1 files changed, 71 insertions, 0 deletions
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_media_sidebar_sourcemaps.js b/devtools/client/styleeditor/test/browser_styleeditor_media_sidebar_sourcemaps.js
new file mode 100644
index 000000000..9214d93fd
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_media_sidebar_sourcemaps.js
@@ -0,0 +1,71 @@
+/* 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";
+
+// https rather than chrome to improve coverage
+const TESTCASE_URI = TEST_BASE_HTTPS + "media-rules-sourcemaps.html";
+const MAP_PREF = "devtools.styleeditor.source-maps-enabled";
+
+const LABELS = ["screen and (max-width: 320px)",
+                "screen and (min-width: 1200px)"];
+const LINE_NOS = [5, 8];
+
+waitForExplicitFinish();
+
+add_task(function* () {
+  Services.prefs.setBoolPref(MAP_PREF, true);
+
+  let { ui } = yield openStyleEditorForURL(TESTCASE_URI);
+
+  yield listenForMediaChange(ui);
+
+  is(ui.editors.length, 1, "correct number of editors");
+
+  // Test editor with @media rules
+  let mediaEditor = ui.editors[0];
+  yield openEditor(mediaEditor);
+  testMediaEditor(mediaEditor);
+
+  Services.prefs.clearUserPref(MAP_PREF);
+});
+
+function testMediaEditor(editor) {
+  let sidebar = editor.details.querySelector(".stylesheet-sidebar");
+  is(sidebar.hidden, false, "sidebar is showing on editor with @media");
+
+  let entries = [...sidebar.querySelectorAll(".media-rule-label")];
+  is(entries.length, 2, "two @media rules displayed in sidebar");
+
+  testRule(entries[0], LABELS[0], LINE_NOS[0]);
+  testRule(entries[1], LABELS[1], LINE_NOS[1]);
+}
+
+function testRule(rule, text, lineno) {
+  let cond = rule.querySelector(".media-rule-condition");
+  is(cond.textContent, text, "media label is correct for " + text);
+
+  let line = rule.querySelector(".media-rule-line");
+  is(line.textContent, ":" + lineno, "correct line number shown");
+}
+
+/* Helpers */
+
+function openEditor(editor) {
+  getLinkFor(editor).click();
+
+  return editor.getSourceEditor();
+}
+
+function listenForMediaChange(UI) {
+  let deferred = defer();
+  UI.once("media-list-changed", () => {
+    deferred.resolve();
+  });
+  return deferred.promise;
+}
+
+function getLinkFor(editor) {
+  return editor.summary.querySelector(".stylesheet-name");
+}