Merge pull request #1118 from microsoft/revert-1102-is/fix-date-serialization

Revert "Serialize `OpenApiDate` values properly to short date"

Author: MaggieKimani1

src/Microsoft.OpenApi/Any/OpenApiPrimitive.cs

@@ -118,7 +118,7 @@ public void Write(IOpenApiWriter writer, OpenApiSpecVersion specVersion)
 
                 case PrimitiveType.Date:
                     var dateValue = (OpenApiDate)(IOpenApiPrimitive)this;
-                    writer.WriteValue(dateValue.Value.ToShortDateString());
+                    writer.WriteValue(dateValue.Value.ToString("o").Substring(0, 10));
                     break;
 
                 case PrimitiveType.DateTime:

test/Microsoft.OpenApi.Tests/Models/OpenApiExampleTests.SerializeReferencedExampleAsV3JsonWithoutReferenceWorks_produceTerseOutput=False.verified.txt

@@ -22,6 +22,6 @@
         ]
       }
     ],
-    "aDate": "12/12/2022"
+    "aDate": "2022-12-12"
   }
 }

test/Microsoft.OpenApi.Tests/Models/OpenApiExampleTests.SerializeReferencedExampleAsV3JsonWithoutReferenceWorks_produceTerseOutput=True.verified.txt

@@ -1 +1 @@
-{"value":{"versions":[{"status":"Status1","id":"v1","links":[{"href":"http://example.com/1","rel":"sampleRel1"}]},{"status":"Status2","id":"v2","links":[{"href":"http://example.com/2","rel":"sampleRel2"}]}],"aDate":"12/12/2022"}}
+{"value":{"versions":[{"status":"Status1","id":"v1","links":[{"href":"http://example.com/1","rel":"sampleRel1"}]},{"status":"Status2","id":"v2","links":[{"href":"http://example.com/2","rel":"sampleRel2"}]}],"aDate":"2022-12-12"}}