test: Add tests for McpServerObjectMapperAutoConfiguration

auto-configurations/mcp/spring-ai-autoconfigure-mcp-server-common/src/test/java/org/springframework/ai/mcp/server/common/autoconfigure/McpServerObjectMapperAutoConfigurationIT.java

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+/*
+ * Copyright 2025-2025 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.ai.mcp.server.common.autoconfigure;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.boot.autoconfigure.AutoConfigurations;
+import org.springframework.boot.context.annotation.UserConfigurations;
+import org.springframework.boot.test.context.runner.ApplicationContextRunner;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Integration tests for {@link McpServerObjectMapperAutoConfiguration}
+ *
+ * @author guan xu
+ */
+public class McpServerObjectMapperAutoConfigurationIT {
+
+	private final ApplicationContextRunner contextRunner = new ApplicationContextRunner()
+		.withConfiguration(AutoConfigurations.of(McpServerObjectMapperAutoConfiguration.class));
+
+	@Test
+	void defaultMcpServerObjectMapper() {
+		this.contextRunner.run(context -> {
+			assertThat(context).hasSingleBean(ObjectMapper.class);
+			assertThat(context).hasBean("mcpServerObjectMapper");
+		});
+	}
+
+	@Test
+	void customizeMcpServerObjectMapper() {
+		this.contextRunner.withConfiguration(UserConfigurations.of(TestConfig.class)).run(context -> {
+			assertThat(context).hasSingleBean(ObjectMapper.class);
+			assertThat(context).hasBean("mcpServerObjectMapper");
+
+			var mcpServerObjectMapper = context.getBean("mcpServerObjectMapper", ObjectMapper.class);
+			var customizeMcpServerObjectMapper = context.getBean(TestConfig.class).mcpServerObjectMapper();
+			assertThat(customizeMcpServerObjectMapper).isSameAs(mcpServerObjectMapper);
+		});
+	}
+
+	@Configuration
+	static class TestConfig {
+
+		@Bean(name = "mcpServerObjectMapper")
+		ObjectMapper mcpServerObjectMapper() {
+			return new ObjectMapper();
+		}
+
+	}
+
+}