Excerpt from GameEngineTests

GameObjectTests.cpp

#include <Testing.h>

#include <cstdlib>
#include <ctime>
#include <string>
#include <sstream>
#include <vector>

#include <core/GameObject.h>
#include <math/RandomGenerator.h>

using std::string;
using std::stringstream;
using std::vector;

using Math::RandomGenerator;
using Core::GameObject;
using Core::GameComponent;
using Core::Transform;

//For use in the GameObject.UpdateHierarchy test
vector<int> updateOrder;

TEST(GameObject, DefaultConstruction)
{
	GameObject gameObject;

	int numComponents = gameObject.getNumComponents();
	int numChildren = gameObject.getNumChildren();

	EXPECT_EQ(0, numComponents);
	EXPECT_EQ(0, numChildren);
}

TEST(GameObject, AddComponent)
{
	RandomGenerator* rng = RandomGenerator::getInstance();
	int numComponentsToAdd = rng->irand(1, 10);
	int numTimes = rng->irand(1, 10);

	for (int i = 0; i < numTimes; i++)
	{
		GameObject gameObject;

		for (int j = 0; j < numComponentsToAdd; j++)
		{
			gameObject.addComponent(new GameComponent);
		}

		int numComponents = gameObject.getNumComponents();
		int numChildren = gameObject.getNumChildren();

		EXPECT_EQ(numComponentsToAdd, numComponents);
		EXPECT_EQ(0, numChildren);
	}
}

TEST(GameObject, AddChildren)
{
	GameObject parent;
	GameObject* child1, *child2, *child3, *child4, *child5;
	child1 = new GameObject;
	child2 = new GameObject;
	child3 = new GameObject;
	child4 = new GameObject;
	child5 = new GameObject;

	parent.addChild(child1);
	parent.addChild(child2);
	parent.addChild(child3);
	parent.addChild(child4);
	parent.addChild(child5);

	EXPECT_EQ(5, parent.getNumChildren());
}

TEST(GameObject, ChildHierarchy)
{
	GameObject root;
	GameObject* child1, *child2, *child3;
	GameObject* child1_child1, *child1_child2, *child3_child1;
	GameObject* child1_child2_child1;

	child1 = new GameObject;
	child2 = new GameObject;
	child3 = new GameObject;
	child1_child1 = new GameObject;
	child1_child2 = new GameObject;
	child3_child1 = new GameObject;
	child1_child2_child1 = new GameObject;

	root.addChild(child1);
	root.addChild(child2);
	root.addChild(child3);
	child1->addChild(child1_child1);
	child1->addChild(child1_child2);
	child3->addChild(child3_child1);
	child1_child2->addChild(child1_child2_child1);

	EXPECT_EQ(3, root.getNumChildren());
	EXPECT_EQ(2, child1->getNumChildren());
	EXPECT_EQ(1, child3->getNumChildren());
	EXPECT_EQ(1, child1_child2->getNumChildren());
}