fix: check if there is a payload by checking the http method

fix: check if there is a payload by checking the http method instead of payloadRequired because that field is not always correctly initialized during unit test
Signed-off-by: Lionel Schiepers <lionel.schiepers@belgiantrain.be>

Author: Lionel Schiepers

packages/openapi-to-graphql/src/resolver_builder.ts

@@ -459,8 +459,12 @@ export function getResolver<TSource, TContext, TArgs>({
      *
      * NOTE: This may cause the user to encounter unexpected changes
      */
-    if (operation.payloadRequired)
+    if (operation.method !== 'get')
     {
+       /**
+        * the check is done on the 'get' operation to determine if there is a payload because
+        * operation.payloadRequired is not always correctly initialized (at least during the unit test)
+        */
       headers['content-type'] =
         typeof operation.payloadContentType !== 'undefined'
           ? operation.payloadContentType