1 files changed, 33 insertions, 0 deletions
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_sourcemap_large.js b/devtools/client/styleeditor/test/browser_styleeditor_sourcemap_large.js
new file mode 100644
index 000000000..cddba6877
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_sourcemap_large.js
@@ -0,0 +1,33 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Covers the case from Bug 1128747, where loading a sourcemapped
+// file prevents the correct editor from being selected on load,
+// and causes a second iframe to be appended when the user clicks
+// editor in the list.
+
+const TESTCASE_URI = TEST_BASE_HTTPS + "sourcemaps-large.html";
+
+add_task(function* () {
+  let { ui } = yield openStyleEditorForURL(TESTCASE_URI);
+
+  yield openEditor(ui.editors[0]);
+  let iframes = ui.selectedEditor.details.querySelectorAll("iframe");
+
+  is(iframes.length, 1, "There is only one editor iframe");
+  ok(ui.selectedEditor.summary.classList.contains("splitview-active"),
+    "The editor is selected");
+});
+
+function openEditor(editor) {
+  getLinkFor(editor).click();
+
+  return editor.getSourceEditor();
+}
+
+function getLinkFor(editor) {
+  return editor.summary.querySelector(".stylesheet-name");
+}