1 files changed, 36 insertions, 0 deletions
diff --git a/devtools/client/netmonitor/test/browser_net_waterfall-click.js b/devtools/client/netmonitor/test/browser_net_waterfall-click.js
new file mode 100644
index 0000000000..a54b3b8eee
--- /dev/null
+++ b/devtools/client/netmonitor/test/browser_net_waterfall-click.js
@@ -0,0 +1,36 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * Test that clicking on the waterfall opens the timing sidebar panel.
+ */
+
+add_task(async function () {
+  const { tab, monitor } = await initNetMonitor(
+    CONTENT_TYPE_WITHOUT_CACHE_URL,
+    { requestCount: 1 }
+  );
+  const { document } = monitor.panelWin;
+
+  // Execute requests.
+  await performRequests(monitor, tab, CONTENT_TYPE_WITHOUT_CACHE_REQUESTS);
+
+  info("Clicking waterfall and waiting for panel update.");
+  const wait = waitForDOM(document, "#timings-panel");
+
+  EventUtils.sendMouseEvent(
+    { type: "mousedown" },
+    document.querySelectorAll(".requests-list-timings")[0]
+  );
+
+  await wait;
+
+  ok(
+    document.querySelector("#timings-tab[aria-selected=true]"),
+    "Timings tab is selected."
+  );
+
+  return teardown(monitor);
+});