Allow tasks scheduled for the instant virtual time budges expires to run

third_party/WebKit/Source/web/tests/VirtualTimeTest.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/message_loop/message_loop.h"
 #include "core/dom/TaskRunnerHelper.h"
 #include "platform/scheduler/renderer/web_view_scheduler.h"
 #include "platform/testing/UnitTestHelpers.h"
 #include "public/platform/Platform.h"
 #include "public/web/WebLocalFrame.h"
@@ skipping 190 matching lines @@
 
 // http://crbug.com/633321
 #if OS(ANDROID)
 #define MAYBE_DOMTimersSuspended DISABLED_DOMTimersSuspended
 #else
 #define MAYBE_DOMTimersSuspended DOMTimersSuspended
 #endif
 TEST_F(VirtualTimeTest, MAYBE_DOMTimersSuspended) {
   WebView().Scheduler()->EnableVirtualTime();
 
-  // Schedule a normal DOM timer to run at 1s in the future.
+  // Schedule normal DOM timers to run at 1s and 1.001s in the future.
   ExecuteJavaScript(
       "var run_order = [];"
-      "setTimeout(() => { run_order.push(1); }, 1000);");
+      "setTimeout(() => { run_order.push(1); }, 1000);"
+      "setTimeout(() => { run_order.push(2); }, 1001);");
 
   RefPtr<WebTaskRunner> runner =
       TaskRunnerHelper::Get(TaskType::kTimer, Window().GetExecutionContext());
 
   // Schedule a task to suspend virtual time at the same point in time.
   runner->PostDelayedTask(BLINK_FROM_HERE,
                           WTF::Bind(
                               [](WebViewScheduler* scheduler) {
                                 scheduler->SetVirtualTimePolicy(
                                     WebViewScheduler::VirtualTimePolicy::PAUSE);
                               },
                               WTF::Unretained(WebView().Scheduler())),
                           TimeDelta::FromMilliseconds(1000));
 
-  // ALso schedule a second timer for the same point in time.
+  // ALso schedule a third timer for the same point in time.
   ExecuteJavaScript("setTimeout(() => { run_order.push(2); }, 1000);");
 
-  // The second DOM timer shouldn't have run because pausing virtual time also
-  // atomically pauses DOM timers.
+  // The second DOM timer shouldn't have run because the virtual time budget
+  // expired.
   testing::RunPendingTasks();
-  EXPECT_EQ("1", ExecuteJavaScript("run_order.join(', ')"));
+  EXPECT_EQ("1, 2", ExecuteJavaScript("run_order.join(', ')"));
 }
 
 }  // namespace blink