Add default json dialect to model (#2163)

Co-authored-by: Michael Edgar <michael@xlate.io>

Author: Azquelt

core/src/test/java/io/smallrye/openapi/runtime/io/OpenApiParserAndSerializerTest.java

@@ -611,6 +611,11 @@ void testSchemas_XML() throws IOException, JSONException {
         doMultiVersionTest("schemas-with-xml.json", "schemas-with-xml30.json", ConversionDirection.BOTH_WAYS);
     }
 
+    @Test
+    void testNonDefaultSchemaDialect() throws IOException, JSONException {
+        doTest("non-default-schema-dialect.json", Format.JSON);
+    }
+
     /**
      * Test method for {@link OpenApiParser#parse(java.net.URL)}.
      */

core/src/test/resources/io/smallrye/openapi/runtime/io/non-default-schema-dialect.json

@@ -0,0 +1,28 @@
+{
+  "openapi" : "3.1.0",
+  "info" : {
+    "title": "Sample App",
+    "version": "1.0.1"
+  },
+  "jsonSchemaDialect": "http://example.com/test-dialect",
+  "components": {
+    "schemas": {
+      "testSchema": {
+        "type": 4,
+        "fields": ["a", "b", "c"]
+      },
+      "baseDialectSchema": {
+        "$schema": "https://spec.openapis.org/oas/3.1/dialect/base",
+        "type": "object",
+        "properties": {
+          "a": {
+            "type": "string"
+          },
+          "b": {
+            "type": "integer"
+          }
+        }
+      }
+    }
+  }
+}