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Fix flaky test running blocking code in event loop #155

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Fix flaky test running blocking code in event loop #155

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38 changes: 19 additions & 19 deletions .../mcp-spring-webflux/src/test/java/io/modelcontextprotocol/WebFluxSseIntegrationTests.java
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Original file line number Diff line number Diff line change
Expand Up @@ -35,10 +35,8 @@
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
import reactor.core.publisher.Mono;
import reactor.netty.DisposableServer;
import reactor.netty.http.server.HttpServer;
import reactor.test.StepVerifier;

import org.springframework.http.server.reactive.HttpHandler;
import org.springframework.http.server.reactive.ReactorHttpHandlerAdapter;
Expand All @@ -47,6 +45,7 @@
import org.springframework.web.reactive.function.server.RouterFunctions;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertWith;
import static org.awaitility.Awaitility.await;
import static org.mockito.Mockito.mock;

Expand Down Expand Up @@ -106,12 +105,9 @@ void testCreateMessageWithoutSamplingCapabilities(String clientType) {
var clientBuilder = clientBuilders.get(clientType);

McpServerFeatures.AsyncToolSpecification tool = new McpServerFeatures.AsyncToolSpecification(
new McpSchema.Tool("tool1", "tool1 description", emptyJsonSchema), (exchange, request) -> {

exchange.createMessage(mock(McpSchema.CreateMessageRequest.class)).block();

return Mono.just(mock(CallToolResult.class));
});
new McpSchema.Tool("tool1", "tool1 description", emptyJsonSchema),
(exchange, request) -> exchange.createMessage(mock(CreateMessageRequest.class))
.thenReturn(mock(CallToolResult.class)));

var server = McpServer.async(mcpServerTransportProvider).serverInfo("test-server", "1.0.0").tools(tool).build();

Expand Down Expand Up @@ -148,6 +144,8 @@ void testCreateMessageSuccess(String clientType) throws InterruptedException {
CallToolResult callResponse = new McpSchema.CallToolResult(List.of(new McpSchema.TextContent("CALL RESPONSE")),
null);

AtomicReference<CreateMessageResult> samplingResult = new AtomicReference<>();

McpServerFeatures.AsyncToolSpecification tool = new McpServerFeatures.AsyncToolSpecification(
new McpSchema.Tool("tool1", "tool1 description", emptyJsonSchema), (exchange, request) -> {

Expand All @@ -162,16 +160,9 @@ void testCreateMessageSuccess(String clientType) throws InterruptedException {
.build())
.build();

StepVerifier.create(exchange.createMessage(craeteMessageRequest)).consumeNextWith(result -> {
assertThat(result).isNotNull();
assertThat(result.role()).isEqualTo(Role.USER);
assertThat(result.content()).isInstanceOf(McpSchema.TextContent.class);
assertThat(((McpSchema.TextContent) result.content()).text()).isEqualTo("Test message");
assertThat(result.model()).isEqualTo("MockModelName");
assertThat(result.stopReason()).isEqualTo(CreateMessageResult.StopReason.STOP_SEQUENCE);
}).verifyComplete();

return Mono.just(callResponse);
return exchange.createMessage(craeteMessageRequest)
.doOnNext(samplingResult::set)
.thenReturn(callResponse);
});

var mcpServer = McpServer.async(mcpServerTransportProvider)
Expand All @@ -191,8 +182,17 @@ void testCreateMessageSuccess(String clientType) throws InterruptedException {

assertThat(response).isNotNull();
assertThat(response).isEqualTo(callResponse);

assertWith(samplingResult.get(), result -> {
assertThat(result).isNotNull();
assertThat(result.role()).isEqualTo(Role.USER);
assertThat(result.content()).isInstanceOf(McpSchema.TextContent.class);
assertThat(((McpSchema.TextContent) result.content()).text()).isEqualTo("Test message");
assertThat(result.model()).isEqualTo("MockModelName");
assertThat(result.stopReason()).isEqualTo(CreateMessageResult.StopReason.STOP_SEQUENCE);
});
}
mcpServer.close();
mcpServer.closeGracefully().block();
}

// ---------------------------------------
Expand Down