From bdcbc829a017aca4399cfc6cd2faf53e26b4ec28 Mon Sep 17 00:00:00 2001
From: Peter Steinberger <steipete@gmail.com>
Date: Wed, 24 Dec 2025 17:41:55 +0100
Subject: [PATCH] test: add coverage flush helper

---
 .../ClawdisIPCTests/CoverageDumpTests.swift    | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 apps/macos/Tests/ClawdisIPCTests/CoverageDumpTests.swift

diff --git a/apps/macos/Tests/ClawdisIPCTests/CoverageDumpTests.swift b/apps/macos/Tests/ClawdisIPCTests/CoverageDumpTests.swift
new file mode 100644
index 000000000..917a786d3
--- /dev/null
+++ b/apps/macos/Tests/ClawdisIPCTests/CoverageDumpTests.swift
@@ -0,0 +1,18 @@
+import Darwin
+import Foundation
+import Testing
+
+@Suite(.serialized)
+struct CoverageDumpTests {
+    @Test func periodicallyFlushCoverage() async {
+        guard ProcessInfo.processInfo.environment["LLVM_PROFILE_FILE"] != nil else { return }
+        let deadline = Date().addingTimeInterval(4)
+        while Date() < deadline {
+            _ = llvmProfileWriteFile()
+            try? await Task.sleep(nanoseconds: 250_000_000)
+        }
+    }
+}
+
+@_silgen_name("__llvm_profile_write_file")
+private func llvmProfileWriteFile() -> Int32