Repository navigation
Expand file tree
/
Copy pathtest_methods.py
More file actions
1050 lines (938 loc) · 50.2 KB
/
Copy pathtest_methods.py
File metadata and controls
1050 lines (938 loc) · 50.2 KB
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
"""Tests for the wire-method maps and two-step parse functions in `mcp_types.methods`."""
import importlib.util
from collections.abc import Mapping
from types import MappingProxyType, UnionType
from typing import Any, get_args
import mcp_types as types
import mcp_types._v2025_11_25 as v2025
import mcp_types._v2026_07_28 as v2026
import pydantic
import pytest
from mcp_types import methods
from mcp_types.version import KNOWN_PROTOCOL_VERSIONS
from pydantic import BaseModel
# Transcribed from each schema's ClientRequest/ServerRequest/ClientNotification/
# ServerNotification unions, minus the tasks/* family (extensions register those).
EXPECTED_METHODS: dict[str, dict[str, frozenset[str]]] = {
"2024-11-05": {
"CLIENT_REQUESTS": frozenset(
{
"completion/complete",
"initialize",
"logging/setLevel",
"ping",
"prompts/get",
"prompts/list",
"resources/list",
"resources/read",
"resources/subscribe",
"resources/templates/list",
"resources/unsubscribe",
"tools/call",
"tools/list",
}
),
"CLIENT_NOTIFICATIONS": frozenset(
{
"notifications/cancelled",
"notifications/initialized",
"notifications/progress",
"notifications/roots/list_changed",
}
),
"SERVER_REQUESTS": frozenset({"ping", "roots/list", "sampling/createMessage"}),
"SERVER_NOTIFICATIONS": frozenset(
{
"notifications/cancelled",
"notifications/message",
"notifications/progress",
"notifications/prompts/list_changed",
"notifications/resources/list_changed",
"notifications/resources/updated",
"notifications/tools/list_changed",
}
),
},
"2025-03-26": {
"CLIENT_REQUESTS": frozenset(
{
"completion/complete",
"initialize",
"logging/setLevel",
"ping",
"prompts/get",
"prompts/list",
"resources/list",
"resources/read",
"resources/subscribe",
"resources/templates/list",
"resources/unsubscribe",
"tools/call",
"tools/list",
}
),
"CLIENT_NOTIFICATIONS": frozenset(
{
"notifications/cancelled",
"notifications/initialized",
"notifications/progress",
"notifications/roots/list_changed",
}
),
"SERVER_REQUESTS": frozenset({"ping", "roots/list", "sampling/createMessage"}),
"SERVER_NOTIFICATIONS": frozenset(
{
"notifications/cancelled",
"notifications/message",
"notifications/progress",
"notifications/prompts/list_changed",
"notifications/resources/list_changed",
"notifications/resources/updated",
"notifications/tools/list_changed",
}
),
},
"2025-06-18": {
"CLIENT_REQUESTS": frozenset(
{
"completion/complete",
"initialize",
"logging/setLevel",
"ping",
"prompts/get",
"prompts/list",
"resources/list",
"resources/read",
"resources/subscribe",
"resources/templates/list",
"resources/unsubscribe",
"tools/call",
"tools/list",
}
),
"CLIENT_NOTIFICATIONS": frozenset(
{
"notifications/cancelled",
"notifications/initialized",
"notifications/progress",
"notifications/roots/list_changed",
}
),
"SERVER_REQUESTS": frozenset({"elicitation/create", "ping", "roots/list", "sampling/createMessage"}),
"SERVER_NOTIFICATIONS": frozenset(
{
"notifications/cancelled",
"notifications/message",
"notifications/progress",
"notifications/prompts/list_changed",
"notifications/resources/list_changed",
"notifications/resources/updated",
"notifications/tools/list_changed",
}
),
},
"2025-11-25": {
"CLIENT_REQUESTS": frozenset(
{
"completion/complete",
"initialize",
"logging/setLevel",
"ping",
"prompts/get",
"prompts/list",
"resources/list",
"resources/read",
"resources/subscribe",
"resources/templates/list",
"resources/unsubscribe",
"tools/call",
"tools/list",
}
),
"CLIENT_NOTIFICATIONS": frozenset(
{
"notifications/cancelled",
"notifications/initialized",
"notifications/progress",
"notifications/roots/list_changed",
}
),
"SERVER_REQUESTS": frozenset({"elicitation/create", "ping", "roots/list", "sampling/createMessage"}),
"SERVER_NOTIFICATIONS": frozenset(
{
"notifications/cancelled",
"notifications/elicitation/complete",
"notifications/message",
"notifications/progress",
"notifications/prompts/list_changed",
"notifications/resources/list_changed",
"notifications/resources/updated",
"notifications/tools/list_changed",
}
),
},
"2026-07-28": {
"CLIENT_REQUESTS": frozenset(
{
"completion/complete",
"prompts/get",
"prompts/list",
"resources/list",
"resources/read",
"resources/templates/list",
"server/discover",
"subscriptions/listen",
"tools/call",
"tools/list",
}
),
"CLIENT_NOTIFICATIONS": frozenset({"notifications/cancelled"}),
# No standalone server-to-client request channel at this version.
"SERVER_REQUESTS": frozenset(),
"SERVER_NOTIFICATIONS": frozenset(
{
"notifications/cancelled",
"notifications/message",
"notifications/progress",
"notifications/prompts/list_changed",
"notifications/resources/list_changed",
"notifications/resources/updated",
"notifications/subscriptions/acknowledged",
"notifications/tools/list_changed",
}
),
},
}
# Pinned per (method, version): class identity, or exact arm tuple for unions.
EXPECTED_SERVER_RESULTS: dict[tuple[str, str], type[BaseModel] | tuple[type[BaseModel], ...]] = {
("completion/complete", "2024-11-05"): v2025.CompleteResult,
("initialize", "2024-11-05"): v2025.InitializeResult,
("logging/setLevel", "2024-11-05"): v2025.EmptyResult,
("ping", "2024-11-05"): v2025.EmptyResult,
("prompts/get", "2024-11-05"): v2025.GetPromptResult,
("prompts/list", "2024-11-05"): v2025.ListPromptsResult,
("resources/list", "2024-11-05"): v2025.ListResourcesResult,
("resources/read", "2024-11-05"): v2025.ReadResourceResult,
("resources/subscribe", "2024-11-05"): v2025.EmptyResult,
("resources/templates/list", "2024-11-05"): v2025.ListResourceTemplatesResult,
("resources/unsubscribe", "2024-11-05"): v2025.EmptyResult,
("tools/call", "2024-11-05"): v2025.CallToolResult,
("tools/list", "2024-11-05"): v2025.ListToolsResult,
("completion/complete", "2025-03-26"): v2025.CompleteResult,
("initialize", "2025-03-26"): v2025.InitializeResult,
("logging/setLevel", "2025-03-26"): v2025.EmptyResult,
("ping", "2025-03-26"): v2025.EmptyResult,
("prompts/get", "2025-03-26"): v2025.GetPromptResult,
("prompts/list", "2025-03-26"): v2025.ListPromptsResult,
("resources/list", "2025-03-26"): v2025.ListResourcesResult,
("resources/read", "2025-03-26"): v2025.ReadResourceResult,
("resources/subscribe", "2025-03-26"): v2025.EmptyResult,
("resources/templates/list", "2025-03-26"): v2025.ListResourceTemplatesResult,
("resources/unsubscribe", "2025-03-26"): v2025.EmptyResult,
("tools/call", "2025-03-26"): v2025.CallToolResult,
("tools/list", "2025-03-26"): v2025.ListToolsResult,
("completion/complete", "2025-06-18"): v2025.CompleteResult,
("initialize", "2025-06-18"): v2025.InitializeResult,
("logging/setLevel", "2025-06-18"): v2025.EmptyResult,
("ping", "2025-06-18"): v2025.EmptyResult,
("prompts/get", "2025-06-18"): v2025.GetPromptResult,
("prompts/list", "2025-06-18"): v2025.ListPromptsResult,
("resources/list", "2025-06-18"): v2025.ListResourcesResult,
("resources/read", "2025-06-18"): v2025.ReadResourceResult,
("resources/subscribe", "2025-06-18"): v2025.EmptyResult,
("resources/templates/list", "2025-06-18"): v2025.ListResourceTemplatesResult,
("resources/unsubscribe", "2025-06-18"): v2025.EmptyResult,
("tools/call", "2025-06-18"): v2025.CallToolResult,
("tools/list", "2025-06-18"): v2025.ListToolsResult,
("completion/complete", "2025-11-25"): v2025.CompleteResult,
("initialize", "2025-11-25"): v2025.InitializeResult,
("logging/setLevel", "2025-11-25"): v2025.EmptyResult,
("ping", "2025-11-25"): v2025.EmptyResult,
("prompts/get", "2025-11-25"): v2025.GetPromptResult,
("prompts/list", "2025-11-25"): v2025.ListPromptsResult,
("resources/list", "2025-11-25"): v2025.ListResourcesResult,
("resources/read", "2025-11-25"): v2025.ReadResourceResult,
("resources/subscribe", "2025-11-25"): v2025.EmptyResult,
("resources/templates/list", "2025-11-25"): v2025.ListResourceTemplatesResult,
("resources/unsubscribe", "2025-11-25"): v2025.EmptyResult,
("tools/call", "2025-11-25"): v2025.CallToolResult,
("tools/list", "2025-11-25"): v2025.ListToolsResult,
("completion/complete", "2026-07-28"): v2026.CompleteResult,
("prompts/get", "2026-07-28"): (v2026.GetPromptResult, v2026.InputRequiredResult),
("prompts/list", "2026-07-28"): v2026.ListPromptsResult,
("resources/list", "2026-07-28"): v2026.ListResourcesResult,
("resources/read", "2026-07-28"): (v2026.ReadResourceResult, v2026.InputRequiredResult),
("resources/templates/list", "2026-07-28"): v2026.ListResourceTemplatesResult,
("server/discover", "2026-07-28"): v2026.DiscoverResult,
("subscriptions/listen", "2026-07-28"): v2026.SubscriptionsListenResult,
("tools/call", "2026-07-28"): (v2026.CallToolResult, v2026.InputRequiredResult),
("tools/list", "2026-07-28"): v2026.ListToolsResult,
}
EXPECTED_CLIENT_RESULTS: dict[tuple[str, str], type[BaseModel] | tuple[type[BaseModel], ...]] = {
("ping", "2024-11-05"): v2025.EmptyResult,
("roots/list", "2024-11-05"): v2025.ListRootsResult,
("sampling/createMessage", "2024-11-05"): v2025.CreateMessageResult,
("ping", "2025-03-26"): v2025.EmptyResult,
("roots/list", "2025-03-26"): v2025.ListRootsResult,
("sampling/createMessage", "2025-03-26"): v2025.CreateMessageResult,
("elicitation/create", "2025-06-18"): v2025.ElicitResult,
("ping", "2025-06-18"): v2025.EmptyResult,
("roots/list", "2025-06-18"): v2025.ListRootsResult,
("sampling/createMessage", "2025-06-18"): v2025.CreateMessageResult,
("elicitation/create", "2025-11-25"): v2025.ElicitResult,
("ping", "2025-11-25"): v2025.EmptyResult,
("roots/list", "2025-11-25"): v2025.ListRootsResult,
("sampling/createMessage", "2025-11-25"): v2025.CreateMessageResult,
}
EMPTY_SERVER_RESPONSE_METHODS = frozenset({"logging/setLevel", "ping", "resources/subscribe", "resources/unsubscribe"})
EMPTY_CLIENT_RESPONSE_METHODS = frozenset({"ping"})
# Pre-2026 versions share the 2025-11-25 surface package.
PACKAGE_BY_VERSION = {
"2024-11-05": "mcp_types._v2025_11_25",
"2025-03-26": "mcp_types._v2025_11_25",
"2025-06-18": "mcp_types._v2025_11_25",
"2025-11-25": "mcp_types._v2025_11_25",
"2026-07-28": "mcp_types._v2026_07_28",
}
# The reserved `params._meta` entries the 2026 surface accepts on every request.
# `clientInfo` is optional (SHOULD-include, spec PR #3002); the other two are required.
META_TRIPLE: dict[str, Any] = {
"io.modelcontextprotocol/protocolVersion": "2026-07-28",
"io.modelcontextprotocol/clientInfo": {"name": "client", "version": "1.0"},
"io.modelcontextprotocol/clientCapabilities": {},
}
META_REQUIRED_KEYS = ("io.modelcontextprotocol/protocolVersion", "io.modelcontextprotocol/clientCapabilities")
# One minimal valid params mapping per surface request class.
REQUEST_PARAMS_FIXTURES: dict[type[BaseModel], dict[str, Any] | None] = {
v2025.CallToolRequest: {"name": "echo"},
v2025.CompleteRequest: {"ref": {"type": "ref/prompt", "name": "p"}, "argument": {"name": "a", "value": "v"}},
v2025.CreateMessageRequest: {
"messages": [{"role": "user", "content": {"type": "text", "text": "hi"}}],
"maxTokens": 100,
},
v2025.ElicitRequest: {"message": "m", "requestedSchema": {"type": "object", "properties": {}}},
v2025.GetPromptRequest: {"name": "greeting"},
v2025.InitializeRequest: {
"protocolVersion": "2025-11-25",
"capabilities": {},
"clientInfo": {"name": "client", "version": "1.0"},
},
v2025.ListPromptsRequest: None,
v2025.ListResourcesRequest: None,
v2025.ListResourceTemplatesRequest: None,
v2025.ListRootsRequest: None,
v2025.ListToolsRequest: None,
v2025.PingRequest: None,
v2025.ReadResourceRequest: {"uri": "https://example.com/resource"},
v2025.SetLevelRequest: {"level": "info"},
v2025.SubscribeRequest: {"uri": "https://example.com/resource"},
v2025.UnsubscribeRequest: {"uri": "https://example.com/resource"},
v2026.CallToolRequest: {"_meta": META_TRIPLE, "name": "echo"},
v2026.CompleteRequest: {
"_meta": META_TRIPLE,
"ref": {"type": "ref/prompt", "name": "p"},
"argument": {"name": "a", "value": "v"},
},
v2026.DiscoverRequest: {"_meta": META_TRIPLE},
v2026.GetPromptRequest: {"_meta": META_TRIPLE, "name": "greeting"},
v2026.ListPromptsRequest: {"_meta": META_TRIPLE},
v2026.ListResourcesRequest: {"_meta": META_TRIPLE},
v2026.ListResourceTemplatesRequest: {"_meta": META_TRIPLE},
v2026.ListToolsRequest: {"_meta": META_TRIPLE},
v2026.ReadResourceRequest: {"_meta": META_TRIPLE, "uri": "https://example.com/resource"},
v2026.SubscriptionsListenRequest: {"_meta": META_TRIPLE, "notifications": {}},
}
NOTIFICATION_PARAMS_FIXTURES: dict[type[BaseModel], dict[str, Any] | None] = {
v2025.CancelledNotification: {"requestId": 1},
v2025.ElicitationCompleteNotification: {"elicitationId": "e1"},
v2025.InitializedNotification: None,
v2025.LoggingMessageNotification: {"level": "info", "data": "x"},
v2025.ProgressNotification: {"progressToken": 1, "progress": 0.5},
v2025.PromptListChangedNotification: None,
v2025.ResourceListChangedNotification: None,
v2025.ResourceUpdatedNotification: {"uri": "https://example.com/resource"},
v2025.RootsListChangedNotification: None,
v2025.ToolListChangedNotification: None,
v2026.CancelledNotification: {"requestId": 1},
v2026.LoggingMessageNotification: {"level": "info", "data": "x"},
v2026.ProgressNotification: {"progressToken": 1, "progress": 0.5},
v2026.PromptListChangedNotification: None,
v2026.ResourceListChangedNotification: None,
v2026.ResourceUpdatedNotification: {"uri": "https://example.com/resource"},
v2026.SubscriptionsAcknowledgedNotification: {"notifications": {}},
v2026.ToolListChangedNotification: None,
}
# One minimal valid result body per response row value (class or union alias).
RESULT_BODY_FIXTURES: dict[type[BaseModel] | UnionType, dict[str, Any]] = {
v2025.CallToolResult: {"content": []},
v2025.CompleteResult: {"completion": {"values": []}},
v2025.CreateMessageResult: {"role": "assistant", "content": {"type": "text", "text": "hi"}, "model": "m"},
v2025.ElicitResult: {"action": "accept"},
v2025.EmptyResult: {},
v2025.GetPromptResult: {"messages": []},
v2025.InitializeResult: {
"protocolVersion": "2025-11-25",
"capabilities": {},
"serverInfo": {"name": "server", "version": "1.0"},
},
v2025.ListPromptsResult: {"prompts": []},
v2025.ListResourcesResult: {"resources": []},
v2025.ListResourceTemplatesResult: {"resourceTemplates": []},
v2025.ListRootsResult: {"roots": [{"uri": "file:///workspace"}]},
v2025.ListToolsResult: {"tools": []},
v2025.ReadResourceResult: {"contents": []},
v2026.AnyCallToolResult: {"content": [], "resultType": "complete"},
v2026.AnyGetPromptResult: {"messages": [], "resultType": "complete"},
v2026.AnyReadResourceResult: {"contents": [], "resultType": "complete", "ttlMs": 0, "cacheScope": "private"},
v2026.CompleteResult: {"completion": {"values": []}, "resultType": "complete"},
v2026.DiscoverResult: {
"supportedVersions": ["2026-07-28"],
"capabilities": {},
"resultType": "complete",
"ttlMs": 0,
"cacheScope": "private",
},
v2026.SubscriptionsListenResult: {
"resultType": "complete",
"_meta": {"io.modelcontextprotocol/subscriptionId": 1},
},
v2026.ListPromptsResult: {"prompts": [], "resultType": "complete", "ttlMs": 0, "cacheScope": "private"},
v2026.ListResourcesResult: {"resources": [], "resultType": "complete", "ttlMs": 0, "cacheScope": "private"},
v2026.ListResourceTemplatesResult: {
"resourceTemplates": [],
"resultType": "complete",
"ttlMs": 0,
"cacheScope": "private",
},
v2026.ListToolsResult: {"tools": [], "resultType": "complete", "ttlMs": 0, "cacheScope": "private"},
}
def test_maps_define_exactly_the_expected_methods_for_every_known_version():
# Derive the version axis from KNOWN_PROTOCOL_VERSIONS so a new version
# without map rows fails here rather than gating every method at runtime.
assert set(EXPECTED_METHODS) == set(KNOWN_PROTOCOL_VERSIONS)
surface_maps: dict[str, Mapping[tuple[str, str], object]] = {
"CLIENT_REQUESTS": methods.CLIENT_REQUESTS,
"CLIENT_NOTIFICATIONS": methods.CLIENT_NOTIFICATIONS,
"SERVER_REQUESTS": methods.SERVER_REQUESTS,
"SERVER_NOTIFICATIONS": methods.SERVER_NOTIFICATIONS,
}
for version in KNOWN_PROTOCOL_VERSIONS:
for map_name, surface_map in surface_maps.items():
derived = {method for (method, row_version) in surface_map if row_version == version}
assert derived == EXPECTED_METHODS[version][map_name], f"{map_name} at {version}"
def test_spec_client_method_sets_are_the_client_direction_projection_of_the_surface_maps():
assert methods.SPEC_CLIENT_METHODS == {m for m, _ in methods.CLIENT_REQUESTS}
assert methods.SPEC_CLIENT_NOTIFICATION_METHODS == {m for m, _ in methods.CLIENT_NOTIFICATIONS}
# Server-direction methods stay out so a server-side custom registration routes as custom.
assert "roots/list" not in methods.SPEC_CLIENT_METHODS
assert "notifications/message" not in methods.SPEC_CLIENT_NOTIFICATION_METHODS
def test_elicit_result_surface_accepts_null_content_values_at_every_version_that_defines_it():
"""Monolith superset leniency: hosts may answer optional form fields with null."""
for (method, _), surface in methods.CLIENT_RESULTS.items():
if method != "elicitation/create":
continue
assert isinstance(surface, type)
surface.model_validate({"action": "accept", "content": {"name": "x", "age": None}})
for surface in (v2025.ElicitResult, v2026.ElicitResult):
surface.model_validate({"action": "accept", "content": {"name": "x", "age": None}})
def test_discovery_capabilities_preserve_nested_json_values() -> None:
"""Spec `JSONValue` permits nested containers and every JSON scalar, including numbers and null."""
extensions = {"x": {"nested": [None, True, 1, 1.5, "text", {"child": [False]}]}}
raw = {
"supportedVersions": ["2026-07-28"],
"capabilities": {"extensions": extensions},
"resultType": "complete",
"ttlMs": 0,
"cacheScope": "private",
}
parsed = methods.parse_server_result("server/discover", "2026-07-28", raw)
assert isinstance(parsed, types.DiscoverResult)
assert parsed.capabilities.extensions == extensions
assert methods.serialize_server_result("server/discover", "2026-07-28", raw) == raw
def test_elicit_request_surface_accepts_loose_property_schemas():
"""Older python-sdk emits `anyOf` for `Optional` form fields; the surface gate must let it through."""
params = {
"message": "m",
"requestedSchema": {
"type": "object",
"properties": {"x": {"anyOf": [{"type": "integer"}, {"type": "null"}]}},
},
}
parsed = methods.parse_server_request("elicitation/create", "2025-11-25", params)
assert isinstance(parsed, types.ElicitRequest)
def test_2025_11_25_tool_schema_surfaces_accept_boolean_sub_schemas():
"""JSON Schema 2020-12 allows `true`/`false` wherever a sub-schema is expected; real servers emit them."""
tool = {
"name": "echo",
"inputSchema": {"type": "object", "properties": {"arg": True}},
"outputSchema": {
"type": "object",
"properties": {"result": True, "hidden": False, "rows": {"type": "array", "items": True}},
"required": ["result"],
},
}
sieved = methods.serialize_server_result("tools/list", "2025-11-25", {"tools": [tool]})
assert sieved["tools"][0]["inputSchema"] == tool["inputSchema"]
assert sieved["tools"][0]["outputSchema"] == tool["outputSchema"]
def test_response_map_keys_mirror_the_request_map_keys():
assert set(methods.SERVER_RESULTS) == set(methods.CLIENT_REQUESTS)
assert set(methods.CLIENT_RESULTS) == set(methods.SERVER_REQUESTS)
def test_response_row_values_match_the_pinned_classes_and_unions():
"""Only the known empty-response methods may be valued by the bare `EmptyResult`."""
assert set(EXPECTED_SERVER_RESULTS) == set(methods.SERVER_RESULTS)
assert set(EXPECTED_CLIENT_RESULTS) == set(methods.CLIENT_RESULTS)
pinned = [
(methods.SERVER_RESULTS, EXPECTED_SERVER_RESULTS, EMPTY_SERVER_RESPONSE_METHODS),
(methods.CLIENT_RESULTS, EXPECTED_CLIENT_RESULTS, EMPTY_CLIENT_RESPONSE_METHODS),
]
for response_map, expected_rows, empty_methods in pinned:
for (method, version), expected in expected_rows.items():
actual = response_map[(method, version)]
if isinstance(expected, tuple):
assert get_args(actual) == expected, f"{method} at {version}"
else:
assert actual is expected, f"{method} at {version}"
if method not in empty_methods:
assert actual is not v2025.EmptyResult, f"{method} at {version}"
assert actual is not v2026.EmptyResult, f"{method} at {version}"
def test_surface_keys_agree_with_their_classes_and_the_monolith_maps():
"""Each surface key's method matches its class's method literal, its monolith row, and its version's package."""
request_maps: list[Mapping[tuple[str, str], type[BaseModel]]] = [
methods.CLIENT_REQUESTS,
methods.SERVER_REQUESTS,
]
notification_maps: list[Mapping[tuple[str, str], type[BaseModel]]] = [
methods.CLIENT_NOTIFICATIONS,
methods.SERVER_NOTIFICATIONS,
]
for surface_maps, monolith_map in (
(request_maps, methods.MONOLITH_REQUESTS),
(notification_maps, methods.MONOLITH_NOTIFICATIONS),
):
for surface_map in surface_maps:
for (method, version), surface_type in surface_map.items():
assert method in monolith_map, f"{method} has no monolith row"
assert get_args(surface_type.model_fields["method"].annotation) == (method,)
assert get_args(monolith_map[method].model_fields["method"].annotation) == (method,)
assert surface_type.__module__ == PACKAGE_BY_VERSION[version], f"{method} at {version}"
for response_map in (methods.SERVER_RESULTS, methods.CLIENT_RESULTS):
for (method, version), row in response_map.items():
assert method in methods.MONOLITH_RESULTS, f"{method} has no monolith row"
for arm in get_args(row) or (row,):
assert arm.__module__ == PACKAGE_BY_VERSION[version], f"{method} at {version}"
def _assign_item(mapping: Any) -> None:
mapping["new-key"] = None
def test_built_in_maps_are_immutable():
map_names = [
"CLIENT_NOTIFICATIONS",
"CLIENT_REQUESTS",
"CLIENT_RESULTS",
"MONOLITH_NOTIFICATIONS",
"MONOLITH_REQUESTS",
"MONOLITH_RESULTS",
"SERVER_NOTIFICATIONS",
"SERVER_REQUESTS",
"SERVER_RESULTS",
]
for map_name in map_names:
built_in = getattr(methods, map_name)
assert isinstance(built_in, MappingProxyType), map_name
with pytest.raises(TypeError):
_assign_item(built_in)
def test_cacheable_methods_mirror_the_cacheable_method_literal():
"""SEP-2549 weld: the hand-written Literal and the set derived from `MONOLITH_RESULTS` must agree."""
assert methods.CACHEABLE_METHODS == frozenset(get_args(methods.CacheableMethod))
def test_input_required_methods_mirror_the_monolith_input_required_arms():
"""MRTR weld: the spec's three multi-round-trip carriers are the only input_required methods."""
assert methods.INPUT_REQUIRED_METHODS == frozenset({"prompts/get", "resources/read", "tools/call"})
def test_is_input_required_matches_typed_and_wire_shapes():
"""SDK-defined predicate: True only for the typed model and the tagged wire mapping."""
assert methods.is_input_required(types.InputRequiredResult(request_state="s"))
assert methods.is_input_required({"resultType": "input_required", "inputRequests": {}})
assert not methods.is_input_required({"resultType": "complete", "content": []})
assert not methods.is_input_required({})
assert not methods.is_input_required(types.CallToolResult(content=[]))
assert not methods.is_input_required(None)
def test_minimal_request_bodies_parse_through_every_request_row():
for (method, version), surface_type in methods.CLIENT_REQUESTS.items():
parsed = methods.parse_client_request(method, version, REQUEST_PARAMS_FIXTURES[surface_type])
assert isinstance(parsed, types.Request), f"{method} at {version}"
for (method, version), surface_type in methods.SERVER_REQUESTS.items():
parsed = methods.parse_server_request(method, version, REQUEST_PARAMS_FIXTURES[surface_type])
assert isinstance(parsed, types.Request), f"{method} at {version}"
def test_minimal_notification_bodies_parse_through_every_notification_row():
for (method, version), surface_type in methods.CLIENT_NOTIFICATIONS.items():
parsed = methods.parse_client_notification(method, version, NOTIFICATION_PARAMS_FIXTURES[surface_type])
assert isinstance(parsed, types.Notification), f"{method} at {version}"
for (method, version), surface_type in methods.SERVER_NOTIFICATIONS.items():
parsed = methods.parse_server_notification(method, version, NOTIFICATION_PARAMS_FIXTURES[surface_type])
assert isinstance(parsed, types.Notification), f"{method} at {version}"
def test_minimal_result_bodies_parse_through_every_result_row():
for (method, version), row in methods.SERVER_RESULTS.items():
parsed = methods.parse_server_result(method, version, RESULT_BODY_FIXTURES[row])
assert isinstance(parsed, types.Result), f"{method} at {version}"
for (method, version), row in methods.CLIENT_RESULTS.items():
parsed = methods.parse_client_result(method, version, RESULT_BODY_FIXTURES[row])
assert isinstance(parsed, types.Result), f"{method} at {version}"
def test_non_file_root_uri_passes_the_surface_step_and_rejects_at_the_monolith_step():
"""The monolith's `Root.uri` is file-scheme only; the surfaces declare a plain string."""
non_file_roots = {"roots": [{"uri": "https://example.com/x"}]}
# Surface step admits the body, so the two-step parse fails at the monolith step.
pydantic.TypeAdapter(v2025.ListRootsResult).validate_python(non_file_roots)
with pytest.raises(pydantic.ValidationError):
methods.parse_client_result("roots/list", "2025-11-25", non_file_roots)
# Same divergence on the 2026 path that embeds a roots response.
retry_params = {"_meta": META_TRIPLE, "name": "echo", "inputResponses": {"r1": non_file_roots}}
frame = {"jsonrpc": "2.0", "id": 0, "method": "tools/call", "params": retry_params}
v2026.CallToolRequest.model_validate(frame, by_name=False)
with pytest.raises(pydantic.ValidationError):
methods.parse_client_request("tools/call", "2026-07-28", retry_params)
file_roots = {"roots": [{"uri": "file:///workspace"}]}
assert isinstance(methods.parse_client_result("roots/list", "2025-11-25", file_roots), types.ListRootsResult)
retried = methods.parse_client_request(
"tools/call", "2026-07-28", {"_meta": META_TRIPLE, "name": "echo", "inputResponses": {"r1": file_roots}}
)
assert isinstance(retried, types.CallToolRequest)
def test_absent_map_keys_raise_key_error_for_every_gate_shape():
"""Key absence is the version gate; the session layer maps it to `METHOD_NOT_FOUND`."""
gated = [
("resources/subscribe", "2026-07-28"), # removed at this version
("server/discover", "2025-11-25"), # not yet at this version
("tasks/get", "2025-11-25"), # never built-in
("sampling/createMessage", "2025-11-25"), # wrong direction
]
for method, version in gated:
with pytest.raises(KeyError):
methods.parse_client_request(method, version, None)
with pytest.raises(KeyError):
methods.parse_server_request("ping", "2026-07-28", None)
def test_unknown_version_strings_raise_value_error_on_every_parse_function():
body_parsers = [
methods.parse_client_request,
methods.parse_server_request,
methods.parse_client_notification,
methods.parse_server_notification,
]
for body_parser in body_parsers:
with pytest.raises(ValueError) as excinfo:
body_parser("ping", "2099-01-01", None)
assert "2099-01-01" in str(excinfo.value)
result_parsers = [methods.parse_server_result, methods.parse_client_result]
for result_parser in result_parsers:
with pytest.raises(ValueError) as excinfo:
result_parser("ping", "2099-01-01", {})
assert "2099-01-01" in str(excinfo.value)
def test_2026_07_28_requests_missing_a_required_meta_entry_reject_as_missing():
for absent_key in META_REQUIRED_KEYS:
partial_meta = {key: value for key, value in META_TRIPLE.items() if key != absent_key}
with pytest.raises(pydantic.ValidationError) as excinfo:
methods.parse_client_request("tools/list", "2026-07-28", {"_meta": partial_meta})
assert [error["loc"] for error in excinfo.value.errors() if error["type"] == "missing"] == [
("params", "_meta", absent_key)
]
def test_2026_07_28_requests_accept_meta_without_the_optional_client_info():
"""spec PR #3002: `clientInfo` is optional on the 2026 surface - the required
pair alone validates."""
pair_meta = {key: value for key, value in META_TRIPLE.items() if key != "io.modelcontextprotocol/clientInfo"}
parsed = methods.parse_client_request("tools/list", "2026-07-28", {"_meta": pair_meta})
assert isinstance(parsed, types.ListToolsRequest)
def test_2026_07_28_results_require_result_type():
with pytest.raises(pydantic.ValidationError):
methods.parse_server_result("tools/call", "2026-07-28", {"content": []})
with pytest.raises(pydantic.ValidationError):
methods.parse_server_result("subscriptions/listen", "2026-07-28", {})
def test_empty_result_body_parses_at_versions_that_define_it():
parsed = methods.parse_server_result("ping", "2025-11-25", {})
assert isinstance(parsed, types.EmptyResult)
def test_2026_07_28_shaped_result_extras_pass_at_earlier_versions():
"""The earlier surface ignores unknown keys; the monolith preserves them on fields it declares."""
parsed = methods.parse_server_result(
"tools/list", "2025-11-25", {"tools": [], "resultType": "complete", "ttlMs": 5, "cacheScope": "public"}
)
assert isinstance(parsed, types.ListToolsResult)
assert parsed.result_type == "complete"
assert parsed.ttl_ms == 5
assert parsed.cache_scope == "public"
def test_embedded_input_request_entries_without_method_reject_at_the_surface_step():
"""The monolith's embedded request classes default `method`, so only the surface step rejects this."""
body = {"resultType": "input_required", "inputRequests": {"r1": {"params": None}}}
monolith_row = methods.MONOLITH_RESULTS["tools/call"]
monolith_only: types.Result = pydantic.TypeAdapter[Any](monolith_row).validate_python(body)
assert isinstance(monolith_only, types.InputRequiredResult)
with pytest.raises(pydantic.ValidationError):
methods.parse_server_result("tools/call", "2026-07-28", body)
def test_input_required_url_elicit_without_elicitation_id_parses_at_2026():
"""A 2026-07-28 `InputRequiredResult` embedding a URL-mode elicitation parses
through both the surface and monolith steps without `elicitationId`.
Spec-mandated: the field is required at 2025-11-25 only and removed at
2026-07-28; the monolith model carries it as optional so the superset can
accept both versions.
"""
body = {
"resultType": "input_required",
"inputRequests": {
"r1": {
"method": "elicitation/create",
"params": {"mode": "url", "message": "Please sign in", "url": "https://example.com/auth"},
}
},
}
parsed = methods.parse_server_result("tools/call", "2026-07-28", body)
assert isinstance(parsed, types.InputRequiredResult)
assert parsed.input_requests is not None
request = parsed.input_requests["r1"]
assert isinstance(request, types.ElicitRequest)
assert isinstance(request.params, types.ElicitRequestURLParams)
assert request.params.url == "https://example.com/auth"
assert request.params.elicitation_id is None
def test_none_params_omit_the_key_so_required_params_reject():
with pytest.raises(pydantic.ValidationError) as excinfo:
methods.parse_client_request("tools/call", "2025-11-25", None)
assert [error["loc"] for error in excinfo.value.errors() if error["type"] == "missing"] == [("params",)]
assert isinstance(methods.parse_client_request("ping", "2025-11-25", None), types.PingRequest)
def test_snake_case_spellings_of_required_aliased_fields_reject_as_missing():
"""Wire parsing is alias-only (`by_name=False`), at both the surface and monolith steps."""
snake_params = {"messages": [{"role": "user", "content": {"type": "text", "text": "hi"}}], "max_tokens": 100}
with pytest.raises(pydantic.ValidationError) as excinfo:
methods.parse_server_request("sampling/createMessage", "2025-11-25", snake_params)
assert [error["loc"] for error in excinfo.value.errors() if error["type"] == "missing"] == [("params", "maxTokens")]
with pytest.raises(pydantic.ValidationError):
types.CreateMessageRequest.model_validate(
{"method": "sampling/createMessage", "params": snake_params}, by_name=False
)
def test_extension_map_rows_parse_through_the_same_functions():
extended_surface = {**methods.CLIENT_REQUESTS, ("tasks/get", "2025-11-25"): v2025.GetTaskRequest}
extended_monolith = {**methods.MONOLITH_REQUESTS, "tasks/get": types.GetTaskRequest}
parsed = methods.parse_client_request(
"tasks/get", "2025-11-25", {"taskId": "t1"}, surface=extended_surface, monolith=extended_monolith
)
assert isinstance(parsed, types.GetTaskRequest)
assert parsed.params.task_id == "t1"
def test_inconsistent_extension_maps_raise_runtime_error_after_the_surface_hit():
"""Must not raise `KeyError`: the session layer treats that as the version gate."""
extended_surface = {**methods.CLIENT_REQUESTS, ("tasks/get", "2025-11-25"): v2025.GetTaskRequest}
with pytest.raises(RuntimeError, match="inconsistent extension maps"):
methods.parse_client_request("tasks/get", "2025-11-25", {"taskId": "t1"}, surface=extended_surface)
def test_input_required_unions_discriminate_identically_in_both_arm_orders():
complete_bodies: dict[str, dict[str, Any]] = {
"tools/call": {"content": []},
"prompts/get": {"messages": []},
"resources/read": {"contents": []},
}
shared_bodies: list[dict[str, Any]] = [
{"resultType": "input_required", "inputRequests": {"r1": {"method": "roots/list"}}},
{"resultType": "input_required", "requestState": "blob"},
]
for method, complete_body in complete_bodies.items():
row = methods.MONOLITH_RESULTS[method]
complete_arm, input_required_arm = get_args(row)
assert input_required_arm is types.InputRequiredResult
bodies: list[dict[str, Any]] = [
complete_body,
{**complete_body, "resultType": "complete"},
*shared_bodies,
{**complete_body, "resultType": "task"}, # open tag is preserved
{**complete_body, "resultType": "input_required"}, # complete shape plus the tag
]
for body in bodies:
forward = pydantic.TypeAdapter[Any](complete_arm | input_required_arm).validate_python(body)
reversed_order = pydantic.TypeAdapter[Any](input_required_arm | complete_arm).validate_python(body)
assert type(forward) is type(reversed_order), f"{method}: {body}"
assert forward.result_type == reversed_order.result_type
through_row = pydantic.TypeAdapter[Any](row).validate_python(complete_body)
assert isinstance(through_row, complete_arm)
open_tagged = pydantic.TypeAdapter[Any](row).validate_python({**complete_body, "resultType": "task"})
assert open_tagged.result_type == "task"
def test_sampling_union_keeps_the_complete_arm_first_because_order_is_load_bearing():
"""A single-block body satisfies both arms; smart-union ties resolve leftmost."""
assert get_args(methods.MONOLITH_RESULTS["sampling/createMessage"]) == (
types.CreateMessageResult,
types.CreateMessageResultWithTools,
)
single_block: dict[str, Any] = {"role": "assistant", "content": {"type": "text", "text": "hi"}, "model": "m"}
through_row = methods.parse_client_result("sampling/createMessage", "2025-11-25", single_block)
assert type(through_row) is types.CreateMessageResult
reversed_union = pydantic.TypeAdapter[Any](types.CreateMessageResultWithTools | types.CreateMessageResult)
assert type(reversed_union.validate_python(single_block)) is types.CreateMessageResultWithTools
array_body: dict[str, Any] = {"role": "assistant", "content": [{"type": "text", "text": "hi"}], "model": "m"}
tool_use_body: dict[str, Any] = {
"role": "assistant",
"content": {"type": "tool_use", "name": "t", "id": "c1", "input": {}},
"model": "m",
}
for body in (array_body, tool_use_body):
parsed = methods.parse_client_result("sampling/createMessage", "2025-11-25", body)
assert type(parsed) is types.CreateMessageResultWithTools
def test_validate_functions_accept_reject_and_gate_like_their_parse_siblings():
methods.validate_client_request("tools/call", "2025-11-25", {"name": "echo"})
methods.validate_client_notification("notifications/cancelled", "2025-11-25", {"requestId": 1})
methods.validate_server_result("tools/list", "2025-11-25", {"tools": []})
methods.validate_client_result("roots/list", "2025-11-25", {"roots": []})
with pytest.raises(KeyError):
methods.validate_client_request("custom/greet", "2025-11-25", None)
with pytest.raises(KeyError):
methods.validate_client_notification("custom/ping", "2025-11-25", None)
with pytest.raises(KeyError):
methods.validate_server_result("custom/greet", "2025-11-25", {})
with pytest.raises(KeyError):
methods.validate_client_result("roots/list", "2026-07-28", {})
with pytest.raises(pydantic.ValidationError):
methods.validate_client_request("tools/call", "2025-11-25", None)
with pytest.raises(pydantic.ValidationError):
methods.validate_client_notification("notifications/progress", "2025-11-25", {"progressToken": []})
with pytest.raises(pydantic.ValidationError):
methods.validate_server_result("tools/list", "2025-11-25", {"tools": 42})
with pytest.raises(pydantic.ValidationError):
methods.validate_client_result("roots/list", "2025-11-25", {"roots": 42})
with pytest.raises(ValueError):
methods.validate_client_request("ping", "2099-01-01", None)
# One minimal monolith result instance per request method, dumped via the same
# `_dump_result` path the runner uses. Cacheable results set `ttl_ms`/`cache_scope`
# explicitly because the monolith no longer defaults them and 2026 requires them.
MONOLITH_RESULT_FIXTURES: dict[str, types.Result] = {
"completion/complete": types.CompleteResult(completion=types.Completion(values=[])),
"initialize": types.InitializeResult(
protocol_version="2025-11-25",
capabilities=types.ServerCapabilities(),
server_info=types.Implementation(name="server", version="1.0"),
),
"logging/setLevel": types.EmptyResult(),
"ping": types.EmptyResult(),
"prompts/get": types.GetPromptResult(messages=[]),
"prompts/list": types.ListPromptsResult(prompts=[], ttl_ms=0, cache_scope="private"),
"resources/list": types.ListResourcesResult(resources=[], ttl_ms=0, cache_scope="private"),
"resources/read": types.ReadResourceResult(contents=[], ttl_ms=0, cache_scope="private"),
"resources/subscribe": types.EmptyResult(),
"resources/templates/list": types.ListResourceTemplatesResult(
resource_templates=[], ttl_ms=0, cache_scope="private"
),
"resources/unsubscribe": types.EmptyResult(),
"server/discover": types.DiscoverResult(
supported_versions=["2026-07-28"],
capabilities=types.ServerCapabilities(),
ttl_ms=0,
cache_scope="private",
),
"subscriptions/listen": types.SubscriptionsListenResult.model_validate(
{"_meta": {"io.modelcontextprotocol/subscriptionId": 1}}
),
"tools/call": types.CallToolResult(content=[]),
"tools/list": types.ListToolsResult(tools=[], ttl_ms=0, cache_scope="private"),
}
CACHEABLE_METHODS = frozenset(m for m, r in MONOLITH_RESULT_FIXTURES.items() if isinstance(r, types.CacheableResult))
@pytest.mark.parametrize(("method", "version"), sorted(methods.SERVER_RESULTS))
def test_dumped_monolith_results_round_trip_through_serialize_server_result(method: str, version: str):
"""The outbound sieve must accept every correctly-typed handler return and re-validate."""
instance = MONOLITH_RESULT_FIXTURES[method]
dumped = instance.model_dump(by_alias=True, mode="json", exclude_none=True)
sieved = methods.serialize_server_result(method, version, dumped)
methods.validate_server_result(method, version, sieved)
PRE_2026 = [v for v in KNOWN_PROTOCOL_VERSIONS if v < "2026-07-28"]
@pytest.mark.parametrize(("method", "version"), [k for k in sorted(methods.SERVER_RESULTS) if k[1] in PRE_2026])
def test_serialize_server_result_drops_2026_only_keys_at_pre_2026_versions(method: str, version: str):
instance = MONOLITH_RESULT_FIXTURES[method]
dumped = instance.model_dump(by_alias=True, mode="json", exclude_none=True)
sieved = methods.serialize_server_result(method, version, dumped)
if getattr(instance, "result_type", None) is not None:
assert "resultType" in dumped
assert "resultType" not in sieved
if method in CACHEABLE_METHODS:
assert "ttlMs" in dumped and "cacheScope" in dumped
assert "ttlMs" not in sieved
assert "cacheScope" not in sieved
@pytest.mark.parametrize("version", PRE_2026)
def test_initialize_round_trips_capability_extensions_at_pre_2026_versions(version: str):
extensions = {"io.modelcontextprotocol/ui": {"mimeTypes": ["text/html;profile=mcp-app"]}}
capabilities = {"tools": {}, "extensions": extensions}
result = {"protocolVersion": version, "capabilities": capabilities, "serverInfo": {"name": "S", "version": "1"}}
sieved = methods.serialize_server_result("initialize", version, result)
assert sieved["capabilities"] == capabilities
parsed = methods.parse_server_result("initialize", version, sieved)
assert isinstance(parsed, types.InitializeResult)
assert parsed.capabilities.extensions == extensions
client_info = {"name": "C", "version": "1"}
params = {"protocolVersion": version, "capabilities": {"extensions": extensions}, "clientInfo": client_info}
request = methods.parse_client_request("initialize", version, params)
assert isinstance(request, types.InitializeRequest)
assert request.params.capabilities.extensions == extensions
def test_serialize_server_result_keeps_2026_only_keys_at_2026_07_28():
dumped = MONOLITH_RESULT_FIXTURES["tools/list"].model_dump(by_alias=True, mode="json", exclude_none=True)
sieved = methods.serialize_server_result("tools/list", "2026-07-28", dumped)
assert sieved["resultType"] == "complete"
assert sieved["ttlMs"] == 0
assert sieved["cacheScope"] == "private"
@pytest.mark.parametrize("version", KNOWN_PROTOCOL_VERSIONS)
def test_serialize_server_result_preserves_arbitrary_meta_value_identically(version: str):
meta = {"custom-key": 1, "modelcontextprotocol.io/foo": "bar"}
dumped: dict[str, Any] = {"tools": [], "resultType": "complete", "ttlMs": 0, "cacheScope": "private", "_meta": meta}
sieved = methods.serialize_server_result("tools/list", version, dumped)
assert sieved["_meta"] == meta
def test_serialize_server_result_preserves_open_type_extras():
"""`inputSchema` and nested `_meta` are open key-value bags; the sieve must not strip them."""
input_schema = {"type": "object", "title": "X", "additionalProperties": False, "$defs": {"Y": {"type": "string"}}}
nested_meta = {"com.example/tag": "v"}
tool = {"name": "echo", "inputSchema": input_schema, "_meta": nested_meta}
sieved = methods.serialize_server_result("tools/list", "2025-11-25", {"tools": [tool]})
assert sieved["tools"][0]["inputSchema"] == input_schema
assert sieved["tools"][0]["_meta"] == nested_meta
@pytest.mark.parametrize("input_schema", [{}, {"type": "array"}])
def test_serialize_server_result_rejects_invalid_tool_input_schema(input_schema: dict[str, Any]) -> None:
"""The 2026 spec requires a tool's input schema to declare `type="object"`, even though it allows extra keys."""
result = {
"tools": [{"name": "echo", "inputSchema": input_schema}],
"resultType": "complete",
"ttlMs": 0,
"cacheScope": "private",
}
with pytest.raises(pydantic.ValidationError):
methods.serialize_server_result("tools/list", "2026-07-28", result)
def test_serialize_server_result_drops_top_level_server_info_on_discover_but_keeps_the_meta_stamp():
"""Server identity moved from the discover body to result `_meta` (spec PR #3002):
the sieve drops the removed body key and preserves the `_meta` stamp."""
stamp = {"name": "server", "version": "1.0"}
dumped: dict[str, Any] = {
"supportedVersions": ["2026-07-28"],
"capabilities": {},
"serverInfo": stamp,