feat: add format validation

.changeset/angry-taxis-share.md

@@ -0,0 +1,6 @@
+---
+"@redocly/openapi-core": minor
+"@redocly/cli": minor
+---
+
+Added validation for JSON Schema format.

__tests__/lint/validate-schema-formats/openapi.yaml

@@ -0,0 +1,67 @@
+openapi: 3.1.0
+info:
+  title: Test format validation
+  version: 1.0.0
+paths:
+  /test:
+    get:
+      responses:
+        200:
+          description: Validate formats using $refs.
+          content:
+            application/json:
+              schema:
+                type: string
+                format: date-time
+              examples:
+                Correct:
+                  $ref: '#/components/examples/DateTime'
+                Incorrect:
+                  $ref: '#/components/examples/Date'
+
+components:
+  schemas:
+    Date:
+      type: string
+      format: date
+      examples:
+        - '2000-01-01' # correct
+        - 2000 # incorrect type
+        - incorrect
+    Email:
+      description: Email address for ticket purchaser.
+      type: string
+      format: email
+      examples:
+        - [email protected] # correct
+        - wrong.format
+    Id:
+      type: string
+      format: uuid
+      examples:
+        - 3be6453c-03eb-4357-ae5a-984a0e574a54 # correct
+        - incorrect
+        - 42 # wrong type
+    Time:
+      type: string
+      pattern: '^([01]\d|2[0-3]):?([0-5]\d)$'
+      description: Time the museum opens on a specific date. Uses 24 hour time format (`HH:mm`).
+      examples:
+        - 09:00 # correct
+        - incorrect
+        - 09.00 # wrong type
+    Oneof:
+      type: string
+      oneOf:
+        - format: date
+        - pattern: ^(month|year)ly$
+      examples:
+        - '2000-01-01' # correct
+        - monthly # correct
+        - wrong
+
+  examples:
+    Date:
+      value: '2000-01-01'
+    DateTime:
+      value: '2000-01-01T12:00:00Z'

__tests__/lint/validate-schema-formats/redocly.yaml

@@ -0,0 +1,9 @@
+apis:
+  main:
+    root: openapi.yaml
+
+rules:
+  no-invalid-parameter-examples: error
+  no-invalid-media-type-examples: error
+  no-invalid-schema-examples: error
+  no-unresolved-refs: error

__tests__/lint/validate-schema-formats/snapshot.js

@@ -0,0 +1,188 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`E2E lint validate-schema-formats 1`] = `
+
+validating openapi.yaml...
+[1] openapi.yaml:65:14 at #/components/examples/Date/value
+
+Example value must conform to the schema: must match format "date-time".
+
+63 | examples:
+64 |   Date:
+65 |     value: '2000-01-01'
+   |            ^^^^^^^^^^^^
+66 |   DateTime:
+67 |     value: '2000-01-01T12:00:00Z'
+
+referenced from openapi.yaml:13:15 at #/paths/~1test/get/responses/200/content/application~1json 
+
+Error was generated by the no-invalid-media-type-examples rule.
+
+
+[2] openapi.yaml:29:11 at #/components/schemas/Date/examples/1
+
+Example value must conform to the schema: type must be string.
+
+27 |   examples:
+28 |     - '2000-01-01' # correct
+29 |     - 2000 # incorrect type
+   |       ^^^^
+30 |     - incorrect
+31 | Email:
+
+referenced from openapi.yaml:25:7 at #/components/schemas/Date 
+
+Error was generated by the no-invalid-schema-examples rule.
+
+
+[3] openapi.yaml:30:11 at #/components/schemas/Date/examples/2
+
+Example value must conform to the schema: must match format "date".
+
+28 |     - '2000-01-01' # correct
+29 |     - 2000 # incorrect type
+30 |     - incorrect
+   |       ^^^^^^^^^
+31 | Email:
+32 |   description: Email address for ticket purchaser.
+
+referenced from openapi.yaml:25:7 at #/components/schemas/Date 
+
+Error was generated by the no-invalid-schema-examples rule.
+
+
+[4] openapi.yaml:37:11 at #/components/schemas/Email/examples/1
+
+Example value must conform to the schema: must match format "email".
+
+35 |   examples:
+36 |     - [email protected] # correct
+37 |     - wrong.format
+   |       ^^^^^^^^^^^^
+38 | Id:
+39 |   type: string
+
+referenced from openapi.yaml:32:7 at #/components/schemas/Email 
+
+Error was generated by the no-invalid-schema-examples rule.
+
+
+[5] openapi.yaml:43:11 at #/components/schemas/Id/examples/1
+
+Example value must conform to the schema: must match format "uuid".
+
+41 |   examples:
+42 |     - 3be6453c-03eb-4357-ae5a-984a0e574a54 # correct
+43 |     - incorrect
+   |       ^^^^^^^^^
+44 |     - 42 # wrong type
+45 | Time:
+
+referenced from openapi.yaml:39:7 at #/components/schemas/Id 
+
+Error was generated by the no-invalid-schema-examples rule.
+
+
+[6] openapi.yaml:44:11 at #/components/schemas/Id/examples/2
+
+Example value must conform to the schema: type must be string.
+
+42 |     - 3be6453c-03eb-4357-ae5a-984a0e574a54 # correct
+43 |     - incorrect
+44 |     - 42 # wrong type
+   |       ^^
+45 | Time:
+46 |   type: string
+
+referenced from openapi.yaml:39:7 at #/components/schemas/Id 
+
+Error was generated by the no-invalid-schema-examples rule.
+
+
+[7] openapi.yaml:51:11 at #/components/schemas/Time/examples/1
+
+Example value must conform to the schema: must match pattern "^([01]\\d|2[0-3]):?([0-5]\\d)$".
+
+49 |   examples:
+50 |     - 09:00 # correct
+51 |     - incorrect
+   |       ^^^^^^^^^
+52 |     - 09.00 # wrong type
+53 | Oneof:
+
+referenced from openapi.yaml:46:7 at #/components/schemas/Time 
+
+Error was generated by the no-invalid-schema-examples rule.
+
+
+[8] openapi.yaml:52:11 at #/components/schemas/Time/examples/2
+
+Example value must conform to the schema: type must be string.
+
+50 |     - 09:00 # correct
+51 |     - incorrect
+52 |     - 09.00 # wrong type
+   |       ^^^^^
+53 | Oneof:
+54 |   type: string
+
+referenced from openapi.yaml:46:7 at #/components/schemas/Time 
+
+Error was generated by the no-invalid-schema-examples rule.
+
+
+[9] openapi.yaml:61:11 at #/components/schemas/Oneof/examples/2
+
+Example value must conform to the schema: must match format "date".
+
+59 |       - '2000-01-01' # correct
+60 |       - monthly # correct
+61 |       - wrong
+   |         ^^^^^
+62 |
+63 | examples:
+
+referenced from openapi.yaml:54:7 at #/components/schemas/Oneof 
+
+Error was generated by the no-invalid-schema-examples rule.
+
+
+[10] openapi.yaml:61:11 at #/components/schemas/Oneof/examples/2
+
+Example value must conform to the schema: must match pattern "^(month|year)ly$".
+
+59 |       - '2000-01-01' # correct
+60 |       - monthly # correct
+61 |       - wrong
+   |         ^^^^^
+62 |
+63 | examples:
+
+referenced from openapi.yaml:54:7 at #/components/schemas/Oneof 
+
+Error was generated by the no-invalid-schema-examples rule.
+
+
+[11] openapi.yaml:61:11 at #/components/schemas/Oneof/examples/2
+
+Example value must conform to the schema: must match exactly one schema in oneOf.
+
+59 |       - '2000-01-01' # correct
+60 |       - monthly # correct
+61 |       - wrong
+   |         ^^^^^
+62 |
+63 | examples:
+
+referenced from openapi.yaml:54:7 at #/components/schemas/Oneof 
+
+Error was generated by the no-invalid-schema-examples rule.
+
+
+openapi.yaml: validated in <test>ms
+
+❌ Validation failed with 11 errors.
+run \`redocly lint --generate-ignore-file\` to add all problems to the ignore file.
+
+
+`;