From 36a5009994b73f1a0ea5faedf3751459a7eed41e Mon Sep 17 00:00:00 2001
From: Samuel Attard <sam@electronjs.org>
Date: Thu, 12 May 2022 00:41:58 -0700
Subject: [PATCH] test: fix background transparency flake (#34190)

---
 spec-main/api-browser-window-spec.ts                        | 6 ++++--
 .../fixtures/apps/background-color-transparent/main.js      | 2 ++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/spec-main/api-browser-window-spec.ts b/spec-main/api-browser-window-spec.ts
index 6d76851d82b2e..b938b483b8c5e 100644
--- a/spec-main/api-browser-window-spec.ts
+++ b/spec-main/api-browser-window-spec.ts
@@ -1828,7 +1828,7 @@ describe('BrowserWindow module', () => {
   });
 
   ifdescribe(process.platform === 'darwin')('BrowserWindow.setVibrancy(type)', () => {
-    let appProcess: childProcess.ChildProcessWithoutNullStreams | undefined;
+    let appProcess: childProcess.ChildProcessWithoutNullStreams | childProcess.ChildProcess | undefined;
 
     afterEach(() => {
       if (appProcess && !appProcess.killed) {
@@ -1859,7 +1859,9 @@ describe('BrowserWindow module', () => {
     it('Allows setting a transparent window via CSS', async () => {
       const appPath = path.join(__dirname, 'fixtures', 'apps', 'background-color-transparent');
 
-      appProcess = childProcess.spawn(process.execPath, [appPath]);
+      appProcess = childProcess.spawn(process.execPath, [appPath], {
+        stdio: 'inherit'
+      });
 
       const [code] = await emittedOnce(appProcess, 'exit');
       expect(code).to.equal(0);
diff --git a/spec-main/fixtures/apps/background-color-transparent/main.js b/spec-main/fixtures/apps/background-color-transparent/main.js
index 8d1da05c6c1db..3086db0dc6b97 100644
--- a/spec-main/fixtures/apps/background-color-transparent/main.js
+++ b/spec-main/fixtures/apps/background-color-transparent/main.js
@@ -21,6 +21,7 @@ async function createWindow () {
     transparent: true,
     vibrancy: 'under-window',
     webPreferences: {
+      backgroundThrottling: false,
       contextIsolation: false,
       nodeIntegration: true
     }
@@ -43,6 +44,7 @@ ipcMain.on('set-transparent', async () => {
   colors.transparent = result[0].hex();
 
   const { green, transparent } = colors;
+  console.log({ green, transparent });
   process.exit(green === transparent ? 1 : 0);
 });