From 4b909869664060a95b396834314aa0d7488db5ea Mon Sep 17 00:00:00 2001
From: Peter Lawrey <peter.lawrey@chronicle.software>
Date: Fri, 23 May 2025 09:08:14 +0100
Subject: [PATCH] Add test for negative PID

---
 .../src/test/java/net/openhft/affinity/LockCheckTest.java    | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/affinity/src/test/java/net/openhft/affinity/LockCheckTest.java b/affinity/src/test/java/net/openhft/affinity/LockCheckTest.java
index 40f5d18e5..2612886ce 100644
--- a/affinity/src/test/java/net/openhft/affinity/LockCheckTest.java
+++ b/affinity/src/test/java/net/openhft/affinity/LockCheckTest.java
@@ -55,6 +55,11 @@ public void testPidOnLinux() {
         Assert.assertTrue(LockCheck.isProcessRunning(LockCheck.getPID()));
     }
 
+    @Test
+    public void testNegativePidOnLinux() {
+        Assert.assertFalse(LockCheck.isProcessRunning(-1));
+    }
+
     @Test
     public void testReplace() throws IOException {
         cpu++;