fix another flaky test

Signed-off-by: tvallin <thibault.vallin@oracle.com>

webserver/tests/webserver/src/test/java/io/helidon/webserver/tests/WebServerStopIdleTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023 Oracle and/or its affiliates.
+ * Copyright (c) 2023, 2024 Oracle and/or its affiliates.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,6 +21,9 @@
 import io.helidon.webserver.WebServer;
 
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.condition.DisabledOnOs;
+import org.junit.jupiter.api.condition.EnabledOnOs;
+import org.junit.jupiter.api.condition.OS;
 
 import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.MatcherAssert.assertThat;
@@ -29,7 +32,20 @@
 class WebServerStopIdleTest {
 
     @Test
+    @DisabledOnOs(OS.WINDOWS)
     void stopWhenIdleExpectTimelyStop() {
+        stopWhenIdleExpectTimelyStop(500);
+    }
+
+    @Test
+    @EnabledOnOs(
+            value = OS.WINDOWS,
+            disabledReason = "Slow pipeline runner make it stop a few millisecond later")
+    void stopWhenIdleExpectTimelyStopWindows() {
+        stopWhenIdleExpectTimelyStop(505);
+    }
+
+    void stopWhenIdleExpectTimelyStop(int maximumTime) {
         WebServer webServer = WebServer.builder()
                 .routing(router -> router.get("ok", (req, res) -> res.send("ok")))
                 .build();
@@ -46,6 +62,6 @@ void stopWhenIdleExpectTimelyStop() {
         long startMillis = System.currentTimeMillis();
         webServer.stop();
         int stopExecutionTimeInMillis = (int) (System.currentTimeMillis() - startMillis);
-        assertThat(stopExecutionTimeInMillis, is(lessThan(500)));
+        assertThat(stopExecutionTimeInMillis, is(lessThan(maximumTime)));
     }
 }