/
NullAwayTest.java
1404 lines (1334 loc) · 49.1 KB
/
NullAwayTest.java
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
/*
* Copyright (c) 2017 Uber Technologies, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.uber.nullaway;
import com.google.errorprone.CompilationTestHelper;
import java.util.Arrays;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Unit tests for {@link com.uber.nullaway.NullAway}. */
@RunWith(JUnit4.class)
@SuppressWarnings("CheckTestExtendsBaseClass")
public class NullAwayTest {
@Rule public final TemporaryFolder temporaryFolder = new TemporaryFolder();
private CompilationTestHelper compilationHelper;
@Before
public void setup() {
compilationHelper = CompilationTestHelper.newInstance(NullAway.class, getClass());
compilationHelper.setArgs(
Arrays.asList(
"-d",
temporaryFolder.getRoot().getAbsolutePath(),
"-XepOpt:NullAway:KnownInitializers="
+ "com.uber.nullaway.testdata.CheckFieldInitNegativeCases.Super.doInit,"
+ "com.uber.nullaway.testdata.CheckFieldInitNegativeCases"
+ ".SuperInterface.doInit2",
"-XepOpt:NullAway:AnnotatedPackages=com.uber,com.ubercab,io.reactivex",
// We give the following in Regexp format to test that support
"-XepOpt:NullAway:UnannotatedSubPackages=com.uber.nullaway.[a-zA-Z0-9.]+.unannotated",
"-XepOpt:NullAway:ExcludedClasses="
+ "com.uber.nullaway.testdata.Shape_Stuff,"
+ "com.uber.nullaway.testdata.excluded",
"-XepOpt:NullAway:ExcludedClassAnnotations=com.uber.nullaway.testdata.TestAnnot",
"-XepOpt:NullAway:CastToNonNullMethod=com.uber.nullaway.testdata.Util.castToNonNull",
"-XepOpt:NullAway:ExternalInitAnnotations=com.uber.ExternalInit",
"-XepOpt:NullAway:ExcludedFieldAnnotations=com.uber.ExternalFieldInit"));
}
@Test
public void coreNullabilityPositiveCases() {
compilationHelper.addSourceFile("NullAwayPositiveCases.java").doTest();
}
@Test
public void nullabilityAnonymousClass() {
compilationHelper.addSourceFile("NullAwayAnonymousClass.java").doTest();
}
@Test
public void coreNullabilityNegativeCases() {
compilationHelper
.addSourceFile("NullAwayNegativeCases.java")
.addSourceFile("OtherStuff.java")
.addSourceFile("TestAnnot.java")
.addSourceFile("unannotated/UnannotatedClass.java")
.doTest();
}
@Test
public void coreNullabilitySkipClass() {
compilationHelper.addSourceFile("Shape_Stuff.java").doTest();
compilationHelper.addSourceFile("excluded/Shape_Stuff2.java").doTest();
compilationHelper.addSourceFile("AnnotatedClass.java").addSourceFile("TestAnnot.java").doTest();
}
@Test
public void skipNestedClass() {
compilationHelper
.setArgs(
Arrays.asList(
"-d",
temporaryFolder.getRoot().getAbsolutePath(),
"-XepOpt:NullAway:AnnotatedPackages=com.uber",
"-XepOpt:NullAway:ExcludedClassAnnotations=com.uber.lib.MyExcluded"))
.addSourceLines(
"Test.java",
"package com.uber;",
"import javax.annotation.Nullable;",
"public class Test {",
" @com.uber.lib.MyExcluded",
" static class Inner {",
" @Nullable",
" static Object foo() {",
" Object x = null; x.toString();",
" return x;",
" }",
" }",
" static void bar() {",
" // BUG: Diagnostic contains: dereferenced expression Inner.foo()",
" Inner.foo().toString();",
" }",
"}")
.doTest();
}
@Test
public void coreNullabilitySkipPackage() {
compilationHelper.addSourceFile("unannotated/UnannotatedClass.java").doTest();
}
@Test
public void coreNullabilityNativeModels() {
compilationHelper
.addSourceFile("NullAwayNativeModels.java")
.addSourceFile("androidstubs/WebView.java")
.addSourceFile("androidstubs/TextUtils.java")
.doTest();
}
@Test
public void initFieldPositiveCases() {
compilationHelper.addSourceFile("CheckFieldInitPositiveCases.java").doTest();
}
@Test
public void initFieldNegativeCases() {
compilationHelper.addSourceFile("CheckFieldInitNegativeCases.java").doTest();
}
@Test
public void assertSupportPositiveCases() {
compilationHelper.addSourceFile("CheckAssertSupportPositiveCases.java").doTest();
}
@Test
public void assertSupportNegativeCases() {
compilationHelper
.setArgs(
Arrays.asList(
"-d",
temporaryFolder.getRoot().getAbsolutePath(),
"-XepOpt:NullAway:AnnotatedPackages=com.uber",
"-XepOpt:NullAway:AssertsEnabled=true"))
.addSourceFile("CheckAssertSupportNegativeCases.java")
.doTest();
}
@Test
public void java8PositiveCases() {
compilationHelper.addSourceFile("NullAwayJava8PositiveCases.java").doTest();
}
@Test
public void java8NegativeCases() {
compilationHelper.addSourceFile("NullAwayJava8NegativeCases.java").doTest();
}
@Test
public void rxSupportPositiveCases() {
compilationHelper.addSourceFile("NullAwayRxSupportPositiveCases.java").doTest();
}
@Test
public void rxSupportNegativeCases() {
compilationHelper.addSourceFile("NullAwayRxSupportNegativeCases.java").doTest();
}
@Test
public void functionalMethodSuperInterface() {
compilationHelper.addSourceFile("NullAwaySuperFunctionalInterface.java").doTest();
}
@Test
public void functionalMethodOverrideSuperInterface() {
compilationHelper.addSourceFile("NullAwayOverrideFunctionalInterfaces.java").doTest();
}
@Test
public void readBeforeInitPositiveCases() {
compilationHelper
.addSourceFile("ReadBeforeInitPositiveCases.java")
.addSourceFile("Util.java")
.doTest();
}
@Test
public void readBeforeInitNegativeCases() {
compilationHelper
.addSourceFile("ReadBeforeInitNegativeCases.java")
.addSourceFile("Util.java")
.doTest();
}
@Test
public void tryFinallySupport() {
compilationHelper.addSourceFile("NullAwayTryFinallyCases.java").doTest();
}
@Test
public void externalInitSupport() {
compilationHelper
.addSourceLines(
"ExternalInit.java",
"package com.uber;",
"@java.lang.annotation.Retention(java.lang.annotation.RetentionPolicy.CLASS)",
"public @interface ExternalInit {}")
.addSourceLines(
"Test.java",
"package com.uber;",
"@ExternalInit",
"class Test {",
" Object f;",
// no error here due to external init
" public Test() {}",
" // BUG: Diagnostic contains: initializer method does not guarantee @NonNull field",
" public Test(int x) {}",
"}")
.addSourceLines(
"Test2.java",
"package com.uber;",
"@ExternalInit",
"class Test2 {",
// no error here due to external init
" Object f;",
"}")
.addSourceLines(
"Test3.java",
"package com.uber;",
"@ExternalInit",
"class Test3 {",
" Object f;",
" // BUG: Diagnostic contains: initializer method does not guarantee @NonNull field",
" public Test3(int x) {}",
"}")
.doTest();
}
@Test
public void externalInitexternalInitSupportFields() {
compilationHelper
.addSourceLines(
"ExternalFieldInit.java",
"package com.uber;",
"@java.lang.annotation.Retention(java.lang.annotation.RetentionPolicy.CLASS)",
"public @interface ExternalFieldInit {}")
.addSourceLines(
"Test.java",
"package com.uber;",
"class Test {",
" @ExternalFieldInit Object f;",
// no error here due to external init
" public Test() {}",
// no error here due to external init
" public Test(int x) {}",
"}")
.addSourceLines(
"Test2.java",
"package com.uber;",
"class Test2 {",
// no error here due to external init
" @ExternalFieldInit Object f;",
"}")
.addSourceLines(
"Test3.java",
"package com.uber;",
"class Test3 {",
" @ExternalFieldInit Object f;",
// no error here due to external init
" @ExternalFieldInit", // See GitHub#184
" public Test3() {}",
// no error here due to external init
" @ExternalFieldInit", // See GitHub#184
" public Test3(int x) {}",
"}")
.doTest();
}
@Test
public void generatedAsUnannotated() {
String generatedAnnot =
(Double.parseDouble(System.getProperty("java.specification.version")) >= 11)
? "@javax.annotation.processing.Generated"
: "@javax.annotation.Generated";
System.err.println();
compilationHelper
.setArgs(
Arrays.asList(
"-d",
temporaryFolder.getRoot().getAbsolutePath(),
"-XepOpt:NullAway:AnnotatedPackages=com.uber",
"-XepOpt:NullAway:TreatGeneratedAsUnannotated=true"))
.addSourceLines(
"Generated.java",
"package com.uber;",
generatedAnnot + "(\"foo\")",
"public class Generated { public void takeObj(Object o) {} }")
.addSourceLines(
"Test.java",
"package com.uber;",
"class Test {",
" void foo() { (new Generated()).takeObj(null); }",
"}")
.doTest();
}
@Test
public void generatedAsUnannotatedPlusRestrictive() {
String generatedAnnot =
(Double.parseDouble(System.getProperty("java.specification.version")) >= 11)
? "@javax.annotation.processing.Generated"
: "@javax.annotation.Generated";
compilationHelper
.setArgs(
Arrays.asList(
"-d",
temporaryFolder.getRoot().getAbsolutePath(),
"-XepOpt:NullAway:AnnotatedPackages=com.uber",
"-XepOpt:NullAway:TreatGeneratedAsUnannotated=true",
"-XepOpt:NullAway:AcknowledgeRestrictiveAnnotations=true"))
.addSourceLines(
"Generated.java",
"package com.uber;",
generatedAnnot + "(\"foo\")",
"public class Generated {",
" @javax.annotation.Nullable",
" public Object retNull() {",
" return null;",
" }",
"}")
.addSourceLines(
"Test.java",
"package com.uber;",
"class Test {",
" void foo() { (new Generated()).retNull().toString(); }",
"}")
.doTest();
}
@Test
public void basicContractAnnotation() {
compilationHelper
.setArgs(
Arrays.asList(
"-d",
temporaryFolder.getRoot().getAbsolutePath(),
"-XepOpt:NullAway:AnnotatedPackages=com.uber"))
.addSourceLines(
"NullnessChecker.java",
"package com.uber;",
"import javax.annotation.Nullable;",
"import org.jetbrains.annotations.Contract;",
"public class NullnessChecker {",
" @Contract(\"_, null -> true\")",
" static boolean isNull(boolean flag, @Nullable Object o) { return o == null; }",
" @Contract(\"null -> false\")",
" static boolean isNonNull(@Nullable Object o) { return o != null; }",
" @Contract(\"null -> fail\")",
" static void assertNonNull(@Nullable Object o) { if (o != null) throw new Error(); }",
"}")
.addSourceLines(
"Test.java",
"package com.uber;",
"import javax.annotation.Nullable;",
"class Test {",
" String test1(@Nullable Object o) {",
" return NullnessChecker.isNonNull(o) ? o.toString() : \"null\";",
" }",
" String test2(@Nullable Object o) {",
" return NullnessChecker.isNull(false, o) ? \"null\" : o.toString();",
" }",
" String test3(@Nullable Object o) {",
" NullnessChecker.assertNonNull(o);",
" return o.toString();",
" }",
"}")
.doTest();
}
@Test
public void impliesNonNullContractAnnotation() {
compilationHelper
.setArgs(
Arrays.asList(
"-d",
temporaryFolder.getRoot().getAbsolutePath(),
"-XepOpt:NullAway:AnnotatedPackages=com.uber"))
.addSourceLines(
"NullnessChecker.java",
"package com.uber;",
"import javax.annotation.Nullable;",
"import org.jetbrains.annotations.Contract;",
"public class NullnessChecker {",
" @Contract(\"!null -> !null\")",
" static @Nullable Object noOp(@Nullable Object o) { return o; }",
"}")
.addSourceLines(
"Test.java",
"package com.uber;",
"import javax.annotation.Nullable;",
"class Test {",
" String test1(@Nullable Object o1) {",
" // BUG: Diagnostic contains: dereferenced expression",
" return NullnessChecker.noOp(o1).toString();",
" }",
" String test2(Object o2) {",
" return NullnessChecker.noOp(o2).toString();",
" }",
"}")
.doTest();
}
@Test
public void malformedContractAnnotations() {
compilationHelper
.setArgs(
Arrays.asList(
"-d",
temporaryFolder.getRoot().getAbsolutePath(),
"-XepOpt:NullAway:AnnotatedPackages=com.uber"))
.addSourceLines(
"Test.java",
"package com.uber;",
"import javax.annotation.Nullable;",
"import org.jetbrains.annotations.Contract;",
"class Test {",
" @Contract(\"!null -> -> !null\")",
" static @Nullable Object foo(@Nullable Object o) { return o; }",
" @Contract(\"!null -> !null\")",
" static @Nullable Object bar(@Nullable Object o, String s) { return o; }",
" @Contract(\"jabberwocky -> !null\")",
" static @Nullable Object baz(@Nullable Object o) { return o; }",
// We don't care as long as nobody calls the method:
" @Contract(\"!null -> -> !null\")",
" static @Nullable Object dontcare(@Nullable Object o) { return o; }",
" static Object test1() {",
" // BUG: Diagnostic contains: Invalid @Contract annotation",
" return foo(null);",
" }",
" static Object test2() {",
" // BUG: Diagnostic contains: Invalid @Contract annotation",
" return bar(null, \"\");",
" }",
" static Object test3() {",
" // BUG: Diagnostic contains: Invalid @Contract annotation",
" return baz(null);",
" }",
"}")
.doTest();
}
@Test
public void contractNonVarArg() {
compilationHelper
.setArgs(
Arrays.asList(
"-d",
temporaryFolder.getRoot().getAbsolutePath(),
"-XepOpt:NullAway:AnnotatedPackages=com.uber"))
.addSourceLines(
"NullnessChecker.java",
"package com.uber;",
"import javax.annotation.Nullable;",
"import org.jetbrains.annotations.Contract;",
"public class NullnessChecker {",
" @Contract(\"null -> fail\")",
" static void assertNonNull(@Nullable Object o) { if (o != null) throw new Error(); }",
"}")
.addSourceLines(
"Test.java",
"package com.uber;",
"import javax.annotation.Nullable;",
"class Test {",
" void test(java.util.function.Function<Object, Object> fun) {",
" NullnessChecker.assertNonNull(fun.apply(new Object()));",
" }",
"}")
.doTest();
}
@Test
public void testEnumInit() {
compilationHelper
.addSourceLines(
"SomeEnum.java",
"package com.uber;",
"import java.util.Random;",
"enum SomeEnum {",
" FOO, BAR;",
" final Object o;",
" final Object p;",
" private SomeEnum() {",
" this.o = new Object();",
" this.p = new Object();",
" this.o.equals(this.p);",
" }",
"}")
.doTest();
}
@Test
public void testGenericAnonymousInner() {
compilationHelper
.addSourceLines(
"GenericSuper.java",
"package com.uber;",
"class GenericSuper<T> {",
" T x;",
" GenericSuper(T y) {",
" this.x = y;",
" }",
"}")
.addSourceLines(
"AnonSub.java",
"package com.uber;",
"import java.util.List;",
"import javax.annotation.Nullable;",
"class AnonSub {",
" static GenericSuper<List<String>> makeSuper(List<String> list) {",
" return new GenericSuper<List<String>>(list) {};",
" }",
" static GenericSuper<List<String>> makeSuperBad(@Nullable List<String> list) {",
" // BUG: Diagnostic contains: passing @Nullable parameter 'list' where @NonNull",
" return new GenericSuper<List<String>>(list) {};",
" }",
"}")
.doTest();
}
@Test
public void testThriftIsSet() {
compilationHelper
.addSourceLines("TBase.java", "package org.apache.thrift;", "public interface TBase {}")
.addSourceLines(
"Generated.java",
"package com.uber;",
"import javax.annotation.Nullable;",
"public class Generated implements org.apache.thrift.TBase {",
" public @Nullable Object id;",
" public boolean isFixed;",
" @Nullable public Object getId() { return this.id; }",
" // this is to ensure we don't crash on unions",
" public boolean isSet() { return false; }",
" public boolean isSetId() { return this.id != null; }",
" public boolean isFixed() { return this.isFixed; }",
" public boolean isSetIsFixed() { return false; }",
"}")
.addSourceLines(
"Client.java",
"package com.uber;",
"public class Client {",
" public void testNeg(Generated g) {",
" if (g.isSetId()) {",
" g.getId().toString();",
" g.id.hashCode();",
" }",
" if (g.isSetIsFixed()) {",
" g.isFixed();",
" }",
" if (g.isSet()) {}",
" }",
" public void testPos(Generated g) {",
" if (!g.isSetId()) {",
" // BUG: Diagnostic contains: dereferenced expression g.getId() is @Nullable",
" g.getId().hashCode();",
" } else {",
" g.id.toString();",
" }",
" java.util.List<Generated> l = new java.util.ArrayList<>();",
" if (l.get(0).isSetId()) {",
" // BUG: Diagnostic contains: dereferenced expression l.get(0).getId()",
" l.get(0).getId().hashCode();",
" }",
" }",
"}")
.doTest();
}
@Test
public void testThriftIsSetWithGenerics() {
compilationHelper
.addSourceLines(
"TBase.java", "package org.apache.thrift;", "public interface TBase<T, F> {}")
.addSourceLines(
"Generated.java",
"package com.uber;",
"import javax.annotation.Nullable;",
"public class Generated implements org.apache.thrift.TBase<String, Integer> {",
" public @Nullable Object id;",
" @Nullable public Object getId() { return this.id; }",
" public boolean isSetId() { return this.id != null; }",
"}")
.addSourceLines(
"Client.java",
"package com.uber;",
"public class Client {",
" public void testNeg(Generated g) {",
" if (!g.isSetId()) {",
" return;",
" }",
" Object x = g.getId();",
" if (x.toString() == null) return;",
" g.getId().toString();",
" g.id.hashCode();",
" }",
"}")
.doTest();
}
@Test
public void testThriftIsSetWithArg() {
compilationHelper
.addSourceLines(
"TBase.java",
"package org.apache.thrift;",
"public interface TBase {",
" boolean isSet(String fieldName);",
"}")
.addSourceLines(
"Client.java",
"package com.uber;",
"public class Client {",
" public void testNeg(org.apache.thrift.TBase tBase) {",
" if (tBase.isSet(\"Hello\")) {",
" System.out.println(\"set\");",
" }",
" }",
"}")
.doTest();
}
/** we do not have proper support for Thrift unions yet; just checks that we don't crash */
@Test
public void testThriftUnion() {
compilationHelper
.addSourceLines(
"TBase.java", "package org.apache.thrift;", "public interface TBase<T, F> {}")
.addSourceLines(
"TUnion.java",
"package org.apache.thrift;",
"public abstract class TUnion<T, F> implements TBase<T, F> {",
" protected Object value_;",
" public Object getFieldValue() {",
" return this.value_;",
" }",
"}")
.addSourceLines(
"Generated.java",
"package com.uber;",
"import javax.annotation.Nullable;",
"public class Generated extends org.apache.thrift.TUnion<String, Integer> {",
" public Object getId() { return getFieldValue(); }",
" public boolean isSetId() { return true; }",
"}")
.addSourceLines(
"Client.java",
"package com.uber;",
"public class Client {",
" public void testNeg(Generated g) {",
" if (!g.isSetId()) {",
" return;",
" }",
" Object x = g.getId();",
" if (x.toString() == null) return;",
" }",
"}")
.doTest();
}
@Test
public void erasedIterator() {
// just checking for crash
compilationHelper
.addSourceLines(
"Test.java",
"package com.uber;",
"import java.util.*;",
"class Test {",
" static class Foo implements Iterable {",
" public Iterator iterator() {",
" return new Iterator() {",
" @Override",
" public boolean hasNext() {",
" return false;",
" }",
" @Override",
" public Iterator next() {",
" throw new NoSuchElementException();",
" }",
" };",
" }",
" }",
" static void testErasedIterator(Foo foo) {",
" for (Object x : foo) {",
" x.hashCode();",
" }",
" }",
"}")
.doTest();
}
@Test
public void compoundAssignment() {
compilationHelper
.addSourceLines(
"Test.java",
"package com.uber;",
"class Test {",
" static void assignments() {",
" String x = null; x += \"hello\";",
" // BUG: Diagnostic contains: unboxing of a @Nullable value",
" Integer y = null; y += 3;",
" // BUG: Diagnostic contains: unboxing of a @Nullable value",
" boolean b = false; Boolean c = null; b |= c;",
" }",
" static Integer returnCompound() {",
" Integer z = 7;",
" return (z += 10);",
" }",
"}")
.doTest();
}
@Test
public void arrayIndexUnbox() {
compilationHelper
.addSourceLines(
"Test.java",
"package com.uber;",
"class Test {",
" static void indexUnbox() {",
" Integer x = null; int[] fizz = { 0, 1 };",
" // BUG: Diagnostic contains: unboxing of a @Nullable value",
" int y = fizz[x];",
" }",
"}")
.doTest();
}
@Test
public void unannotatedClass() {
compilationHelper
.setArgs(
Arrays.asList(
"-d",
temporaryFolder.getRoot().getAbsolutePath(),
"-XepOpt:NullAway:AnnotatedPackages=com.uber",
"-XepOpt:NullAway:UnannotatedClasses=com.uber.UnAnnot"))
.addSourceLines(
"UnAnnot.java",
"package com.uber;",
"import javax.annotation.Nullable;",
"public class UnAnnot {",
" @Nullable static Object retNull() { return null; }",
"}")
.addSourceLines(
"Test.java",
"package com.uber;",
"import javax.annotation.Nullable;",
"class Test {",
" @Nullable static Object nullRetSameClass() { return null; }",
" void test() {",
" UnAnnot.retNull().toString();",
// make sure other classes in the package still get analyzed
" Object x = nullRetSameClass();",
" // BUG: Diagnostic contains: dereferenced expression x is @Nullable",
" x.hashCode();",
" }",
"}")
.doTest();
}
@Test
public void cfNullableArrayField() {
compilationHelper
.addSourceLines(
"CFNullable.java",
"package com.uber;",
"import org.checkerframework.checker.nullness.qual.Nullable;",
"import java.util.List;",
"abstract class CFNullable<E> {",
" List<E> @Nullable [] table;",
"}")
.doTest();
}
@Test
public void typeUseJarReturn() {
compilationHelper
.addSourceLines(
"Test.java",
"package com.uber;",
"import com.uber.lib.*;",
"class Test {",
" void foo(CFNullableStuff.NullableReturn r) {",
" // BUG: Diagnostic contains: dereferenced expression",
" r.get().toString();",
" }",
"}")
.doTest();
}
@Test
public void typeUseJarParam() {
compilationHelper
.addSourceLines(
"Test.java",
"package com.uber;",
"import com.uber.lib.*;",
"class Test {",
" void foo(CFNullableStuff.NullableParam p) {",
" p.doSomething(null);",
" // BUG: Diagnostic contains: passing @Nullable parameter",
" p.doSomething2(null, new Object());",
" p.doSomething2(new Object(), null);",
" }",
"}")
.doTest();
}
@Test
public void typeUseJarField() {
compilationHelper
.addSourceLines(
"Test.java",
"package com.uber;",
"import com.uber.lib.*;",
"class Test {",
" void foo(CFNullableStuff c) {",
" // BUG: Diagnostic contains: dereferenced expression c.f",
" c.f.toString();",
" }",
"}")
.doTest();
}
@Test
public void typeUseJarOverride() {
compilationHelper
.addSourceLines(
"Test.java",
"package com.uber;",
"import com.uber.lib.*;",
"import org.checkerframework.checker.nullness.qual.Nullable;",
"class Test {",
" class Test1 implements CFNullableStuff.NullableReturn {",
" public @Nullable Object get() { return null; }",
" }",
" class Test2 implements CFNullableStuff.NullableParam {",
" // BUG: Diagnostic contains: parameter o is @NonNull",
" public void doSomething(Object o) {}",
" // BUG: Diagnostic contains: parameter p is @NonNull",
" public void doSomething2(Object o, Object p) {}",
" }",
" class Test3 implements CFNullableStuff.NullableParam {",
" public void doSomething(@Nullable Object o) {}",
" public void doSomething2(Object o, @Nullable Object p) {}",
" }",
"}")
.doTest();
}
@Test
public void tryWithResourcesSupport() {
compilationHelper
.addSourceLines(
"Test.java",
"package com.uber;",
"import javax.annotation.Nullable;",
"import java.io.BufferedReader;",
"import java.io.FileReader;",
"import java.io.IOException;",
"class Test {",
" String foo(String path, @Nullable String s, @Nullable Object o) throws IOException {",
" try (BufferedReader br = new BufferedReader(new FileReader(path))) {",
" // Code inside try-resource gets analyzed",
" // BUG: Diagnostic contains: dereferenced expression",
" o.toString();",
" s = br.readLine();",
" return s;",
" }",
" }",
"}")
.doTest();
}
@Test
public void tryWithResourcesSupportInit() {
compilationHelper
.addSourceLines(
"Test.java",
"package com.uber;",
"import javax.annotation.Nullable;",
"import java.io.BufferedReader;",
"import java.io.FileReader;",
"import java.io.IOException;",
"class Test {",
" private String path;",
" private String f;",
" Test(String p) throws IOException {",
" path = p;",
" try (BufferedReader br = new BufferedReader(new FileReader(path))) {",
" f = br.readLine();",
" }",
" }",
"}")
.doTest();
}
@Test
public void tryFinallySupportInit() {
compilationHelper
.addSourceLines(
"Test.java",
"package com.uber;",
"import javax.annotation.Nullable;",
"import java.io.BufferedReader;",
"import java.io.FileReader;",
"import java.io.IOException;",
"class Test {",
" private String path;",
" private String f;",
" Test(String p) throws IOException {",
" path = p;",
" try {",
" BufferedReader br = new BufferedReader(new FileReader(path));",
" f = br.readLine();",
" } finally {",
" f = \"DEFAULT\";",
" }",
" }",
"}")
.doTest();
}
@Test
public void supportObjectsIsNull() {
compilationHelper
.addSourceLines(
"Test.java",
"package com.uber;",
"import java.util.Objects;",
"import javax.annotation.Nullable;",
"class Test {",
" private void foo(@Nullable String s) {",
" if (!Objects.isNull(s)) {",
" s.toString();",
" }",
" }",
"}")
.doTest();
}
@Test
public void defaultPermissiveOnUnannotated() {
compilationHelper
.setArgs(
Arrays.asList(
"-d",
temporaryFolder.getRoot().getAbsolutePath(),
"-XepOpt:NullAway:AnnotatedPackages=com.uber",
"-XepOpt:NullAway:UnannotatedSubPackages=com.uber.lib.unannotated",
"-XepOpt:NullAway:AcknowledgeRestrictiveAnnotations=false"))
.addSourceLines(
"Test.java",
"package com.uber;",
"import javax.annotation.Nullable;",
"import com.uber.lib.unannotated.RestrictivelyAnnotatedClass;",
"class Test {",
" Object test() {",
" // Assume methods take @Nullable, even if annotated otherwise",
" RestrictivelyAnnotatedClass.consumesObjectUnannotated(null);",
" RestrictivelyAnnotatedClass.consumesObjectNonNull(null);",
" // Ignore explict @Nullable return",
" return RestrictivelyAnnotatedClass.returnsNull();",
" }",
"}")
.doTest();
}
@Test
public void acknowledgeRestrictiveAnnotationsWhenFlagSet() {
compilationHelper
.setArgs(