1 files changed, 42 insertions, 0 deletions
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_reload.js b/devtools/client/styleeditor/test/browser_styleeditor_reload.js
new file mode 100644
index 0000000000..f568b3f40f
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_reload.js
@@ -0,0 +1,42 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that selected sheet and cursor position persists during reload.
+
+const TESTCASE_URI = TEST_BASE_HTTPS + "simple.html";
+
+const LINE_NO = 5;
+const COL_NO = 3;
+
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  is(ui.editors.length, 2, "Two sheets present after load.");
+
+  info("Selecting the second editor");
+  await ui.selectStyleSheet(ui.editors[1].styleSheet, LINE_NO, COL_NO);
+  const selectedStyleSheetIndex = ui.editors[1].styleSheet.styleSheetIndex;
+
+  await reloadPageAndWaitForStyleSheets(ui, 2);
+
+  info("Waiting for source editor to be ready.");
+  const newEditor = findEditor(ui, selectedStyleSheetIndex);
+  await newEditor.getSourceEditor();
+
+  is(
+    ui.selectedEditor,
+    newEditor,
+    "Editor of stylesheet that has styleSheetIndex we selected is selected after reload"
+  );
+
+  const { line, ch } = ui.selectedEditor.sourceEditor.getCursor();
+  is(line, LINE_NO, "correct line selected");
+  is(ch, COL_NO, "correct column selected");
+});
+
+function findEditor(ui, styleSheetIndex) {
+  return ui.editors.find(
+    editor => editor.styleSheet.styleSheetIndex === styleSheetIndex
+  );
+}