724 lines
28 KiB
Python
724 lines
28 KiB
Python
from test import test_support
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from tokenize import (untokenize, generate_tokens, NUMBER, NAME, OP,
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STRING, ENDMARKER, tok_name, Untokenizer, tokenize)
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from StringIO import StringIO
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import os
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from unittest import TestCase
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class TokenizeTest(TestCase):
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# Tests for the tokenize module.
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# The tests can be really simple. Given a small fragment of source
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# code, print out a table with tokens. The ENDMARKER is omitted for
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# brevity.
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def check_tokenize(self, s, expected):
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# Format the tokens in s in a table format.
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# The ENDMARKER is omitted.
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result = []
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f = StringIO(s)
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for type, token, start, end, line in generate_tokens(f.readline):
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if type == ENDMARKER:
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break
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type = tok_name[type]
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result.append(" %(type)-10.10s %(token)-13.13r %(start)s %(end)s" %
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locals())
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self.assertEqual(result,
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expected.rstrip().splitlines())
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def test_basic(self):
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self.check_tokenize("1 + 1", """\
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NUMBER '1' (1, 0) (1, 1)
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OP '+' (1, 2) (1, 3)
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NUMBER '1' (1, 4) (1, 5)
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""")
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self.check_tokenize("if False:\n"
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" # NL\n"
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" True = False # NEWLINE\n", """\
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NAME 'if' (1, 0) (1, 2)
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NAME 'False' (1, 3) (1, 8)
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OP ':' (1, 8) (1, 9)
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NEWLINE '\\n' (1, 9) (1, 10)
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COMMENT '# NL' (2, 4) (2, 8)
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NL '\\n' (2, 8) (2, 9)
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INDENT ' ' (3, 0) (3, 4)
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NAME 'True' (3, 4) (3, 8)
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OP '=' (3, 9) (3, 10)
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NAME 'False' (3, 11) (3, 16)
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COMMENT '# NEWLINE' (3, 17) (3, 26)
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NEWLINE '\\n' (3, 26) (3, 27)
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DEDENT '' (4, 0) (4, 0)
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""")
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indent_error_file = """\
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def k(x):
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x += 2
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x += 5
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"""
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with self.assertRaisesRegexp(IndentationError,
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"unindent does not match any "
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"outer indentation level"):
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for tok in generate_tokens(StringIO(indent_error_file).readline):
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pass
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def test_int(self):
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# Ordinary integers and binary operators
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self.check_tokenize("0xff <= 255", """\
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NUMBER '0xff' (1, 0) (1, 4)
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OP '<=' (1, 5) (1, 7)
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NUMBER '255' (1, 8) (1, 11)
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""")
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self.check_tokenize("0b10 <= 255", """\
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NUMBER '0b10' (1, 0) (1, 4)
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OP '<=' (1, 5) (1, 7)
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NUMBER '255' (1, 8) (1, 11)
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""")
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self.check_tokenize("0o123 <= 0123", """\
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NUMBER '0o123' (1, 0) (1, 5)
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OP '<=' (1, 6) (1, 8)
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NUMBER '0123' (1, 9) (1, 13)
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""")
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self.check_tokenize("01234567 > ~0x15", """\
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NUMBER '01234567' (1, 0) (1, 8)
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OP '>' (1, 9) (1, 10)
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OP '~' (1, 11) (1, 12)
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NUMBER '0x15' (1, 12) (1, 16)
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""")
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self.check_tokenize("2134568 != 01231515", """\
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NUMBER '2134568' (1, 0) (1, 7)
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OP '!=' (1, 8) (1, 10)
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NUMBER '01231515' (1, 11) (1, 19)
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""")
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self.check_tokenize("(-124561-1) & 0200000000", """\
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OP '(' (1, 0) (1, 1)
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OP '-' (1, 1) (1, 2)
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NUMBER '124561' (1, 2) (1, 8)
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OP '-' (1, 8) (1, 9)
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NUMBER '1' (1, 9) (1, 10)
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OP ')' (1, 10) (1, 11)
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OP '&' (1, 12) (1, 13)
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NUMBER '0200000000' (1, 14) (1, 24)
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""")
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self.check_tokenize("0xdeadbeef != -1", """\
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NUMBER '0xdeadbeef' (1, 0) (1, 10)
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OP '!=' (1, 11) (1, 13)
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OP '-' (1, 14) (1, 15)
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NUMBER '1' (1, 15) (1, 16)
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""")
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self.check_tokenize("0xdeadc0de & 012345", """\
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NUMBER '0xdeadc0de' (1, 0) (1, 10)
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OP '&' (1, 11) (1, 12)
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NUMBER '012345' (1, 13) (1, 19)
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""")
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self.check_tokenize("0xFF & 0x15 | 1234", """\
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NUMBER '0xFF' (1, 0) (1, 4)
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OP '&' (1, 5) (1, 6)
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NUMBER '0x15' (1, 7) (1, 11)
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OP '|' (1, 12) (1, 13)
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NUMBER '1234' (1, 14) (1, 18)
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""")
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def test_long(self):
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# Long integers
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self.check_tokenize("x = 0L", """\
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NAME 'x' (1, 0) (1, 1)
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OP '=' (1, 2) (1, 3)
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NUMBER '0L' (1, 4) (1, 6)
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""")
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self.check_tokenize("x = 0xfffffffffff", """\
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NAME 'x' (1, 0) (1, 1)
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OP '=' (1, 2) (1, 3)
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NUMBER '0xffffffffff (1, 4) (1, 17)
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""")
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self.check_tokenize("x = 123141242151251616110l", """\
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NAME 'x' (1, 0) (1, 1)
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OP '=' (1, 2) (1, 3)
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NUMBER '123141242151 (1, 4) (1, 26)
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""")
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self.check_tokenize("x = -15921590215012591L", """\
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NAME 'x' (1, 0) (1, 1)
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OP '=' (1, 2) (1, 3)
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OP '-' (1, 4) (1, 5)
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NUMBER '159215902150 (1, 5) (1, 23)
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""")
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def test_float(self):
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# Floating point numbers
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self.check_tokenize("x = 3.14159", """\
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NAME 'x' (1, 0) (1, 1)
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OP '=' (1, 2) (1, 3)
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NUMBER '3.14159' (1, 4) (1, 11)
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""")
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self.check_tokenize("x = 314159.", """\
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NAME 'x' (1, 0) (1, 1)
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OP '=' (1, 2) (1, 3)
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NUMBER '314159.' (1, 4) (1, 11)
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""")
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self.check_tokenize("x = .314159", """\
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NAME 'x' (1, 0) (1, 1)
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OP '=' (1, 2) (1, 3)
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NUMBER '.314159' (1, 4) (1, 11)
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""")
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self.check_tokenize("x = 3e14159", """\
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NAME 'x' (1, 0) (1, 1)
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OP '=' (1, 2) (1, 3)
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NUMBER '3e14159' (1, 4) (1, 11)
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""")
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self.check_tokenize("x = 3E123", """\
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NAME 'x' (1, 0) (1, 1)
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OP '=' (1, 2) (1, 3)
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NUMBER '3E123' (1, 4) (1, 9)
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""")
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self.check_tokenize("x+y = 3e-1230", """\
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NAME 'x' (1, 0) (1, 1)
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OP '+' (1, 1) (1, 2)
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NAME 'y' (1, 2) (1, 3)
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OP '=' (1, 4) (1, 5)
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NUMBER '3e-1230' (1, 6) (1, 13)
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""")
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self.check_tokenize("x = 3.14e159", """\
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NAME 'x' (1, 0) (1, 1)
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OP '=' (1, 2) (1, 3)
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NUMBER '3.14e159' (1, 4) (1, 12)
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""")
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def test_string(self):
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# String literals
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self.check_tokenize("x = ''; y = \"\"", """\
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NAME 'x' (1, 0) (1, 1)
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OP '=' (1, 2) (1, 3)
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STRING "''" (1, 4) (1, 6)
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OP ';' (1, 6) (1, 7)
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NAME 'y' (1, 8) (1, 9)
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OP '=' (1, 10) (1, 11)
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STRING '""' (1, 12) (1, 14)
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""")
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self.check_tokenize("x = '\"'; y = \"'\"", """\
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NAME 'x' (1, 0) (1, 1)
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OP '=' (1, 2) (1, 3)
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STRING '\\'"\\'' (1, 4) (1, 7)
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OP ';' (1, 7) (1, 8)
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NAME 'y' (1, 9) (1, 10)
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OP '=' (1, 11) (1, 12)
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STRING '"\\'"' (1, 13) (1, 16)
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""")
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self.check_tokenize("x = \"doesn't \"shrink\", does it\"", """\
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NAME 'x' (1, 0) (1, 1)
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OP '=' (1, 2) (1, 3)
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STRING '"doesn\\'t "' (1, 4) (1, 14)
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NAME 'shrink' (1, 14) (1, 20)
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STRING '", does it"' (1, 20) (1, 31)
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""")
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self.check_tokenize("x = u'abc' + U'ABC'", """\
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NAME 'x' (1, 0) (1, 1)
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OP '=' (1, 2) (1, 3)
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STRING "u'abc'" (1, 4) (1, 10)
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OP '+' (1, 11) (1, 12)
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STRING "U'ABC'" (1, 13) (1, 19)
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""")
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self.check_tokenize('y = u"ABC" + U"ABC"', """\
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NAME 'y' (1, 0) (1, 1)
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OP '=' (1, 2) (1, 3)
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STRING 'u"ABC"' (1, 4) (1, 10)
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OP '+' (1, 11) (1, 12)
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STRING 'U"ABC"' (1, 13) (1, 19)
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""")
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self.check_tokenize("x = ur'abc' + Ur'ABC' + uR'ABC' + UR'ABC'", """\
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NAME 'x' (1, 0) (1, 1)
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OP '=' (1, 2) (1, 3)
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STRING "ur'abc'" (1, 4) (1, 11)
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OP '+' (1, 12) (1, 13)
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STRING "Ur'ABC'" (1, 14) (1, 21)
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OP '+' (1, 22) (1, 23)
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STRING "uR'ABC'" (1, 24) (1, 31)
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OP '+' (1, 32) (1, 33)
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STRING "UR'ABC'" (1, 34) (1, 41)
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""")
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self.check_tokenize('y = ur"abc" + Ur"ABC" + uR"ABC" + UR"ABC"', """\
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NAME 'y' (1, 0) (1, 1)
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OP '=' (1, 2) (1, 3)
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STRING 'ur"abc"' (1, 4) (1, 11)
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OP '+' (1, 12) (1, 13)
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STRING 'Ur"ABC"' (1, 14) (1, 21)
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OP '+' (1, 22) (1, 23)
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STRING 'uR"ABC"' (1, 24) (1, 31)
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OP '+' (1, 32) (1, 33)
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STRING 'UR"ABC"' (1, 34) (1, 41)
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""")
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self.check_tokenize("b'abc' + B'abc'", """\
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STRING "b'abc'" (1, 0) (1, 6)
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OP '+' (1, 7) (1, 8)
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STRING "B'abc'" (1, 9) (1, 15)
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""")
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self.check_tokenize('b"abc" + B"abc"', """\
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STRING 'b"abc"' (1, 0) (1, 6)
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OP '+' (1, 7) (1, 8)
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STRING 'B"abc"' (1, 9) (1, 15)
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""")
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self.check_tokenize("br'abc' + bR'abc' + Br'abc' + BR'abc'", """\
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STRING "br'abc'" (1, 0) (1, 7)
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OP '+' (1, 8) (1, 9)
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STRING "bR'abc'" (1, 10) (1, 17)
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OP '+' (1, 18) (1, 19)
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STRING "Br'abc'" (1, 20) (1, 27)
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OP '+' (1, 28) (1, 29)
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STRING "BR'abc'" (1, 30) (1, 37)
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""")
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self.check_tokenize('br"abc" + bR"abc" + Br"abc" + BR"abc"', """\
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STRING 'br"abc"' (1, 0) (1, 7)
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OP '+' (1, 8) (1, 9)
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STRING 'bR"abc"' (1, 10) (1, 17)
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OP '+' (1, 18) (1, 19)
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STRING 'Br"abc"' (1, 20) (1, 27)
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OP '+' (1, 28) (1, 29)
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STRING 'BR"abc"' (1, 30) (1, 37)
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""")
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def test_function(self):
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self.check_tokenize("def d22(a, b, c=2, d=2, *k): pass", """\
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NAME 'def' (1, 0) (1, 3)
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NAME 'd22' (1, 4) (1, 7)
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OP '(' (1, 7) (1, 8)
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NAME 'a' (1, 8) (1, 9)
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OP ',' (1, 9) (1, 10)
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NAME 'b' (1, 11) (1, 12)
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OP ',' (1, 12) (1, 13)
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NAME 'c' (1, 14) (1, 15)
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OP '=' (1, 15) (1, 16)
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NUMBER '2' (1, 16) (1, 17)
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OP ',' (1, 17) (1, 18)
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NAME 'd' (1, 19) (1, 20)
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OP '=' (1, 20) (1, 21)
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NUMBER '2' (1, 21) (1, 22)
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OP ',' (1, 22) (1, 23)
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OP '*' (1, 24) (1, 25)
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NAME 'k' (1, 25) (1, 26)
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OP ')' (1, 26) (1, 27)
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OP ':' (1, 27) (1, 28)
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NAME 'pass' (1, 29) (1, 33)
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""")
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self.check_tokenize("def d01v_(a=1, *k, **w): pass", """\
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NAME 'def' (1, 0) (1, 3)
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NAME 'd01v_' (1, 4) (1, 9)
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OP '(' (1, 9) (1, 10)
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NAME 'a' (1, 10) (1, 11)
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OP '=' (1, 11) (1, 12)
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NUMBER '1' (1, 12) (1, 13)
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OP ',' (1, 13) (1, 14)
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OP '*' (1, 15) (1, 16)
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NAME 'k' (1, 16) (1, 17)
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OP ',' (1, 17) (1, 18)
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OP '**' (1, 19) (1, 21)
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NAME 'w' (1, 21) (1, 22)
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OP ')' (1, 22) (1, 23)
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OP ':' (1, 23) (1, 24)
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NAME 'pass' (1, 25) (1, 29)
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""")
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def test_comparison(self):
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# Comparison
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self.check_tokenize("if 1 < 1 > 1 == 1 >= 5 <= 0x15 <= 0x12 != " +
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"1 and 5 in 1 not in 1 is 1 or 5 is not 1: pass", """\
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NAME 'if' (1, 0) (1, 2)
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NUMBER '1' (1, 3) (1, 4)
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OP '<' (1, 5) (1, 6)
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NUMBER '1' (1, 7) (1, 8)
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OP '>' (1, 9) (1, 10)
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NUMBER '1' (1, 11) (1, 12)
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OP '==' (1, 13) (1, 15)
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NUMBER '1' (1, 16) (1, 17)
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OP '>=' (1, 18) (1, 20)
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NUMBER '5' (1, 21) (1, 22)
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OP '<=' (1, 23) (1, 25)
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NUMBER '0x15' (1, 26) (1, 30)
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OP '<=' (1, 31) (1, 33)
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NUMBER '0x12' (1, 34) (1, 38)
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OP '!=' (1, 39) (1, 41)
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NUMBER '1' (1, 42) (1, 43)
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NAME 'and' (1, 44) (1, 47)
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NUMBER '5' (1, 48) (1, 49)
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NAME 'in' (1, 50) (1, 52)
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NUMBER '1' (1, 53) (1, 54)
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NAME 'not' (1, 55) (1, 58)
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NAME 'in' (1, 59) (1, 61)
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NUMBER '1' (1, 62) (1, 63)
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NAME 'is' (1, 64) (1, 66)
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NUMBER '1' (1, 67) (1, 68)
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NAME 'or' (1, 69) (1, 71)
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NUMBER '5' (1, 72) (1, 73)
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NAME 'is' (1, 74) (1, 76)
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NAME 'not' (1, 77) (1, 80)
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NUMBER '1' (1, 81) (1, 82)
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OP ':' (1, 82) (1, 83)
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NAME 'pass' (1, 84) (1, 88)
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""")
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def test_shift(self):
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# Shift
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self.check_tokenize("x = 1 << 1 >> 5", """\
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NAME 'x' (1, 0) (1, 1)
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OP '=' (1, 2) (1, 3)
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NUMBER '1' (1, 4) (1, 5)
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OP '<<' (1, 6) (1, 8)
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NUMBER '1' (1, 9) (1, 10)
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OP '>>' (1, 11) (1, 13)
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NUMBER '5' (1, 14) (1, 15)
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""")
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def test_additive(self):
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# Additive
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self.check_tokenize("x = 1 - y + 15 - 01 + 0x124 + z + a[5]", """\
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NAME 'x' (1, 0) (1, 1)
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OP '=' (1, 2) (1, 3)
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NUMBER '1' (1, 4) (1, 5)
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OP '-' (1, 6) (1, 7)
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NAME 'y' (1, 8) (1, 9)
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OP '+' (1, 10) (1, 11)
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NUMBER '15' (1, 12) (1, 14)
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OP '-' (1, 15) (1, 16)
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NUMBER '01' (1, 17) (1, 19)
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OP '+' (1, 20) (1, 21)
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NUMBER '0x124' (1, 22) (1, 27)
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OP '+' (1, 28) (1, 29)
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NAME 'z' (1, 30) (1, 31)
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OP '+' (1, 32) (1, 33)
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NAME 'a' (1, 34) (1, 35)
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OP '[' (1, 35) (1, 36)
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NUMBER '5' (1, 36) (1, 37)
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OP ']' (1, 37) (1, 38)
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""")
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def test_multiplicative(self):
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# Multiplicative
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self.check_tokenize("x = 1//1*1/5*12%0x12", """\
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NAME 'x' (1, 0) (1, 1)
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OP '=' (1, 2) (1, 3)
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NUMBER '1' (1, 4) (1, 5)
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OP '//' (1, 5) (1, 7)
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NUMBER '1' (1, 7) (1, 8)
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OP '*' (1, 8) (1, 9)
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NUMBER '1' (1, 9) (1, 10)
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OP '/' (1, 10) (1, 11)
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NUMBER '5' (1, 11) (1, 12)
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OP '*' (1, 12) (1, 13)
|
|
NUMBER '12' (1, 13) (1, 15)
|
|
OP '%' (1, 15) (1, 16)
|
|
NUMBER '0x12' (1, 16) (1, 20)
|
|
""")
|
|
|
|
def test_unary(self):
|
|
# Unary
|
|
self.check_tokenize("~1 ^ 1 & 1 |1 ^ -1", """\
|
|
OP '~' (1, 0) (1, 1)
|
|
NUMBER '1' (1, 1) (1, 2)
|
|
OP '^' (1, 3) (1, 4)
|
|
NUMBER '1' (1, 5) (1, 6)
|
|
OP '&' (1, 7) (1, 8)
|
|
NUMBER '1' (1, 9) (1, 10)
|
|
OP '|' (1, 11) (1, 12)
|
|
NUMBER '1' (1, 12) (1, 13)
|
|
OP '^' (1, 14) (1, 15)
|
|
OP '-' (1, 16) (1, 17)
|
|
NUMBER '1' (1, 17) (1, 18)
|
|
""")
|
|
self.check_tokenize("-1*1/1+1*1//1 - ---1**1", """\
|
|
OP '-' (1, 0) (1, 1)
|
|
NUMBER '1' (1, 1) (1, 2)
|
|
OP '*' (1, 2) (1, 3)
|
|
NUMBER '1' (1, 3) (1, 4)
|
|
OP '/' (1, 4) (1, 5)
|
|
NUMBER '1' (1, 5) (1, 6)
|
|
OP '+' (1, 6) (1, 7)
|
|
NUMBER '1' (1, 7) (1, 8)
|
|
OP '*' (1, 8) (1, 9)
|
|
NUMBER '1' (1, 9) (1, 10)
|
|
OP '//' (1, 10) (1, 12)
|
|
NUMBER '1' (1, 12) (1, 13)
|
|
OP '-' (1, 14) (1, 15)
|
|
OP '-' (1, 16) (1, 17)
|
|
OP '-' (1, 17) (1, 18)
|
|
OP '-' (1, 18) (1, 19)
|
|
NUMBER '1' (1, 19) (1, 20)
|
|
OP '**' (1, 20) (1, 22)
|
|
NUMBER '1' (1, 22) (1, 23)
|
|
""")
|
|
|
|
def test_selector(self):
|
|
# Selector
|
|
self.check_tokenize("import sys, time\n"
|
|
"x = sys.modules['time'].time()", """\
|
|
NAME 'import' (1, 0) (1, 6)
|
|
NAME 'sys' (1, 7) (1, 10)
|
|
OP ',' (1, 10) (1, 11)
|
|
NAME 'time' (1, 12) (1, 16)
|
|
NEWLINE '\\n' (1, 16) (1, 17)
|
|
NAME 'x' (2, 0) (2, 1)
|
|
OP '=' (2, 2) (2, 3)
|
|
NAME 'sys' (2, 4) (2, 7)
|
|
OP '.' (2, 7) (2, 8)
|
|
NAME 'modules' (2, 8) (2, 15)
|
|
OP '[' (2, 15) (2, 16)
|
|
STRING "'time'" (2, 16) (2, 22)
|
|
OP ']' (2, 22) (2, 23)
|
|
OP '.' (2, 23) (2, 24)
|
|
NAME 'time' (2, 24) (2, 28)
|
|
OP '(' (2, 28) (2, 29)
|
|
OP ')' (2, 29) (2, 30)
|
|
""")
|
|
|
|
def test_method(self):
|
|
# Methods
|
|
self.check_tokenize("@staticmethod\n"
|
|
"def foo(x,y): pass", """\
|
|
OP '@' (1, 0) (1, 1)
|
|
NAME 'staticmethod (1, 1) (1, 13)
|
|
NEWLINE '\\n' (1, 13) (1, 14)
|
|
NAME 'def' (2, 0) (2, 3)
|
|
NAME 'foo' (2, 4) (2, 7)
|
|
OP '(' (2, 7) (2, 8)
|
|
NAME 'x' (2, 8) (2, 9)
|
|
OP ',' (2, 9) (2, 10)
|
|
NAME 'y' (2, 10) (2, 11)
|
|
OP ')' (2, 11) (2, 12)
|
|
OP ':' (2, 12) (2, 13)
|
|
NAME 'pass' (2, 14) (2, 18)
|
|
""")
|
|
|
|
def test_tabs(self):
|
|
# Evil tabs
|
|
self.check_tokenize("def f():\n"
|
|
"\tif x\n"
|
|
" \tpass", """\
|
|
NAME 'def' (1, 0) (1, 3)
|
|
NAME 'f' (1, 4) (1, 5)
|
|
OP '(' (1, 5) (1, 6)
|
|
OP ')' (1, 6) (1, 7)
|
|
OP ':' (1, 7) (1, 8)
|
|
NEWLINE '\\n' (1, 8) (1, 9)
|
|
INDENT '\\t' (2, 0) (2, 1)
|
|
NAME 'if' (2, 1) (2, 3)
|
|
NAME 'x' (2, 4) (2, 5)
|
|
NEWLINE '\\n' (2, 5) (2, 6)
|
|
INDENT ' \\t' (3, 0) (3, 9)
|
|
NAME 'pass' (3, 9) (3, 13)
|
|
DEDENT '' (4, 0) (4, 0)
|
|
DEDENT '' (4, 0) (4, 0)
|
|
""")
|
|
|
|
def test_pathological_trailing_whitespace(self):
|
|
# Pathological whitespace (http://bugs.python.org/issue16152)
|
|
self.check_tokenize("@ ", """\
|
|
OP '@' (1, 0) (1, 1)
|
|
""")
|
|
|
|
|
|
def decistmt(s):
|
|
result = []
|
|
g = generate_tokens(StringIO(s).readline) # tokenize the string
|
|
for toknum, tokval, _, _, _ in g:
|
|
if toknum == NUMBER and '.' in tokval: # replace NUMBER tokens
|
|
result.extend([
|
|
(NAME, 'Decimal'),
|
|
(OP, '('),
|
|
(STRING, repr(tokval)),
|
|
(OP, ')')
|
|
])
|
|
else:
|
|
result.append((toknum, tokval))
|
|
return untokenize(result)
|
|
|
|
class TestMisc(TestCase):
|
|
|
|
def test_decistmt(self):
|
|
# Substitute Decimals for floats in a string of statements.
|
|
# This is an example from the docs.
|
|
|
|
from decimal import Decimal
|
|
s = '+21.3e-5*-.1234/81.7'
|
|
self.assertEqual(decistmt(s),
|
|
"+Decimal ('21.3e-5')*-Decimal ('.1234')/Decimal ('81.7')")
|
|
|
|
# The format of the exponent is inherited from the platform C library.
|
|
# Known cases are "e-007" (Windows) and "e-07" (not Windows). Since
|
|
# we're only showing 12 digits, and the 13th isn't close to 5, the
|
|
# rest of the output should be platform-independent.
|
|
self.assertRegexpMatches(str(eval(s)), '-3.21716034272e-0+7')
|
|
|
|
# Output from calculations with Decimal should be identical across all
|
|
# platforms.
|
|
self.assertEqual(eval(decistmt(s)), Decimal('-3.217160342717258261933904529E-7'))
|
|
|
|
|
|
class UntokenizeTest(TestCase):
|
|
|
|
def test_bad_input_order(self):
|
|
# raise if previous row
|
|
u = Untokenizer()
|
|
u.prev_row = 2
|
|
u.prev_col = 2
|
|
with self.assertRaises(ValueError) as cm:
|
|
u.add_whitespace((1,3))
|
|
self.assertEqual(cm.exception.args[0],
|
|
'start (1,3) precedes previous end (2,2)')
|
|
# raise if previous column in row
|
|
self.assertRaises(ValueError, u.add_whitespace, (2,1))
|
|
|
|
def test_backslash_continuation(self):
|
|
# The problem is that <whitespace>\<newline> leaves no token
|
|
u = Untokenizer()
|
|
u.prev_row = 1
|
|
u.prev_col = 1
|
|
u.tokens = []
|
|
u.add_whitespace((2, 0))
|
|
self.assertEqual(u.tokens, ['\\\n'])
|
|
u.prev_row = 2
|
|
u.add_whitespace((4, 4))
|
|
self.assertEqual(u.tokens, ['\\\n', '\\\n\\\n', ' '])
|
|
|
|
def test_iter_compat(self):
|
|
u = Untokenizer()
|
|
token = (NAME, 'Hello')
|
|
u.compat(token, iter([]))
|
|
self.assertEqual(u.tokens, ["Hello "])
|
|
u = Untokenizer()
|
|
self.assertEqual(u.untokenize(iter([token])), 'Hello ')
|
|
|
|
|
|
class TestRoundtrip(TestCase):
|
|
|
|
def check_roundtrip(self, f):
|
|
"""
|
|
Test roundtrip for `untokenize`. `f` is an open file or a string.
|
|
The source code in f is tokenized, converted back to source code
|
|
via tokenize.untokenize(), and tokenized again from the latter.
|
|
The test fails if the second tokenization doesn't match the first.
|
|
"""
|
|
if isinstance(f, str): f = StringIO(f)
|
|
token_list = list(generate_tokens(f.readline))
|
|
f.close()
|
|
tokens1 = [tok[:2] for tok in token_list]
|
|
new_text = untokenize(tokens1)
|
|
readline = iter(new_text.splitlines(1)).next
|
|
tokens2 = [tok[:2] for tok in generate_tokens(readline)]
|
|
self.assertEqual(tokens2, tokens1)
|
|
|
|
def test_roundtrip(self):
|
|
# There are some standard formatting practices that are easy to get right.
|
|
|
|
self.check_roundtrip("if x == 1:\n"
|
|
" print(x)\n")
|
|
|
|
# There are some standard formatting practices that are easy to get right.
|
|
|
|
self.check_roundtrip("if x == 1:\n"
|
|
" print x\n")
|
|
self.check_roundtrip("# This is a comment\n"
|
|
"# This also")
|
|
|
|
# Some people use different formatting conventions, which makes
|
|
# untokenize a little trickier. Note that this test involves trailing
|
|
# whitespace after the colon. Note that we use hex escapes to make the
|
|
# two trailing blanks apperant in the expected output.
|
|
|
|
self.check_roundtrip("if x == 1 : \n"
|
|
" print x\n")
|
|
fn = test_support.findfile("tokenize_tests" + os.extsep + "txt")
|
|
with open(fn) as f:
|
|
self.check_roundtrip(f)
|
|
self.check_roundtrip("if x == 1:\n"
|
|
" # A comment by itself.\n"
|
|
" print x # Comment here, too.\n"
|
|
" # Another comment.\n"
|
|
"after_if = True\n")
|
|
self.check_roundtrip("if (x # The comments need to go in the right place\n"
|
|
" == 1):\n"
|
|
" print 'x==1'\n")
|
|
self.check_roundtrip("class Test: # A comment here\n"
|
|
" # A comment with weird indent\n"
|
|
" after_com = 5\n"
|
|
" def x(m): return m*5 # a one liner\n"
|
|
" def y(m): # A whitespace after the colon\n"
|
|
" return y*4 # 3-space indent\n")
|
|
|
|
# Some error-handling code
|
|
|
|
self.check_roundtrip("try: import somemodule\n"
|
|
"except ImportError: # comment\n"
|
|
" print 'Can not import' # comment2\n"
|
|
"else: print 'Loaded'\n")
|
|
|
|
def test_continuation(self):
|
|
# Balancing continuation
|
|
self.check_roundtrip("a = (3,4, \n"
|
|
"5,6)\n"
|
|
"y = [3, 4,\n"
|
|
"5]\n"
|
|
"z = {'a': 5,\n"
|
|
"'b':15, 'c':True}\n"
|
|
"x = len(y) + 5 - a[\n"
|
|
"3] - a[2]\n"
|
|
"+ len(z) - z[\n"
|
|
"'b']\n")
|
|
|
|
def test_backslash_continuation(self):
|
|
# Backslash means line continuation, except for comments
|
|
self.check_roundtrip("x=1+\\\n"
|
|
"1\n"
|
|
"# This is a comment\\\n"
|
|
"# This also\n")
|
|
self.check_roundtrip("# Comment \\\n"
|
|
"x = 0")
|
|
|
|
def test_string_concatenation(self):
|
|
# Two string literals on the same line
|
|
self.check_roundtrip("'' ''")
|
|
|
|
def test_random_files(self):
|
|
# Test roundtrip on random python modules.
|
|
# pass the '-ucpu' option to process the full directory.
|
|
|
|
import glob, random
|
|
fn = test_support.findfile("tokenize_tests" + os.extsep + "txt")
|
|
tempdir = os.path.dirname(fn) or os.curdir
|
|
testfiles = glob.glob(os.path.join(tempdir, "test*.py"))
|
|
|
|
if not test_support.is_resource_enabled("cpu"):
|
|
testfiles = random.sample(testfiles, 10)
|
|
|
|
for testfile in testfiles:
|
|
try:
|
|
with open(testfile, 'rb') as f:
|
|
self.check_roundtrip(f)
|
|
except:
|
|
print "Roundtrip failed for file %s" % testfile
|
|
raise
|
|
|
|
|
|
def roundtrip(self, code):
|
|
if isinstance(code, str):
|
|
code = code.encode('utf-8')
|
|
tokens = generate_tokens(StringIO(code).readline)
|
|
return untokenize(tokens).decode('utf-8')
|
|
|
|
def test_indentation_semantics_retained(self):
|
|
"""
|
|
Ensure that although whitespace might be mutated in a roundtrip,
|
|
the semantic meaning of the indentation remains consistent.
|
|
"""
|
|
code = "if False:\n\tx=3\n\tx=3\n"
|
|
codelines = self.roundtrip(code).split('\n')
|
|
self.assertEqual(codelines[1], codelines[2])
|
|
|
|
|
|
def test_main():
|
|
test_support.run_unittest(TokenizeTest)
|
|
test_support.run_unittest(UntokenizeTest)
|
|
test_support.run_unittest(TestRoundtrip)
|
|
test_support.run_unittest(TestMisc)
|
|
|
|
if __name__ == "__main__":
|
|
test_main()
|