| 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() |
