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#include "tests/common/win/testing_common.h"
#include "core/cross/matrix4_composition.h"
#include "core/cross/math_utilities.h"
#include "core/cross/object_manager.h"
#include "core/cross/pack.h"
#include "core/cross/service_dependency.h"

namespace o3d {

class Matrix4CompositionTest : public testing::Test {
 protected:
  Matrix4CompositionTest()
      : object_manager_(g_service_locator),
        pack_(NULL),
        composition_(NULL) {
  }

  virtual void SetUp() {
    pack_ = object_manager_->CreatePack();
    composition_ = pack_->Create<Matrix4Composition>();
  }

  virtual void TearDown() {
    pack_->Destroy();
  }

 protected:
  ServiceDependency<ObjectManager> object_manager_;
  Pack* pack_;
  Matrix4Composition* composition_;
};

TEST_F(Matrix4CompositionTest, OutputsInputMatrixIfNoParent) {
  Matrix4 input = Matrix4::scale(Vector3(2, 3, 4));
  composition_->set_local_matrix(input);
  Matrix4 output_matrix = composition_->output_matrix();
  ASSERT_NEAR(0.0f, FrobeniusNorm(input - output_matrix), 0.001f);
}

TEST_F(Matrix4CompositionTest, ComposesInputMatrixWithParentMatrix) {
  Matrix4 input = Matrix4::scale(Vector3(2, 3, 4));
  composition_->set_local_matrix(input);
  Matrix4 parent = Matrix4::scale(Vector3(3, 4, 5));
  composition_->set_input_matrix(parent);
  Matrix4 output_matrix = composition_->output_matrix();
  Matrix4 expected = Matrix4::scale(Vector3(6, 12, 20));
  ASSERT_NEAR(0.0f, FrobeniusNorm(expected - output_matrix), 0.001f);
}
}  // namespace o3d