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#include "tests/common/win/testing_common.h"
#include "core/cross/math_utilities.h"
#include "core/cross/object_manager.h"
#include "core/cross/pack.h"
#include "core/cross/service_dependency.h"
#include "core/cross/matrix4_translation.h"

namespace o3d {

class TranslationTest : public testing::Test {
 protected:
  TranslationTest()
      : object_manager_(g_service_locator),
        pack_(NULL),
        translation_(NULL) {
  }

  virtual void SetUp() {
    pack_ = object_manager_->CreatePack();
    translation_ = pack_->Create<Matrix4Translation>();
  }

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

 protected:
  ServiceDependency<ObjectManager> object_manager_;
  Pack* pack_;
  Matrix4Translation* translation_;
};

TEST_F(TranslationTest, OutputsInputTranslationAsMatrixIfNoParent) {
  translation_->set_translation(Float3(1, 2, 3));
  Matrix4 output_matrix = translation_->output_matrix();
  Matrix4 expected(Vector4(1, 0, 0, 0), Vector4(0, 1, 0, 0),
                   Vector4(0, 0, 1, 0), Vector4(1, 2, 3, 1));
  ASSERT_NEAR(0.0f, FrobeniusNorm(expected - output_matrix), 0.001f);
}

TEST_F(TranslationTest, ComposesInputTranslationWithParentMatrix) {
  translation_->set_translation(Float3(1, 2, 3));
  Matrix4 parent = Matrix4::translation(Vector3(3, 4, 5));
  translation_->set_input_matrix(parent);
  Matrix4 output_matrix = translation_->output_matrix();
  Matrix4 expected = Matrix4::translation(Vector3(4, 6, 8));
  ASSERT_NEAR(0.0f, FrobeniusNorm(expected - output_matrix), 0.001f);
}
}  // namespace o3d