1 files changed, 54 insertions, 0 deletions
diff --git a/devtools/client/webconsole/test/browser/browser_console_many_toggles.js b/devtools/client/webconsole/test/browser/browser_console_many_toggles.js
new file mode 100644
index 0000000000..21bbde1d14
--- /dev/null
+++ b/devtools/client/webconsole/test/browser/browser_console_many_toggles.js
@@ -0,0 +1,54 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Test that we safely close and reopen the Browser Console.
+
+"use strict";
+
+add_task(async function () {
+  // Enable the multiprocess mode as it is more likely to break on startup
+  await pushPref("devtools.browsertoolbox.scope", "everything");
+
+  const promises = [];
+  for (let i = 0; i < 5; i++) {
+    info("Open the Browser Console");
+    promises.push(BrowserConsoleManager.toggleBrowserConsole());
+
+    // Use different pause time between opening and closing
+    await wait(i * 100);
+
+    info("Close the Browser Console");
+    promises.push(BrowserConsoleManager.closeBrowserConsole());
+
+    // Use different pause time between opening and closing
+    await wait(i * 100);
+  }
+
+  info("Wait for all opening/closing promises");
+  // Ignore any exception here, we expect some as we are racing opening versus destruction
+  await Promise.allSettled(promises);
+
+  // The browser console may end up being opened or closed because of usage of "toggle"
+  // Ensure having a console opened to verify it works
+  let hud = BrowserConsoleManager.getBrowserConsole();
+  if (!hud) {
+    info("Reopen the browser console a last time");
+    hud = await BrowserConsoleManager.toggleBrowserConsole();
+  }
+
+  info("Log a message and ensure it is visible and the console mostly works");
+  console.log("message from mochitest");
+  await checkUniqueMessageExists(hud, "message from mochitest", ".console-api");
+
+  // Clear the messages in order to be able to run this test more than once
+  // and clear the message we just logged
+  await clearOutput(hud);
+
+  info("Ensure closing the Browser Console at the end of the test");
+  await BrowserConsoleManager.closeBrowserConsole();
+
+  ok(
+    !BrowserConsoleManager.getBrowserConsole(),
+    "No browser console opened at the end of test"
+  );
+});