From 1da3a93991e102c30ec1394e0e811d9f74e81014 Mon Sep 17 00:00:00 2001
From: Oriol Brufau <oriol-bugzilla@hotmail.com>
Date: Mon, 10 Jan 2022 10:14:55 +0000
Subject: [PATCH] Bug 1749013 - Fix browser_jsonview_save_json.js checking disk
 data too early. r=Honza

Differential Revision: https://phabricator.services.mozilla.com/D135446
---
 devtools/client/jsonview/test/browser_jsonview_save_json.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/devtools/client/jsonview/test/browser_jsonview_save_json.js b/devtools/client/jsonview/test/browser_jsonview_save_json.js
index 8073b5223d5f..10f4a46a98c3 100644
--- a/devtools/client/jsonview/test/browser_jsonview_save_json.js
+++ b/devtools/client/jsonview/test/browser_jsonview_save_json.js
@@ -45,6 +45,10 @@ function awaitSavedFileContents(name, ext) {
             ok(destFile.exists(), "The downloaded file should exist.");
             const { path } = destFile;
             await BrowserTestUtils.waitForCondition(() => IOUtils.exists(path));
+            await BrowserTestUtils.waitForCondition(async () => {
+              const { size } = await IOUtils.stat(path);
+              return size > 0;
+            });
             const buffer = await IOUtils.read(path);
             resolve(new TextDecoder().decode(buffer));
           } catch (error) {