test: increase MCP client timeout to 20s and enable tests

- Doubles the default timeout from 10s to 20s in McpAsyncClient
- Updates corresponding timeout values in test classes
- Enables previously disabled async client tests

Author: tzolov

spring-ai-mcp-core/src/main/java/org/springframework/ai/mcp/client/McpAsyncClient.java

@@ -40,7 +40,7 @@ public class McpAsyncClient extends DefaultMcpSession {
 	};
 
 	public McpAsyncClient(McpTransport transport) {
-		this(transport, Duration.ofSeconds(10), new ObjectMapper());
+		this(transport, Duration.ofSeconds(20), new ObjectMapper());
 	}
 
 	public McpAsyncClient(McpTransport transport, Duration requestTimeout, ObjectMapper objectMapper) {

spring-ai-mcp-core/src/test/java/org/springframework/ai/mcp/client/McpAsyncClientTests.java

@@ -22,7 +22,6 @@
 import com.fasterxml.jackson.databind.ObjectMapper;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.Timeout;
 import reactor.test.StepVerifier;
@@ -45,15 +44,14 @@
  * @author Christian Tzolov
  * @author Dariusz Jędrzejczyk
  */
-@Disabled
 @Timeout(15) // Giving extra time beyond the client timeout
 class McpAsyncClientTests {
 
 	private McpAsyncClient mcpAsyncClient;
 
 	private ServerParameters stdioParams;
 
-	private static final Duration TIMEOUT = Duration.ofSeconds(10);
+	private static final Duration TIMEOUT = Duration.ofSeconds(20);
 
 	private static final String TEST_MESSAGE = "Hello MCP Spring AI!";
 
@@ -144,7 +142,6 @@ void testListResources() {
 		}).verifyComplete();
 	}
 
-	@Disabled
 	@Test
 	void testMcpAsyncClientState() {
 		assertThat(mcpAsyncClient).isNotNull();

spring-ai-mcp-core/src/test/java/org/springframework/ai/mcp/client/McpSyncClientTests.java

@@ -52,7 +52,7 @@ class McpSyncClientTests {
 
 	private ServerParameters stdioParams;
 
-	private static final Duration TIMEOUT = Duration.ofSeconds(10);
+	private static final Duration TIMEOUT = Duration.ofSeconds(20);
 
 	private static final String TEST_MESSAGE = "Hello MCP Spring AI!";