virtualx-engine/tests/scene/test_tree.h

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/*  test_tree.h                                                           */
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#ifndef TEST_TREE_H
#define TEST_TREE_H

#include "scene/gui/tree.h"

#include "tests/test_macros.h"

namespace TestTree {

TEST_CASE("[SceneTree][Tree]") {
	SUBCASE("[Tree] Create and remove items.") {
		Tree *tree = memnew(Tree);
		TreeItem *root = tree->create_item();

		TreeItem *child1 = tree->create_item();
		CHECK_EQ(root->get_child_count(), 1);

		TreeItem *child2 = tree->create_item(root);
		CHECK_EQ(root->get_child_count(), 2);

		TreeItem *child3 = tree->create_item(root, 0);
		CHECK_EQ(root->get_child_count(), 3);

		CHECK_EQ(root->get_child(0), child3);
		CHECK_EQ(root->get_child(1), child1);
		CHECK_EQ(root->get_child(2), child2);

		root->remove_child(child3);
		CHECK_EQ(root->get_child_count(), 2);

		root->add_child(child3);
		CHECK_EQ(root->get_child_count(), 3);

		TreeItem *child4 = root->create_child();
		CHECK_EQ(root->get_child_count(), 4);

		CHECK_EQ(root->get_child(0), child1);
		CHECK_EQ(root->get_child(1), child2);
		CHECK_EQ(root->get_child(2), child3);
		CHECK_EQ(root->get_child(3), child4);

		memdelete(tree);
	}

	SUBCASE("[Tree] Clear items.") {
		Tree *tree = memnew(Tree);
		TreeItem *root = tree->create_item();

		for (int i = 0; i < 10; i++) {
			tree->create_item();
		}
		CHECK_EQ(root->get_child_count(), 10);

		root->clear_children();
		CHECK_EQ(root->get_child_count(), 0);

		memdelete(tree);
	}

	SUBCASE("[Tree] Get last item.") {
		Tree *tree = memnew(Tree);
		TreeItem *root = tree->create_item();

		TreeItem *last;
		for (int i = 0; i < 10; i++) {
			last = tree->create_item();
		}
		CHECK_EQ(root->get_child_count(), 10);
		CHECK_EQ(tree->get_last_item(), last);

		// Check nested.
		TreeItem *old_last = last;
		for (int i = 0; i < 10; i++) {
			last = tree->create_item(old_last);
		}
		CHECK_EQ(tree->get_last_item(), last);

		memdelete(tree);
	}

	// https://github.com/godotengine/godot/issues/96205
	SUBCASE("[Tree] Get last item after removal.") {
		Tree *tree = memnew(Tree);
		TreeItem *root = tree->create_item();

		TreeItem *child1 = tree->create_item(root);
		TreeItem *child2 = tree->create_item(root);

		CHECK_EQ(root->get_child_count(), 2);
		CHECK_EQ(tree->get_last_item(), child2);

		root->remove_child(child2);

		CHECK_EQ(root->get_child_count(), 1);
		CHECK_EQ(tree->get_last_item(), child1);

		root->add_child(child2);

		CHECK_EQ(root->get_child_count(), 2);
		CHECK_EQ(tree->get_last_item(), child2);

		memdelete(tree);
	}

	SUBCASE("[Tree] Previous and Next items.") {
		Tree *tree = memnew(Tree);
		TreeItem *root = tree->create_item();

		TreeItem *child1 = tree->create_item();
		TreeItem *child2 = tree->create_item();
		TreeItem *child3 = tree->create_item();
		CHECK_EQ(child1->get_next(), child2);
		CHECK_EQ(child1->get_next_in_tree(), child2);
		CHECK_EQ(child2->get_next(), child3);
		CHECK_EQ(child2->get_next_in_tree(), child3);
		CHECK_EQ(child3->get_next(), nullptr);
		CHECK_EQ(child3->get_next_in_tree(), nullptr);

		CHECK_EQ(child1->get_prev(), nullptr);
		CHECK_EQ(child1->get_prev_in_tree(), root);
		CHECK_EQ(child2->get_prev(), child1);
		CHECK_EQ(child2->get_prev_in_tree(), child1);
		CHECK_EQ(child3->get_prev(), child2);
		CHECK_EQ(child3->get_prev_in_tree(), child2);

		TreeItem *nested1 = tree->create_item(child2);
		TreeItem *nested2 = tree->create_item(child2);
		TreeItem *nested3 = tree->create_item(child2);

		CHECK_EQ(child1->get_next(), child2);
		CHECK_EQ(child1->get_next_in_tree(), child2);
		CHECK_EQ(child2->get_next(), child3);
		CHECK_EQ(child2->get_next_in_tree(), nested1);
		CHECK_EQ(child3->get_prev(), child2);
		CHECK_EQ(child3->get_prev_in_tree(), nested3);
		CHECK_EQ(nested1->get_prev_in_tree(), child2);
		CHECK_EQ(nested1->get_next_in_tree(), nested2);

		memdelete(tree);
	}
}

} // namespace TestTree

#endif // TEST_TREE_H