add tests for delegate

Author: Picazsoo

modules/openapi-generator/src/main/resources/kotlin-spring/apiDelegate.mustache

@@ -34,7 +34,8 @@ interface {{classname}}Delegate {
      * @see {{classname}}#{{operationId}}
      */
     {{#reactive}}{{^isArray}}suspend {{/isArray}}{{#isArray}}{{^useFlowForArrayReturnType}}suspend {{/useFlowForArrayReturnType}}{{/isArray}}{{/reactive}}fun {{operationId}}({{#allParams}}{{{paramName}}}: {{^reactive}}{{>optionalDataType}}{{/reactive}}{{#reactive}}{{^isArray}}{{>optionalDataType}}{{/isArray}}{{#isArray}}{{#isBodyParam}}Flow<{{{baseType}}}>{{/isBodyParam}}{{^isBodyParam}}{{>optionalDataType}}{{/isBodyParam}}{{/isArray}}{{/reactive}}{{^-last}},
-        {{/-last}}{{/allParams}}{{#includeHttpRequestContext}}{{#hasParams}}, {{/hasParams}}{{#swagger1AnnotationLibrary}}@ApiParam(hidden = true) {{/swagger1AnnotationLibrary}}{{#swagger2AnnotationLibrary}}@Parameter(hidden = true) {{/swagger2AnnotationLibrary}}{{#reactive}}exchange: org.springframework.web.server.ServerWebExchange{{/reactive}}{{^reactive}}request: {{javaxPackage}}.servlet.http.HttpServletRequest{{/reactive}}{{/includeHttpRequestContext}}): {{#responseWrapper}}{{.}}<{{/responseWrapper}}ResponseEntity<{{>returnTypes}}>{{#responseWrapper}}>{{/responseWrapper}}{{^skipDefaultDelegateInterface}} {
+        {{/-last}}{{/allParams}}{{#includeHttpRequestContext}}{{#hasParams}},
+        {{/hasParams}}{{#reactive}}exchange: org.springframework.web.server.ServerWebExchange{{/reactive}}{{^reactive}}request: {{javaxPackage}}.servlet.http.HttpServletRequest{{/reactive}}{{/includeHttpRequestContext}}): {{#responseWrapper}}{{.}}<{{/responseWrapper}}ResponseEntity<{{>returnTypes}}>{{#responseWrapper}}>{{/responseWrapper}}{{^skipDefaultDelegateInterface}} {
         {{>methodBody}}{{! prevent indent}}
     }{{/skipDefaultDelegateInterface}}