-
Notifications
You must be signed in to change notification settings - Fork 13
/
container_test.go
1634 lines (1512 loc) · 52.1 KB
/
container_test.go
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
package di_test
import (
"errors"
"fmt"
"io"
"net"
"net/http"
"os"
"testing"
"github.com/stretchr/testify/require"
"github.com/defval/di"
)
func init() {
di.SetTracer(di.StdTracer{})
}
func TestContainer_Provide(t *testing.T) {
t.Run("simple constructor", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NoError(t, c.Provide(func() *http.Server { return &http.Server{} }))
})
t.Run("constructor with cleanup function", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NoError(t, c.Provide(func() (*http.Server, func()) {
return &http.Server{}, func() {}
}))
})
t.Run("constructor with cleanup and error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NoError(t, c.Provide(func() (*http.Server, func(), error) {
return &http.Server{}, func() {}, nil
}))
})
t.Run("provide string cause error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
err = c.Provide("string")
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": invalid constructor signature, got string")
})
t.Run("provide nil cause error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
err = c.Provide(nil)
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": invalid constructor signature, got nil")
})
t.Run("provide struct pointer cause error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
err = c.Provide(&http.Server{})
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": invalid constructor signature, got *http.Server")
})
t.Run("provide constructor without result cause error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
err = c.Provide(func() {})
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": invalid constructor signature, got func()")
})
t.Run("provide constructor with many resultant types cause error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
ctor := func() (*http.Server, *http.ServeMux, error) {
return nil, nil, nil
}
err = c.Provide(ctor)
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": invalid constructor signature, got func() (*http.Server, *http.ServeMux, error)")
})
t.Run("provide constructor with incorrect result error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
ctor := func() (*http.Server, *http.ServeMux) {
return nil, nil
}
err = c.Provide(ctor)
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), "invalid constructor signature, got func() (*http.Server, *http.ServeMux)")
})
t.Run("provide duplicate not cause error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
ctor := func() *http.Server { return nil }
require.NoError(t, c.Provide(ctor))
require.NoError(t, c.Provide(ctor))
})
t.Run("provide as not implemented interface cause error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
// http server not implement io.Reader interface
err = c.Provide(func() *http.Server { return nil }, di.As(new(io.Reader)))
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": *http.Server not implement io.Reader")
})
t.Run("provide type as several interfaces", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
file := &os.File{}
require.NoError(t, c.Provide(func() *os.File { return file }, di.As(new(io.Closer), new(io.ReadCloser))))
var closer io.Closer
var readCloser io.ReadCloser
require.NoError(t, c.Resolve(&closer))
require.NoError(t, c.Resolve(&readCloser))
require.Equal(t, fmt.Sprintf("%p", closer), fmt.Sprintf("%p", file))
require.Equal(t, fmt.Sprintf("%p", readCloser), fmt.Sprintf("%p", file))
})
t.Run("using not interface type in di.As() cause error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
err = c.Provide(func() *http.Server { return nil }, di.As(&http.Server{}))
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": *http.Server: not a pointer to interface")
})
t.Run("using nil type in di.As() cause error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
err = c.Provide(func() *http.Server { return &http.Server{} }, di.As(nil))
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": nil: not a pointer to interface")
})
}
func TestContainer_ProvideValue(t *testing.T) {
t.Run("provide nil value cause error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
err = c.ProvideValue(nil)
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), "invalid value, got nil")
})
t.Run("provide and resolve value", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
mux := &http.ServeMux{}
err = c.ProvideValue(mux, di.As(new(http.Handler)))
require.NoError(t, err)
err = c.Provide(func(handler http.Handler) *http.Server {
return &http.Server{
Handler: handler,
}
})
require.NoError(t, err)
var server *http.Server
err = c.Resolve(&server)
require.NoError(t, err)
require.Equal(t, fmt.Sprintf("%p", mux), fmt.Sprintf("%p", server.Handler))
})
t.Run("provide values by option", func(t *testing.T) {
mux := &http.ServeMux{}
c, err := di.New(
di.ProvideValue(mux),
)
require.NoError(t, err)
require.NotNil(t, c)
var result *http.ServeMux
err = c.Resolve(&result)
require.NoError(t, err)
require.Equal(t, fmt.Sprintf("%p", mux), fmt.Sprintf("%p", result))
})
t.Run("provide nil value by option", func(t *testing.T) {
c, err := di.New(
di.ProvideValue(nil),
)
require.Error(t, err)
require.Nil(t, c)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), "invalid value, got nil")
})
}
func TestContainer_Resolve(t *testing.T) {
t.Run("resolve into nil cause error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
err = c.Resolve(nil)
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": target must be a pointer, got nil")
})
t.Run("resolve into struct{} cause error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
err = c.Resolve(struct{}{})
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": target must be a pointer, got struct {}")
})
t.Run("resolve into string cause error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
err = c.Resolve("string")
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": target must be a pointer, got string")
})
t.Run("resolve with failed build", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
err = c.Provide(func() (*http.Server, error) {
return &http.Server{}, fmt.Errorf("server build failed")
})
require.NoError(t, err)
var server *http.Server
err = c.Resolve(&server)
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": *http.Server: server build failed")
})
t.Run("resolve with failed dependency build", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
err = c.Provide(func() (*http.Server, error) {
return &http.Server{}, fmt.Errorf("server build failed")
})
require.NoError(t, err)
err = c.Provide(func(server *http.Server) string {
return "string"
})
require.NoError(t, err)
var s string
err = c.Resolve(&s)
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": *http.Server: server build failed")
})
t.Run("resolve cleanup error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
called := false
cleanup := func() {
called = true
}
require.NoError(t, c.Provide(func() (*http.Server, func(), error) {
return &http.Server{}, cleanup, nil
}))
var server *http.Server
require.NoError(t, c.Resolve(&server))
c.Cleanup()
require.True(t, called)
})
t.Run("resolve returns type that was created in constructor", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
server := &http.Server{}
require.NoError(t, c.Provide(func() *http.Server { return server }))
var extracted *http.Server
require.NoError(t, c.Resolve(&extracted))
require.Equal(t, fmt.Sprintf("%p", server), fmt.Sprintf("%p", extracted))
})
t.Run("resolve same pointer on each resolve", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
require.NoError(t, c.Provide(func() *http.Server { return &http.Server{} }))
var server1 *http.Server
require.NoError(t, c.Resolve(&server1))
var server2 *http.Server
require.NoError(t, c.Resolve(&server2))
require.Equal(t, fmt.Sprintf("%p", server1), fmt.Sprintf("%p", server2))
})
t.Run("resolve not existing dependency cause error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
err = c.Provide(func(handler http.Handler) *http.Server { return &http.Server{} })
require.NoError(t, err)
var server *http.Server
err = c.Resolve(&server)
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), "*http.Server: type http.Handler not exists in the container")
})
t.Run("resolve not existing type cause error", func(t *testing.T) {
c, err := di.New()
require.NotNil(t, c)
require.NoError(t, err)
err = c.Resolve(&http.Server{})
require.Error(t, err)
require.True(t, errors.Is(err, di.ErrTypeNotExists))
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": type http.Server not exists in the container")
})
t.Run("resolve functions", func(t *testing.T) {
var result []string
fn1 := func() { result = append(result, "fn1") }
fn2 := func() { result = append(result, "fn2") }
fn3 := func() { result = append(result, "fn3") }
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
type MyFunc func()
require.NoError(t, c.Provide(func() MyFunc { return fn1 }))
require.NoError(t, c.Provide(func() MyFunc { return fn2 }))
require.NoError(t, c.Provide(func() MyFunc { return fn3 }))
var funcs []MyFunc
require.NoError(t, c.Resolve(&funcs))
require.Len(t, funcs, 3)
for _, fn := range funcs {
fn()
}
require.Equal(t, []string{"fn1", "fn2", "fn3"}, result)
})
t.Run("container provided by default", func(t *testing.T) {
var container *di.Container
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
require.NoError(t, c.Resolve(&container))
require.Equal(t, fmt.Sprintf("%p", c), fmt.Sprintf("%p", container))
})
t.Run("cycle cause error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
// bool -> int32 -> int64 -> bool
err = c.Provide(func(int32) bool { return true })
require.NoError(t, err)
err = c.Provide(func(int64) int32 { return 0 })
require.NoError(t, err)
err = c.Provide(func(bool) int64 { return 0 })
require.NoError(t, err)
var b bool
err = c.Resolve(&b)
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": cycle detected") // todo: improve message
})
//t.Run("first resolve checks graph correctness", func(t *testing.T) {
// c, err := di.New()
// require.NoError(t, err)
// err = c.Provide(func(handler http.Handler) *http.Server { return &http.Server{Handler: handler} })
// require.NoError(t, err)
// err = c.Provide(func() string { return "" })
// require.NoError(t, err)
// var s string
// err = c.Resolve(&s)
// require.EqualError(t, err, "")
//})
t.Run("resolve not existing dependency type cause error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
require.NoError(t, c.Provide(func(int) int32 { return 0 }))
var i int32
err = c.Resolve(&i)
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": int32: type int not exists in the container")
})
t.Run("resolve correct argument", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
mux := &http.ServeMux{}
require.NoError(t, c.Provide(func() *http.ServeMux { return mux }))
require.NoError(t, c.Provide(func(mux *http.ServeMux) *http.Server {
return &http.Server{Handler: mux}
}))
var server *http.Server
require.NoError(t, c.Resolve(&server))
require.Equal(t, fmt.Sprintf("%p", mux), fmt.Sprintf("%p", server.Handler))
})
}
func TestContainer_Decorate(t *testing.T) {
t.Run("decorate provide", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
executed := false
server := &http.Server{}
decorator := func(value di.Value) error {
require.Equal(t, fmt.Sprintf("%p", server), fmt.Sprintf("%p", value))
executed = true
return nil
}
err = c.Provide(func() *http.Server { return server }, di.Decorate(decorator))
require.NoError(t, err)
require.False(t, executed)
var result *http.Server
err = c.Resolve(&result)
require.NoError(t, err)
require.True(t, executed)
})
t.Run("decorate provide value", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
executed := false
server := &http.Server{}
err = c.ProvideValue(server, di.Decorate(func(value di.Value) error {
require.Equal(t, fmt.Sprintf("%p", server), fmt.Sprintf("%p", value))
executed = true
return nil
}))
require.NoError(t, err)
require.False(t, executed)
var result *http.Server
err = c.Resolve(&result)
require.NoError(t, err)
require.True(t, executed)
})
t.Run("decorate error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
executed := false
server := &http.Server{}
err = c.ProvideValue(server, di.Decorate(func(value di.Value) error {
require.Equal(t, fmt.Sprintf("%p", server), fmt.Sprintf("%p", value))
executed = true
return errors.New("decorate error")
}))
require.NoError(t, err)
require.False(t, executed)
var result *http.Server
err = c.Resolve(&result)
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go")
require.Contains(t, err.Error(), ": *http.Server: decorate error")
require.True(t, executed)
})
t.Run("decorate group", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
executed1 := 0
executed2 := 0
server1 := &http.Server{}
server2 := &http.Server{}
err = c.ProvideValue(server1, di.Decorate(func(value di.Value) error {
require.Equal(t, fmt.Sprintf("%p", server1), fmt.Sprintf("%p", value))
executed1++
return nil
}))
require.NoError(t, err)
err = c.ProvideValue(server2, di.Decorate(func(value di.Value) error {
require.Equal(t, fmt.Sprintf("%p", server2), fmt.Sprintf("%p", value))
executed2++
return nil
}))
require.NoError(t, err)
require.Zero(t, executed1)
require.Zero(t, executed2)
var result []*http.Server
err = c.Resolve(&result)
require.NoError(t, err)
// check that decorate called only once
err = c.Resolve(&result)
require.NoError(t, err)
require.Equal(t, 1, executed1)
require.Equal(t, 1, executed2)
})
t.Run("decorate interfaces", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
executed1 := 0
server1 := &http.Server{}
err = c.ProvideValue(server1, di.Decorate(func(value di.Value) error {
require.Equal(t, fmt.Sprintf("%p", server1), fmt.Sprintf("%p", value))
executed1++
return nil
}), di.As(new(io.Closer)))
require.NoError(t, err)
require.Zero(t, executed1)
var result io.Closer
err = c.Resolve(&result)
require.NoError(t, err)
err = c.Resolve(&result)
require.NoError(t, err)
require.Equal(t, 1, executed1)
})
}
func TestContainer_Apply(t *testing.T) {
t.Run("apply applies container options with error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
err = c.Apply(
di.Provide(func() *http.Server { return &http.Server{} }, di.As(new(io.Closer))),
di.Provide(func() *os.File { return &os.File{} }, di.As(new(io.Closer))),
)
require.NoError(t, err)
var closer io.Closer
err = c.Resolve(&closer)
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": multiple definitions of io.Closer, maybe you need to use group type: []io.Closer")
})
}
func TestContainer_Interfaces(t *testing.T) {
t.Run("resolve interface with several implementations cause error", func(t *testing.T) {
c, err := di.New(
di.Provide(func() *http.Server { return &http.Server{} }, di.As(new(io.Closer))),
di.Provide(func() *os.File { return &os.File{} }, di.As(new(io.Closer))),
)
require.NoError(t, err)
var closer io.Closer
err = c.Resolve(&closer)
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": multiple definitions of io.Closer, maybe you need to use group type: []io.Closer")
})
t.Run("resolve constructor interface argument", func(t *testing.T) {
mux := &http.ServeMux{}
c, err := di.New(
di.Provide(func() *http.ServeMux { return mux }, di.As(new(http.Handler))),
di.Provide(func(handler http.Handler) *http.Server { return &http.Server{Handler: handler} }),
)
require.NoError(t, err)
var handler http.Handler
err = c.Resolve(&handler)
require.NoError(t, err)
var server *http.Server
err = c.Resolve(&server)
require.NoError(t, err)
require.Equal(t, fmt.Sprintf("%p", mux), fmt.Sprintf("%p", server.Handler))
})
t.Run("resolve not existing unnamed definition with named", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NoError(t, c.Provide(http.NewServeMux, di.WithName("two")))
require.NoError(t, c.Provide(http.NewServeMux, di.WithName("three")))
var mux *http.ServeMux
err = c.Resolve(&mux)
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": multiple definitions of *http.ServeMux, maybe you need to use group type: []*http.ServeMux")
})
t.Run("resolve same pointer on resolve", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
require.NoError(t, c.Provide(func() *http.ServeMux { return &http.ServeMux{} }, di.As(new(http.Handler))))
var server *http.ServeMux
require.NoError(t, c.Resolve(&server))
var handler http.Handler
require.NoError(t, c.Resolve(&handler))
require.Equal(t, fmt.Sprintf("%p", server), fmt.Sprintf("%p", handler))
})
}
func TestContainer_Groups(t *testing.T) {
t.Run("resolve multiple type instances as slice of type", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
conn1 := &net.TCPConn{}
conn2 := &net.TCPConn{}
require.NoError(t, c.Provide(func() *net.TCPConn { return conn1 }))
require.NoError(t, c.Provide(func() *net.TCPConn { return conn2 }))
var conns []*net.TCPConn
require.NoError(t, c.Resolve(&conns))
require.Len(t, conns, 2)
require.Equal(t, fmt.Sprintf("%p", conn1), fmt.Sprintf("%p", conns[0]))
require.Equal(t, fmt.Sprintf("%p", conn2), fmt.Sprintf("%p", conns[1]))
})
t.Run("resolve not specific type of group cause error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
conn1 := &net.TCPConn{}
conn2 := &net.TCPConn{}
require.NoError(t, c.Provide(func() *net.TCPConn { return conn1 }))
require.NoError(t, c.Provide(func() *net.TCPConn { return conn2 }))
var conn *net.TCPConn
err = c.Resolve(&conn)
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": multiple definitions of *net.TCPConn, maybe you need to use group type: []*net.TCPConn")
})
t.Run("resolve group of interface", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
server := &http.Server{}
file := &os.File{}
require.NoError(t, c.Provide(func() *http.Server { return server }, di.As(new(io.Closer))))
require.NoError(t, c.Provide(func() *os.File { return file }, di.As(new(io.Closer))))
var closers []io.Closer
require.NoError(t, c.Resolve(&closers))
require.Len(t, closers, 2)
require.Equal(t, fmt.Sprintf("%p", server), fmt.Sprintf("%p", closers[0]))
require.Equal(t, fmt.Sprintf("%p", file), fmt.Sprintf("%p", closers[1]))
})
t.Run("group updates on provide", func(t *testing.T) {
var result []string
fn1 := func() { result = append(result, "fn1") }
fn2 := func() { result = append(result, "fn2") }
fn3 := func() { result = append(result, "fn3") }
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
type MyFunc func()
var funcs []MyFunc
require.NoError(t, c.Provide(func() MyFunc { return fn1 }))
require.NoError(t, c.Resolve(&funcs))
require.Len(t, funcs, 1)
require.NoError(t, c.Provide(func() MyFunc { return fn2 }))
require.NoError(t, c.Resolve(&funcs))
require.Len(t, funcs, 2)
require.NoError(t, c.Provide(func() MyFunc { return fn3 }))
require.NoError(t, c.Resolve(&funcs))
require.Len(t, funcs, 3)
})
t.Run("resolve one interface from group of type", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
conn1 := &net.TCPConn{}
conn2 := &net.TCPConn{}
require.NoError(t, c.Provide(func() *net.TCPConn { return conn1 }))
require.NoError(t, c.Provide(func() *net.TCPConn { return conn2 }, di.As(new(net.Conn))))
var conn net.Conn
require.NoError(t, c.Resolve(&conn))
require.Equal(t, fmt.Sprintf("%p", conn), fmt.Sprintf("%p", conn))
})
}
func TestContainer_Iterate(t *testing.T) {
t.Run("iterate over nil causes error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
err = c.Iterate(nil, func(tags di.Tags, loader di.ValueFunc) error {
return nil
})
require.EqualError(t, err, "target must be a pointer, got nil")
})
t.Run("iterate over struct causes error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
err = c.Iterate(http.ServeMux{}, func(tags di.Tags, loader di.ValueFunc) error {
return nil
})
require.EqualError(t, err, "target must be a pointer, got http.ServeMux")
})
t.Run("iterate over struct causes error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
require.NoError(t, c.Provide(func() http.ServeMux { return http.ServeMux{} }))
err = c.Iterate(&http.ServeMux{}, func(tags di.Tags, loader di.ValueFunc) error {
return nil
})
require.EqualError(t, err, "iteration can be used with groups only")
})
t.Run("iterates over instances", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
conn1 := &net.TCPConn{}
conn2 := &net.TCPConn{}
require.NoError(t, c.Provide(func() *net.TCPConn { return conn1 }))
require.NoError(t, c.Provide(func() *net.TCPConn { return conn2 }))
var iterates []*net.TCPConn
var conn []*net.TCPConn
iterFn := func(tags di.Tags, loader di.ValueFunc) error {
i, err := loader()
if err != nil {
return err
}
iterates = append(iterates, i.(*net.TCPConn))
return nil
}
err = c.Iterate(&conn, iterFn)
require.NoError(t, err)
require.Len(t, iterates, 2)
require.Equal(t, iterates[0], conn1)
require.Equal(t, iterates[1], conn2)
})
t.Run("iterates over tagged instances", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
conn1 := &net.TCPConn{}
conn2 := &net.TCPConn{}
require.NoError(t, c.Provide(func() *net.TCPConn { return conn1 }, di.Tags{"conn": "tcp1"}))
require.NoError(t, c.Provide(func() *net.TCPConn { return conn2 }, di.Tags{"conn": "tcp2"}))
require.NoError(t, c.Provide(func() *net.TCPConn { return &net.TCPConn{} }))
var iterates []*net.TCPConn
var all []di.Tags
var conn []*net.TCPConn
iterFn := func(tags di.Tags, loader di.ValueFunc) error {
all = append(all, tags)
i, err := loader()
if err != nil {
return err
}
iterates = append(iterates, i.(*net.TCPConn))
return nil
}
err = c.Iterate(&conn, iterFn, di.Tags{"conn": "*"})
require.NoError(t, err)
require.Len(t, iterates, 2)
require.Equal(t, conn1, iterates[0])
require.Equal(t, conn2, iterates[1])
require.Equal(t, []di.Tags{
{"conn": "tcp1"},
{"conn": "tcp2"},
}, all)
})
t.Run("iterates over instances with errors", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
conn1 := &net.TCPConn{}
conn2 := &net.TCPConn{}
require.NoError(t, c.Provide(func() *net.TCPConn { return conn1 }))
require.NoError(t, c.Provide(func() (*net.TCPConn, error) { return conn2, fmt.Errorf("tcp conn 2 error") }))
var iterates []*net.TCPConn
var conn []*net.TCPConn
iterFn := func(tags di.Tags, loader di.ValueFunc) error {
i, err := loader()
if err != nil {
return err
}
iterates = append(iterates, i.(*net.TCPConn))
return nil
}
err = c.Iterate(&conn, iterFn)
require.EqualError(t, err, "[]*net.TCPConn with index 1 failed: tcp conn 2 error")
})
}
func TestContainer_Tags(t *testing.T) {
t.Run("resolve named definition", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
first := &http.Server{}
second := &http.Server{}
err = c.Provide(func() *http.Server { return first }, di.WithName("first"))
require.NoError(t, err)
err = c.Provide(func() *http.Server { return second }, di.WithName("second"))
require.NoError(t, err)
var extracted *http.Server
err = c.Resolve(&extracted)
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": multiple definitions of *http.Server, maybe you need to use group type: []*http.Server")
err = c.Resolve(&extracted, di.Name("first"))
require.NoError(t, err)
require.Equal(t, fmt.Sprintf("%p", first), fmt.Sprintf("%p", extracted))
err = c.Resolve(&extracted, di.Name("second"))
require.NoError(t, err)
require.Equal(t, fmt.Sprintf("%p", second), fmt.Sprintf("%p", extracted))
})
t.Run("resolve single instance of group without specifying tags cause error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
require.NoError(t, c.Provide(http.NewServeMux, di.WithName("first")))
var mux *http.ServeMux
require.NoError(t, c.Resolve(&mux))
require.NoError(t, c.Provide(http.NewServeMux, di.WithName("second")))
err = c.Resolve(&mux)
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": multiple definitions of *http.ServeMux, maybe you need to use group type: []*http.ServeMux")
})
t.Run("resolve not found by tags instance cause error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
require.NoError(t, c.Provide(http.NewServeMux, di.WithName("first")))
require.NoError(t, c.Provide(http.NewServeMux, di.WithName("second")))
var mux *http.ServeMux
err = c.Resolve(&mux, di.Name("unknown"))
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": type *http.ServeMux[name:unknown] not exists")
})
t.Run("provide duplication of named definition", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NotNil(t, c)
require.NoError(t, c.Provide(http.NewServeMux, di.WithName("first")))
err = c.Provide(http.NewServeMux, di.WithName("first"))
require.NoError(t, err)
})
t.Run("resolve existing unnamed definition with named", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NoError(t, c.Provide(http.NewServeMux))
require.NoError(t, c.Provide(http.NewServeMux, di.WithName("two")))
require.NoError(t, c.Provide(http.NewServeMux, di.WithName("three")))
var mux *http.ServeMux
err = c.Resolve(&mux)
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), "multiple definitions of *http.ServeMux, maybe you need to use group type: []*http.ServeMux")
require.NoError(t, c.Resolve(&mux, di.Name("two")))
require.NoError(t, c.Resolve(&mux, di.Name("three")))
})
t.Run("resolve instances with same tag", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NoError(t, c.Provide(http.NewServeMux))
require.NoError(t, c.Provide(http.NewServeMux, di.Tags{"tag": "the_same"}))
require.NoError(t, c.Provide(http.NewServeMux, di.Tags{"tag": "the_same"}))
var muxs []*http.ServeMux
err = c.Resolve(&muxs, di.Tags{"tag": "the_same"})
require.NoError(t, err)
require.Len(t, muxs, 2)
})
t.Run("resolve all instances with tag", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NoError(t, c.Provide(http.NewServeMux))
require.NoError(t, c.Provide(http.NewServeMux, di.Tags{"server": "one"}))
require.NoError(t, c.Provide(http.NewServeMux, di.Tags{"server": "two"}))
var muxs []*http.ServeMux
err = c.Resolve(&muxs, di.Tags{"server": "*"})
require.NoError(t, err)
require.Len(t, muxs, 2)
})
t.Run("resolve all instances with several tags", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
require.NoError(t, c.Provide(http.NewServeMux))
require.NoError(t, c.Provide(http.NewServeMux, di.Tags{"server": "one"}))
require.NoError(t, c.Provide(http.NewServeMux, di.Tags{"server": "one", "http": "one"}))
require.NoError(t, c.Provide(http.NewServeMux, di.Tags{"server": "two", "http": "two"}))
var muxs []*http.ServeMux
err = c.Resolve(&muxs, di.Tags{"server": "*", "http": "*"})
require.NoError(t, err)
require.Len(t, muxs, 2)
})
t.Run("provide type with tags (deprecated)", func(t *testing.T) {
type Server struct {
di.Tags `http:"true" server:"true"`
}
var s *Server
_, err := di.New(
di.Provide(func() *Server { return &Server{} }),
di.Resolve(&s, di.Tags{"http": "true", "server": "true"}),
)
require.NoError(t, err)
})
t.Run("provide type with tags", func(t *testing.T) {
type Server struct {
di.Tags `di:"http=true,server=true"`
}
var s *Server
_, err := di.New(
di.Provide(func() *Server { return &Server{} }),
di.Resolve(&s, di.Tags{"http": "true", "server": "true"}),
)
require.NoError(t, err)
})
t.Run("provide type with non di tags", func(t *testing.T) {
type Dep struct {
}
type Server struct {
di.Inject
Dep *Dep `json:"dep" di:""`
}
var s Server
_, err := di.New(
di.Provide(func() *Dep { return &Dep{} }),
di.Resolve(&s),
)
require.NoError(t, err)
})
}
func TestContainer_Group(t *testing.T) {
t.Run("resolve group argument", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
server := &http.Server{}
file := &os.File{}
require.NoError(t, c.Provide(func() *http.Server { return server }, di.As(new(io.Closer))))
require.NoError(t, c.Provide(func() *os.File { return file }, di.As(new(io.Closer))))
type Closers []io.Closer
require.NoError(t, c.Provide(func(closers []io.Closer) Closers { return closers }))
var closers Closers
require.NoError(t, c.Resolve(&closers))
require.Equal(t, fmt.Sprintf("%p", server), fmt.Sprintf("%p", closers[0]))
require.Equal(t, fmt.Sprintf("%p", file), fmt.Sprintf("%p", closers[1]))
})
t.Run("incorrect signature", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
err = c.Invoke(func() *http.Server { return &http.Server{} })
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": invalid invocation signature, got func() *http.Server")
})
}
func TestContainer_Invoke(t *testing.T) {
t.Run("invoke nil", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
err = c.Invoke(nil)
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": invalid invocation signature, got nil")
})
t.Run("invoke non function type", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
err = c.Invoke(1)
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": invalid invocation signature, got int")
})
t.Run("invoke invalid function", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)
err = c.Invoke(func() *http.Server { return &http.Server{} })
require.Error(t, err)
require.Contains(t, err.Error(), "container_test.go:")
require.Contains(t, err.Error(), ": invalid invocation signature, got func() *http.Server")
})
t.Run("invocation function with not provided dependency cause error", func(t *testing.T) {
c, err := di.New()
require.NoError(t, err)