1 files changed, 31 insertions, 0 deletions
diff --git a/devtools/server/tests/browser/browser_layout_simple.js b/devtools/server/tests/browser/browser_layout_simple.js
new file mode 100644
index 0000000000..4e773c5966
--- /dev/null
+++ b/devtools/server/tests/browser/browser_layout_simple.js
@@ -0,0 +1,31 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Simple checks for the LayoutActor and GridActor
+
+add_task(async function() {
+  const { target, walker, layout } = await initLayoutFrontForUrl(
+    "data:text/html;charset=utf-8,<title>test</title><div></div>"
+  );
+
+  ok(layout, "The LayoutFront was created");
+  ok(layout.getGrids, "The getGrids method exists");
+
+  let didThrow = false;
+  try {
+    await layout.getGrids(null);
+  } catch (e) {
+    didThrow = true;
+  }
+  ok(didThrow, "An exception was thrown for a missing NodeActor in getGrids");
+
+  const invalidNode = await walker.querySelector(walker.rootNode, "title");
+  const grids = await layout.getGrids(invalidNode);
+  ok(Array.isArray(grids), "An array of grids was returned");
+  is(grids.length, 0, "0 grids have been returned for the invalid node");
+
+  await target.destroy();
+  gBrowser.removeCurrentTab();
+});