def test_expression_param_equals(self):
self.assertTrue(_expression_param('=50', None)(50))
self.assertFalse(_expression_param('=50', None)(42))
def test_expression_param_lesser(self):
self.assertTrue(_expression_param('<50', None)(49))
self.assertFalse(_expression_param('<50', None)(50))
self.assertFalse(_expression_param('<50', None)(51))
def test_expression_param_noval(self):
self.assertTrue(_expression_param(None, None)(None))
