1 files changed, 24 insertions, 0 deletions
diff --git a/devtools/client/inspector/flexbox/test/browser_flexbox_empty_state.js b/devtools/client/inspector/flexbox/test/browser_flexbox_empty_state.js
new file mode 100644
index 0000000000..82e523ebe0
--- /dev/null
+++ b/devtools/client/inspector/flexbox/test/browser_flexbox_empty_state.js
@@ -0,0 +1,24 @@
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test that a message is displayed when no flex container is selected.
+
+const TEST_URI = `
+  <div></div>
+`;
+
+add_task(async function () {
+  await addTab("data:text/html;charset=utf-8," + encodeURIComponent(TEST_URI));
+  const { flexboxInspector } = await openLayoutView();
+  const { document: doc } = flexboxInspector;
+
+  info("Checking the initial state of the Flexbox Inspector.");
+  ok(
+    doc.querySelector(
+      ".flex-accordion .devtools-sidepanel-no-result",
+      "A message is shown when no flex container is selected."
+    )
+  );
+});