chromium/src/third_party/blink/renderer/core/style/style_difference_test.cc

// Copyright 2017 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 "third_party/blink/renderer/core/style/style_difference.h"

#include <sstream>
#include "testing/gtest/include/gtest/gtest.h"

namespace blink {

TEST(StyleDifferenceTest, StreamOutputDefault) {
  std::stringstream string_stream;
  StyleDifference diff;
  string_stream << diff;
  EXPECT_EQ(
      "StyleDifference{layoutType=NoLayout, "
      "reshape=0, "
      "paintInvalidation=0, recomputeVisualOverflow=0, "
      "visualRectUpdate=0, propertySpecificDifferences=, "
      "scrollAnchorDisablingPropertyChanged=0}",
      string_stream.str());
}

TEST(StyleDifferenceTest, StreamOutputAllFieldsMutated) {
  std::stringstream string_stream;
  StyleDifference diff;
  diff.SetNeedsPaintInvalidation();
  diff.SetNeedsPositionedMovementLayout();
  diff.SetNeedsReshape();
  diff.SetNeedsRecomputeVisualOverflow();
  diff.SetNeedsVisualRectUpdate();
  diff.SetTransformChanged();
  diff.SetScrollAnchorDisablingPropertyChanged();
  string_stream << diff;
  EXPECT_EQ(
      "StyleDifference{layoutType=PositionedMovement, "
      "reshape=1, paintInvalidation=1, "
      "recomputeVisualOverflow=1, visualRectUpdate=1, "
      "propertySpecificDifferences=TransformChanged, "
      "scrollAnchorDisablingPropertyChanged=1}",
      string_stream.str());
}

TEST(StyleDifferenceTest, StreamOutputSetAllProperties) {
  std::stringstream string_stream;
  StyleDifference diff;
  diff.SetTransformChanged();
  diff.SetOpacityChanged();
  diff.SetZIndexChanged();
  diff.SetFilterChanged();
  diff.SetCSSClipChanged();
  diff.SetTextDecorationOrColorChanged();
  diff.SetBlendModeChanged();
  string_stream << diff;
  EXPECT_EQ(
      "StyleDifference{layoutType=NoLayout, "
      "reshape=0, paintInvalidation=0, "
      "recomputeVisualOverflow=0, visualRectUpdate=0, "
      "propertySpecificDifferences=TransformChanged|OpacityChanged|"
      "ZIndexChanged|FilterChanged|CSSClipChanged|"
      "TextDecorationOrColorChanged|BlendModeChanged, "
      "scrollAnchorDisablingPropertyChanged=0}",
      string_stream.str());
}

}  // namespace blink