Missing negation

Signed-off-by: Dariusz Jędrzejczyk <2554306+chemicL@users.noreply.github.com>

Author: chemicL

mcp-core/src/main/java/io/modelcontextprotocol/server/McpStatelessAsyncServer.java

@@ -746,7 +746,7 @@ private McpStatelessRequestHandler<McpSchema.CompleteResult> completionCompleteR
 				}
 				List<McpSchema.PromptArgument> arguments = promptSpec.prompt().arguments();
 				if (arguments == null
-						|| arguments.stream().filter(arg -> arg.name().equals(argumentName)).findFirst().isPresent()) {
+						|| !arguments.stream().filter(arg -> arg.name().equals(argumentName)).findFirst().isPresent()) {
 
 					logger.warn("Argument not found: {} in prompt: {}", argumentName, promptReference.name());
 

mcp-test/src/test/java/io/modelcontextprotocol/server/HttpServletStatelessIntegrationTests.java

@@ -184,10 +184,10 @@ void testCompletionShouldReturnExpectedSuggestions(String clientType) {
 				true // hasMore
 		));
 
-		AtomicReference<CompleteRequest> samplingRequest = new AtomicReference<>();
+		AtomicReference<CompleteRequest> completeRequest = new AtomicReference<>();
 		BiFunction<McpTransportContext, CompleteRequest, CompleteResult> completionHandler = (transportContext,
 				request) -> {
-			samplingRequest.set(request);
+			completeRequest.set(request);
 			return completionResponse;
 		};
 
@@ -214,9 +214,9 @@ void testCompletionShouldReturnExpectedSuggestions(String clientType) {
 
 			assertThat(result).isNotNull();
 
-			assertThat(samplingRequest.get().argument().name()).isEqualTo("language");
-			assertThat(samplingRequest.get().argument().value()).isEqualTo("py");
-			assertThat(samplingRequest.get().ref().type()).isEqualTo(PromptReference.TYPE);
+			assertThat(completeRequest.get().argument().name()).isEqualTo("language");
+			assertThat(completeRequest.get().argument().value()).isEqualTo("py");
+			assertThat(completeRequest.get().ref().type()).isEqualTo(PromptReference.TYPE);
 		}
 		finally {
 			mcpServer.close();