Merge branch '5.3.x'

spring-webflux/src/test/java/org/springframework/web/reactive/function/server/support/RouterFunctionMappingTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,6 +20,7 @@ import org.junit.jupiter.api.Test;
 import reactor.core.publisher.Mono;
 import reactor.test.StepVerifier;
 
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.http.codec.ServerCodecConfigurer;
 import org.springframework.web.reactive.HandlerMapping;
 import org.springframework.web.reactive.function.server.HandlerFunction;
@@ -72,6 +73,23 @@ class RouterFunctionMappingTests {
 				.verify();
 	}
 
+	@Test
+	void empty() throws Exception {
+		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
+		context.refresh();
+
+		RouterFunctionMapping mapping = new RouterFunctionMapping();
+		mapping.setMessageReaders(this.codecConfigurer.getReaders());
+		mapping.setApplicationContext(context);
+		mapping.afterPropertiesSet();
+
+		Mono<Object> result = mapping.getHandler(createExchange("https://example.com/match"));
+
+		StepVerifier.create(result)
+				.expectComplete()
+				.verify();
+	}
+
 	@Test
 	void changeParser() throws Exception {
 		HandlerFunction<ServerResponse> handlerFunction = request -> ServerResponse.ok().build();