1 files changed, 31 insertions, 0 deletions
diff --git a/docshell/test/browser/browser_bug1622420.js b/docshell/test/browser/browser_bug1622420.js
new file mode 100644
index 0000000000..81026611e4
--- /dev/null
+++ b/docshell/test/browser/browser_bug1622420.js
@@ -0,0 +1,31 @@
+const ACTOR = "Bug1622420";
+
+add_task(async function test() {
+  let base = getRootDirectory(gTestPath).slice(0, -1);
+  ChromeUtils.registerWindowActor(ACTOR, {
+    allFrames: true,
+    child: {
+      esModuleURI: `${base}/Bug1622420Child.sys.mjs`,
+    },
+  });
+
+  registerCleanupFunction(async () => {
+    gBrowser.removeTab(tab);
+
+    ChromeUtils.unregisterWindowActor(ACTOR);
+  });
+
+  let tab = await BrowserTestUtils.openNewForegroundTab(
+    gBrowser,
+    // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+    "http://example.org/browser/docshell/test/browser/file_bug1622420.html"
+  );
+  let childBC = tab.linkedBrowser.browsingContext.children[0];
+  let success = await childBC.currentWindowGlobal
+    .getActor(ACTOR)
+    .sendQuery("hasWindowContextForTopBC");
+  ok(
+    success,
+    "Should have a WindowContext for the top BrowsingContext in the process of a child BrowsingContext"
+  );
+});