TestOfflineClockDriver.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=2 et sw=2 tw=80: */

/* 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/. */

#include "MockGraphInterface.h"

#include "gtest/gtest.h"

#include "mozilla/gtest/WaitFor.h"

using namespace mozilla;

using testing::InSequence;

using testing::Return;

TEST(TestOfflineClockDriver, TimeAdvance)

MOZ_CAN_RUN_SCRIPT_BOUNDARY {

  TrackRate rate =

      CubebUtils::PreferredSampleRate(/* aShouldResistFingerprinting */ false);

  RefPtr graph = new MockGraphInterface(rate);

  RefPtr driver = new OfflineClockDriver(graph, rate);

  MozPromiseHolder<GenericPromise> doneHolder;

  RefPtr<GenericPromise> done = doneHolder.Ensure(__func__);

    GraphTime length = WEBAUDIO_BLOCK_SIZE / 4;  // < WEBAUDIO_BLOCK_SIZE

    auto EnsureNextIteration = [&](GraphTime aTime) {

      driver->EnsureNextIteration();

};

    InSequence s;

    EXPECT_CALL(*graph, MockIteration(0))

        // Time should not advance on the first iteration to process control

        // messages

        .WillOnce(EnsureNextIteration)

        // ... nor on subsequent.

        .WillOnce([&driver, length](GraphTime aTime) {

          driver->SetTickCountToRender(length);

          driver->EnsureNextIteration();

});

    EXPECT_CALL(*graph, MockIteration(WEBAUDIO_BLOCK_SIZE))

        // Rendering iteration

        .WillOnce(EnsureNextIteration)

        // Time should not advance after rendering.

        .WillOnce([&](GraphTime aTime) {

          // Tell the driver to exit its event loop.

          graph->StopIterating();

          doneHolder.Resolve(true, __func__);

});

  graph->SetCurrentDriver(driver);

  driver->EnsureNextIteration();

  driver->Start();

  WaitForResolve(done);

  // Clean up.

  driver->Shutdown();