File: TestNumberFormatter.swift

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (1206 lines) | stat: -rw-r--r-- 58,823 bytes parent folder | download 
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
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
 
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//


class TestNumberFormatter: XCTestCase {

    let currencySpacing = "\u{00A0}"


    func test_defaultPropertyValues() {
        let numberFormatter = NumberFormatter()
        XCTAssertEqual(numberFormatter.numberStyle, .none)
        XCTAssertEqual(numberFormatter.generatesDecimalNumbers, false)
        XCTAssertEqual(numberFormatter.localizesFormat, true)
        XCTAssertEqual(numberFormatter.locale, Locale.current)
        XCTAssertEqual(numberFormatter.minimumIntegerDigits, 1)
        XCTAssertEqual(numberFormatter.maximumIntegerDigits, 42)
        XCTAssertEqual(numberFormatter.minimumFractionDigits, 0)
        XCTAssertEqual(numberFormatter.maximumFractionDigits, 0)
        XCTAssertEqual(numberFormatter.minimumSignificantDigits, -1)
        XCTAssertEqual(numberFormatter.maximumSignificantDigits, -1)
        XCTAssertEqual(numberFormatter.usesSignificantDigits, false)
        XCTAssertEqual(numberFormatter.formatWidth, -1)
        XCTAssertEqual(numberFormatter.format, "#########################################0;0;#########################################0")
        XCTAssertEqual(numberFormatter.positiveFormat, "#########################################0")
        XCTAssertEqual(numberFormatter.negativeFormat, "#########################################0")
        XCTAssertNil(numberFormatter.multiplier)
        XCTAssertFalse(numberFormatter.usesGroupingSeparator)
        XCTAssertEqual(numberFormatter.groupingSize, 0)
        XCTAssertEqual(numberFormatter.secondaryGroupingSize, 0)
    }

    func test_defaultDecimalPropertyValues() {
        let numberFormatter = NumberFormatter()
        numberFormatter.numberStyle = .decimal
        XCTAssertEqual(numberFormatter.generatesDecimalNumbers, false)
        XCTAssertEqual(numberFormatter.localizesFormat, true)
        XCTAssertEqual(numberFormatter.locale, Locale.current)
        XCTAssertEqual(numberFormatter.minimumIntegerDigits, 1)
        XCTAssertEqual(numberFormatter.maximumIntegerDigits, 2_000_000_000)
        XCTAssertEqual(numberFormatter.minimumFractionDigits, 0)
        XCTAssertEqual(numberFormatter.maximumFractionDigits, 3)
        XCTAssertEqual(numberFormatter.minimumSignificantDigits, -1)
        XCTAssertEqual(numberFormatter.maximumSignificantDigits, -1)
        XCTAssertEqual(numberFormatter.usesSignificantDigits, false)
        XCTAssertEqual(numberFormatter.formatWidth, -1)
        XCTAssertEqual(numberFormatter.format, "#,##0.###;0;#,##0.###")
        XCTAssertEqual(numberFormatter.positiveFormat, "#,##0.###")
        XCTAssertEqual(numberFormatter.negativeFormat, "#,##0.###")
        XCTAssertNil(numberFormatter.multiplier)
        XCTAssertTrue(numberFormatter.usesGroupingSeparator)
        XCTAssertEqual(numberFormatter.groupingSize, 3)
        XCTAssertEqual(numberFormatter.secondaryGroupingSize, 0)
    }

    func test_defaultCurrencyPropertyValues() {
        let numberFormatter = NumberFormatter()
        let currency = Locale.current.currencySymbol ?? ""
        numberFormatter.numberStyle = .currency
        XCTAssertEqual(numberFormatter.generatesDecimalNumbers, false)
        XCTAssertEqual(numberFormatter.localizesFormat, true)
        XCTAssertEqual(numberFormatter.locale, Locale.current)
        XCTAssertEqual(numberFormatter.minimumIntegerDigits, 1)
        XCTAssertEqual(numberFormatter.maximumIntegerDigits, 2_000_000_000)
        XCTAssertEqual(numberFormatter.minimumFractionDigits, 2)
        XCTAssertEqual(numberFormatter.maximumFractionDigits, 2)
        XCTAssertEqual(numberFormatter.minimumSignificantDigits, -1)
        XCTAssertEqual(numberFormatter.maximumSignificantDigits, -1)
        XCTAssertEqual(numberFormatter.usesSignificantDigits, false)
        XCTAssertEqual(numberFormatter.formatWidth, -1)
        XCTAssertEqual(numberFormatter.format, "Β€#,##0.00;\(currency)0.00;Β€#,##0.00")
        XCTAssertEqual(numberFormatter.positiveFormat, "Β€#,##0.00")
        XCTAssertEqual(numberFormatter.negativeFormat, "Β€#,##0.00")
        XCTAssertNil(numberFormatter.multiplier)
        XCTAssertTrue(numberFormatter.usesGroupingSeparator)
        XCTAssertEqual(numberFormatter.groupingSize, 3)
        XCTAssertEqual(numberFormatter.secondaryGroupingSize, 0)
    }

    func test_defaultPercentPropertyValues() {
        let numberFormatter = NumberFormatter()
        numberFormatter.numberStyle = .percent
        XCTAssertEqual(numberFormatter.generatesDecimalNumbers, false)
        XCTAssertEqual(numberFormatter.localizesFormat, true)
        XCTAssertEqual(numberFormatter.locale, Locale.current)
        XCTAssertEqual(numberFormatter.minimumIntegerDigits, 1)
        XCTAssertEqual(numberFormatter.maximumIntegerDigits, 2_000_000_000)
        XCTAssertEqual(numberFormatter.minimumFractionDigits, 0)
        XCTAssertEqual(numberFormatter.maximumFractionDigits, 0)
        XCTAssertEqual(numberFormatter.minimumSignificantDigits, -1)
        XCTAssertEqual(numberFormatter.maximumSignificantDigits, -1)
        XCTAssertEqual(numberFormatter.usesSignificantDigits, false)
        XCTAssertEqual(numberFormatter.formatWidth, -1)
        XCTAssertEqual(numberFormatter.format, "#,##0%;0%;#,##0%")
        XCTAssertEqual(numberFormatter.positiveFormat, "#,##0%")
        XCTAssertEqual(numberFormatter.negativeFormat, "#,##0%")
        XCTAssertEqual(numberFormatter.multiplier, NSNumber(100))
        XCTAssertTrue(numberFormatter.usesGroupingSeparator)
        XCTAssertEqual(numberFormatter.groupingSize, 3)
        XCTAssertEqual(numberFormatter.secondaryGroupingSize, 0)
    }

    func test_defaultScientificPropertyValues() {
        let numberFormatter = NumberFormatter()
        numberFormatter.numberStyle = .scientific
        XCTAssertEqual(numberFormatter.generatesDecimalNumbers, false)
        XCTAssertEqual(numberFormatter.localizesFormat, true)
        XCTAssertEqual(numberFormatter.locale, Locale.current)
        XCTAssertEqual(numberFormatter.minimumIntegerDigits, 1)
        XCTAssertEqual(numberFormatter.maximumIntegerDigits, 1)
        XCTAssertEqual(numberFormatter.minimumFractionDigits, 0)
        XCTAssertEqual(numberFormatter.maximumFractionDigits, 0)
        XCTAssertEqual(numberFormatter.minimumSignificantDigits, -1)
        XCTAssertEqual(numberFormatter.maximumSignificantDigits, -1)
        XCTAssertEqual(numberFormatter.usesSignificantDigits, false)
        XCTAssertEqual(numberFormatter.formatWidth, -1)
#if !DARWIN_COMPATIBILITY_TESTS
        XCTAssertEqual(numberFormatter.format, "#E0;0E0;#E0")
#else
        XCTAssertEqual(numberFormatter.format, "#E0;1E-100;#E0")
#endif
        XCTAssertEqual(numberFormatter.positiveFormat, "#E0")
        XCTAssertEqual(numberFormatter.negativeFormat, "#E0")
        XCTAssertNil(numberFormatter.multiplier)
        XCTAssertFalse(numberFormatter.usesGroupingSeparator)
        XCTAssertEqual(numberFormatter.groupingSize, 0)
        XCTAssertEqual(numberFormatter.secondaryGroupingSize, 0)
    }

    func test_defaultSpelloutPropertyValues() {
        let numberFormatter = NumberFormatter()
        numberFormatter.numberStyle = .spellOut
        XCTAssertEqual(numberFormatter.generatesDecimalNumbers, false)
        XCTAssertEqual(numberFormatter.localizesFormat, true)
        XCTAssertEqual(numberFormatter.locale, Locale.current)
        XCTAssertEqual(numberFormatter.minimumIntegerDigits, 0)
        XCTAssertEqual(numberFormatter.maximumIntegerDigits, 0)
        XCTAssertEqual(numberFormatter.minimumFractionDigits, 0)
        XCTAssertEqual(numberFormatter.maximumFractionDigits, 0)
        XCTAssertEqual(numberFormatter.minimumSignificantDigits, 0)
        XCTAssertEqual(numberFormatter.maximumSignificantDigits, 0)
        XCTAssertEqual(numberFormatter.usesSignificantDigits, false)
        XCTAssertEqual(numberFormatter.formatWidth, 0)
#if !DARWIN_COMPATIBILITY_TESTS
        XCTAssertEqual(numberFormatter.format, "(null);zero;(null)")
#else
        XCTAssertEqual(numberFormatter.format, "(null);zero point zero;(null)")
#endif
        XCTAssertEqual(numberFormatter.positiveFormat, nil)
        XCTAssertEqual(numberFormatter.negativeFormat, nil)
        XCTAssertNil(numberFormatter.multiplier)
        XCTAssertFalse(numberFormatter.usesGroupingSeparator)
        XCTAssertEqual(numberFormatter.groupingSize, 0)
        XCTAssertEqual(numberFormatter.secondaryGroupingSize, 0)
    }

    func test_defaultOrdinalPropertyValues() {
        let numberFormatter = NumberFormatter()
        numberFormatter.numberStyle = .ordinal
        XCTAssertEqual(numberFormatter.generatesDecimalNumbers, false)
        XCTAssertEqual(numberFormatter.localizesFormat, true)
        XCTAssertEqual(numberFormatter.locale, Locale.current)
        XCTAssertEqual(numberFormatter.minimumIntegerDigits, 0)
        XCTAssertEqual(numberFormatter.maximumIntegerDigits, 0)
        XCTAssertEqual(numberFormatter.minimumFractionDigits, 0)
        XCTAssertEqual(numberFormatter.maximumFractionDigits, 0)
        XCTAssertEqual(numberFormatter.minimumSignificantDigits, 0)
        XCTAssertEqual(numberFormatter.maximumSignificantDigits, 0)
        XCTAssertEqual(numberFormatter.usesSignificantDigits, false)
        XCTAssertEqual(numberFormatter.formatWidth, 0)
        XCTAssertEqual(numberFormatter.format, "(null);0th;(null)")
        XCTAssertEqual(numberFormatter.positiveFormat, nil)
        XCTAssertEqual(numberFormatter.negativeFormat, nil)
        XCTAssertNil(numberFormatter.multiplier)
        XCTAssertFalse(numberFormatter.usesGroupingSeparator)
        XCTAssertEqual(numberFormatter.groupingSize, 0)
        XCTAssertEqual(numberFormatter.secondaryGroupingSize, 0)
    }

    func test_defaultCurrencyISOCodePropertyValues() {
        let numberFormatter = NumberFormatter()
        numberFormatter.numberStyle = .currencyISOCode
        numberFormatter.locale = Locale(identifier: "en_US")
        XCTAssertEqual(numberFormatter.generatesDecimalNumbers, false)
        XCTAssertEqual(numberFormatter.localizesFormat, true)
        XCTAssertEqual(numberFormatter.locale, Locale(identifier: "en_US"))
        XCTAssertEqual(numberFormatter.minimumIntegerDigits, 1)
        XCTAssertEqual(numberFormatter.maximumIntegerDigits, 2_000_000_000)
        XCTAssertEqual(numberFormatter.minimumFractionDigits, 2)
        XCTAssertEqual(numberFormatter.maximumFractionDigits, 2)
        XCTAssertEqual(numberFormatter.minimumSignificantDigits, -1)
        XCTAssertEqual(numberFormatter.maximumSignificantDigits, -1)
        XCTAssertEqual(numberFormatter.usesSignificantDigits, false)
        XCTAssertEqual(numberFormatter.formatWidth, -1)
        XCTAssertEqual(numberFormatter.format, "€€#,##0.00;USD\(currencySpacing)0.00;€€#,##0.00")
        XCTAssertEqual(numberFormatter.positiveFormat, "€€#,##0.00")
        XCTAssertEqual(numberFormatter.negativeFormat, "€€#,##0.00")
        XCTAssertNil(numberFormatter.multiplier)
        XCTAssertTrue(numberFormatter.usesGroupingSeparator)
        XCTAssertEqual(numberFormatter.groupingSize, 3)
        XCTAssertEqual(numberFormatter.secondaryGroupingSize, 0)
        XCTAssertEqual(numberFormatter.string(from: NSNumber(1234567890)), "USD\(currencySpacing)1,234,567,890.00")
    }

    func test_defaultCurrencyPluralPropertyValues() {
        let numberFormatter = NumberFormatter()
        numberFormatter.numberStyle = .currencyPlural
        numberFormatter.locale = Locale(identifier: "en_GB")
        XCTAssertEqual(numberFormatter.generatesDecimalNumbers, false)
        XCTAssertEqual(numberFormatter.localizesFormat, true)
        XCTAssertEqual(numberFormatter.locale, Locale(identifier: "en_GB"))
        XCTAssertEqual(numberFormatter.minimumIntegerDigits, 0)
        XCTAssertEqual(numberFormatter.maximumIntegerDigits, 0)
        XCTAssertEqual(numberFormatter.minimumFractionDigits, 0)
        XCTAssertEqual(numberFormatter.maximumFractionDigits, 0)
        XCTAssertEqual(numberFormatter.minimumSignificantDigits, 0)
        XCTAssertEqual(numberFormatter.maximumSignificantDigits, 0)
        XCTAssertEqual(numberFormatter.usesSignificantDigits, false)
        XCTAssertEqual(numberFormatter.formatWidth, 0)
        XCTAssertEqual(numberFormatter.format, "(null);0.00 British pounds;(null)")
        XCTAssertEqual(numberFormatter.positiveFormat, nil)
        XCTAssertEqual(numberFormatter.negativeFormat, nil)
        XCTAssertNil(numberFormatter.multiplier)
        XCTAssertFalse(numberFormatter.usesGroupingSeparator)
        XCTAssertEqual(numberFormatter.groupingSize, 0)
        XCTAssertEqual(numberFormatter.secondaryGroupingSize, 0)
    }

    func test_defaultCurrenyAccountingPropertyValues() {
        let numberFormatter = NumberFormatter()
        numberFormatter.numberStyle = .currencyAccounting
        numberFormatter.locale = Locale(identifier: "en_US")
        XCTAssertEqual(numberFormatter.generatesDecimalNumbers, false)
        XCTAssertEqual(numberFormatter.localizesFormat, true)
        XCTAssertEqual(numberFormatter.minimumIntegerDigits, 1)
        XCTAssertEqual(numberFormatter.maximumIntegerDigits, 2_000_000_000)
        XCTAssertEqual(numberFormatter.minimumFractionDigits, 2)
        XCTAssertEqual(numberFormatter.maximumFractionDigits, 2)
        XCTAssertEqual(numberFormatter.minimumSignificantDigits, -1)
        XCTAssertEqual(numberFormatter.maximumSignificantDigits, -1)
        XCTAssertEqual(numberFormatter.usesSignificantDigits, false)
        XCTAssertEqual(numberFormatter.formatWidth, -1)
        XCTAssertEqual(numberFormatter.format, "Β€#,##0.00;$0.00;(Β€#,##0.00)")
        XCTAssertEqual(numberFormatter.positiveFormat, "Β€#,##0.00")
        XCTAssertEqual(numberFormatter.negativeFormat, "(Β€#,##0.00)")
        XCTAssertNil(numberFormatter.multiplier)
        XCTAssertTrue(numberFormatter.usesGroupingSeparator)
        XCTAssertEqual(numberFormatter.groupingSize, 3)
        XCTAssertEqual(numberFormatter.secondaryGroupingSize, 0)
    }

    func test_currencyCode() {
        let numberFormatter = NumberFormatter()
        numberFormatter.locale = Locale(identifier: "en_GB")
        numberFormatter.numberStyle = .currency
        XCTAssertEqual(numberFormatter.format, "Β€#,##0.00;Β£0.00;Β€#,##0.00")
        XCTAssertEqual(numberFormatter.string(from: 1.1), "Β£1.10")
        XCTAssertEqual(numberFormatter.string(from: 0), "Β£0.00")
        XCTAssertEqual(numberFormatter.string(from: -1.1), "-Β£1.10")

        numberFormatter.currencyCode = "T"
        XCTAssertEqual(numberFormatter.currencyCode, "T")
        XCTAssertEqual(numberFormatter.currencySymbol, "Β£")
        XCTAssertEqual(numberFormatter.format, "Β€#,##0.00;Β£0.00;Β€#,##0.00")
        numberFormatter.currencyDecimalSeparator = "_"
        XCTAssertEqual(numberFormatter.format, "Β€#,##0.00;Β£0_00;Β€#,##0.00")

        let formattedString = numberFormatter.string(from: 42)
        XCTAssertEqual(formattedString, "Β£42_00")

        // Check that the currencyCode is preferred over the locale when no currencySymbol is set
        let codeFormatter = NumberFormatter()
        codeFormatter.numberStyle = .currency
        codeFormatter.locale = Locale(identifier: "en_US")
        codeFormatter.currencyCode = "GBP"
        XCTAssertEqual(codeFormatter.string(from: 3.02), "Β£3.02")
    }

    func test_decimalSeparator() {
        let numberFormatter = NumberFormatter()
        numberFormatter.numberStyle = .decimal
        XCTAssertEqual(numberFormatter.format, "#,##0.###;0;#,##0.###")

        let separator = "-"
        numberFormatter.decimalSeparator = separator
        XCTAssertEqual(numberFormatter.format, "#,##0.###;0;#,##0.###")
        XCTAssertEqual(numberFormatter.decimalSeparator, separator)

        let formattedString = numberFormatter.string(from: 42.42)
        XCTAssertEqual(formattedString, "42-42")
    }
    
    func test_currencyDecimalSeparator() {
        let numberFormatter = NumberFormatter()
        numberFormatter.locale = Locale(identifier: "fr_FR")
        numberFormatter.numberStyle = .currency
        numberFormatter.currencyDecimalSeparator = "-"
        numberFormatter.currencyCode = "T"
        XCTAssertEqual(numberFormatter.format, "#,##0.00Β Β€;0-00\(currencySpacing)€;#,##0.00Β Β€")
        let formattedString = numberFormatter.string(from: 42.42)
        XCTAssertEqual(formattedString, "42-42\(currencySpacing)€")
    }
    
    func test_alwaysShowDecimalSeparator() {
        let numberFormatter = NumberFormatter()
        numberFormatter.decimalSeparator = "-"
        numberFormatter.alwaysShowsDecimalSeparator = true
        XCTAssertEqual(numberFormatter.format, "#########################################0.;0-;#########################################0.")
        let formattedString = numberFormatter.string(from: 42)
        XCTAssertEqual(formattedString, "42-")
    }
    
    func test_groupingSeparator() {
        let decFormatter1 = NumberFormatter()
        XCTAssertEqual(decFormatter1.groupingSize, 0)
        decFormatter1.numberStyle = .decimal
        XCTAssertEqual(decFormatter1.groupingSize, 3)
        XCTAssertEqual(decFormatter1.format, "#,##0.###;0;#,##0.###")

        let decFormatter2 = NumberFormatter()
        XCTAssertEqual(decFormatter2.groupingSize, 0)
        decFormatter2.groupingSize = 1
        decFormatter2.numberStyle = .decimal
        XCTAssertEqual(decFormatter2.groupingSize, 1)
        XCTAssertEqual(decFormatter2.format, "#,0.###;0;#,0.###")

        let numberFormatter = NumberFormatter()
        numberFormatter.usesGroupingSeparator = true
        numberFormatter.groupingSeparator = "_"
        XCTAssertEqual(numberFormatter.groupingSize, 0)
        XCTAssertEqual(numberFormatter.format, "#########################################0;0;#########################################0")
        numberFormatter.groupingSize = 3
        XCTAssertEqual(numberFormatter.format, "#######################################,##0;0;#######################################,##0")

        let formattedString = numberFormatter.string(from: 42_000)
        XCTAssertEqual(formattedString, "42_000")
    }
    
    func test_percentSymbol() {
        let numberFormatter = NumberFormatter()
        numberFormatter.numberStyle = .percent
        numberFormatter.percentSymbol = "πŸ’―"
        XCTAssertEqual(numberFormatter.format, "#,##0%;0πŸ’―;#,##0%")

        let formattedString = numberFormatter.string(from: 0.42)
        XCTAssertEqual(formattedString, "42πŸ’―")
    }
    
    func test_zeroSymbol() {
        let numberFormatter = NumberFormatter()
        XCTAssertEqual(numberFormatter.numberStyle, .none)
        XCTAssertEqual(numberFormatter.generatesDecimalNumbers, false)
        XCTAssertEqual(numberFormatter.localizesFormat, true)
        XCTAssertEqual(numberFormatter.locale, Locale.current)
        XCTAssertEqual(numberFormatter.minimumIntegerDigits, 1)
        XCTAssertEqual(numberFormatter.maximumIntegerDigits, 42)
        XCTAssertEqual(numberFormatter.minimumFractionDigits, 0)
        XCTAssertEqual(numberFormatter.maximumFractionDigits, 0)
        XCTAssertEqual(numberFormatter.minimumSignificantDigits, -1)
        XCTAssertEqual(numberFormatter.maximumSignificantDigits, -1)
        XCTAssertEqual(numberFormatter.usesSignificantDigits, false)
        XCTAssertEqual(numberFormatter.formatWidth, -1)
        XCTAssertEqual(numberFormatter.format, "#########################################0;0;#########################################0")
        numberFormatter.zeroSymbol = "⚽️"
        XCTAssertEqual(numberFormatter.format, "#########################################0;⚽️;#########################################0")

        let formattedString = numberFormatter.string(from: 0)
        XCTAssertEqual(formattedString, "⚽️")
    }
    var unknownZero: Int = 0
    
    func test_notANumberSymbol() {
        let numberFormatter = NumberFormatter()
        numberFormatter.notANumberSymbol = "πŸ‘½"
        XCTAssertEqual(numberFormatter.format, "#########################################0;0;#########################################0")
        let number: Double = -42
        let numberObject = NSNumber(value: sqrt(number))
        let formattedString = numberFormatter.string(from: numberObject)
        XCTAssertEqual(formattedString, "πŸ‘½")
    }
    
    func test_positiveInfinitySymbol() {
        let numberFormatter = NumberFormatter()
        numberFormatter.positiveInfinitySymbol = "πŸš€"
        XCTAssertEqual(numberFormatter.format, "#########################################0;0;#########################################0")

        let numberObject = NSNumber(value: Double(42.0) / Double(0))
        let formattedString = numberFormatter.string(from: numberObject)
        XCTAssertEqual(formattedString, "πŸš€")
    }
    
    func test_minusSignSymbol() {
        let numberFormatter = NumberFormatter()
        numberFormatter.minusSign = "πŸ‘Ž"
        XCTAssertEqual(numberFormatter.format, "#########################################0;0;#########################################0")
        let formattedString = numberFormatter.string(from: -42)
        XCTAssertEqual(formattedString, "πŸ‘Ž42")
    }
    
    func test_plusSignSymbol() {
        // ex. 1.0E+1 in scientific notation
        let numberFormatter = NumberFormatter()
        let format = "#E+0"
        numberFormatter.format = format
        XCTAssertEqual(numberFormatter.positiveFormat, "#E+0")
        XCTAssertEqual(numberFormatter.negativeFormat, "-#E+0")
#if !DARWIN_COMPATIBILITY_TESTS
        XCTAssertEqual(numberFormatter.zeroSymbol, "0E+0")
        XCTAssertEqual(numberFormatter.format, "#E+0;0E+0;-#E+0")
        XCTAssertEqual(numberFormatter.string(from: 0), "0E+0")
#else
        XCTAssertEqual(numberFormatter.zeroSymbol, "1E-100")
        XCTAssertEqual(numberFormatter.format, "#E+0;1E-100;-#E+0")
        XCTAssertEqual(numberFormatter.string(from: 0), "1E-100")
#endif
        XCTAssertEqual(numberFormatter.plusSign, "+")
        let sign = "πŸ‘"
        numberFormatter.plusSign = sign
        XCTAssertEqual(numberFormatter.plusSign, sign)

        let formattedString = numberFormatter.string(from: 420000000000000000)
        XCTAssertNotNil(formattedString)
        XCTAssertEqual(formattedString, "4.2EπŸ‘17")

        // Verify a negative exponent does not have the πŸ‘
        let noPlusString = numberFormatter.string(from: -0.420)
        XCTAssertNotNil(noPlusString)
        if let fmt = noPlusString {
            let contains: Bool = fmt.contains(sign)
            XCTAssertFalse(contains, "Expected format of -0.420 (-4.2E-1) shouldn't have a plus sign which was set as \(sign)")
        }
    }

    func test_currencySymbol() {
        let numberFormatter = NumberFormatter()
        numberFormatter.numberStyle = .currency
        numberFormatter.currencySymbol = "🍯"
        numberFormatter.currencyDecimalSeparator = "_"
        XCTAssertEqual(numberFormatter.format, "€#,##0.00;🍯0_00;€#,##0.00")
        let formattedString = numberFormatter.string(from: 42)
        XCTAssertEqual(formattedString, "🍯42_00")
    }
    
    func test_exponentSymbol() {
        let numberFormatter = NumberFormatter()
        numberFormatter.numberStyle = .scientific
        numberFormatter.exponentSymbol = "⬆️"
#if DARWIN_COMPATIBILITY_TESTS
        XCTAssertEqual(numberFormatter.format, "#E0;1⬆️-100;#E0")
#else
        XCTAssertEqual(numberFormatter.format, "#E0;0⬆️0;#E0")
#endif
        let formattedString = numberFormatter.string(from: 42)
        XCTAssertEqual(formattedString, "4.2⬆️1")
    }
    
    func test_decimalMinimumIntegerDigits() {
        let numberFormatter1 = NumberFormatter()
        XCTAssertEqual(numberFormatter1.minimumIntegerDigits, 1)
        numberFormatter1.minimumIntegerDigits = 3
        numberFormatter1.numberStyle = .decimal
        XCTAssertEqual(numberFormatter1.minimumIntegerDigits, 3)
        XCTAssertEqual(numberFormatter1.format, "#,000.###;000;#,000.###")

        let numberFormatter = NumberFormatter()
        XCTAssertEqual(numberFormatter.minimumIntegerDigits, 1)
        numberFormatter.numberStyle = .decimal
        XCTAssertEqual(numberFormatter.minimumIntegerDigits, 1)
        numberFormatter.minimumIntegerDigits = 3
        XCTAssertEqual(numberFormatter.format, "#,000.###;000;#,000.###")
        var formattedString = numberFormatter.string(from: 0)
        XCTAssertEqual(formattedString, "000")

        numberFormatter.numberStyle = .decimal
        XCTAssertEqual(numberFormatter.minimumIntegerDigits, 3)
        XCTAssertEqual(numberFormatter.format, "#,000.###;000;#,000.###")
        formattedString = numberFormatter.string(from: 0.1)
        XCTAssertEqual(formattedString, "000.1")
    }

    func test_currencyMinimumIntegerDigits() {
        // If .minimumIntegerDigits is set to 0 before .numberStyle change, preserve the value
        let formatter = NumberFormatter()
        formatter.locale = Locale(identifier: "en_GB")
        XCTAssertEqual(formatter.minimumIntegerDigits, 1)
        formatter.minimumIntegerDigits = 0
        formatter.numberStyle = .currency
        XCTAssertEqual(formatter.format, "Β€#,###.00;Β£.00;Β€#,###.00")
        XCTAssertEqual(formatter.minimumIntegerDigits, 0)
        formatter.locale = Locale(identifier: "en_US")
        XCTAssertEqual(formatter.format, "Β€#,###.00;$.00;Β€#,###.00")
        XCTAssertEqual(formatter.string(from: 0), "$.00")
        XCTAssertEqual(formatter.string(from: 1.23), "$1.23")
        XCTAssertEqual(formatter.string(from: 123.4), "$123.40")

        // If .minimumIntegerDigits is not set before .numberStyle change, update the value
        let formatter2 = NumberFormatter()
        formatter2.locale = Locale(identifier: "en_GB")
        XCTAssertEqual(formatter2.minimumIntegerDigits, 1)
        formatter2.numberStyle = .currency
        XCTAssertEqual(formatter2.format, "Β€#,##0.00;Β£0.00;Β€#,##0.00")
        XCTAssertEqual(formatter2.minimumIntegerDigits, 1)
        formatter2.locale = Locale(identifier: "en_US")
        XCTAssertEqual(formatter2.string(from: 0.001), "$0.00")
        XCTAssertEqual(formatter2.string(from: 1.234), "$1.23")
        XCTAssertEqual(formatter2.string(from: 123456.7), "$123,456.70")
    }

    func test_percentMinimumIntegerDigits() {
        // If .minimumIntegerDigits is set to 0 before .numberStyle change, preserve the value
        let formatter = NumberFormatter()
        XCTAssertEqual(formatter.minimumIntegerDigits, 1)
        formatter.minimumIntegerDigits = 0
        formatter.numberStyle = .percent
        XCTAssertEqual(formatter.minimumIntegerDigits, 0)
        formatter.locale = Locale(identifier: "en_US")
        XCTAssertEqual(formatter.string(from: 0), "0%")
        XCTAssertEqual(formatter.string(from: 1.234), "123%")
        XCTAssertEqual(formatter.string(from: 123.4), "12,340%")

        // If .minimumIntegerDigits is not set before .numberStyle change, update the value
        let formatter2 = NumberFormatter()
        XCTAssertEqual(formatter2.minimumIntegerDigits, 1)
        formatter2.numberStyle = .percent
        XCTAssertEqual(formatter2.minimumIntegerDigits, 1)
        formatter2.locale = Locale(identifier: "en_US")
        XCTAssertEqual(formatter2.string(from: 0.01), "1%")
        XCTAssertEqual(formatter2.string(from: 1.234), "123%")
        XCTAssertEqual(formatter2.string(from: 123456.7), "12,345,670%")
    }

    func test_scientificMinimumIntegerDigits() {
        // If .minimumIntegerDigits is set to 0 before .numberStyle change, preserve the value
        let formatter = NumberFormatter()
        XCTAssertEqual(formatter.minimumIntegerDigits, 1)
        formatter.minimumIntegerDigits = 0
        formatter.numberStyle = .scientific
        XCTAssertEqual(formatter.minimumIntegerDigits, 0)
        formatter.locale = Locale(identifier: "en_US")
        XCTAssertEqual(formatter.string(from: 0), "0E0")
        XCTAssertEqual(formatter.string(from: 1.23), "1.23E0")
        XCTAssertEqual(formatter.string(from: 123.4), "1.234E2")

        // If .minimumIntegerDigits is not set before .numberStyle change, update the value
        let formatter2 = NumberFormatter()
        XCTAssertEqual(formatter2.minimumIntegerDigits, 1)
        formatter2.numberStyle = .scientific
        XCTAssertEqual(formatter2.minimumIntegerDigits, 1)
        formatter2.locale = Locale(identifier: "en_US")
        XCTAssertEqual(formatter2.string(from: 0.01), "1E-2")
        XCTAssertEqual(formatter2.string(from: 1.234), "1.234E0")
        XCTAssertEqual(formatter2.string(from: 123456.7), "1.234567E5")
    }

    func test_spellOutMinimumIntegerDigits() {
        // If .minimumIntegerDigits is set to 0 before .numberStyle change, preserve the value
        let formatter = NumberFormatter()
        XCTAssertEqual(formatter.minimumIntegerDigits, 1)
        formatter.minimumIntegerDigits = 0
        formatter.numberStyle = .spellOut
        XCTAssertEqual(formatter.minimumIntegerDigits, 0)
        formatter.locale = Locale(identifier: "en_US")
        XCTAssertEqual(formatter.string(from: 0), "zero")
        XCTAssertEqual(formatter.string(from: 1.23), "one point two three")
        XCTAssertEqual(formatter.string(from: 123.4), "one hundred twenty-three point four")

        // If .minimumIntegerDigits is not set before .numberStyle change, update the value
        let formatter2 = NumberFormatter()
        XCTAssertEqual(formatter2.minimumIntegerDigits, 1)
        formatter2.numberStyle = .spellOut
        XCTAssertEqual(formatter2.minimumIntegerDigits, 0)
        formatter2.locale = Locale(identifier: "en_US")
        XCTAssertEqual(formatter2.string(from: 0.01), "zero point zero one")
        XCTAssertEqual(formatter2.string(from: 1.234), "one point two three four")
        XCTAssertEqual(formatter2.string(from: 123456.7), "one hundred twenty-three thousand four hundred fifty-six point seven")
    }

    func test_ordinalMinimumIntegerDigits() {
        // If .minimumIntegerDigits is set to 0 before .numberStyle change, preserve the value
        let formatter = NumberFormatter()
        XCTAssertEqual(formatter.minimumIntegerDigits, 1)
        formatter.minimumIntegerDigits = 0
        formatter.numberStyle = .ordinal
        XCTAssertEqual(formatter.minimumIntegerDigits, 0)
        formatter.locale = Locale(identifier: "en_US")
        XCTAssertEqual(formatter.string(from: 0), "0th")
        XCTAssertEqual(formatter.string(from: 1.23), "1st")
        XCTAssertEqual(formatter.string(from: 123.4), "123rd")

        // If .minimumIntegerDigits is not set before .numberStyle change, update the value
        let formatter2 = NumberFormatter()
        XCTAssertEqual(formatter2.minimumIntegerDigits, 1)
        formatter2.numberStyle = .ordinal
        XCTAssertEqual(formatter2.minimumIntegerDigits, 0)
        formatter2.locale = Locale(identifier: "en_US")
        XCTAssertEqual(formatter2.string(from: 0.01), "0th")
        XCTAssertEqual(formatter2.string(from: 4.234), "4th")
        XCTAssertEqual(formatter2.string(from: 42), "42nd")
    }

    func test_currencyPluralMinimumIntegerDigits() {
        // If .minimumIntegerDigits is set to 0 before .numberStyle change, preserve the value
        let formatter = NumberFormatter()
        XCTAssertEqual(formatter.minimumIntegerDigits, 1)
        formatter.minimumIntegerDigits = 0
        formatter.numberStyle = .currencyPlural
        XCTAssertEqual(formatter.minimumIntegerDigits, 0)
        formatter.locale = Locale(identifier: "en_US")
        XCTAssertEqual(formatter.string(from: 0), "0.00 US dollars")
        XCTAssertEqual(formatter.string(from: 1.23), "1.23 US dollars")
        XCTAssertEqual(formatter.string(from: 123.4), "123.40 US dollars")

        // If .minimumIntegerDigits is not set before .numberStyle change, update the value
        let formatter2 = NumberFormatter()
        XCTAssertEqual(formatter2.minimumIntegerDigits, 1)
        formatter2.numberStyle = .currencyPlural
        XCTAssertEqual(formatter2.minimumIntegerDigits, 0)
        formatter2.locale = Locale(identifier: "en_US")
        XCTAssertEqual(formatter2.string(from: 0.01), "0.01 US dollars")
        XCTAssertEqual(formatter2.string(from: 1.234), "1.23 US dollars")
        XCTAssertEqual(formatter2.string(from: 123456.7), "123,456.70 US dollars")
    }

    func test_currencyISOCodeMinimumIntegerDigits() {
        // If .minimumIntegerDigits is set to 0 before .numberStyle change, preserve the value
        let formatter = NumberFormatter()
        XCTAssertEqual(formatter.minimumIntegerDigits, 1)
        formatter.minimumIntegerDigits = 0
        formatter.numberStyle = .currencyISOCode
        XCTAssertEqual(formatter.minimumIntegerDigits, 0)
        formatter.locale = Locale(identifier: "en_US")
        XCTAssertEqual(formatter.string(from: 0), "USD.00")
        XCTAssertEqual(formatter.string(from: 1.23), "USD\(currencySpacing)1.23")
        XCTAssertEqual(formatter.string(from: 123.4), "USD\(currencySpacing)123.40")

        // If .minimumIntegerDigits is not set before .numberStyle change, update the value
        let formatter2 = NumberFormatter()
        XCTAssertEqual(formatter2.minimumIntegerDigits, 1)
        formatter2.numberStyle = .currencyISOCode
        XCTAssertEqual(formatter2.minimumIntegerDigits, 1)
        formatter2.locale = Locale(identifier: "en_US")
        XCTAssertEqual(formatter2.string(from: 0.01), "USD\(currencySpacing)0.01")
        XCTAssertEqual(formatter2.string(from: 1.234), "USD\(currencySpacing)1.23")
        XCTAssertEqual(formatter2.string(from: 123456.7), "USD\(currencySpacing)123,456.70")
    }

    func test_currencyAccountingMinimumIntegerDigits() {
        // If .minimumIntegerDigits is set to 0 before .numberStyle change, preserve the value
        let formatter = NumberFormatter()
        XCTAssertEqual(formatter.minimumIntegerDigits, 1)
        formatter.minimumIntegerDigits = 0
        formatter.numberStyle = .currencyAccounting
        XCTAssertEqual(formatter.minimumIntegerDigits, 0)
        formatter.locale = Locale(identifier: "en_US")
        XCTAssertEqual(formatter.string(from: 0), "$.00")
        XCTAssertEqual(formatter.string(from: 1.23), "$1.23")
        XCTAssertEqual(formatter.string(from: 123.4), "$123.40")

        // If .minimumIntegerDigits is not set before .numberStyle change, update the value
        let formatter2 = NumberFormatter()
        XCTAssertEqual(formatter2.minimumIntegerDigits, 1)
        formatter2.numberStyle = .currencyAccounting
        XCTAssertEqual(formatter2.minimumIntegerDigits, 1)
        formatter2.locale = Locale(identifier: "en_US")
        XCTAssertEqual(formatter2.string(from: 0), "$0.00")
        XCTAssertEqual(formatter2.string(from: 1.23), "$1.23")
        XCTAssertEqual(formatter2.string(from: 123.4), "$123.40")
    }

    func test_maximumIntegerDigits() {
        let numberFormatter = NumberFormatter()
        numberFormatter.maximumIntegerDigits = 3
        numberFormatter.minimumIntegerDigits = 3
        let formattedString = numberFormatter.string(from: 1_000)
        XCTAssertEqual(formattedString, "000")
    }
    
    func test_minimumFractionDigits() {
        let numberFormatter = NumberFormatter()
        numberFormatter.minimumFractionDigits = 3
        numberFormatter.decimalSeparator = "-"
        let formattedString = numberFormatter.string(from: 42)
        XCTAssertEqual(formattedString, "42-000")
    }
    
    func test_maximumFractionDigits() {
        let numberFormatter = NumberFormatter()
        numberFormatter.maximumFractionDigits = 3
        numberFormatter.decimalSeparator = "-"
        let formattedString = numberFormatter.string(from: 42.4242)
        XCTAssertEqual(formattedString, "42-424")
    }
    
    func test_groupingSize() {
        let numberFormatter = NumberFormatter()
        XCTAssertEqual(numberFormatter.groupingSize, 0)
        numberFormatter.groupingSize = 4
        numberFormatter.groupingSeparator = "_"
        numberFormatter.usesGroupingSeparator = true
        let formattedString = numberFormatter.string(from: 42_000)
        XCTAssertEqual(formattedString, "4_2000")
    }
    
    func test_secondaryGroupingSize() {
        let numberFormatter = NumberFormatter()
        numberFormatter.groupingSize = 3
        numberFormatter.secondaryGroupingSize = 2
        numberFormatter.groupingSeparator = "_"
        numberFormatter.usesGroupingSeparator = true
        let formattedString = numberFormatter.string(from: 42_000_000)
        XCTAssertEqual(formattedString, "4_20_00_000")
    }
    
    func test_roundingMode() {
        let numberFormatter = NumberFormatter()
        numberFormatter.maximumFractionDigits = 0
        numberFormatter.roundingMode = .ceiling
        let formattedString = numberFormatter.string(from: 41.0001)
        XCTAssertEqual(formattedString, "42")
    }
    
    func test_roundingIncrement() {
        let numberFormatter = NumberFormatter()
        numberFormatter.numberStyle = .decimal
        numberFormatter.roundingIncrement = 0.2
        let formattedString = numberFormatter.string(from: 4.25)
        XCTAssertEqual(formattedString, "4.2")
    }
    
    func test_formatWidth() {
        let numberFormatter = NumberFormatter()
        numberFormatter.paddingCharacter = "_"
        numberFormatter.formatWidth = 5
        let formattedString = numberFormatter.string(from: 42)
        XCTAssertEqual(formattedString, "___42")
    }
    
    func test_formatPosition() {
        let numberFormatter = NumberFormatter()
        numberFormatter.paddingCharacter = "_"
        numberFormatter.formatWidth = 5
        numberFormatter.paddingPosition = .afterPrefix
        let formattedString = numberFormatter.string(from: -42)
        XCTAssertEqual(formattedString, "-__42")
    }
    
    func test_multiplier() {
        let numberFormatter = NumberFormatter()
        numberFormatter.multiplier = 2
        let formattedString = numberFormatter.string(from: 21)
        XCTAssertEqual(formattedString, "42")
    }
    
    func test_positivePrefix() {
        let numberFormatter = NumberFormatter()
        numberFormatter.positivePrefix = "πŸ‘"
        let formattedString = numberFormatter.string(from: 42)
        XCTAssertEqual(formattedString, "πŸ‘42")
    }
    
    func test_positiveSuffix() {
        let numberFormatter = NumberFormatter()
        numberFormatter.positiveSuffix = "πŸ‘"
        let formattedString = numberFormatter.string(from: 42)
        XCTAssertEqual(formattedString, "42πŸ‘")
    }
    
    func test_negativePrefix() {
        let numberFormatter = NumberFormatter()
        numberFormatter.negativePrefix = "πŸ‘Ž"
        let formattedString = numberFormatter.string(from: -42)
        XCTAssertEqual(formattedString, "πŸ‘Ž42")
    }
    
    func test_negativeSuffix() {
        let numberFormatter = NumberFormatter()
        numberFormatter.negativeSuffix = "πŸ‘Ž"
        let formattedString = numberFormatter.string(from: -42)
        XCTAssertEqual(formattedString, "-42πŸ‘Ž")
    }
    
    func test_internationalCurrencySymbol() {
        // What does internationalCurrencySymbol actually do?
#if false
        let numberFormatter = NumberFormatter()
        numberFormatter.numberStyle = .currencyPlural
        numberFormatter.internationalCurrencySymbol = "πŸ’΅"
        numberFormatter.currencyDecimalSeparator = "_"
        let formattedString = numberFormatter.string(from: 42)
        XCTAssertEqual(formattedString, "πŸ’΅42_00")
#endif
    }
    
    func test_currencyGroupingSeparator() {
        let numberFormatter = NumberFormatter()
        numberFormatter.locale = Locale(identifier: "en_GB")
        numberFormatter.numberStyle = .currency
        numberFormatter.currencyGroupingSeparator = "_"
        numberFormatter.currencyCode = "T"
        numberFormatter.currencyDecimalSeparator = "/"
        let formattedString = numberFormatter.string(from: 42_000)
        XCTAssertEqual(formattedString, "Β£42_000/00")

    }

    func test_lenient() {
        let numberFormatter = NumberFormatter()
        // Not lenient by default
        XCTAssertFalse(numberFormatter.isLenient)

        // Lenient allows wrong style -- not lenient here
        numberFormatter.numberStyle = .spellOut
        XCTAssertEqual(numberFormatter.numberStyle, .spellOut)
//        let nilNumber = numberFormatter.number(from: "2.22")
        // FIXME: Not nil on Linux?
        //XCTAssertNil(nilNumber)
        // Lenient allows wrong style
        numberFormatter.isLenient = true
        XCTAssertTrue(numberFormatter.isLenient)
        let number = numberFormatter.number(from: "2.22")
        XCTAssertEqual(number, 2.22)

        // TODO: Add some tests with currency after [SR-250] resolved
        numberFormatter.numberStyle = .currency
        numberFormatter.isLenient = false
        let nilNumberBeforeLenient = numberFormatter.number(from: "42")

        XCTAssertNil(nilNumberBeforeLenient)
        numberFormatter.isLenient = true
        let numberAfterLenient = numberFormatter.number(from: "42.42")
        XCTAssertEqual(numberAfterLenient, 42.42)
    }
    
    func test_minimumSignificantDigits() {
        let numberFormatter = NumberFormatter()
        numberFormatter.numberStyle = .decimal
        XCTAssertEqual(numberFormatter.maximumSignificantDigits, -1)
        numberFormatter.minimumSignificantDigits = 3
        XCTAssertEqual(numberFormatter.maximumSignificantDigits, 999)
        let formattedString = numberFormatter.string(from: 42)
        XCTAssertEqual(formattedString, "42.0")
    }
    
    func test_maximumSignificantDigits() {
        let numberFormatter = NumberFormatter()
        numberFormatter.numberStyle = .decimal
        var formattedString = numberFormatter.string(from: 987654321)
        XCTAssertEqual(formattedString, "987,654,321")
        
        numberFormatter.usesSignificantDigits = true
        numberFormatter.maximumSignificantDigits = 3
        formattedString = numberFormatter.string(from: 42.42424242)
        XCTAssertEqual(formattedString, "42.4")
    }

    func test_stringFor() {
        let numberFormatter = NumberFormatter()
        XCTAssertEqual(numberFormatter.string(for: 10)!, "10")
        XCTAssertEqual(numberFormatter.string(for: 3.14285714285714)!, "3")
        XCTAssertEqual(numberFormatter.string(for: true)!, "1")
        XCTAssertEqual(numberFormatter.string(for: false)!, "0")
        XCTAssertNil(numberFormatter.string(for: [1,2]))
        XCTAssertEqual(numberFormatter.string(for: NSNumber(value: 99.1))!, "99")
        XCTAssertNil(numberFormatter.string(for: "NaN"))
        XCTAssertNil(numberFormatter.string(for: NSString(string: "NaN")))

        numberFormatter.numberStyle = .spellOut
        XCTAssertEqual(numberFormatter.string(for: 234), "two hundred thirty-four")
        XCTAssertEqual(numberFormatter.string(for: 2007), "two thousand seven")
        XCTAssertEqual(numberFormatter.string(for: 3), "three")
        XCTAssertEqual(numberFormatter.string(for: 0.3), "zero point three")

        numberFormatter.numberStyle = .decimal
        XCTAssertEqual(numberFormatter.string(for: 234.5678), "234.568")
        
        numberFormatter.locale = Locale(identifier: "zh_CN")
        numberFormatter.numberStyle = .spellOut
        XCTAssertEqual(numberFormatter.string(from: 11.4), "十一点四")

        numberFormatter.locale = Locale(identifier: "fr_FR")
        numberFormatter.numberStyle = .spellOut
        XCTAssertEqual(numberFormatter.string(from: 11.4), "onze virgule quatre")

    }

    func test_numberFrom() {
        let numberFormatter = NumberFormatter()
        XCTAssertEqual(numberFormatter.number(from: "10"), 10)
        XCTAssertEqual(numberFormatter.number(from: "3.14"), 3.14)
        XCTAssertEqual(numberFormatter.number(from: "0.01"), 0.01)
        XCTAssertEqual(numberFormatter.number(from: ".01"), 0.01)

        // These don't work unless lenient/style set
        numberFormatter.numberStyle = .decimal
        XCTAssertEqual(numberFormatter.number(from: "1,001"), 1001)
        XCTAssertEqual(numberFormatter.number(from: "1,050,001"), 1050001)

        numberFormatter.numberStyle = .spellOut
        XCTAssertEqual(numberFormatter.number(from: "two thousand and seven"), 2007)
        XCTAssertEqual(numberFormatter.number(from: "one point zero"), 1.0)
        XCTAssertEqual(numberFormatter.number(from: "one hundred million"), 1E8)

        numberFormatter.locale = Locale(identifier: "zh_CN")
        numberFormatter.numberStyle = .spellOut
        XCTAssertEqual(numberFormatter.number(from: "十一点四"), 11.4)

        numberFormatter.locale = Locale(identifier: "fr_FR")
        numberFormatter.numberStyle = .spellOut
        XCTAssertEqual(numberFormatter.number(from: "onze virgule quatre"), 11.4)
    }

    func test_en_US_initialValues() {
        // Symbols should be extractable
        // At one point, none of this passed!

        let numberFormatter = NumberFormatter();
        numberFormatter.locale = Locale(identifier: "en_US")

        // TODO: Check if this is true for all versions...
        XCTAssertEqual(numberFormatter.format, "#########################################0;0;#########################################0")

        XCTAssertEqual(numberFormatter.plusSign, "+")
        XCTAssertEqual(numberFormatter.minusSign, "-")
        XCTAssertEqual(numberFormatter.decimalSeparator, ".")
        XCTAssertEqual(numberFormatter.groupingSeparator, ",")
        XCTAssertEqual(numberFormatter.nilSymbol, "")
        XCTAssertEqual(numberFormatter.notANumberSymbol, "NaN")
        XCTAssertEqual(numberFormatter.positiveInfinitySymbol, "+∞")
        XCTAssertEqual(numberFormatter.negativeInfinitySymbol, "-∞")
        XCTAssertEqual(numberFormatter.positivePrefix, "")
        XCTAssertEqual(numberFormatter.negativePrefix, "-")
        XCTAssertEqual(numberFormatter.positiveSuffix, "")
        XCTAssertEqual(numberFormatter.negativeSuffix, "")
        XCTAssertEqual(numberFormatter.percentSymbol, "%")
        XCTAssertEqual(numberFormatter.perMillSymbol, "‰")
        XCTAssertEqual(numberFormatter.exponentSymbol, "E")
        XCTAssertEqual(numberFormatter.groupingSeparator, ",")
        XCTAssertEqual(numberFormatter.paddingCharacter, " ")
        XCTAssertEqual(numberFormatter.currencyCode, "USD")
        XCTAssertEqual(numberFormatter.currencySymbol, "$")
        XCTAssertEqual(numberFormatter.currencyDecimalSeparator, ".")
        XCTAssertEqual(numberFormatter.currencyGroupingSeparator, ",")
        XCTAssertEqual(numberFormatter.internationalCurrencySymbol, "USD")
        XCTAssertNil(numberFormatter.zeroSymbol)
    }

    func test_pt_BR_initialValues() {
        let numberFormatter = NumberFormatter();
        numberFormatter.locale = Locale(identifier: "pt_BR")

        XCTAssertEqual(numberFormatter.format, "#########################################0;0;#########################################0")
        XCTAssertEqual(numberFormatter.plusSign, "+")
        XCTAssertEqual(numberFormatter.minusSign, "-")
        XCTAssertEqual(numberFormatter.decimalSeparator, ",")
        XCTAssertEqual(numberFormatter.groupingSeparator, ".")
        XCTAssertEqual(numberFormatter.nilSymbol, "")
        XCTAssertEqual(numberFormatter.notANumberSymbol, "NaN")
        XCTAssertEqual(numberFormatter.positiveInfinitySymbol, "+∞")
        XCTAssertEqual(numberFormatter.negativeInfinitySymbol, "-∞")
        XCTAssertEqual(numberFormatter.positivePrefix, "")
        XCTAssertEqual(numberFormatter.negativePrefix, "-")
        XCTAssertEqual(numberFormatter.positiveSuffix, "")
        XCTAssertEqual(numberFormatter.negativeSuffix, "")
        XCTAssertEqual(numberFormatter.percentSymbol, "%")
        XCTAssertEqual(numberFormatter.perMillSymbol, "‰")
        XCTAssertEqual(numberFormatter.exponentSymbol, "E")
        XCTAssertEqual(numberFormatter.groupingSeparator, ".")
        XCTAssertEqual(numberFormatter.paddingCharacter, " ")
        XCTAssertEqual(numberFormatter.currencyCode, "BRL")
        XCTAssertEqual(numberFormatter.currencySymbol, "R$")
        XCTAssertEqual(numberFormatter.currencyDecimalSeparator, ",")
        XCTAssertEqual(numberFormatter.currencyGroupingSeparator, ".")
        XCTAssertEqual(numberFormatter.internationalCurrencySymbol, "BRL")
        XCTAssertNil(numberFormatter.zeroSymbol)
    }

    func test_changingLocale() {
        let numberFormatter = NumberFormatter()
        numberFormatter.locale = Locale(identifier: "fr_FR")

        XCTAssertEqual(numberFormatter.currencyCode, "EUR")
        XCTAssertEqual(numberFormatter.currencySymbol, "€")
        numberFormatter.currencySymbol = "E"
        XCTAssertEqual(numberFormatter.currencySymbol, "E")

        numberFormatter.locale = Locale(identifier: "fr_FR")
        XCTAssertEqual(numberFormatter.currencySymbol, "E")

        numberFormatter.locale = Locale(identifier: "en_GB")

        XCTAssertEqual(numberFormatter.currencyCode, "GBP")
        XCTAssertEqual(numberFormatter.currencySymbol, "E")
        numberFormatter.currencySymbol = nil
        XCTAssertEqual(numberFormatter.currencySymbol, "Β£")
    }

    func test_settingFormat() {
        let formatter = NumberFormatter()

        XCTAssertEqual(formatter.format, "#########################################0;0;#########################################0")
        XCTAssertEqual(formatter.positiveFormat, "#########################################0")
        XCTAssertEqual(formatter.zeroSymbol, nil)
        XCTAssertEqual(formatter.negativeFormat, "#########################################0")

        formatter.positiveFormat = "#"
        XCTAssertEqual(formatter.format, "#;0;0")
        XCTAssertEqual(formatter.positiveFormat, "#")
        XCTAssertEqual(formatter.zeroSymbol, nil)
        XCTAssertEqual(formatter.negativeFormat, "0")

        formatter.positiveFormat = "##.##"
        XCTAssertEqual(formatter.format, "##.##;0;0.##")
        XCTAssertEqual(formatter.positiveFormat, "##.##")
        XCTAssertEqual(formatter.zeroSymbol, nil)
        XCTAssertEqual(formatter.negativeFormat, "0.##")

        formatter.positiveFormat = "##;##"
        XCTAssertEqual(formatter.format, "##;##;0;0")
        XCTAssertEqual(formatter.positiveFormat, "##;##")
        XCTAssertEqual(formatter.zeroSymbol, nil)
        XCTAssertEqual(formatter.negativeFormat, "0")

        formatter.positiveFormat = "+#.#########"
        XCTAssertEqual(formatter.format, "+#.#########;+0;+0.#########")
        XCTAssertEqual(formatter.positiveFormat, "+#.#########")
        XCTAssertEqual(formatter.zeroSymbol, nil)
        XCTAssertEqual(formatter.negativeFormat, "+0.#########")

        formatter.negativeFormat = "-#.#########"
        XCTAssertEqual(formatter.format, "+#.#########;+0;-#.#########")
        XCTAssertEqual(formatter.positiveFormat, "+#.#########")
        XCTAssertEqual(formatter.zeroSymbol, nil)
        XCTAssertEqual(formatter.negativeFormat, "-#.#########")

        formatter.format = "+++#;000;---#.##"
        XCTAssertEqual(formatter.format, "+++#;000;---#.##")
        XCTAssertEqual(formatter.positiveFormat, "+++#")
        XCTAssertEqual(formatter.zeroSymbol, "000")
        XCTAssertEqual(formatter.negativeFormat, "---#.##")

        formatter.positiveFormat = nil
        XCTAssertEqual(formatter.positiveFormat, "0")
        XCTAssertEqual(formatter.format, "0;000;---#.##")

        formatter.zeroSymbol = "00"
        formatter.positiveFormat = "+++#.#"
        XCTAssertEqual(formatter.format, "+++#.#;00;---#.##")
        XCTAssertEqual(formatter.positiveFormat, "+++#.#")
        XCTAssertEqual(formatter.zeroSymbol, "00")
        XCTAssertEqual(formatter.negativeFormat, "---#.##")

        formatter.negativeFormat = "---#.#"
        XCTAssertEqual(formatter.format, "+++#.#;00;---#.#")
        XCTAssertEqual(formatter.positiveFormat, "+++#.#")
        XCTAssertEqual(formatter.zeroSymbol, "00")
        XCTAssertEqual(formatter.negativeFormat, "---#.#")

        // Test setting only first 2 parts
        formatter.format = "+##.##;0.00"
#if !DARWIN_COMPATIBILITY_TESTS
        XCTAssertEqual(formatter.format, "+##.##;00;0.00")
        XCTAssertEqual(formatter.zeroSymbol, "00")
#else
        XCTAssertEqual(formatter.format, "+##.##;+0;0.00")
        XCTAssertEqual(formatter.zeroSymbol, "+0")
#endif
        XCTAssertEqual(formatter.positiveFormat, "+##.##")
        XCTAssertEqual(formatter.negativeFormat, "0.00")

        formatter.format = "+##.##;+0;0.00"
        XCTAssertEqual(formatter.format, "+##.##;+0;0.00")
        XCTAssertEqual(formatter.positiveFormat, "+##.##")
        XCTAssertEqual(formatter.zeroSymbol, "+0")
        XCTAssertEqual(formatter.negativeFormat, "0.00")

        formatter.format = "#;0;#"
        formatter.positiveFormat = "1"
        XCTAssertEqual(formatter.format, "1;0;#")
        XCTAssertEqual(formatter.positiveFormat, "1")
        XCTAssertEqual(formatter.zeroSymbol, "0")
        XCTAssertEqual(formatter.negativeFormat, "#")

        formatter.format = "1"
        XCTAssertEqual(formatter.format, "1;0;-1")
        XCTAssertEqual(formatter.positiveFormat, "1")
        XCTAssertEqual(formatter.zeroSymbol, "0")
        XCTAssertEqual(formatter.negativeFormat, "-1")

        formatter.format = "1;2;3"
        XCTAssertEqual(formatter.format, "1;2;3")
        XCTAssertEqual(formatter.positiveFormat, "1")
        XCTAssertEqual(formatter.zeroSymbol, "2")
        XCTAssertEqual(formatter.negativeFormat, "3")

        formatter.format = ""
        XCTAssertEqual(formatter.format, ";0;-")
        XCTAssertEqual(formatter.zeroSymbol, "0")
        XCTAssertEqual(formatter.positiveFormat, "")
        XCTAssertEqual(formatter.negativeFormat, "-")
    }

    func test_usingFormat() {
        var formatter = NumberFormatter()

        formatter.format = "+++#.#;00;-+-#.#"
        XCTAssertEqual(formatter.string(from: 1), "+++1")
        XCTAssertEqual(formatter.string(from: Int.max as NSNumber), "+++9223372036854775807")
        XCTAssertEqual(formatter.string(from: 0), "00")
        XCTAssertEqual(formatter.string(from: -1), "-+-1")
        XCTAssertEqual(formatter.string(from: Int.min as NSNumber), "-+-9223372036854775808")


        formatter.format = "+#.##;0.00;-#.##"
        XCTAssertEqual(formatter.string(from: 0.5), "+0.5")
        XCTAssertEqual(formatter.string(from: 0), "0.00")
        XCTAssertEqual(formatter.string(from: -0.2), "-0.2")

        formatter.positiveFormat = "#.##"
        formatter.negativeFormat = "-#.##"
        XCTAssertEqual(formatter.string(from: NSNumber(value: Double.pi)), "3.14")
        XCTAssertEqual(formatter.string(from: NSNumber(value: -Double.pi)), "-3.14")

        formatter = NumberFormatter()
        formatter.negativeFormat = "--#.##"
        XCTAssertEqual(formatter.string(from: NSNumber(value: -Double.pi)), "--3")
        formatter.positiveFormat = "#.###"
        XCTAssertEqual(formatter.string(from: NSNumber(value: Double.pi)), "3.142")

        formatter.positiveFormat = "#.####"
        XCTAssertEqual(formatter.string(from: NSNumber(value: Double.pi)), "3.1416")

        formatter.positiveFormat = "#.#####"
        XCTAssertEqual(formatter.string(from: NSNumber(value: Double.pi)), "3.14159")

        formatter = NumberFormatter()
        formatter.positiveFormat = "#.#########"
        formatter.negativeFormat = "#.#########"
        XCTAssertEqual(formatter.string(from: NSNumber(value: 0.5)), "0.5")
        XCTAssertEqual(formatter.string(from: NSNumber(value: -0.5)), "0.5")
        formatter.negativeFormat = "-#.#########"
        XCTAssertEqual(formatter.string(from: NSNumber(value: -0.5)), "-0.5")
    }

    func test_propertyChanges() {
        let formatter = NumberFormatter()
        XCTAssertNil(formatter.multiplier)
        formatter.numberStyle = .percent
        XCTAssertEqual(formatter.multiplier, NSNumber(100))
        formatter.numberStyle = .decimal
        XCTAssertNil(formatter.multiplier)
        formatter.multiplier = NSNumber(1)
        formatter.numberStyle = .percent
        XCTAssertEqual(formatter.multiplier, NSNumber(1))
        formatter.multiplier = NSNumber(27)
        formatter.numberStyle = .decimal
        XCTAssertEqual(formatter.multiplier, NSNumber(27))
    }

    func test_scientificStrings() {
        let formatter: NumberFormatter = NumberFormatter()
        formatter.numberStyle = .scientific
        formatter.positiveInfinitySymbol = ".inf"
        formatter.negativeInfinitySymbol = "-.inf"
        formatter.notANumberSymbol = ".nan"
        XCTAssertEqual(formatter.string(for: Double.infinity), ".inf")
        XCTAssertEqual(formatter.string(for: -1 * Double.infinity), "-.inf")
        XCTAssertEqual(formatter.string(for: Double.nan), ".nan")
#if (arch(i386) || arch(x86_64)) && !(os(Android) || os(Windows))
        XCTAssertNil(formatter.string(for: Float80.infinity))
#endif
    }

    func test_copy() throws {
        let original = NumberFormatter()
        let copied = try XCTUnwrap(original.copy() as? NumberFormatter)
        XCTAssertFalse(original === copied)

        func __assert<T>(_ property: KeyPath<NumberFormatter, T>,
                         original expectedValueOfOriginalFormatter: T,
                         copy expectedValueOfCopiedFormatter: T,
                         file: StaticString = #file,
                         line: UInt = #line) where T: Equatable {
            XCTAssertEqual(original[keyPath: property], expectedValueOfOriginalFormatter,
                           "Unexpected value in `original`.", file: file, line: line)
            XCTAssertEqual(copied[keyPath: property], expectedValueOfCopiedFormatter,
                           "Unexpected value in `copied`.", file: file, line: line)
        }

        copied.numberStyle = .decimal
        __assert(\.numberStyle, original: .none, copy: .decimal)
        __assert(\.maximumIntegerDigits, original: 42, copy: 2_000_000_000)
        __assert(\.maximumFractionDigits, original: 0, copy: 3)
        __assert(\.groupingSize, original: 0, copy: 3)

        original.numberStyle = .percent
        original.percentSymbol = "οΌ…"
        __assert(\.numberStyle, original: .percent, copy: .decimal)
        __assert(\.format, original: "#,##0%;0οΌ…;#,##0%", copy: "#,##0.###;0;#,##0.###")
    }
}