Exception during WebFlux tests: NoClassDefFoundError: KotlinModule$Builder. Fixes #2114

Author: bnasslahsen

springdoc-openapi-starter-common/src/main/java/org/springdoc/core/configuration/SpringDocJacksonKotlinModuleConfiguration.java

@@ -0,0 +1,30 @@
+package org.springdoc.core.configuration;
+
+import com.fasterxml.jackson.module.kotlin.KotlinModule;
+import com.fasterxml.jackson.module.kotlin.KotlinModule.Builder;
+import org.springdoc.core.providers.ObjectMapperProvider;
+
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Lazy;
+
+/**
+ * The type Spring doc kotlin module configuration.
+ *
+ * @author bnasslahsen
+ */
+@Lazy(false)
+@Configuration(proxyBeanMethods = false)
+@ConditionalOnClass(KotlinModule.class)
+class SpringDocJacksonKotlinModuleConfiguration {
+
+	/**
+	 * Instantiates a new Spring doc kotlin module configuration.
+	 *
+	 * @param objectMapperProvider the object mapper provider
+	 */
+	public SpringDocJacksonKotlinModuleConfiguration(ObjectMapperProvider objectMapperProvider) {
+		objectMapperProvider.jsonMapper()
+				.registerModule(new Builder().build());
+	}
+}

springdoc-openapi-starter-common/src/main/java/org/springdoc/core/configuration/SpringDocKotlinConfiguration.kt

@@ -1,6 +1,5 @@
 package org.springdoc.core.configuration
 
-import com.fasterxml.jackson.module.kotlin.KotlinModule
 import io.swagger.v3.oas.annotations.Parameter
 import io.swagger.v3.oas.models.media.ByteArraySchema
 import org.springdoc.core.customizers.ParameterCustomizer
@@ -43,15 +42,6 @@ open class SpringDocKotlinConfiguration(objectMapperProvider: ObjectMapperProvid
 	 * @param objectMapperProvider Object Mapper Provider
 	 * @return the nullable Kotlin Request Parameter Customizer
 	 */
-	@Lazy(false)
-	@Configuration(proxyBeanMethods = false)
-	@ConditionalOnClass(KotlinModule::class)
-	class SpringDocKotlinModuleConfiguration(objectMapperProvider: ObjectMapperProvider) {
-		init {
-			objectMapperProvider.jsonMapper()
-				.registerModule(KotlinModule.Builder().build())
-		}
-	}
 
 	/**
 	 * Instantiates a new Spring doc kotlin configuration.

springdoc-openapi-starter-common/src/main/resources/META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports

@@ -10,4 +10,5 @@ org.springdoc.core.configuration.SpringDocPageableConfiguration
 org.springdoc.core.configuration.SpringDocSortConfiguration
 org.springdoc.core.configuration.SpringDocDataRestConfiguration
 org.springdoc.core.configuration.SpringDocKotlinConfiguration
-org.springdoc.core.configuration.SpringDocKotlinxConfiguration
+org.springdoc.core.configuration.SpringDocKotlinxConfiguration
+org.springdoc.core.configuration.SpringDocJacksonKotlinModuleConfiguration

springdoc-openapi-tests/springdoc-openapi-actuator-webflux-tests/src/test/java/test/org/springdoc/api/app144/SpringDocApp144Test.java

@@ -31,9 +31,9 @@
 
 @SpringBootTest(webEnvironment = WebEnvironment.DEFINED_PORT,
 		properties = { "management.endpoints.web.exposure.include:*",
-				"server.port=52554",
+				"server.port=52555",
 				"springdoc.use-management-port=true",
-				"management.server.port=9290",
+				"management.server.port=9289",
 				"management.endpoints.web.base-path=/application" })
 public class SpringDocApp144Test extends AbstractSpringDocActuatorTest {
 

springdoc-openapi-tests/springdoc-openapi-actuator-webflux-tests/src/test/resources/results/app144.json

@@ -6,7 +6,7 @@
   },
   "servers": [
     {
-      "url": "http://localhost:52554",
+      "url": "http://localhost:52555",
       "description": "Generated server url"
     }
   ],