Use static container in all client and transport tests (#531)

- This allows reusing the containerized MCP server for all tests in a
  single class, significantly speeding up the tests, roughly 10x.

Signed-off-by: Daniel Garnier-Moiroux <git@garnier.wf>

mcp-spring/mcp-spring-webflux/src/test/java/io/modelcontextprotocol/client/WebClientStreamableHttpAsyncClientTests.java

@@ -4,6 +4,8 @@
 
 package io.modelcontextprotocol.client;
 
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Timeout;
 import org.springframework.web.reactive.function.client.WebClient;
 import org.testcontainers.containers.GenericContainer;
@@ -19,7 +21,7 @@ public class WebClientStreamableHttpAsyncClientTests extends AbstractMcpAsyncCli
 
 	// Uses the https://github.com/tzolov/mcp-everything-server-docker-image
 	@SuppressWarnings("resource")
-	GenericContainer<?> container = new GenericContainer<>("docker.io/tzolov/mcp-everything-server:v2")
+	static GenericContainer<?> container = new GenericContainer<>("docker.io/tzolov/mcp-everything-server:v2")
 		.withCommand("node dist/index.js streamableHttp")
 		.withLogConsumer(outputFrame -> System.out.println(outputFrame.getUtf8String()))
 		.withExposedPorts(3001)
@@ -30,15 +32,15 @@ public class WebClientStreamableHttpAsyncClientTests extends AbstractMcpAsyncCli
 		return WebClientStreamableHttpTransport.builder(WebClient.builder().baseUrl(host)).build();
 	}
 
-	@Override
-	protected void onStart() {
+	@BeforeAll
+	static void startContainer() {
 		container.start();
 		int port = container.getMappedPort(3001);
 		host = "http://" + container.getHost() + ":" + port;
 	}
 
-	@Override
-	public void onClose() {
+	@AfterAll
+	static void stopContainer() {
 		container.stop();
 	}
 

mcp-spring/mcp-spring-webflux/src/test/java/io/modelcontextprotocol/client/WebClientStreamableHttpSyncClientTests.java

@@ -4,6 +4,8 @@
 
 package io.modelcontextprotocol.client;
 
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Timeout;
 import org.springframework.web.reactive.function.client.WebClient;
 import org.testcontainers.containers.GenericContainer;
@@ -19,7 +21,7 @@ public class WebClientStreamableHttpSyncClientTests extends AbstractMcpSyncClien
 
 	// Uses the https://github.com/tzolov/mcp-everything-server-docker-image
 	@SuppressWarnings("resource")
-	GenericContainer<?> container = new GenericContainer<>("docker.io/tzolov/mcp-everything-server:v2")
+	static GenericContainer<?> container = new GenericContainer<>("docker.io/tzolov/mcp-everything-server:v2")
 		.withCommand("node dist/index.js streamableHttp")
 		.withLogConsumer(outputFrame -> System.out.println(outputFrame.getUtf8String()))
 		.withExposedPorts(3001)
@@ -30,15 +32,15 @@ public class WebClientStreamableHttpSyncClientTests extends AbstractMcpSyncClien
 		return WebClientStreamableHttpTransport.builder(WebClient.builder().baseUrl(host)).build();
 	}
 
-	@Override
-	protected void onStart() {
+	@BeforeAll
+	static void startContainer() {
 		container.start();
 		int port = container.getMappedPort(3001);
 		host = "http://" + container.getHost() + ":" + port;
 	}
 
-	@Override
-	public void onClose() {
+	@AfterAll
+	static void stopContainer() {
 		container.stop();
 	}
 

mcp-spring/mcp-spring-webflux/src/test/java/io/modelcontextprotocol/client/WebFluxSseMcpAsyncClientTests.java

@@ -6,6 +6,8 @@ package io.modelcontextprotocol.client;
 
 import java.time.Duration;
 
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Timeout;
 import org.springframework.web.reactive.function.client.WebClient;
 import org.testcontainers.containers.GenericContainer;
@@ -26,7 +28,7 @@ class WebFluxSseMcpAsyncClientTests extends AbstractMcpAsyncClientTests {
 
 	// Uses the https://github.com/tzolov/mcp-everything-server-docker-image
 	@SuppressWarnings("resource")
-	GenericContainer<?> container = new GenericContainer<>("docker.io/tzolov/mcp-everything-server:v2")
+	static GenericContainer<?> container = new GenericContainer<>("docker.io/tzolov/mcp-everything-server:v2")
 		.withCommand("node dist/index.js sse")
 		.withLogConsumer(outputFrame -> System.out.println(outputFrame.getUtf8String()))
 		.withExposedPorts(3001)
@@ -37,15 +39,15 @@ class WebFluxSseMcpAsyncClientTests extends AbstractMcpAsyncClientTests {
 		return WebFluxSseClientTransport.builder(WebClient.builder().baseUrl(host)).build();
 	}
 
-	@Override
-	protected void onStart() {
+	@BeforeAll
+	static void startContainer() {
 		container.start();
 		int port = container.getMappedPort(3001);
 		host = "http://" + container.getHost() + ":" + port;
 	}
 
-	@Override
-	public void onClose() {
+	@AfterAll
+	static void stopContainer() {
 		container.stop();
 	}
 

mcp-spring/mcp-spring-webflux/src/test/java/io/modelcontextprotocol/client/WebFluxSseMcpSyncClientTests.java

@@ -8,6 +8,8 @@ import java.time.Duration;
 
 import io.modelcontextprotocol.client.transport.WebFluxSseClientTransport;
 import io.modelcontextprotocol.spec.McpClientTransport;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Timeout;
 import org.testcontainers.containers.GenericContainer;
 import org.testcontainers.containers.wait.strategy.Wait;
@@ -26,7 +28,7 @@ class WebFluxSseMcpSyncClientTests extends AbstractMcpSyncClientTests {
 
 	// Uses the https://github.com/tzolov/mcp-everything-server-docker-image
 	@SuppressWarnings("resource")
-	GenericContainer<?> container = new GenericContainer<>("docker.io/tzolov/mcp-everything-server:v2")
+	static GenericContainer<?> container = new GenericContainer<>("docker.io/tzolov/mcp-everything-server:v2")
 		.withCommand("node dist/index.js sse")
 		.withLogConsumer(outputFrame -> System.out.println(outputFrame.getUtf8String()))
 		.withExposedPorts(3001)
@@ -37,15 +39,15 @@ class WebFluxSseMcpSyncClientTests extends AbstractMcpSyncClientTests {
 		return WebFluxSseClientTransport.builder(WebClient.builder().baseUrl(host)).build();
 	}
 
-	@Override
-	protected void onStart() {
+	@BeforeAll
+	static void startContainer() {
 		container.start();
 		int port = container.getMappedPort(3001);
 		host = "http://" + container.getHost() + ":" + port;
 	}
 
-	@Override
-	protected void onClose() {
+	@AfterAll
+	static void stopContainer() {
 		container.stop();
 	}
 

mcp-spring/mcp-spring-webflux/src/test/java/io/modelcontextprotocol/client/transport/WebFluxSseClientTransportTests.java

@@ -13,7 +13,9 @@ import java.util.function.Function;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import io.modelcontextprotocol.spec.McpSchema;
 import io.modelcontextprotocol.spec.McpSchema.JSONRPCRequest;
+import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.Timeout;
@@ -42,7 +44,7 @@ class WebFluxSseClientTransportTests {
 	static String host = "http://localhost:3001";
 
 	@SuppressWarnings("resource")
-	GenericContainer<?> container = new GenericContainer<>("docker.io/tzolov/mcp-everything-server:v2")
+	static GenericContainer<?> container = new GenericContainer<>("docker.io/tzolov/mcp-everything-server:v2")
 		.withCommand("node dist/index.js sse")
 		.withLogConsumer(outputFrame -> System.out.println(outputFrame.getUtf8String()))
 		.withExposedPorts(3001)
@@ -95,15 +97,20 @@ class WebFluxSseClientTransportTests {
 
 	}
 
-	void startContainer() {
+	@BeforeAll
+	static void startContainer() {
 		container.start();
 		int port = container.getMappedPort(3001);
 		host = "http://" + container.getHost() + ":" + port;
 	}
 
+	@AfterAll
+	static void cleanup() {
+		container.stop();
+	}
+
 	@BeforeEach
 	void setUp() {
-		startContainer();
 		webClientBuilder = WebClient.builder().baseUrl(host);
 		objectMapper = new ObjectMapper();
 		transport = new TestSseClientTransport(webClientBuilder, objectMapper);
@@ -115,11 +122,6 @@ class WebFluxSseClientTransportTests {
 		if (transport != null) {
 			assertThatCode(() -> transport.closeGracefully().block(Duration.ofSeconds(10))).doesNotThrowAnyException();
 		}
-		cleanup();
-	}
-
-	void cleanup() {
-		container.stop();
 	}
 
 	@Test