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# Test various flavors of legal and illegal future statements import unittest from test import support import os import re rx = re.compile(r'\((\S+).py, line (\d+)') def get_error_location(msg): mo = rx.search(str(msg)) return mo.group(1, 2) class FutureTest(unittest.TestCase): def check_syntax_error(self, err, basename, lineno, offset=0): self.assertIn('%s.py, line %d' % (basename, lineno), str(err)) self.assertEqual(os.path.basename(err.filename), basename + '.py') self.assertEqual(err.lineno, lineno) self.assertEqual(err.offset, offset) def test_future1(self): with support.CleanImport('future_test1'): from test import future_test1 self.assertEqual(future_test1.result, 6) def test_future2(self): with support.CleanImport('future_test2'): from test import future_test2 self.assertEqual(future_test2.result, 6) def test_future3(self): with support.CleanImport('test_future3'): from test import test_future3 def test_badfuture3(self): with self.assertRaises(SyntaxError) as cm: from test import badsyntax_future3 self.check_syntax_error(cm.exception, "badsyntax_future3", 3) def test_badfuture4(self): with self.assertRaises(SyntaxError) as cm: from test import badsyntax_future4 self.check_syntax_error(cm.exception, "badsyntax_future4", 3) def test_badfuture5(self): with self.assertRaises(SyntaxError) as cm: from test import badsyntax_future5 self.check_syntax_error(cm.exception, "badsyntax_future5", 4) def test_badfuture6(self): with self.assertRaises(SyntaxError) as cm: from test import badsyntax_future6 self.check_syntax_error(cm.exception, "badsyntax_future6", 3) def test_badfuture7(self): with self.assertRaises(SyntaxError) as cm: from test import badsyntax_future7 self.check_syntax_error(cm.exception, "badsyntax_future7", 3, 53) def test_badfuture8(self): with self.assertRaises(SyntaxError) as cm: from test import badsyntax_future8 self.check_syntax_error(cm.exception, "badsyntax_future8", 3) def test_badfuture9(self): with self.assertRaises(SyntaxError) as cm: from test import badsyntax_future9 self.check_syntax_error(cm.exception, "badsyntax_future9", 3, 0) def test_badfuture10(self): with self.assertRaises(SyntaxError) as cm: from test import badsyntax_future10 self.check_syntax_error(cm.exception, "badsyntax_future10", 3, 0) def test_parserhack(self): # test that the parser.c::future_hack function works as expected # Note: although this test must pass, it's not testing the original # bug as of 2.6 since the with statement is not optional and # the parser hack disabled. If a new keyword is introduced in # 2.6, change this to refer to the new future import. try: exec("from __future__ import print_function; print 0") except SyntaxError: pass else: self.fail("syntax error didn't occur") try: exec("from __future__ import (print_function); print 0") except SyntaxError: pass else: self.fail("syntax error didn't occur") def test_multiple_features(self): with support.CleanImport("test.test_future5"): from test import test_future5 def test_unicode_literals_exec(self): scope = {} exec("from __future__ import unicode_literals; x = ''", {}, scope) self.assertIsInstance(scope["x"], str) if __name__ == "__main__": unittest.main()