Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 29 insertions, 0 deletions

diff --git a/devtools/server/tests/browser/browser_stylesheets_nested-iframes.js b/devtools/server/tests/browser/browser_stylesheets_nested-iframes.js
new file mode 100644
index 0000000000..bf8838cfec
--- /dev/null
+++ b/devtools/server/tests/browser/browser_stylesheets_nested-iframes.js
@@ -0,0 +1,29 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test that StyleSheetsActor.getStyleSheets() works if an iframe does not have
+// a content document.
+
+add_task(async function() {
+  info("Initialising the devtools server and client.");
+  const target = await addTabTarget(
+    MAIN_DOMAIN + "stylesheets-nested-iframes.html"
+  );
+
+  const front = await target.getFront("stylesheets");
+  ok(front, "The StyleSheetsFront was created.");
+
+  const sheets = await front.getStyleSheets();
+  ok(sheets, "getStyleSheets() succeeded even with documentless iframes.");
+
+  // Bug 285395 limits the number of nested iframes to 10. There's one sheet per
+  // frame so we should get 10 sheets. However, the limit might change in the
+  // future so it's better not to rely on the limit. Asserting > 2 ensures that
+  // the test page is actually loading nested iframes and this test is doing
+  // something sensible (if we got this far, the test has served its purpose).
+  ok(sheets.length > 2, sheets.length + " sheets found (expected 3 or more).");
+
+  await target.destroy();
+});