| from test import test_support | |
| from tokenize import (untokenize, generate_tokens, NUMBER, NAME, OP, NEWLINE, | |
| STRING, ENDMARKER, tok_name, Untokenizer, tokenize) | |
| from StringIO import StringIO | |
| import os | |
| from unittest import TestCase | |
| # Converts a source string into a list of textual representation | |
| # of the tokens such as: | |
| # ` NAME 'if' (1, 0) (1, 2)` | |
| # to make writing tests easier. | |
| def stringify_tokens_from_source(token_generator, source_string): | |
| result = [] | |
| num_lines = len(source_string.splitlines()) | |
| missing_trailing_nl = source_string[-1] not in '\r\n' | |
| for type, token, start, end, line in token_generator: | |
| if type == ENDMARKER: | |
| break | |
| # Ignore the new line on the last line if the input lacks one | |
| if missing_trailing_nl and type == NEWLINE and end[0] == num_lines: | |
| continue | |
| type = tok_name[type] | |
| result.append(" %(type)-10.10s %(token)-13.13r %(start)s %(end)s" % | |
| locals()) | |
| return result | |
| class TokenizeTest(TestCase): | |
| # Tests for the tokenize module. | |
| # The tests can be really simple. Given a small fragment of source | |
| # code, print out a table with tokens. The ENDMARKER, ENCODING and | |
| # final NEWLINE are omitted for brevity. | |
| def check_tokenize(self, s, expected): | |
| # Format the tokens in s in a table format. | |
| f = StringIO(s) | |
| result = stringify_tokens_from_source(generate_tokens(f.readline), s) | |
| self.assertEqual(result, | |
| expected.rstrip().splitlines()) | |
| def test_implicit_newline(self): | |
| # Make sure that the tokenizer puts in an implicit NEWLINE | |
| # when the input lacks a trailing new line. | |
| f = StringIO("x") | |
| tokens = list(generate_tokens(f.readline)) | |
| self.assertEqual(tokens[-2][0], NEWLINE) | |
| self.assertEqual(tokens[-1][0], ENDMARKER) | |
| def test_basic(self): | |
| self.check_tokenize("1 + 1", """\ | |
| NUMBER '1' (1, 0) (1, 1) | |
| OP '+' (1, 2) (1, 3) | |
| NUMBER '1' (1, 4) (1, 5) | |
| """) | |
| self.check_tokenize("if False:\n" | |
| " # NL\n" | |
| " True = False # NEWLINE\n", """\ | |
| NAME 'if' (1, 0) (1, 2) | |
| NAME 'False' (1, 3) (1, 8) | |
| OP ':' (1, 8) (1, 9) | |
| NEWLINE '\\n' (1, 9) (1, 10) | |
| COMMENT '# NL' (2, 4) (2, 8) | |
| NL '\\n' (2, 8) (2, 9) | |
| INDENT ' ' (3, 0) (3, 4) | |
| NAME 'True' (3, 4) (3, 8) | |
| OP '=' (3, 9) (3, 10) | |
| NAME 'False' (3, 11) (3, 16) | |
| COMMENT '# NEWLINE' (3, 17) (3, 26) | |
| NEWLINE '\\n' (3, 26) (3, 27) | |
| DEDENT '' (4, 0) (4, 0) | |
| """) | |
| indent_error_file = """\ | |
| def k(x): | |
| x += 2 | |
| x += 5 | |
| """ | |
| with self.assertRaisesRegexp(IndentationError, | |
| "unindent does not match any " | |
| "outer indentation level"): | |
| for tok in generate_tokens(StringIO(indent_error_file).readline): | |
| pass | |
| def test_int(self): | |
| # Ordinary integers and binary operators | |
| self.check_tokenize("0xff <= 255", """\ | |
| NUMBER '0xff' (1, 0) (1, 4) | |
| OP '<=' (1, 5) (1, 7) | |
| NUMBER '255' (1, 8) (1, 11) | |
| """) | |
| self.check_tokenize("0b10 <= 255", """\ | |
| NUMBER '0b10' (1, 0) (1, 4) | |
| OP '<=' (1, 5) (1, 7) | |
| NUMBER '255' (1, 8) (1, 11) | |
| """) | |
| self.check_tokenize("0o123 <= 0123", """\ | |
| NUMBER '0o123' (1, 0) (1, 5) | |
| OP '<=' (1, 6) (1, 8) | |
| NUMBER '0123' (1, 9) (1, 13) | |
| """) | |
| self.check_tokenize("01234567 > ~0x15", """\ | |
| NUMBER '01234567' (1, 0) (1, 8) | |
| OP '>' (1, 9) (1, 10) | |
| OP '~' (1, 11) (1, 12) | |
| NUMBER '0x15' (1, 12) (1, 16) | |
| """) | |
| self.check_tokenize("2134568 != 01231515", """\ | |
| NUMBER '2134568' (1, 0) (1, 7) | |
| OP '!=' (1, 8) (1, 10) | |
| NUMBER '01231515' (1, 11) (1, 19) | |
| """) | |
| self.check_tokenize("(-124561-1) & 0200000000", """\ | |
| OP '(' (1, 0) (1, 1) | |
| OP '-' (1, 1) (1, 2) | |
| NUMBER '124561' (1, 2) (1, 8) | |
| OP '-' (1, 8) (1, 9) | |
| NUMBER '1' (1, 9) (1, 10) | |
| OP ')' (1, 10) (1, 11) | |
| OP '&' (1, 12) (1, 13) | |
| NUMBER '0200000000' (1, 14) (1, 24) | |
| """) | |
| self.check_tokenize("0xdeadbeef != -1", """\ | |
| NUMBER '0xdeadbeef' (1, 0) (1, 10) | |
| OP '!=' (1, 11) (1, 13) | |
| OP '-' (1, 14) (1, 15) | |
| NUMBER '1' (1, 15) (1, 16) | |
| """) | |
| self.check_tokenize("0xdeadc0de & 012345", """\ | |
| NUMBER '0xdeadc0de' (1, 0) (1, 10) | |
| OP '&' (1, 11) (1, 12) | |
| NUMBER '012345' (1, 13) (1, 19) | |
| """) | |
| self.check_tokenize("0xFF & 0x15 | 1234", """\ | |
| NUMBER '0xFF' (1, 0) (1, 4) | |
| OP '&' (1, 5) (1, 6) | |
| NUMBER '0x15' (1, 7) (1, 11) | |
| OP '|' (1, 12) (1, 13) | |
| NUMBER '1234' (1, 14) (1, 18) | |
| """) | |
| def test_long(self): | |
| # Long integers | |
| self.check_tokenize("x = 0L", """\ | |
| NAME 'x' (1, 0) (1, 1) | |
| OP '=' (1, 2) (1, 3) | |
| NUMBER '0L' (1, 4) (1, 6) | |
| """) | |
| self.check_tokenize("x = 0xfffffffffff", """\ | |
| NAME 'x' (1, 0) (1, 1) | |
| OP '=' (1, 2) (1, 3) | |
| NUMBER '0xffffffffff (1, 4) (1, 17) | |
| """) | |
| self.check_tokenize("x = 123141242151251616110l", """\ | |
| NAME 'x' (1, 0) (1, 1) | |
| OP '=' (1, 2) (1, 3) | |
| NUMBER '123141242151 (1, 4) (1, 26) | |
| """) | |
| self.check_tokenize("x = -15921590215012591L", """\ | |
| NAME 'x' (1, 0) (1, 1) | |
| OP '=' (1, 2) (1, 3) | |
| OP '-' (1, 4) (1, 5) | |
| NUMBER '159215902150 (1, 5) (1, 23) | |
| """) | |
| def test_float(self): | |
| # Floating point numbers | |
| self.check_tokenize("x = 3.14159", """\ | |
| NAME 'x' (1, 0) (1, 1) | |
| OP '=' (1, 2) (1, 3) | |
| NUMBER '3.14159' (1, 4) (1, 11) | |
| """) | |
| self.check_tokenize("x = 314159.", """\ | |
| NAME 'x' (1, 0) (1, 1) | |
| OP '=' (1, 2) (1, 3) | |
| NUMBER '314159.' (1, 4) (1, 11) | |
| """) | |
| self.check_tokenize("x = .314159", """\ | |
| NAME 'x' (1, 0) (1, 1) | |
| OP '=' (1, 2) (1, 3) | |
| NUMBER '.314159' (1, 4) (1, 11) | |
| """) | |
| self.check_tokenize("x = 3e14159", """\ | |
| NAME 'x' (1, 0) (1, 1) | |
| OP '=' (1, 2) (1, 3) | |
| NUMBER '3e14159' (1, 4) (1, 11) | |
| """) | |
| self.check_tokenize("x = 3E123", """\ | |
| NAME 'x' (1, 0) (1, 1) | |
| OP '=' (1, 2) (1, 3) | |
| NUMBER '3E123' (1, 4) (1, 9) | |
| """) | |
| self.check_tokenize("x+y = 3e-1230", """\ | |
| NAME 'x' (1, 0) (1, 1) | |
| OP '+' (1, 1) (1, 2) | |
| NAME 'y' (1, 2) (1, 3) | |
| OP '=' (1, 4) (1, 5) | |
| NUMBER '3e-1230' (1, 6) (1, 13) | |
| """) | |
| self.check_tokenize("x = 3.14e159", """\ | |
| NAME 'x' (1, 0) (1, 1) | |
| OP '=' (1, 2) (1, 3) | |
| NUMBER '3.14e159' (1, 4) (1, 12) | |
| """) | |
| def test_string(self): | |
| # String literals | |
| self.check_tokenize("x = ''; y = \"\"", """\ | |
| NAME 'x' (1, 0) (1, 1) | |
| OP '=' (1, 2) (1, 3) | |
| STRING "''" (1, 4) (1, 6) | |
| OP ';' (1, 6) (1, 7) | |
| NAME 'y' (1, 8) (1, 9) | |
| OP '=' (1, 10) (1, 11) | |
| STRING '""' (1, 12) (1, 14) | |
| """) | |
| self.check_tokenize("x = '\"'; y = \"'\"", """\ | |
| NAME 'x' (1, 0) (1, 1) | |
| OP '=' (1, 2) (1, 3) | |
| STRING '\\'"\\'' (1, 4) (1, 7) | |
| OP ';' (1, 7) (1, 8) | |
| NAME 'y' (1, 9) (1, 10) | |
| OP '=' (1, 11) (1, 12) | |
| STRING '"\\'"' (1, 13) (1, 16) | |
| """) | |
| self.check_tokenize("x = \"doesn't \"shrink\", does it\"", """\ | |
| NAME 'x' (1, 0) (1, 1) | |
| OP '=' (1, 2) (1, 3) | |
| STRING '"doesn\\'t "' (1, 4) (1, 14) | |
| NAME 'shrink' (1, 14) (1, 20) | |
| STRING '", does it"' (1, 20) (1, 31) | |
| """) | |
| self.check_tokenize("x = u'abc' + U'ABC'", """\ | |
| NAME 'x' (1, 0) (1, 1) | |
| OP '=' (1, 2) (1, 3) | |
| STRING "u'abc'" (1, 4) (1, 10) | |
| OP '+' (1, 11) (1, 12) | |
| STRING "U'ABC'" (1, 13) (1, 19) | |
| """) | |
| self.check_tokenize('y = u"ABC" + U"ABC"', """\ | |
| NAME 'y' (1, 0) (1, 1) | |
| OP '=' (1, 2) (1, 3) | |
| STRING 'u"ABC"' (1, 4) (1, 10) | |
| OP '+' (1, 11) (1, 12) | |
| STRING 'U"ABC"' (1, 13) (1, 19) | |
| """) | |
| self.check_tokenize("x = ur'abc' + Ur'ABC' + uR'ABC' + UR'ABC'", """\ | |
| NAME 'x' (1, 0) (1, 1) | |
| OP '=' (1, 2) (1, 3) | |
| STRING "ur'abc'" (1, 4) (1, 11) | |
| OP '+' (1, 12) (1, 13) | |
| STRING "Ur'ABC'" (1, 14) (1, 21) | |
| OP '+' (1, 22) (1, 23) | |
| STRING "uR'ABC'" (1, 24) (1, 31) | |
| OP '+' (1, 32) (1, 33) | |
| STRING "UR'ABC'" (1, 34) (1, 41) | |
| """) | |
| self.check_tokenize('y = ur"abc" + Ur"ABC" + uR"ABC" + UR"ABC"', """\ | |
| NAME 'y' (1, 0) (1, 1) | |
| OP '=' (1, 2) (1, 3) | |
| STRING 'ur"abc"' (1, 4) (1, 11) | |
| OP '+' (1, 12) (1, 13) | |
| STRING 'Ur"ABC"' (1, 14) (1, 21) | |
| OP '+' (1, 22) (1, 23) | |
| STRING 'uR"ABC"' (1, 24) (1, 31) | |
| OP '+' (1, 32) (1, 33) | |
| STRING 'UR"ABC"' (1, 34) (1, 41) | |
| """) | |
| self.check_tokenize("b'abc' + B'abc'", """\ | |
| STRING "b'abc'" (1, 0) (1, 6) | |
| OP '+' (1, 7) (1, 8) | |
| STRING "B'abc'" (1, 9) (1, 15) | |
| """) | |
| self.check_tokenize('b"abc" + B"abc"', """\ | |
| STRING 'b"abc"' (1, 0) (1, 6) | |
| OP '+' (1, 7) (1, 8) | |
| STRING 'B"abc"' (1, 9) (1, 15) | |
| """) | |
| self.check_tokenize("br'abc' + bR'abc' + Br'abc' + BR'abc'", """\ | |
| STRING "br'abc'" (1, 0) (1, 7) | |
| OP '+' (1, 8) (1, 9) | |
| STRING "bR'abc'" (1, 10) (1, 17) | |
| OP '+' (1, 18) (1, 19) | |
| STRING "Br'abc'" (1, 20) (1, 27) | |
| OP '+' (1, 28) (1, 29) | |
| STRING "BR'abc'" (1, 30) (1, 37) | |
| """) | |
| self.check_tokenize('br"abc" + bR"abc" + Br"abc" + BR"abc"', """\ | |
| STRING 'br"abc"' (1, 0) (1, 7) | |
| OP '+' (1, 8) (1, 9) | |
| STRING 'bR"abc"' (1, 10) (1, 17) | |
| OP '+' (1, 18) (1, 19) | |
| STRING 'Br"abc"' (1, 20) (1, 27) | |
| OP '+' (1, 28) (1, 29) | |
| STRING 'BR"abc"' (1, 30) (1, 37) | |
| """) | |
| def test_function(self): | |
| self.check_tokenize("def d22(a, b, c=2, d=2, *k): pass", """\ | |
| NAME 'def' (1, 0) (1, 3) | |
| NAME 'd22' (1, 4) (1, 7) | |
| OP '(' (1, 7) (1, 8) | |
| NAME 'a' (1, 8) (1, 9) | |
| OP ',' (1, 9) (1, 10) | |
| NAME 'b' (1, 11) (1, 12) | |
| OP ',' (1, 12) (1, 13) | |
| NAME 'c' (1, 14) (1, 15) | |
| OP '=' (1, 15) (1, 16) | |
| NUMBER '2' (1, 16) (1, 17) | |
| OP ',' (1, 17) (1, 18) | |
| NAME 'd' (1, 19) (1, 20) | |
| OP '=' (1, 20) (1, 21) | |
| NUMBER '2' (1, 21) (1, 22) | |
| OP ',' (1, 22) (1, 23) | |
| OP '*' (1, 24) (1, 25) | |
| NAME 'k' (1, 25) (1, 26) | |
| OP ')' (1, 26) (1, 27) | |
| OP ':' (1, 27) (1, 28) | |
| NAME 'pass' (1, 29) (1, 33) | |
| """) | |
| self.check_tokenize("def d01v_(a=1, *k, **w): pass", """\ | |
| NAME 'def' (1, 0) (1, 3) | |
| NAME 'd01v_' (1, 4) (1, 9) | |
| OP '(' (1, 9) (1, 10) | |
| NAME 'a' (1, 10) (1, 11) | |
| OP '=' (1, 11) (1, 12) | |
| NUMBER '1' (1, 12) (1, 13) | |
| OP ',' (1, 13) (1, 14) | |
| OP '*' (1, 15) (1, 16) | |
| NAME 'k' (1, 16) (1, 17) | |
| OP ',' (1, 17) (1, 18) | |
| OP '**' (1, 19) (1, 21) | |
| NAME 'w' (1, 21) (1, 22) | |
| OP ')' (1, 22) (1, 23) | |
| OP ':' (1, 23) (1, 24) | |
| NAME 'pass' (1, 25) (1, 29) | |
| """) | |
| def test_comparison(self): | |
| # Comparison | |
| self.check_tokenize("if 1 < 1 > 1 == 1 >= 5 <= 0x15 <= 0x12 != " + | |
| "1 and 5 in 1 not in 1 is 1 or 5 is not 1: pass", """\ | |
| NAME 'if' (1, 0) (1, 2) | |
| NUMBER '1' (1, 3) (1, 4) | |
| OP '<' (1, 5) (1, 6) | |
| NUMBER '1' (1, 7) (1, 8) | |
| OP '>' (1, 9) (1, 10) | |
| NUMBER '1' (1, 11) (1, 12) | |
| OP '==' (1, 13) (1, 15) | |
| NUMBER '1' (1, 16) (1, 17) | |
| OP '>=' (1, 18) (1, 20) | |
| NUMBER '5' (1, 21) (1, 22) | |
| OP '<=' (1, 23) (1, 25) | |
| NUMBER '0x15' (1, 26) (1, 30) | |
| OP '<=' (1, 31) (1, 33) | |
| NUMBER '0x12' (1, 34) (1, 38) | |
| OP '!=' (1, 39) (1, 41) | |
| NUMBER '1' (1, 42) (1, 43) | |
| NAME 'and' (1, 44) (1, 47) | |
| NUMBER '5' (1, 48) (1, 49) | |
| NAME 'in' (1, 50) (1, 52) | |
| NUMBER '1' (1, 53) (1, 54) | |
| NAME 'not' (1, 55) (1, 58) | |
| NAME 'in' (1, 59) (1, 61) | |
| NUMBER '1' (1, 62) (1, 63) | |
| NAME 'is' (1, 64) (1, 66) | |
| NUMBER '1' (1, 67) (1, 68) | |
| NAME 'or' (1, 69) (1, 71) | |
| NUMBER '5' (1, 72) (1, 73) | |
| NAME 'is' (1, 74) (1, 76) | |
| NAME 'not' (1, 77) (1, 80) | |
| NUMBER '1' (1, 81) (1, 82) | |
| OP ':' (1, 82) (1, 83) | |
| NAME 'pass' (1, 84) (1, 88) | |
| """) | |
| def test_shift(self): | |
| # Shift | |
| self.check_tokenize("x = 1 << 1 >> 5", """\ | |
| NAME 'x' (1, 0) (1, 1) | |
| OP '=' (1, 2) (1, 3) | |
| NUMBER '1' (1, 4) (1, 5) | |
| OP '<<' (1, 6) (1, 8) | |
| NUMBER '1' (1, 9) (1, 10) | |
| OP '>>' (1, 11) (1, 13) | |
| NUMBER '5' (1, 14) (1, 15) | |
| """) | |
| def test_additive(self): | |
| # Additive | |
| self.check_tokenize("x = 1 - y + 15 - 01 + 0x124 + z + a[5]", """\ | |
| NAME 'x' (1, 0) (1, 1) | |
| OP '=' (1, 2) (1, 3) | |
| NUMBER '1' (1, 4) (1, 5) | |
| OP '-' (1, 6) (1, 7) | |
| NAME 'y' (1, 8) (1, 9) | |
| OP '+' (1, 10) (1, 11) | |
| NUMBER '15' (1, 12) (1, 14) | |
| OP '-' (1, 15) (1, 16) | |
| NUMBER '01' (1, 17) (1, 19) | |
| OP '+' (1, 20) (1, 21) | |
| NUMBER '0x124' (1, 22) (1, 27) | |
| OP '+' (1, 28) (1, 29) | |
| NAME 'z' (1, 30) (1, 31) | |
| OP '+' (1, 32) (1, 33) | |
| NAME 'a' (1, 34) (1, 35) | |
| OP '[' (1, 35) (1, 36) | |
| NUMBER '5' (1, 36) (1, 37) | |
| OP ']' (1, 37) (1, 38) | |
| """) | |
| def test_multiplicative(self): | |
| # Multiplicative | |
| self.check_tokenize("x = 1//1*1/5*12%0x12", """\ | |
| NAME 'x' (1, 0) (1, 1) | |
| OP '=' (1, 2) (1, 3) | |
| NUMBER '1' (1, 4) (1, 5) | |
| OP '//' (1, 5) (1, 7) | |
| NUMBER '1' (1, 7) (1, 8) | |
| OP '*' (1, 8) (1, 9) | |
| NUMBER '1' (1, 9) (1, 10) | |
| OP '/' (1, 10) (1, 11) | |
| NUMBER '5' (1, 11) (1, 12) | |
| 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\n") | |
| # 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() |