yoga/tests/YGComputedMarginTest.cpp

/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

#include <gtest/gtest.h>
#include <yoga/Yoga.h>
#include <array>

TEST(YogaTest, computed_layout_margin) {
  YGNodeRef root = YGNodeNew();
  YGNodeStyleSetWidth(root, 100);
  YGNodeStyleSetHeight(root, 100);
  YGNodeStyleSetMarginPercent(root, YGEdgeStart, 10);

  YGNodeCalculateLayout(root, 100, 100, YGDirectionLTR);

  ASSERT_FLOAT_EQ(10, YGNodeLayoutGetMargin(root, YGEdgeLeft));
  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetMargin(root, YGEdgeRight));

  YGNodeCalculateLayout(root, 100, 100, YGDirectionRTL);

  ASSERT_FLOAT_EQ(0, YGNodeLayoutGetMargin(root, YGEdgeLeft));
  ASSERT_FLOAT_EQ(10, YGNodeLayoutGetMargin(root, YGEdgeRight));

  YGNodeFreeRecursive(root);
}

TEST(YogaTest, margin_side_overrides_horizontal_and_vertical) {
  const std::array<YGEdge, 6> edges = {
      {YGEdgeTop,
       YGEdgeBottom,
       YGEdgeStart,
       YGEdgeEnd,
       YGEdgeLeft,
       YGEdgeRight}};

  for (float edgeValue = 0; edgeValue < 2; ++edgeValue) {
    for (const auto& edge : edges) {
      YGEdge horizontalOrVertical = edge == YGEdgeTop || edge == YGEdgeBottom
          ? YGEdgeVertical
          : YGEdgeHorizontal;

      YGNodeRef root = YGNodeNew();
      YGNodeStyleSetWidth(root, 100);
      YGNodeStyleSetHeight(root, 100);
      YGNodeStyleSetMargin(root, horizontalOrVertical, 10);
      YGNodeStyleSetMargin(root, edge, edgeValue);

      YGNodeCalculateLayout(root, 100, 100, YGDirectionLTR);

      ASSERT_FLOAT_EQ(edgeValue, YGNodeLayoutGetMargin(root, edge));

      YGNodeFreeRecursive(root);
    }
  }
}

TEST(YogaTest, margin_side_overrides_all) {
  const std::array<YGEdge, 6> edges = {
      {YGEdgeTop,
       YGEdgeBottom,
       YGEdgeStart,
       YGEdgeEnd,
       YGEdgeLeft,
       YGEdgeRight}};

  for (float edgeValue = 0; edgeValue < 2; ++edgeValue) {
    for (const auto& edge : edges) {
      YGNodeRef root = YGNodeNew();
      YGNodeStyleSetWidth(root, 100);
      YGNodeStyleSetHeight(root, 100);
      YGNodeStyleSetMargin(root, YGEdgeAll, 10);
      YGNodeStyleSetMargin(root, edge, edgeValue);

      YGNodeCalculateLayout(root, 100, 100, YGDirectionLTR);

      ASSERT_FLOAT_EQ(edgeValue, YGNodeLayoutGetMargin(root, edge));

      YGNodeFreeRecursive(root);
    }
  }
}

TEST(YogaTest, margin_horizontal_and_vertical_overrides_all) {
  const std::array<YGEdge, 2> directions = {{YGEdgeHorizontal, YGEdgeVertical}};

  for (float directionValue = 0; directionValue < 2; ++directionValue) {
    for (const auto& direction : directions) {
      YGNodeRef root = YGNodeNew();
      YGNodeStyleSetWidth(root, 100);
      YGNodeStyleSetHeight(root, 100);
      YGNodeStyleSetMargin(root, YGEdgeAll, 10);
      YGNodeStyleSetMargin(root, direction, directionValue);

      YGNodeCalculateLayout(root, 100, 100, YGDirectionLTR);

      if (direction == YGEdgeVertical) {
        ASSERT_FLOAT_EQ(directionValue, YGNodeLayoutGetMargin(root, YGEdgeTop));
        ASSERT_FLOAT_EQ(
            directionValue, YGNodeLayoutGetMargin(root, YGEdgeBottom));
      } else {
        ASSERT_FLOAT_EQ(
            directionValue, YGNodeLayoutGetMargin(root, YGEdgeStart));
        ASSERT_FLOAT_EQ(directionValue, YGNodeLayoutGetMargin(root, YGEdgeEnd));
        ASSERT_FLOAT_EQ(
            directionValue, YGNodeLayoutGetMargin(root, YGEdgeLeft));
        ASSERT_FLOAT_EQ(
            directionValue, YGNodeLayoutGetMargin(root, YGEdgeRight));
      }

      YGNodeFreeRecursive(root);
    }
  }
}