From e02a3611b06ea025899fecaf02ad4e6244a997f3 Mon Sep 17 00:00:00 2001
From: Peter Steinberger <steipete@gmail.com>
Date: Thu, 17 Sep 2026 13:04:21 -0700
Subject: [PATCH] test(process): define synthetic child stdio state (#151096)

---
 test/scripts/managed-child-process.termination.test.ts | 2 ++
 test/scripts/managed-child-process.tree.test.ts        | 7 ++++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/test/scripts/managed-child-process.termination.test.ts b/test/scripts/managed-child-process.termination.test.ts
index 36ad02f0343c..f69f7184cee6 100644
--- a/test/scripts/managed-child-process.termination.test.ts
+++ b/test/scripts/managed-child-process.termination.test.ts
@@ -18,6 +18,8 @@ function createChild() {
   Object.defineProperties(child, {
     pid: { value: 12345 },
     exitCode: { get: () => exitCode },
+    stdout: { value: null, writable: true },
+    stderr: { value: null, writable: true },
   });
   return {
     child,
diff --git a/test/scripts/managed-child-process.tree.test.ts b/test/scripts/managed-child-process.tree.test.ts
index 6a12f1fb3ac4..e21ffad3eb20 100644
--- a/test/scripts/managed-child-process.tree.test.ts
+++ b/test/scripts/managed-child-process.tree.test.ts
@@ -46,7 +46,12 @@ it("cancels admission while Windows platform code loads without spawning or reta
 it("preserves requested command inputs across Windows platform loading", async () => {
   const root = dirs.make("managed-platform-inputs-");
   const child = new ChildProcess();
-  Object.defineProperties(child, { pid: { value: 12345 }, exitCode: { value: 0 } });
+  Object.defineProperties(child, {
+    pid: { value: 12345 },
+    exitCode: { value: 0 },
+    stdout: { value: null, writable: true },
+    stderr: { value: null, writable: true },
+  });
   let launched: { argument?: string; value?: string } | undefined;
   mocks.spawnWindowsJobChild.mockImplementation((_command, args, options) => {
     launched = { argument: args[0], value: options.env.VALUE };