def test_missing_finish_node(self):
expression = Expression()
expression.add_node(1, Node(NodeType.START))
expression.add_node(2, Node(NodeType.INFO, 'validation test'))
expression.add_edge(1, 2)
with self.assertRaises(RuntimeError):
validator.check_finish_node(expression)
def test_unnecessary_finish_node_value(self):
expression = Expression()
expression.add_node(1, Node(NodeType.START))
expression.add_node(2, Node(NodeType.FINISH, 'finish'))
expression.add_edge(1, 2)
with self.assertRaises(RuntimeError):
validator.check_unnecessary_node_values(expression)
def test_missing_ground_node_target(self):
expression = Expression()
expression.add_node(1, Node(NodeType.START))
expression.add_node(2, Node(NodeType.FINISH))
expression.add_node(3, Node(NodeType.GROUND))
expression.add_edge(1, 2)
with self.assertRaises(RuntimeError):
validator.check_invalid_connections(expression)
def test_missing_finish_node_source(self):
expression = Expression()
expression.add_node(1, Node(NodeType.START))
expression.add_node(2, Node(NodeType.FINISH))
expression.add_node(3, Node(NodeType.ERROR, 'error'))
expression.add_edge(1, 3)
with self.assertRaises(RuntimeError):
validator.check_invalid_connections(expression)
def test_unnecessary_ground_node_value(self):
expression = Expression()
expression.add_node(1, Node(NodeType.START))
expression.add_node(2, Node(NodeType.FINISH))
expression.add_node(3, Node(NodeType.GROUND, 'ground'))
expression.add_edge(1, 2)
with self.assertRaises(RuntimeError):
validator.check_unnecessary_node_values(expression)
def test_missing_router_node_value(self):
expression = Expression()
expression.add_node(1, Node(NodeType.START))
expression.add_node(2, Node(NodeType.FINISH))
expression.add_node(3, Node(NodeType.ROUTER))
expression.add_edge(1, 2)
expression.add_edge(2, 3)
with self.assertRaises(RuntimeError):
validator.check_missing_node_values(expression)
def test_missing_transformation_node_value(self):
expression = Expression()
expression.add_node(1, Node(NodeType.START))
expression.add_node(2, Node(NodeType.FINISH))
expression.add_node(3, Node(NodeType.TRANSFORMATION))
expression.add_edge(1, 2)
expression.add_edge(2, 3)
with self.assertRaises(RuntimeError):
validator.check_missing_node_values(expression)
def test_missing_token_node_source(self):
expression = Expression()
expression.add_node(1, Node(NodeType.START))
expression.add_node(2, Node(NodeType.FINISH))
expression.add_node(3, Node(NodeType.TOKEN, 'token'))
expression.add_edge(1, 2)
expression.add_edge(3, 2)
with self.assertRaises(RuntimeError):
validator.check_invalid_connections(expression)
def test_multiple_ground_nodes(self):
expression = Expression()
expression.add_node(1, Node(NodeType.START))
expression.add_node(2, Node(NodeType.FINISH))
expression.add_node(3, Node(NodeType.GROUND))
expression.add_node(4, Node(NodeType.GROUND))
expression.add_edge(1, 2)
with self.assertRaises(RuntimeError):
validator.check_ground_nodes(expression)
def test_missing_operation_node_target(self):
expression = Expression()
expression.add_node(1, Node(NodeType.START))
expression.add_node(2, Node(NodeType.FINISH))
expression.add_node(3, Node(NodeType.OPERATION, 'operation'))
expression.add_edge(1, 2)
expression.add_edge(1, 3)
with self.assertRaises(RuntimeError):
validator.check_invalid_connections(expression)
def test_invalid_start_node_source(self):
expression = Expression()
expression.add_node(1, Node(NodeType.START))
expression.add_node(2, Node(NodeType.FINISH))
expression.add_node(3, Node(NodeType.GROUND))
expression.add_edge(1, 2)
expression.add_edge(3, 1)
with self.assertRaises(RuntimeError):
validator.check_invalid_connections(expression)
def test_unnecessary_connection_node_value(self):
expression = Expression()
expression.add_node(1, Node(NodeType.START))
expression.add_node(2, Node(NodeType.CONNECTION, 'connection'))
expression.add_node(3, Node(NodeType.FINISH))
expression.add_edge(1, 2)
expression.add_edge(2, 3)
with self.assertRaises(RuntimeError):
validator.check_unnecessary_node_values(expression)
def test_multiple_start_node(self):
expression = Expression()
expression.add_node(1, Node(NodeType.START))
expression.add_node(2, Node(NodeType.START))
expression.add_node(3, Node(NodeType.INFO, 'validation test'))
expression.add_node(4, Node(NodeType.FINISH))
expression.add_edge(1, 3)
expression.add_edge(2, 3)
expression.add_edge(3, 4)
with self.assertRaises(RuntimeError):
validator.check_start_node(expression)
def test_referenced_expressions(self):
expression = Expression()
expression.add_node(1, Node(NodeType.START))
expression.add_node(2, Node(NodeType.FINISH))
expression.add_node(3, Node(NodeType.EXPRESSION, 'expression'))
expression.add_edge(1, 2)
expression.add_edge(1, 3)
expression.add_edge(3, 2)
grammar = Grammar()
grammar.add_expression('sample', expression)
with self.assertRaises(RuntimeError):
validator.check_referenced_expressions(grammar)
def load_expressions(path):
"""
Load expressions from a grammar file.
:param path: the path of the file
:return: dictionary of expression objects
"""
expressions = {}
expression_index = 0
if not os.path.isfile(path):
raise ValueError('Invalid grammar file path "{}"!'.format(path))
with open(path, 'r') as grammar_file:
expression_name = ''
for line in grammar_file:
words = list(filter(None, line.split(' ')))
if len(words) > 0:
if words[0] == 'expression':
expression_name = get_string_content(line)
expressions[expression_name] = Expression(expression_index)
expression_index += 1
elif len(words) >= 5:
node_id = int(words[0])
node_type = words[1]
node_value = get_string_content(line)
node = Node(node_type, node_value)
expressions[expression_name].add_node(node_id, node)
elif len(words) == 2:
source_id = int(words[0])
target_id = int(words[1])
expressions[expression_name].add_edge(source_id, target_id)
return expressions