1 files changed, 46 insertions, 0 deletions
diff --git a/devtools/client/webconsole/test/browser/browser_jsterm_editor_gutter.js b/devtools/client/webconsole/test/browser/browser_jsterm_editor_gutter.js
new file mode 100644
index 0000000000..e233cb4cbc
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+++ b/devtools/client/webconsole/test/browser/browser_jsterm_editor_gutter.js
@@ -0,0 +1,46 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Test that CodeMirror's gutter in console input is displayed when
+// 'devtools.webconsole.input.editor' is true.
+// See https://bugzilla.mozilla.org/show_bug.cgi?id=1519315
+
+"use strict";
+
+const TEST_URI =
+  "data:text/html;charset=utf-8,<!DOCTYPE html>Test JsTerm editor line gutters";
+
+add_task(async function () {
+  await pushPref("devtools.webconsole.input.editor", true);
+
+  const hud = await openNewTabAndConsole(TEST_URI);
+
+  info("Check that the line numbers gutter is rendered when in editor layout");
+  ok(
+    getLineNumbersGutterElement(hud),
+    "line numbers gutter is rendered on the input when in editor mode."
+  );
+
+  info(
+    "Check that the line numbers gutter is hidden we switch to the inline layout"
+  );
+  await toggleLayout(hud);
+  ok(
+    !getLineNumbersGutterElement(hud),
+    "line numbers gutter is hidden on the input when in inline mode."
+  );
+
+  info(
+    "Check that the line numbers gutter is rendered again we switch back to editor"
+  );
+  await toggleLayout(hud);
+  ok(
+    getLineNumbersGutterElement(hud),
+    "line numbers gutter is rendered again on the " +
+      " input when switching back to editor mode."
+  );
+});
+
+function getLineNumbersGutterElement(hud) {
+  return hud.ui.outputNode.querySelector(".CodeMirror-linenumbers");
+}