offscreen_surface_unittests.cc

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// Copyright 2013 The Flutter 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 "flutter/flow/layers/offscreen_surface.h"
 
#include <memory>
 
#include "gtest/gtest.h"
 
namespace flutter::testing {
 
TEST(OffscreenSurfaceTest, EmptySurfaceIsInvalid) {
  auto surface = std::make_unique<OffscreenSurface>(nullptr, DlISize());
  ASSERT_FALSE(surface->IsValid());
}
 
TEST(OffscreenSurfaceTest, OnexOneSurfaceIsValid) {
  auto surface = std::make_unique<OffscreenSurface>(nullptr, DlISize(1, 1));
  ASSERT_TRUE(surface->IsValid());
}
 
TEST(OffscreenSurfaceTest, PaintSurfaceBlack) {
  auto surface = std::make_unique<OffscreenSurface>(nullptr, DlISize(1, 1));
 
  DlCanvas* canvas = surface->GetCanvas();
  canvas->Clear(DlColor::kBlack());
  canvas->Flush();
 
  auto raster_data = surface->GetRasterData(false);
  const uint32_t* actual =
      reinterpret_cast<const uint32_t*>(raster_data->data());
 
  // picking black as the color since byte ordering seems to matter.
  ASSERT_EQ(actual[0], 0xFF000000u);
}
 
}  // namespace flutter::testing