1 files changed, 69 insertions, 0 deletions
diff --git a/devtools/client/performance/test/browser_perf-options-enable-memory-02.js b/devtools/client/performance/test/browser_perf-options-enable-memory-02.js
new file mode 100644
index 0000000000..b71fef4ed9
--- /dev/null
+++ b/devtools/client/performance/test/browser_perf-options-enable-memory-02.js
@@ -0,0 +1,69 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+/**
+ * Tests that toggling `enable-memory` during a recording doesn't change that
+ * recording's state and does not break.
+ */
+
+const { SIMPLE_URL } = require("devtools/client/performance/test/helpers/urls");
+const {
+  UI_ENABLE_MEMORY_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");
+
+add_task(async function() {
+  const { panel } = await initPerformanceInNewTab({
+    url: SIMPLE_URL,
+    win: window,
+  });
+
+  const { PerformanceController } = panel.panelWin;
+
+  // Test starting without memory, and stopping with it.
+  Services.prefs.setBoolPref(UI_ENABLE_MEMORY_PREF, false);
+  await startRecording(panel);
+
+  Services.prefs.setBoolPref(UI_ENABLE_MEMORY_PREF, true);
+  await stopRecording(panel);
+
+  is(
+    PerformanceController.getCurrentRecording().getConfiguration().withMemory,
+    false,
+    "The recording finished without tracking memory."
+  );
+  is(
+    PerformanceController.getCurrentRecording().getConfiguration()
+      .withAllocations,
+    false,
+    "The recording finished without tracking allocations."
+  );
+
+  // Test starting with memory, and stopping without it.
+  await startRecording(panel);
+
+  Services.prefs.setBoolPref(UI_ENABLE_MEMORY_PREF, false);
+  await stopRecording(panel);
+
+  is(
+    PerformanceController.getCurrentRecording().getConfiguration().withMemory,
+    true,
+    "The recording finished with tracking memory."
+  );
+  is(
+    PerformanceController.getCurrentRecording().getConfiguration()
+      .withAllocations,
+    false,
+    "The recording still is not recording allocations."
+  );
+
+  await teardownToolboxAndRemoveTab(panel);
+});