-
-
Notifications
You must be signed in to change notification settings - Fork 138
/
Copy pathtest_lexer.py
644 lines (596 loc) · 24.6 KB
/
test_lexer.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
from __future__ import annotations
from typing import Optional, Tuple
import pytest
from graphql.error import GraphQLSyntaxError
from graphql.language import Lexer, Source, SourceLocation, Token, TokenKind
from graphql.language.lexer import is_punctuator_token_kind
from graphql.pyutils import inspect
from ..utils import dedent
try:
from typing import TypeAlias
except ImportError: # Python < 3.10
from typing_extensions import TypeAlias
Location: TypeAlias = Optional[Tuple[int, int]]
def lex_one(s: str) -> Token:
lexer = Lexer(Source(s))
return lexer.advance()
def lex_second(s: str) -> Token:
lexer = Lexer(Source(s))
lexer.advance()
return lexer.advance()
def assert_syntax_error(text: str, message: str, location: Location) -> None:
with pytest.raises(GraphQLSyntaxError) as exc_info:
lex_second(text)
error = exc_info.value
assert error.message == f"Syntax Error: {message}"
assert error.description == message
assert error.locations == [location]
def describe_lexer():
def ignores_bom_header():
token = lex_one("\ufeff foo")
assert token == Token(TokenKind.NAME, 2, 5, 1, 3, "foo")
def tracks_line_breaks():
assert lex_one("foo") == Token(TokenKind.NAME, 0, 3, 1, 1, "foo")
assert lex_one("\nfoo") == Token(TokenKind.NAME, 1, 4, 2, 1, "foo")
assert lex_one("\rfoo") == Token(TokenKind.NAME, 1, 4, 2, 1, "foo")
assert lex_one("\r\nfoo") == Token(TokenKind.NAME, 2, 5, 2, 1, "foo")
assert lex_one("\n\rfoo") == Token(TokenKind.NAME, 2, 5, 3, 1, "foo")
assert lex_one("\r\r\n\nfoo") == Token(TokenKind.NAME, 4, 7, 4, 1, "foo")
assert lex_one("\n\n\r\rfoo") == Token(TokenKind.NAME, 4, 7, 5, 1, "foo")
def records_line_and_column():
token = lex_one("\n \r\n \r foo\n")
assert token == Token(TokenKind.NAME, 8, 11, 4, 3, "foo")
def can_be_stringified_or_pyutils_inspected():
token = lex_one("foo")
assert token.desc == "Name 'foo'"
assert str(token) == token.desc
assert repr(token) == "<Token Name 'foo' 1:1>"
assert inspect(token) == repr(token)
def skips_whitespace_and_comments():
token = lex_one("\n\n foo\n\n\n")
assert token == Token(TokenKind.NAME, 6, 9, 3, 5, "foo")
token = lex_one("\r\n\r\n foo\r\n\r\n")
assert token == Token(TokenKind.NAME, 6, 9, 3, 3, "foo")
token = lex_one("\r\r foo\r\r")
assert token == Token(TokenKind.NAME, 4, 7, 3, 3, "foo")
token = lex_one("\t\tfoo\t\t")
assert token == Token(TokenKind.NAME, 2, 5, 1, 3, "foo")
token = lex_one("\n #comment\n foo#comment\n")
assert token == Token(TokenKind.NAME, 18, 21, 3, 5, "foo")
token = lex_one(",,,foo,,,")
assert token == Token(TokenKind.NAME, 3, 6, 1, 4, "foo")
def errors_respect_whitespace():
with pytest.raises(GraphQLSyntaxError) as exc_info:
lex_one("\n\n ~\n")
assert str(exc_info.value) == dedent(
"""
Syntax Error: Unexpected character: '~'.
GraphQL request:3:2
2 |
3 | ~
| ^
4 |
"""
)
def updates_line_numbers_in_error_for_file_context():
s = "\n\n ~\n\n"
source = Source(s, "foo.js", SourceLocation(11, 12))
with pytest.raises(GraphQLSyntaxError) as exc_info:
Lexer(source).advance()
assert str(exc_info.value) == dedent(
"""
Syntax Error: Unexpected character: '~'.
foo.js:13:6
12 |
13 | ~
| ^
14 |
"""
)
def updates_column_numbers_in_error_for_file_context():
source = Source("~", "foo.js", SourceLocation(1, 5))
with pytest.raises(GraphQLSyntaxError) as exc_info:
Lexer(source).advance()
assert str(exc_info.value) == dedent(
"""
Syntax Error: Unexpected character: '~'.
foo.js:1:5
1 | ~
| ^
"""
)
# noinspection PyArgumentEqualDefault
def lexes_empty_string():
token = lex_one('""')
assert token == Token(TokenKind.STRING, 0, 2, 1, 1, "")
assert token.value == ""
# noinspection PyArgumentEqualDefault
def lexes_strings():
assert lex_one('""') == Token(TokenKind.STRING, 0, 2, 1, 1, "")
assert lex_one('"simple"') == Token(TokenKind.STRING, 0, 8, 1, 1, "simple")
assert lex_one('" white space "') == Token(
TokenKind.STRING, 0, 15, 1, 1, " white space "
)
assert lex_one('"quote \\""') == Token(TokenKind.STRING, 0, 10, 1, 1, 'quote "')
assert lex_one('"escaped \\n\\r\\b\\t\\f"') == Token(
TokenKind.STRING, 0, 20, 1, 1, "escaped \n\r\b\t\f"
)
assert lex_one('"slashes \\\\ \\/"') == Token(
TokenKind.STRING, 0, 15, 1, 1, "slashes \\ /"
)
assert lex_one('"unescaped surrogate pair \ud83d\ude00"') == Token(
TokenKind.STRING, 0, 29, 1, 1, "unescaped surrogate pair \ud83d\ude00"
)
assert lex_one('"unescaped unicode outside BMP \U0001f600"') == Token(
TokenKind.STRING, 0, 33, 1, 1, "unescaped unicode outside BMP \U0001f600"
)
assert lex_one('"unescaped maximal unicode outside BMP \U0010ffff"') == Token(
TokenKind.STRING,
0,
41,
1,
1,
"unescaped maximal unicode outside BMP \U0010ffff",
)
assert lex_one('"unicode \\u1234\\u5678\\u90AB\\uCDEF"') == Token(
TokenKind.STRING, 0, 34, 1, 1, "unicode \u1234\u5678\u90ab\ucdef"
)
assert lex_one('"unicode \\u{1234}\\u{5678}\\u{90AB}\\u{CDEF}"') == Token(
TokenKind.STRING, 0, 42, 1, 1, "unicode \u1234\u5678\u90ab\ucdef"
)
assert lex_one('"string with unicode escape outside BMP \\u{1F600}"') == Token(
TokenKind.STRING,
0,
50,
1,
1,
"string with unicode escape outside BMP \U0001f600",
)
assert lex_one('"string with minimal unicode escape \\u{0}"') == Token(
TokenKind.STRING, 0, 42, 1, 1, "string with minimal unicode escape \u0000"
)
assert lex_one('"string with maximal unicode escape \\u{10FFFF}"') == Token(
TokenKind.STRING,
0,
47,
1,
1,
"string with maximal unicode escape \U0010ffff",
)
assert lex_one(
'"string with maximal minimal unicode escape \\u{00000000}"'
) == Token(
TokenKind.STRING,
0,
57,
1,
1,
"string with maximal minimal unicode escape \u0000",
)
assert lex_one(
'"string with unicode surrogate pair escape \\uD83D\\uDE00"'
) == Token(
TokenKind.STRING,
0,
56,
1,
1,
"string with unicode surrogate pair escape \U0001f600",
)
assert lex_one(
'"string with unicode surrogate pair escape \\uD800\\uDC00"'
) == Token(
TokenKind.STRING,
0,
56,
1,
1,
"string with unicode surrogate pair escape \U00010000",
)
assert lex_one(
'"string with unicode surrogate pair escape \\uDBFF\\uDFFF"'
) == Token(
TokenKind.STRING,
0,
56,
1,
1,
"string with unicode surrogate pair escape \U0010ffff",
)
def lex_reports_useful_string_errors():
assert_syntax_error('"', "Unterminated string.", (1, 2))
assert_syntax_error('"""', "Unterminated string.", (1, 4))
assert_syntax_error('""""', "Unterminated string.", (1, 5))
assert_syntax_error('"no end quote', "Unterminated string.", (1, 14))
assert_syntax_error(
"'single quotes'",
"Unexpected single quote character ('), "
'did you mean to use a double quote (")?',
(1, 1),
)
assert_syntax_error(
'"bad surrogate \udead"',
"Invalid character within String: U+DEAD.",
(1, 16),
)
assert_syntax_error(
'"bad high surrogate pair \udead\udead"',
"Invalid character within String: U+DEAD.",
(1, 26),
)
assert_syntax_error(
'"bad low surrogate pair \ud800\ud800"',
"Invalid character within String: U+D800.",
(1, 25),
)
assert_syntax_error('"multi\nline"', "Unterminated string.", (1, 7))
assert_syntax_error('"multi\rline"', "Unterminated string.", (1, 7))
assert_syntax_error(
'"bad \\z esc"', "Invalid character escape sequence: '\\z'.", (1, 6)
)
assert_syntax_error(
'"bad \\x esc"', "Invalid character escape sequence: '\\x'.", (1, 6)
)
assert_syntax_error(
'"bad \\u1 esc"', "Invalid Unicode escape sequence: '\\u1 es'.", (1, 6)
)
assert_syntax_error(
'"bad \\u0XX1 esc"', "Invalid Unicode escape sequence: '\\u0XX1'.", (1, 6)
)
assert_syntax_error(
'"bad \\uXXXX esc"', "Invalid Unicode escape sequence: '\\uXXXX'.", (1, 6)
)
assert_syntax_error(
'"bad \\uFXXX esc"', "Invalid Unicode escape sequence: '\\uFXXX'.", (1, 6)
)
assert_syntax_error(
'"bad \\uXXXF esc"', "Invalid Unicode escape sequence: '\\uXXXF'.", (1, 6)
)
assert_syntax_error(
'"bad \\u{} esc"', "Invalid Unicode escape sequence: '\\u{}'.", (1, 6)
)
assert_syntax_error(
'"bad \\u{FXXX} esc"', "Invalid Unicode escape sequence: '\\u{FX'.", (1, 6)
)
assert_syntax_error(
'"bad \\u{FFFF esc"',
"Invalid Unicode escape sequence: '\\u{FFFF '.",
(1, 6),
)
assert_syntax_error(
'"bad \\u{FFFF"', "Invalid Unicode escape sequence: '\\u{FFFF\"'.", (1, 6)
)
assert_syntax_error(
'"too high \\u{110000} esc"',
"Invalid Unicode escape sequence: '\\u{110000}'.",
(1, 11),
)
assert_syntax_error(
'"way too high \\u{12345678} esc"',
"Invalid Unicode escape sequence: '\\u{12345678}'.",
(1, 15),
)
assert_syntax_error(
'"too long \\u{000000000} esc"',
"Invalid Unicode escape sequence: '\\u{000000000'.",
(1, 11),
)
assert_syntax_error(
'"bad surrogate \\uDEAD esc"',
"Invalid Unicode escape sequence: '\\uDEAD'.",
(1, 16),
)
assert_syntax_error(
'"bad surrogate \\u{DEAD} esc"',
"Invalid Unicode escape sequence: '\\u{DEAD}'.",
(1, 16),
)
assert_syntax_error(
'"cannot use braces for surrogate pair \\u{D83D}\\u{DE00} esc"',
"Invalid Unicode escape sequence: '\\u{D83D}'.",
(1, 39),
)
assert_syntax_error(
'"bad high surrogate pair \\uDEAD\\uDEAD esc"',
"Invalid Unicode escape sequence: '\\uDEAD'.",
(1, 26),
)
assert_syntax_error(
'"bad low surrogate pair \\uD800\\uD800 esc"',
"Invalid Unicode escape sequence: '\\uD800'.",
(1, 25),
)
assert_syntax_error(
'"cannot escape half a pair \ud83d\\uDE00 esc"',
"Invalid character within String: U+D83D.",
(1, 28),
)
assert_syntax_error(
'"cannot escape half a pair \\uD83D\ude00 esc"',
"Invalid Unicode escape sequence: '\\uD83D'.",
(1, 28),
)
assert_syntax_error(
'"bad \\uD83D\\not an escape"',
"Invalid Unicode escape sequence: '\\uD83D'.",
(1, 6),
)
# noinspection PyArgumentEqualDefault
def lexes_block_strings():
assert lex_one('""""""') == Token(TokenKind.BLOCK_STRING, 0, 6, 1, 1, "")
assert lex_one('"""simple"""') == Token(
TokenKind.BLOCK_STRING, 0, 12, 1, 1, "simple"
)
assert lex_one('""" white space """') == Token(
TokenKind.BLOCK_STRING, 0, 19, 1, 1, " white space "
)
assert lex_one('"""contains " quote"""') == Token(
TokenKind.BLOCK_STRING, 0, 22, 1, 1, 'contains " quote'
)
assert lex_one('"""contains \\""" triple-quote"""') == Token(
TokenKind.BLOCK_STRING, 0, 32, 1, 1, 'contains """ triple-quote'
)
assert lex_one('"""multi\nline"""') == Token(
TokenKind.BLOCK_STRING, 0, 16, 1, 1, "multi\nline"
)
assert lex_one('"""multi\rline\r\nnormalized"""') == Token(
TokenKind.BLOCK_STRING, 0, 28, 1, 1, "multi\nline\nnormalized"
)
assert lex_one('"""unescaped \\n\\r\\b\\t\\f\\u1234"""') == Token(
TokenKind.BLOCK_STRING,
0,
32,
1,
1,
"unescaped \\n\\r\\b\\t\\f\\u1234",
)
assert lex_one('"""unescaped surrogate pair \ud83d\ude00"""') == Token(
TokenKind.BLOCK_STRING,
0,
33,
1,
1,
"unescaped surrogate pair \ud83d\ude00",
)
assert lex_one('"""unescaped unicode outside BMP \U0001f600"""') == Token(
TokenKind.BLOCK_STRING,
0,
37,
1,
1,
"unescaped unicode outside BMP \U0001f600",
)
assert lex_one('"""slashes \\\\ \\/"""') == Token(
TokenKind.BLOCK_STRING, 0, 19, 1, 1, "slashes \\\\ \\/"
)
assert lex_one(
'"""\n\n spans\n multiple\n lines\n\n """'
) == Token(TokenKind.BLOCK_STRING, 0, 68, 1, 1, "spans\n multiple\n lines")
def advance_line_after_lexing_multiline_block_string():
assert lex_second(
'''"""
spans
multiple
lines
\n """ second_token'''
) == Token(TokenKind.NAME, 71, 83, 8, 6, "second_token")
def lex_reports_useful_block_string_errors():
assert_syntax_error('"""', "Unterminated string.", (1, 4))
assert_syntax_error('"""no end quote', "Unterminated string.", (1, 16))
assert_syntax_error(
'"""contains invalid surrogate \udead"""',
"Invalid character within String: U+DEAD.",
(1, 31),
)
# noinspection PyArgumentEqualDefault
def lexes_numbers():
assert lex_one("0") == Token(TokenKind.INT, 0, 1, 1, 1, "0")
assert lex_one("1") == Token(TokenKind.INT, 0, 1, 1, 1, "1")
assert lex_one("4") == Token(TokenKind.INT, 0, 1, 1, 1, "4")
assert lex_one("9") == Token(TokenKind.INT, 0, 1, 1, 1, "9")
assert lex_one("42") == Token(TokenKind.INT, 0, 2, 1, 1, "42")
assert lex_one("4.123") == Token(TokenKind.FLOAT, 0, 5, 1, 1, "4.123")
assert lex_one("-4") == Token(TokenKind.INT, 0, 2, 1, 1, "-4")
assert lex_one("-42") == Token(TokenKind.INT, 0, 3, 1, 1, "-42")
assert lex_one("-4.123") == Token(TokenKind.FLOAT, 0, 6, 1, 1, "-4.123")
assert lex_one("0.123") == Token(TokenKind.FLOAT, 0, 5, 1, 1, "0.123")
assert lex_one("123e4") == Token(TokenKind.FLOAT, 0, 5, 1, 1, "123e4")
assert lex_one("123E4") == Token(TokenKind.FLOAT, 0, 5, 1, 1, "123E4")
assert lex_one("123e-4") == Token(TokenKind.FLOAT, 0, 6, 1, 1, "123e-4")
assert lex_one("123e+4") == Token(TokenKind.FLOAT, 0, 6, 1, 1, "123e+4")
assert lex_one("-1.123e4") == Token(TokenKind.FLOAT, 0, 8, 1, 1, "-1.123e4")
assert lex_one("-1.123E4") == Token(TokenKind.FLOAT, 0, 8, 1, 1, "-1.123E4")
assert lex_one("-1.123e-4") == Token(TokenKind.FLOAT, 0, 9, 1, 1, "-1.123e-4")
assert lex_one("-1.123e+4") == Token(TokenKind.FLOAT, 0, 9, 1, 1, "-1.123e+4")
assert lex_one("-1.123e4567") == Token(
TokenKind.FLOAT, 0, 11, 1, 1, "-1.123e4567"
)
def lex_reports_useful_number_errors():
assert_syntax_error(
"00", "Invalid number, unexpected digit after 0: '0'.", (1, 2)
)
assert_syntax_error(
"01", "Invalid number, unexpected digit after 0: '1'.", (1, 2)
)
assert_syntax_error(
"01.23", "Invalid number, unexpected digit after 0: '1'.", (1, 2)
)
assert_syntax_error("+1", "Unexpected character: '+'.", (1, 1))
assert_syntax_error(
"1.", "Invalid number, expected digit but got: <EOF>.", (1, 3)
)
assert_syntax_error(
"1e", "Invalid number, expected digit but got: <EOF>.", (1, 3)
)
assert_syntax_error(
"1E", "Invalid number, expected digit but got: <EOF>.", (1, 3)
)
assert_syntax_error(
"1.e1", "Invalid number, expected digit but got: 'e'.", (1, 3)
)
assert_syntax_error(".123", "Unexpected character: '.'.", (1, 1))
assert_syntax_error(
"1.A", "Invalid number, expected digit but got: 'A'.", (1, 3)
)
assert_syntax_error(
"-A", "Invalid number, expected digit but got: 'A'.", (1, 2)
)
assert_syntax_error(
"1.0e", "Invalid number, expected digit but got: <EOF>.", (1, 5)
)
assert_syntax_error(
"1.0eA", "Invalid number, expected digit but got: 'A'.", (1, 5)
)
assert_syntax_error(
'1.0e"', "Invalid number, expected digit but got: '\"'.", (1, 5)
)
assert_syntax_error(
"1.2e3e", "Invalid number, expected digit but got: 'e'.", (1, 6)
)
assert_syntax_error(
"1.2e3.4", "Invalid number, expected digit but got: '.'.", (1, 6)
)
assert_syntax_error(
"1.23.4", "Invalid number, expected digit but got: '.'.", (1, 5)
)
def lex_does_not_allow_name_start_after_a_number():
assert_syntax_error(
"0xF1", "Invalid number, expected digit but got: 'x'.", (1, 2)
)
assert_syntax_error(
"0b10", "Invalid number, expected digit but got: 'b'.", (1, 2)
)
assert_syntax_error(
"123abc", "Invalid number, expected digit but got: 'a'.", (1, 4)
)
assert_syntax_error(
"1_234", "Invalid number, expected digit but got: '_'.", (1, 2)
)
assert_syntax_error("1\xdf", "Unexpected character: U+00DF.", (1, 2))
assert_syntax_error(
"1.23f", "Invalid number, expected digit but got: 'f'.", (1, 5)
)
assert_syntax_error(
"1.234_5", "Invalid number, expected digit but got: '_'.", (1, 6)
)
# noinspection PyArgumentEqualDefault
def lexes_punctuation():
assert lex_one("!") == Token(TokenKind.BANG, 0, 1, 1, 1, None)
assert lex_one("?") == Token(TokenKind.QUESTION_MARK, 0, 1, 1, 1, None)
assert lex_one("$") == Token(TokenKind.DOLLAR, 0, 1, 1, 1, None)
assert lex_one("(") == Token(TokenKind.PAREN_L, 0, 1, 1, 1, None)
assert lex_one(")") == Token(TokenKind.PAREN_R, 0, 1, 1, 1, None)
assert lex_one("...") == Token(TokenKind.SPREAD, 0, 3, 1, 1, None)
assert lex_one(":") == Token(TokenKind.COLON, 0, 1, 1, 1, None)
assert lex_one("=") == Token(TokenKind.EQUALS, 0, 1, 1, 1, None)
assert lex_one("@") == Token(TokenKind.AT, 0, 1, 1, 1, None)
assert lex_one("[") == Token(TokenKind.BRACKET_L, 0, 1, 1, 1, None)
assert lex_one("]") == Token(TokenKind.BRACKET_R, 0, 1, 1, 1, None)
assert lex_one("{") == Token(TokenKind.BRACE_L, 0, 1, 1, 1, None)
assert lex_one("}") == Token(TokenKind.BRACE_R, 0, 1, 1, 1, None)
assert lex_one("|") == Token(TokenKind.PIPE, 0, 1, 1, 1, None)
def lex_reports_useful_unknown_character_error():
assert_syntax_error("..", "Unexpected character: '.'.", (1, 1))
assert_syntax_error("~", "Unexpected character: '~'.", (1, 1))
assert_syntax_error("\x00", "Unexpected character: U+0000.", (1, 1))
assert_syntax_error("\b", "Unexpected character: U+0008.", (1, 1))
assert_syntax_error("\xaa", "Unexpected character: U+00AA.", (1, 1))
assert_syntax_error("\u0aaa", "Unexpected character: U+0AAA.", (1, 1))
assert_syntax_error("\u203b", "Unexpected character: U+203B.", (1, 1))
assert_syntax_error("\U0001f600", "Unexpected character: U+1F600.", (1, 1))
assert_syntax_error("\ud83d\ude00", "Unexpected character: U+1F600.", (1, 1))
assert_syntax_error("\ud800\udc00", "Unexpected character: U+10000.", (1, 1))
assert_syntax_error("\udbff\udfff", "Unexpected character: U+10FFFF.", (1, 1))
assert_syntax_error("\ud800", "Invalid character: U+D800.", (1, 1))
assert_syntax_error("\udbff", "Invalid character: U+DBFF.", (1, 1))
assert_syntax_error("\udead", "Invalid character: U+DEAD.", (1, 1))
# noinspection PyArgumentEqualDefault
def lex_reports_useful_information_for_dashes_in_names():
source = Source("a-b")
lexer = Lexer(source)
first_token = lexer.advance()
assert first_token == Token(TokenKind.NAME, 0, 1, 1, 1, "a")
with pytest.raises(GraphQLSyntaxError) as exc_info:
lexer.advance()
error = exc_info.value
assert error.message == (
"Syntax Error: Invalid number, expected digit but got: 'b'."
)
assert error.locations == [(1, 3)]
def produces_double_linked_list_of_tokens_including_comments():
source = Source(
"""
{
#comment
field
}
"""
)
lexer = Lexer(source)
start_token = lexer.token
while True:
end_token = lexer.advance()
if end_token.kind == TokenKind.EOF:
break
assert end_token.kind != TokenKind.COMMENT
assert start_token.prev is None
assert end_token.next is None
tokens: list[Token] = []
tok: Token | None = start_token
while tok:
assert not tokens or tok.prev == tokens[-1]
tokens.append(tok)
tok = tok.next
assert [tok.kind for tok in tokens] == [
TokenKind.SOF,
TokenKind.BRACE_L,
TokenKind.COMMENT,
TokenKind.NAME,
TokenKind.BRACE_R,
TokenKind.EOF,
]
def lexes_comments():
assert lex_one("# Comment").prev == Token(
TokenKind.COMMENT, 0, 9, 1, 1, " Comment"
)
assert lex_one("# Comment\nAnother line").prev == Token(
TokenKind.COMMENT, 0, 9, 1, 1, " Comment"
)
assert lex_one("# Comment\r\nAnother line").prev == Token(
TokenKind.COMMENT, 0, 9, 1, 1, " Comment"
)
assert lex_one("# Comment \U0001f600").prev == Token(
TokenKind.COMMENT, 0, 11, 1, 1, " Comment \U0001f600"
)
assert lex_one("# Comment \ud83d\ude00").prev == Token(
TokenKind.COMMENT, 0, 12, 1, 1, " Comment \ud83d\ude00"
)
assert_syntax_error(
"# Invalid surrogate \udead", "Invalid character: U+DEAD.", (1, 21)
)
def describe_is_punctuator_token_kind():
def _is_punctuator_token(text: str) -> bool:
return is_punctuator_token_kind(lex_one(text).kind)
def returns_true_for_punctuator_tokens():
assert _is_punctuator_token("!") is True
assert _is_punctuator_token("?") is True
assert _is_punctuator_token("$") is True
assert _is_punctuator_token("&") is True
assert _is_punctuator_token("(") is True
assert _is_punctuator_token(")") is True
assert _is_punctuator_token("...") is True
assert _is_punctuator_token(":") is True
assert _is_punctuator_token("=") is True
assert _is_punctuator_token("@") is True
assert _is_punctuator_token("[") is True
assert _is_punctuator_token("]") is True
assert _is_punctuator_token("{") is True
assert _is_punctuator_token("|") is True
assert _is_punctuator_token("}") is True
def returns_false_for_non_punctuator_tokens():
assert _is_punctuator_token("") is False
assert _is_punctuator_token("name") is False
assert _is_punctuator_token("1") is False
assert _is_punctuator_token("3.14") is False
assert _is_punctuator_token('"str"') is False
assert _is_punctuator_token('"""str"""') is False