1 files changed, 74 insertions, 0 deletions
diff --git a/devtools/server/tests/unit/test_promises_object_timetosettle-02.js b/devtools/server/tests/unit/test_promises_object_timetosettle-02.js
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+++ b/devtools/server/tests/unit/test_promises_object_timetosettle-02.js
@@ -0,0 +1,74 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Test that we get the expected settlement time for promise time to settle.
+ */
+
+"use strict";
+
+const { PromisesFront } = require("devtools/shared/fronts/promises");
+const { setTimeout } = require("sdk/timers");
+
+var events = require("sdk/event/core");
+
+add_task(function* () {
+  let client = yield startTestDebuggerServer("test-promises-timetosettle");
+  let chromeActors = yield getChromeActors(client);
+  yield attachTab(client, chromeActors);
+
+  ok(Promise.toString().includes("native code"), "Expect native DOM Promise.");
+
+  // We have to attach the chrome TabActor before playing with the PromiseActor
+  yield attachTab(client, chromeActors);
+  yield testGetTimeToSettle(client, chromeActors,
+    v => new Promise(resolve => setTimeout(() => resolve(v), 100)));
+
+  let response = yield listTabs(client);
+  let targetTab = findTab(response.tabs, "test-promises-timetosettle");
+  ok(targetTab, "Found our target tab.");
+  yield attachTab(client, targetTab);
+
+  yield testGetTimeToSettle(client, targetTab, v => {
+    const debuggee =
+      DebuggerServer.getTestGlobal("test-promises-timetosettle");
+    return new debuggee.Promise(resolve => setTimeout(() => resolve(v), 100));
+  });
+
+  yield close(client);
+});
+
+function* testGetTimeToSettle(client, form, makePromise) {
+  let front = PromisesFront(client, form);
+  let resolution = "MyLittleSecret" + Math.random();
+  let found = false;
+
+  yield front.attach();
+  yield front.listPromises();
+
+  let onNewPromise = new Promise(resolve => {
+    events.on(front, "promises-settled", promises => {
+      for (let p of promises) {
+        if (p.promiseState.state === "fulfilled" &&
+            p.promiseState.value === resolution) {
+          let timeToSettle = Math.floor(p.promiseState.timeToSettle / 100) * 100;
+          ok(timeToSettle >= 100,
+            "Expect time to settle for resolved promise to be " +
+            "at least 100ms, got " + timeToSettle + "ms.");
+          found = true;
+          resolve();
+        } else {
+          dump("Found non-target promise.\n");
+        }
+      }
+    });
+  });
+
+  let promise = makePromise(resolution);
+
+  yield onNewPromise;
+  ok(found, "Found our new promise.");
+  yield front.detach();
+  // Appease eslint
+  void promise;
+}