1 files changed, 54 insertions, 0 deletions
diff --git a/devtools/server/tests/browser/browser_perf-recording-actor-02.js b/devtools/server/tests/browser/browser_perf-recording-actor-02.js
new file mode 100644
index 000000000..8337ad2ef
--- /dev/null
+++ b/devtools/server/tests/browser/browser_perf-recording-actor-02.js
@@ -0,0 +1,54 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Test that buffer status is correctly updated in recording models.
+ */
+
+var BUFFER_SIZE = 20000;
+var config = { bufferSize: BUFFER_SIZE };
+
+const { PerformanceFront } = require("devtools/shared/fronts/performance");
+
+add_task(function* () {
+  let browser = yield addTab(MAIN_DOMAIN + "doc_perf.html");
+  let doc = browser.contentDocument;
+
+  initDebuggerServer();
+  let client = new DebuggerClient(DebuggerServer.connectPipe());
+  let form = yield connectDebuggerClient(client);
+  let front = PerformanceFront(client, form);
+  yield front.connect();
+
+  yield front.setProfilerStatusInterval(10);
+  let model = yield front.startRecording(config);
+  let stats = yield once(front, "profiler-status");
+  is(stats.totalSize, BUFFER_SIZE, `profiler-status event has totalSize: ${stats.totalSize}`);
+  ok(stats.position < BUFFER_SIZE, `profiler-status event has position: ${stats.position}`);
+  ok(stats.generation >= 0, `profiler-status event has generation: ${stats.generation}`);
+  ok(stats.isActive, "profiler-status event is isActive");
+  is(typeof stats.currentTime, "number", "profiler-status event has currentTime");
+
+  // Halt once more for a buffer status to ensure we're beyond 0
+  yield once(front, "profiler-status");
+
+  let lastBufferStatus = 0;
+  let checkCount = 0;
+  while (lastBufferStatus < 1) {
+    let currentBufferStatus = front.getBufferUsageForRecording(model);
+    ok(currentBufferStatus > lastBufferStatus, `buffer is more filled than before: ${currentBufferStatus} > ${lastBufferStatus}`);
+    lastBufferStatus = currentBufferStatus;
+    checkCount++;
+    yield once(front, "profiler-status");
+  }
+
+  ok(checkCount >= 1, "atleast 1 event were fired until the buffer was filled");
+  is(lastBufferStatus, 1, "buffer usage cannot surpass 100%");
+  yield front.stopRecording(model);
+
+  is(front.getBufferUsageForRecording(model), null, "buffer usage should be null when no longer recording.");
+
+  yield front.destroy();
+  yield client.close();
+  gBrowser.removeCurrentTab();
+});