@Test
public void testThatTriangleSoupIsInitiallyEmpty() {

    TriangleSoup soup = new TriangleSoup();
    List<Triangle2D> triangles = soup.getTriangles();
    Assert.assertNotNull("The returned list should not be null.", triangles);
    Assert.assertEquals("The triangle soup should not contain any triangles if no triangles were added.", 0,
            triangles.size());
}