132 lines
4.4 KiB
Python
132 lines
4.4 KiB
Python
"""Tests for the asdl parser in Parser/asdl.py"""
|
|
|
|
import importlib.machinery
|
|
import importlib.util
|
|
import os
|
|
from os.path import dirname
|
|
import sys
|
|
import sysconfig
|
|
import unittest
|
|
|
|
|
|
# This test is only relevant for from-source builds of Python.
|
|
if not sysconfig.is_python_build():
|
|
raise unittest.SkipTest('test irrelevant for an installed Python')
|
|
|
|
src_base = dirname(dirname(dirname(__file__)))
|
|
parser_dir = os.path.join(src_base, 'Parser')
|
|
|
|
|
|
class TestAsdlParser(unittest.TestCase):
|
|
@classmethod
|
|
def setUpClass(cls):
|
|
# Loads the asdl module dynamically, since it's not in a real importable
|
|
# package.
|
|
# Parses Python.asdl into an ast.Module and run the check on it.
|
|
# There's no need to do this for each test method, hence setUpClass.
|
|
sys.path.insert(0, parser_dir)
|
|
loader = importlib.machinery.SourceFileLoader(
|
|
'asdl', os.path.join(parser_dir, 'asdl.py'))
|
|
spec = importlib.util.spec_from_loader('asdl', loader)
|
|
module = importlib.util.module_from_spec(spec)
|
|
loader.exec_module(module)
|
|
cls.asdl = module
|
|
cls.mod = cls.asdl.parse(os.path.join(parser_dir, 'Python.asdl'))
|
|
cls.assertTrue(cls.asdl.check(cls.mod), 'Module validation failed')
|
|
|
|
@classmethod
|
|
def tearDownClass(cls):
|
|
del sys.path[0]
|
|
|
|
def setUp(self):
|
|
# alias stuff from the class, for convenience
|
|
self.asdl = TestAsdlParser.asdl
|
|
self.mod = TestAsdlParser.mod
|
|
self.types = self.mod.types
|
|
|
|
def test_module(self):
|
|
self.assertEqual(self.mod.name, 'Python')
|
|
self.assertIn('stmt', self.types)
|
|
self.assertIn('expr', self.types)
|
|
self.assertIn('mod', self.types)
|
|
|
|
def test_definitions(self):
|
|
defs = self.mod.dfns
|
|
self.assertIsInstance(defs[0], self.asdl.Type)
|
|
self.assertIsInstance(defs[0].value, self.asdl.Sum)
|
|
|
|
self.assertIsInstance(self.types['withitem'], self.asdl.Product)
|
|
self.assertIsInstance(self.types['alias'], self.asdl.Product)
|
|
|
|
def test_product(self):
|
|
alias = self.types['alias']
|
|
self.assertEqual(
|
|
str(alias),
|
|
'Product([Field(identifier, name), Field(identifier, asname, opt=True)], '
|
|
'[Field(int, lineno), Field(int, col_offset), '
|
|
'Field(int, end_lineno, opt=True), Field(int, end_col_offset, opt=True)])')
|
|
|
|
def test_attributes(self):
|
|
stmt = self.types['stmt']
|
|
self.assertEqual(len(stmt.attributes), 4)
|
|
self.assertEqual(repr(stmt.attributes[0]), 'Field(int, lineno)')
|
|
self.assertEqual(repr(stmt.attributes[1]), 'Field(int, col_offset)')
|
|
self.assertEqual(repr(stmt.attributes[2]), 'Field(int, end_lineno, opt=True)')
|
|
self.assertEqual(repr(stmt.attributes[3]), 'Field(int, end_col_offset, opt=True)')
|
|
|
|
def test_constructor_fields(self):
|
|
ehandler = self.types['excepthandler']
|
|
self.assertEqual(len(ehandler.types), 1)
|
|
self.assertEqual(len(ehandler.attributes), 4)
|
|
|
|
cons = ehandler.types[0]
|
|
self.assertIsInstance(cons, self.asdl.Constructor)
|
|
self.assertEqual(len(cons.fields), 3)
|
|
|
|
f0 = cons.fields[0]
|
|
self.assertEqual(f0.type, 'expr')
|
|
self.assertEqual(f0.name, 'type')
|
|
self.assertTrue(f0.opt)
|
|
|
|
f1 = cons.fields[1]
|
|
self.assertEqual(f1.type, 'identifier')
|
|
self.assertEqual(f1.name, 'name')
|
|
self.assertTrue(f1.opt)
|
|
|
|
f2 = cons.fields[2]
|
|
self.assertEqual(f2.type, 'stmt')
|
|
self.assertEqual(f2.name, 'body')
|
|
self.assertFalse(f2.opt)
|
|
self.assertTrue(f2.seq)
|
|
|
|
def test_visitor(self):
|
|
class CustomVisitor(self.asdl.VisitorBase):
|
|
def __init__(self):
|
|
super().__init__()
|
|
self.names_with_seq = []
|
|
|
|
def visitModule(self, mod):
|
|
for dfn in mod.dfns:
|
|
self.visit(dfn)
|
|
|
|
def visitType(self, type):
|
|
self.visit(type.value)
|
|
|
|
def visitSum(self, sum):
|
|
for t in sum.types:
|
|
self.visit(t)
|
|
|
|
def visitConstructor(self, cons):
|
|
for f in cons.fields:
|
|
if f.seq:
|
|
self.names_with_seq.append(cons.name)
|
|
|
|
v = CustomVisitor()
|
|
v.visit(self.types['mod'])
|
|
self.assertEqual(v.names_with_seq,
|
|
['Module', 'Module', 'Interactive', 'FunctionType'])
|
|
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|