['sin', 'cos', 'exp', 'log']
for op in operations:
equation_str = '%s(x)' % op
self.assertTrue(regex_check(equation_str))
def test_variables(self):
for symbol in ('x', 'y'):
self.assertTrue(regex_check(symbol))
