1 files changed, 45 insertions, 0 deletions
diff --git a/devtools/client/performance/test/browser_perf-options-show-idle-blocks-02.js b/devtools/client/performance/test/browser_perf-options-show-idle-blocks-02.js
new file mode 100644
index 000000000..3e0146ac7
--- /dev/null
+++ b/devtools/client/performance/test/browser_perf-options-show-idle-blocks-02.js
@@ -0,0 +1,45 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+/**
+ * Tests that the memory flamegraphs get rerendered when toggling `show-idle-blocks`.
+ */
+
+const { SIMPLE_URL } = require("devtools/client/performance/test/helpers/urls");
+const { UI_ENABLE_ALLOCATIONS_PREF, UI_SHOW_IDLE_BLOCKS_PREF } = require("devtools/client/performance/test/helpers/prefs");
+const { initPerformanceInNewTab, teardownToolboxAndRemoveTab } = require("devtools/client/performance/test/helpers/panel-utils");
+const { startRecording, stopRecording } = require("devtools/client/performance/test/helpers/actions");
+const { once } = require("devtools/client/performance/test/helpers/event-utils");
+
+add_task(function* () {
+  let { panel } = yield initPerformanceInNewTab({
+    url: SIMPLE_URL,
+    win: window
+  });
+
+  let { EVENTS, DetailsView, MemoryFlameGraphView } = panel.panelWin;
+
+  // Enable allocations to test.
+  Services.prefs.setBoolPref(UI_ENABLE_ALLOCATIONS_PREF, true);
+  Services.prefs.setBoolPref(UI_SHOW_IDLE_BLOCKS_PREF, true);
+
+  yield startRecording(panel);
+  yield stopRecording(panel);
+
+  let rendered = once(MemoryFlameGraphView, EVENTS.UI_MEMORY_FLAMEGRAPH_RENDERED);
+  yield DetailsView.selectView("memory-flamegraph");
+  yield rendered;
+
+  rendered = once(MemoryFlameGraphView, EVENTS.UI_MEMORY_FLAMEGRAPH_RENDERED);
+  Services.prefs.setBoolPref(UI_SHOW_IDLE_BLOCKS_PREF, false);
+  yield rendered;
+  ok(true, "MemoryFlameGraphView rerendered when toggling show-idle-blocks.");
+
+  rendered = once(MemoryFlameGraphView, EVENTS.UI_MEMORY_FLAMEGRAPH_RENDERED);
+  Services.prefs.setBoolPref(UI_SHOW_IDLE_BLOCKS_PREF, true);
+  yield rendered;
+  ok(true, "MemoryFlameGraphView rerendered when toggling back show-idle-blocks.");
+
+  yield teardownToolboxAndRemoveTab(panel);
+});