Verify @⁠MockitoBean can replace beans that have @⁠Async methods

See gh-33742

Author: sbrannen

spring-test/src/test/java/org/springframework/test/context/bean/override/mockito/MockitoBeanAndAsyncInterfaceMethodTests.java

@@ -0,0 +1,93 @@
+/*
+ * Copyright 2012-2024 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.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.test.context.bean.override.mockito;
+
+import java.util.concurrent.CompletableFuture;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Mockito;
+
+import org.springframework.aop.support.AopUtils;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.scheduling.annotation.Async;
+import org.springframework.scheduling.annotation.EnableAsync;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+import static java.util.concurrent.CompletableFuture.completedFuture;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.BDDMockito.given;
+
+/**
+ * Tests for {@link MockitoBean @MockitoBean} where the mocked interface has an
+ * {@link Async @Async} method.
+ *
+ * @author Sam Brannen
+ * @author Andy Wilkinson
+ * @since 6.2
+ */
+@ExtendWith(SpringExtension.class)
+public class MockitoBeanAndAsyncInterfaceMethodTests {
+
+	@MockitoBean
+	Transformer transformer;
+
+	@Autowired
+	MyService service;
+
+
+	@Test
+	void mockedMethodsAreNotAsync() throws Exception {
+		assertThat(AopUtils.isAopProxy(transformer)).as("is Spring AOP proxy").isFalse();
+		assertThat(Mockito.mockingDetails(transformer).isMock()).as("is Mockito mock").isTrue();
+
+		given(transformer.transform("foo")).willReturn(completedFuture("bar"));
+		assertThat(service.transform("foo")).isEqualTo("result: bar");
+	}
+
+
+	interface Transformer {
+
+		@Async
+		CompletableFuture<String> transform(String input);
+	}
+
+	record MyService(Transformer transformer) {
+
+		String transform(String input) throws Exception {
+			return "result: " + this.transformer.transform(input).get();
+		}
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	@EnableAsync
+	static class Config {
+
+		@Bean
+		Transformer transformer() {
+			return input -> completedFuture(input.toUpperCase());
+		}
+
+		@Bean
+		MyService myService(Transformer transformer) {
+			return new MyService(transformer);
+		}
+	}
+
+}