1 files changed, 53 insertions, 0 deletions
diff --git a/devtools/client/performance/test/browser_perf-details-render-00-waterfall.js b/devtools/client/performance/test/browser_perf-details-render-00-waterfall.js
new file mode 100644
index 0000000000..8b73e8c06f
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+++ b/devtools/client/performance/test/browser_perf-details-render-00-waterfall.js
@@ -0,0 +1,53 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+/**
+ * Tests that the waterfall view renders content after recording.
+ */
+
+const { SIMPLE_URL } = require("devtools/client/performance/test/helpers/urls");
+const {
+  initPerformanceInNewTab,
+  teardownToolboxAndRemoveTab,
+} = require("devtools/client/performance/test/helpers/panel-utils");
+const {
+  startRecording,
+  stopRecording,
+} = require("devtools/client/performance/test/helpers/actions");
+
+add_task(async function() {
+  const { panel } = await initPerformanceInNewTab({
+    url: SIMPLE_URL,
+    win: window,
+  });
+
+  const { DetailsView, WaterfallView } = panel.panelWin;
+
+  await startRecording(panel);
+  // Already waits for EVENTS.UI_WATERFALL_RENDERED.
+  await stopRecording(panel);
+
+  ok(
+    DetailsView.isViewSelected(WaterfallView),
+    "The waterfall view is selected by default in the details view."
+  );
+
+  ok(true, "WaterfallView rendered after recording is stopped.");
+
+  await startRecording(panel);
+  // Already waits for EVENTS.UI_WATERFALL_RENDERED.
+  await stopRecording(panel);
+
+  ok(
+    DetailsView.isViewSelected(WaterfallView),
+    "The waterfall view is still selected in the details view."
+  );
+
+  ok(
+    true,
+    "WaterfallView rendered again after recording completed a second time."
+  );
+
+  await teardownToolboxAndRemoveTab(panel);
+});