import * as THREE from 'three'; test('should behave...', () => { let p1 = new THREE.Vector3(0, 0, 0); let p2 = new THREE.Vector3(1, 0, 0); let p3 = new THREE.Vector3(0.5, 0.5, 0); let p4 = new THREE.Vector3(0.5, 1, 0); });