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Add tests for LayoutableChildren 
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‎tests/YGLayoutableChildrenTest.cpp

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/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#include <gtest/gtest.h>
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#include <yoga/Yoga.h>
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#include <yoga/node/Node.h>
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#include <cstdio>
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TEST(YogaTest, layoutable_children_single_contents_node) {
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YGNodeRef root = YGNodeNew();
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YGNodeRef root_child0 = YGNodeNew();
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YGNodeRef root_child1 = YGNodeNew();
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YGNodeRef root_child2 = YGNodeNew();
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YGNodeRef root_grandchild0 = YGNodeNew();
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YGNodeRef root_grandchild1 = YGNodeNew();
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YGNodeInsertChild(root, root_child0, 0);
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YGNodeInsertChild(root, root_child1, 1);
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YGNodeInsertChild(root, root_child2, 2);
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YGNodeInsertChild(root_child1, root_grandchild0, 0);
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YGNodeInsertChild(root_child1, root_grandchild1, 1);
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YGNodeStyleSetDisplay(root_child1, YGDisplayContents);
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std::vector<facebook::yoga::Node*> order = {
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facebook::yoga::resolveRef(root_child0),
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facebook::yoga::resolveRef(root_grandchild0),
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facebook::yoga::resolveRef(root_grandchild1),
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facebook::yoga::resolveRef(root_child2),
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};
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auto correctOrderIt = order.begin();
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for (auto node : facebook::yoga::resolveRef(root)->getLayoutChildren()) {
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ASSERT_EQ(node, *correctOrderIt);
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correctOrderIt++;
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}
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YGNodeFreeRecursive(root);
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}
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TEST(YogaTest, layoutable_children_multiple_contents_nodes) {
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YGNodeRef root = YGNodeNew();
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YGNodeRef root_child0 = YGNodeNew();
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YGNodeRef root_child1 = YGNodeNew();
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YGNodeRef root_child2 = YGNodeNew();
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YGNodeRef root_grandchild0 = YGNodeNew();
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YGNodeRef root_grandchild1 = YGNodeNew();
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YGNodeRef root_grandchild2 = YGNodeNew();
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YGNodeRef root_grandchild3 = YGNodeNew();
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YGNodeRef root_grandchild4 = YGNodeNew();
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YGNodeRef root_grandchild5 = YGNodeNew();
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YGNodeInsertChild(root, root_child0, 0);
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YGNodeInsertChild(root, root_child1, 1);
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YGNodeInsertChild(root, root_child2, 2);
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YGNodeInsertChild(root_child0, root_grandchild0, 0);
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YGNodeInsertChild(root_child0, root_grandchild1, 1);
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YGNodeInsertChild(root_child1, root_grandchild2, 0);
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YGNodeInsertChild(root_child1, root_grandchild3, 1);
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YGNodeInsertChild(root_child2, root_grandchild4, 0);
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YGNodeInsertChild(root_child2, root_grandchild5, 1);
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YGNodeStyleSetDisplay(root_child0, YGDisplayContents);
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YGNodeStyleSetDisplay(root_child1, YGDisplayContents);
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YGNodeStyleSetDisplay(root_child2, YGDisplayContents);
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std::vector<facebook::yoga::Node*> order = {
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facebook::yoga::resolveRef(root_grandchild0),
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facebook::yoga::resolveRef(root_grandchild1),
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facebook::yoga::resolveRef(root_grandchild2),
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facebook::yoga::resolveRef(root_grandchild3),
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facebook::yoga::resolveRef(root_grandchild4),
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facebook::yoga::resolveRef(root_grandchild5),
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};
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auto correctOrderIt = order.begin();
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for (auto node : facebook::yoga::resolveRef(root)->getLayoutChildren()) {
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ASSERT_EQ(node, *correctOrderIt);
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correctOrderIt++;
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}
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YGNodeFreeRecursive(root);
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}
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TEST(YogaTest, layoutable_children_nested_contents_nodes) {
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YGNodeRef root = YGNodeNew();
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YGNodeRef root_child0 = YGNodeNew();
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YGNodeRef root_child1 = YGNodeNew();
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YGNodeRef root_child2 = YGNodeNew();
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YGNodeRef root_grandchild0 = YGNodeNew();
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YGNodeRef root_grandchild1 = YGNodeNew();
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YGNodeRef root_great_grandchild0 = YGNodeNew();
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YGNodeRef root_great_grandchild1 = YGNodeNew();
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YGNodeInsertChild(root, root_child0, 0);
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YGNodeInsertChild(root, root_child1, 1);
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YGNodeInsertChild(root, root_child2, 2);
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YGNodeInsertChild(root_child1, root_grandchild0, 0);
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YGNodeInsertChild(root_child1, root_grandchild1, 1);
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YGNodeInsertChild(root_grandchild1, root_great_grandchild0, 0);
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YGNodeInsertChild(root_grandchild1, root_great_grandchild1, 1);
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YGNodeStyleSetDisplay(root_child1, YGDisplayContents);
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YGNodeStyleSetDisplay(root_grandchild1, YGDisplayContents);
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std::vector<facebook::yoga::Node*> order = {
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facebook::yoga::resolveRef(root_child0),
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facebook::yoga::resolveRef(root_grandchild0),
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facebook::yoga::resolveRef(root_great_grandchild0),
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facebook::yoga::resolveRef(root_great_grandchild1),
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facebook::yoga::resolveRef(root_child2),
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};
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auto correctOrderIt = order.begin();
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for (auto node : facebook::yoga::resolveRef(root)->getLayoutChildren()) {
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ASSERT_EQ(node, *correctOrderIt);
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correctOrderIt++;
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}
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YGNodeFreeRecursive(root);
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}
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TEST(YogaTest, layoutable_children_contents_leaf_node) {
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YGNodeRef root = YGNodeNew();
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YGNodeRef root_child0 = YGNodeNew();
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YGNodeRef root_child1 = YGNodeNew();
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YGNodeRef root_child2 = YGNodeNew();
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YGNodeInsertChild(root, root_child0, 0);
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YGNodeInsertChild(root, root_child1, 1);
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YGNodeInsertChild(root, root_child2, 2);
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YGNodeStyleSetDisplay(root_child1, YGDisplayContents);
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std::vector<facebook::yoga::Node*> order = {
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facebook::yoga::resolveRef(root_child0),
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facebook::yoga::resolveRef(root_child2),
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};
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auto correctOrderIt = order.begin();
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for (auto node : facebook::yoga::resolveRef(root)->getLayoutChildren()) {
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ASSERT_EQ(node, *correctOrderIt);
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correctOrderIt++;
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}
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YGNodeFreeRecursive(root);
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}
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TEST(YogaTest, layoutable_children_contents_root_node) {
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YGNodeRef root = YGNodeNew();
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YGNodeRef root_child0 = YGNodeNew();
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YGNodeRef root_child1 = YGNodeNew();
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YGNodeRef root_child2 = YGNodeNew();
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YGNodeInsertChild(root, root_child0, 0);
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YGNodeInsertChild(root, root_child1, 1);
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YGNodeInsertChild(root, root_child2, 2);
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YGNodeStyleSetDisplay(root, YGDisplayContents);
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std::vector<facebook::yoga::Node*> order = {
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facebook::yoga::resolveRef(root_child0),
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facebook::yoga::resolveRef(root_child1),
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facebook::yoga::resolveRef(root_child2),
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};
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auto correctOrderIt = order.begin();
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for (auto node : facebook::yoga::resolveRef(root)->getLayoutChildren()) {
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ASSERT_EQ(node, *correctOrderIt);
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correctOrderIt++;
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}
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YGNodeFreeRecursive(root);
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}

‎yoga/node/LayoutableChildren.h

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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#pragma once
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#include <cstdint>
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#include <vector>

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