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1"""test script for a few new invalid token catches"""
2
3import sys
4from test import support
5from test.support import os_helper
6from test.support import script_helper
7import unittest
8
9class EOFTestCase(unittest.TestCase):
10    def test_EOF_single_quote(self):
11        expect = "unterminated string literal (detected at line 1) (<string>, line 1)"
12        for quote in ("'", "\""):
13            try:
14                eval(f"""{quote}this is a test\
15                """)
16            except SyntaxError as msg:
17                self.assertEqual(str(msg), expect)
18                self.assertEqual(msg.offset, 1)
19            else:
20                raise support.TestFailed
21
22    def test_EOFS(self):
23        expect = ("unterminated triple-quoted string literal (detected at line 1) (<string>, line 1)")
24        try:
25            eval("""'''this is a test""")
26        except SyntaxError as msg:
27            self.assertEqual(str(msg), expect)
28            self.assertEqual(msg.offset, 1)
29        else:
30            raise support.TestFailed
31
32    def test_EOFS_with_file(self):
33        expect = ("(<string>, line 1)")
34        with os_helper.temp_dir() as temp_dir:
35            file_name = script_helper.make_script(temp_dir, 'foo', """'''this is \na \ntest""")
36            rc, out, err = script_helper.assert_python_failure(file_name)
37        self.assertIn(b'unterminated triple-quoted string literal (detected at line 3)', err)
38
39    def test_eof_with_line_continuation(self):
40        expect = "unexpected EOF while parsing (<string>, line 1)"
41        try:
42            compile('"\\xhh" \\',  '<string>', 'exec', dont_inherit=True)
43        except SyntaxError as msg:
44            self.assertEqual(str(msg), expect)
45        else:
46            raise support.TestFailed
47
48    def test_line_continuation_EOF(self):
49        """A continuation at the end of input must be an error; bpo2180."""
50        expect = 'unexpected EOF while parsing (<string>, line 1)'
51        with self.assertRaises(SyntaxError) as excinfo:
52            exec('x = 5\\')
53        self.assertEqual(str(excinfo.exception), expect)
54        with self.assertRaises(SyntaxError) as excinfo:
55            exec('\\')
56        self.assertEqual(str(excinfo.exception), expect)
57
58    @unittest.skipIf(not sys.executable, "sys.executable required")
59    def test_line_continuation_EOF_from_file_bpo2180(self):
60        """Ensure tok_nextc() does not add too many ending newlines."""
61        with os_helper.temp_dir() as temp_dir:
62            file_name = script_helper.make_script(temp_dir, 'foo', '\\')
63            rc, out, err = script_helper.assert_python_failure(file_name)
64            self.assertIn(b'unexpected EOF while parsing', err)
65            self.assertIn(b'line 1', err)
66            self.assertIn(b'\\', err)
67
68            file_name = script_helper.make_script(temp_dir, 'foo', 'y = 6\\')
69            rc, out, err = script_helper.assert_python_failure(file_name)
70            self.assertIn(b'unexpected EOF while parsing', err)
71            self.assertIn(b'line 1', err)
72            self.assertIn(b'y = 6\\', err)
73
74if __name__ == "__main__":
75    unittest.main()
76