Contains field for schema

As per: https://datatracker.ietf.org/doc/html/draft-bhutton-json-schema-00#section-10.3.1.1

Author: kevindew

json-schema-for-3.1.md

@@ -83,7 +83,7 @@ dependentSchemas - map of schemas - somewhat complex, is it related to dependent
 
 prefixItems: array of schema - done
 items: array of schema - in 3.0
-contains: schema
+contains: schema - done
 
 properties: object, each value json schema - in 3.0
 patternProperties: object each value JSON schema

lib/openapi3_parser/node/schema/v3_1.rb

@@ -74,6 +74,11 @@ def else
         def prefix_items
           self["prefixItems"]
         end
+
+        # @return [Schema, nil]
+        def contains
+          self["contains"]
+        end
       end
     end
   end

lib/openapi3_parser/node_factory/schema/v3_1.rb

@@ -33,6 +33,7 @@ class V3_1 < NodeFactory::Object # rubocop:disable Naming/ClassAndModuleCamelCas
         field "then", factory: :referenceable_schema
         field "else", factory: :referenceable_schema
         field "prefixItems", factory: :prefix_items_factory
+        field "contains", factory: :referenceable_schema
 
         def build_node(data, node_context)
           Node::Schema::V3_1.new(data, node_context)

spec/support/examples/v3.1/changes.yaml

@@ -86,27 +86,27 @@ components:
     #   exclusiveMaximum: 111
     #   minimum: 10
     #   exclusiveMinimum: 9
-    # String:
-    #   type: string
-    #   maxLength: 10
-    #   minLength: 5
-    #   pattern: "[a-z]*"
-    # Array:
-    #   type: array
-    #   maxItems: 10
-    #   minItems: 1
-    #   uniqueItems: true
-    #   contains:
-    #     const: "test"
-    #   minContains: 1
-    #   maxContains: 1
-    #   prefixItems:
-    #     - const: "item"
-    #       type: string
-    #   items:
-    #     type: string
-    #   unevaluatedItems:
-    #     type: string
+    String:
+      type: string
+      maxLength: 10
+      minLength: 5
+      pattern: "[a-z]*"
+    Array:
+      type: array
+      maxItems: 10
+      minItems: 1
+      uniqueItems: true
+      contains:
+        const: "test"
+      minContains: 1
+      maxContains: 1
+      prefixItems:
+        - const: "item"
+          type: string
+      items:
+        type: string
+      unevaluatedItems:
+        type: string
      # Add object
      # Add content types
      # Add $ref usage (plain, merged, defs)