fix DateSchema enum and default serialization

Author: frantuma

modules/swagger-core/src/main/java/io/swagger/v3/core/jackson/mixin/DateSchemaMixin.java

@@ -10,6 +10,12 @@ public abstract class DateSchemaMixin {
     @JsonFormat (shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd")
     public abstract Object getExample();
 
+    @JsonFormat (shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd")
+    public abstract Object getDefault();
+
+    @JsonFormat (shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd")
+    public abstract Object getEnum();
+
     @JsonIgnore
     public abstract Object getJsonSchemaImpl();
 

modules/swagger-core/src/test/java/io/swagger/v3/core/deserialization/JsonDeserializationTest.java

@@ -542,4 +542,46 @@ public void testExampleDeserializationOnMediaType() throws Exception {
         assertTrue(openAPI.getPaths().get("/pet").getPost().getRequestBody().getContent().get("application/json").getExampleSetFlag());
     }
 
+    @Test
+    public void testDateSchemaSerialization() throws Exception {
+        String content = FileUtils.readFileToString(new File("src/test/resources/dateSchema.yaml"), "UTF-8");
+        OpenAPI openAPI = Yaml.mapper().readValue(content, OpenAPI.class);
+        Yaml.prettyPrint(openAPI);
+        SerializationMatchers.assertEqualsToYaml(openAPI, "openapi: 3.0.3\n" +
+                "info:\n" +
+                "  title: Simple Inventory API\n" +
+                "  version: 1.0.0\n" +
+                "paths:\n" +
+                "  /inventory:\n" +
+                "    get:\n" +
+                "      operationId: searchInventory\n" +
+                "      parameters:\n" +
+                "      - name: test\n" +
+                "        in: header\n" +
+                "        schema:\n" +
+                "          type: string\n" +
+                "          format: date\n" +
+                "          enum:\n" +
+                "          - 2023-12-12\n" +
+                "          default: 2023-12-12\n" +
+                "      responses:\n" +
+                "        \"200\":\n" +
+                "          description: search results matching criteria\n" +
+                "          content:\n" +
+                "            application/json:\n" +
+                "              schema:\n" +
+                "                type: array\n" +
+                "                items:\n" +
+                "                  $ref: \"#/components/schemas/InventoryItem\"\n" +
+                "components:\n" +
+                "  schemas:\n" +
+                "    InventoryItem:\n" +
+                "      type: object\n" +
+                "      properties:\n" +
+                "        releaseDate:\n" +
+                "          type: string\n" +
+                "          format: date-time\n" +
+                "          example: 2016-08-29T09:12:33.001Z");
+    }
+
 }

modules/swagger-core/src/test/resources/dateSchema.yaml

@@ -0,0 +1,35 @@
+openapi: 3.0.3
+info:
+  version: "1.0.0"
+  title: Simple Inventory API
+paths:
+  /inventory:
+    get:
+      operationId: searchInventory
+      parameters:
+        - in: header
+          name: test
+          schema:
+            type: string
+            format: date
+            enum:
+              - 2023-12-12
+            default: 2023-12-12
+      responses:
+        '200':
+          description: search results matching criteria
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: '#/components/schemas/InventoryItem'
+components:
+  schemas:
+    InventoryItem:
+      type: object
+      properties:
+        releaseDate:
+          type: string
+          format: date-time
+          example: '2016-08-29T09:12:33.001Z'