@threlte/core
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A 3D framework for the web, built on top of Svelte and Three.js
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JavaScript
import { BufferGeometry, Group, Mesh, MeshBasicMaterial, PerspectiveCamera } from 'three';
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls.js';
import { describe, it, expect, vi } from 'vitest';
import { render } from '@threlte/test';
import { extend, T } from '../T';
import Bindable from './__fixtures__/Bindable.svelte';
describe('<T>', () => {
it('instantiates a Three.js object when the "is" argument is a class', () => {
const { scene } = render(T, { props: { is: Group } });
expect(scene.getObjectByProperty('type', 'Group')).not.toBeFalsy();
});
it('instantiates a Three.js object when a property is accessed', () => {
const { scene } = render(T.Group);
expect(scene.getObjectByProperty('type', 'Group')).not.toBeFalsy();
});
it('reuses a Three.js class instance passed to an "is" argument', () => {
const group = new Group();
const { scene } = render(T, { props: { is: group } });
expect(scene.getObjectByProperty('type', group.type)).toBe(group);
});
it('passes "args" to a class constructor', () => {
const geometry = new BufferGeometry();
const material = new MeshBasicMaterial();
const { scene } = render(T.Mesh, { props: { args: [geometry, material] } });
const mesh = scene.getObjectByProperty('type', 'Mesh');
expect(mesh.geometry).toBe(geometry);
expect(mesh.material).toBe(material);
});
it('extends the Three.js catalogue', () => {
extend({ OrbitControls });
const oncreate = vi.fn();
render(T.OrbitControls, {
props: { oncreate, args: [new PerspectiveCamera(), document.createElement('div')] }
});
expect(oncreate).toHaveBeenCalledOnce();
});
it('creates a bindable ref', async () => {
const group = new Group();
const onRefCreate = vi.fn();
render(Bindable, { props: { is: group, onRefCreate } });
expect(onRefCreate).toHaveBeenCalledTimes(2);
expect(onRefCreate).toHaveBeenNthCalledWith(1, undefined);
expect(onRefCreate).toHaveBeenNthCalledWith(2, group);
});
});