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-rw-r--r--tools/profiler/tests/xpcshell/test_responsiveness.js53
1 files changed, 53 insertions, 0 deletions
diff --git a/tools/profiler/tests/xpcshell/test_responsiveness.js b/tools/profiler/tests/xpcshell/test_responsiveness.js
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+++ b/tools/profiler/tests/xpcshell/test_responsiveness.js
@@ -0,0 +1,53 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * Test that we can measure non-zero event delays
+ */
+
+add_task(async () => {
+ if (!AppConstants.MOZ_GECKO_PROFILER) {
+ return;
+ }
+ const entries = 10000;
+ const interval = 1;
+ const threads = [];
+ const features = [];
+
+ Services.profiler.StartProfiler(entries, interval, features, threads);
+
+ await functionA();
+
+ const profile = await Services.profiler.getProfileDataAsync();
+ const [thread] = profile.threads;
+ const { samples } = thread;
+ const message = "eventDelay > 0 not found.";
+ let SAMPLE_STACK_SLOT = thread.samples.schema.eventDelay;
+
+ for (let i = 0; i < samples.data.length; i++) {
+ if (samples.data[i][SAMPLE_STACK_SLOT] > 0) {
+ Assert.ok(true, message);
+ return;
+ }
+ }
+ Assert.ok(false, message);
+});
+
+function doSyncWork(milliseconds) {
+ const start = Date.now();
+ while (true) {
+ this.n = 0;
+ for (let i = 0; i < 1e5; i++) {
+ this.n += Math.random();
+ }
+ if (Date.now() - start > milliseconds) {
+ return;
+ }
+ }
+}
+
+function functionA() {
+ doSyncWork(100);
+ captureAtLeastOneJsSample();
+}