452 lines
8.6 KiB
JavaScript
452 lines
8.6 KiB
JavaScript
import {parse as acornParse} from 'acorn';
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import {expect, test} from 'vitest';
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import Sandbox from '@/astride/sandbox.js';
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function parse(code, options = {}) {
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return acornParse(code, {
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ecmaVersion: 'latest',
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sourceType: 'module',
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...options,
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})
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}
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async function finish(sandbox) {
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let result;
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let i = 0;
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do {
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result = sandbox.step();
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if (result.async) {
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await result.value;
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}
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} while (!result.done && ++i < 1000);
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return result;
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}
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test('declares variables', async () => {
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const sandbox = new Sandbox(
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await parse(`
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const scalar = true ? +1 : 32;
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const asyncScalar = await 2;
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const array = [3, 4, 5];
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const asyncArray = await [6, 7, 8];
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const object = {9: '10'};
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const asyncObject = await {11: '12'};
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`),
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);
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await finish(sandbox);
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expect(sandbox.context)
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.to.deep.equal({
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scalar: 1,
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asyncScalar: 2,
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array: [3, 4, 5],
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asyncArray: [6, 7, 8],
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object: {9: '10'},
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asyncObject: {11: '12'},
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});
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});
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test('scopes variables', async () => {
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const sandbox = new Sandbox(
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await parse(`
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const result = [];
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const scalar = 1;
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result.push(scalar);
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{
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const scalar = 2;
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result.push(scalar);
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}
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result.push(scalar);
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`),
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);
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await finish(sandbox);
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expect(sandbox.context.result)
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.to.deep.equal([1, 2, 1]);
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});
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test('returns last', async () => {
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const sandbox = new Sandbox(
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await parse(`
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foo = 32;
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{
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bar = 64;
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}
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`),
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);
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expect(await finish(sandbox))
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.to.deep.include({done: true, value: 64});
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});
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test('destructures variables', async () => {
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const sandbox = new Sandbox(
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await parse(`
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const [a, , c] = [1, 2, 3];
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const {x: x1, y, z: {zz}} = {x: 4, y: 5, z: {zz: 6}};
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const [d, e] = await [7, 8];
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const {t, u: {uu}} = {t: 9, u: {uu: await 10}};
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`),
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);
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await finish(sandbox);
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expect(sandbox.context)
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.to.deep.equal({
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a: 1,
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c: 3,
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x1: 4,
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y: 5,
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zz: 6,
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d: 7,
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e: 8,
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t: 9,
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uu: 10,
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});
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});
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test('runs arbitrary number of ops', async () => {
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const sandbox = new Sandbox(
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await parse(`
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const foo = [];
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for (let i = 0; i < 150; ++i) {
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foo.push(i);
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}
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`),
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);
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sandbox.run(100);
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expect(sandbox.context.foo.length)
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.to.equal(100);
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sandbox.run(100);
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expect(sandbox.context.foo.length)
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.to.equal(150);
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});
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test('evaluates conditional branches', async () => {
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const sandbox = new Sandbox(
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await parse(`
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let foo, bar;
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if (true) {
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foo = 1;
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}
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else {
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foo = 2;
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}
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if (await false) {
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bar = 1;
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}
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else {
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bar = 2;
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}
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if (await false) {
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bar = 1;
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}
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`),
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);
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await finish(sandbox);
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expect(sandbox.context)
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.to.deep.equal({
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foo: 1,
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bar: 2,
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});
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});
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test('evaluates conditional expressions', async () => {
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const sandbox = new Sandbox(
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await parse(`
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const x = true || false ? 1 : 2
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const y = false && true ? 1 : 2
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const a = (await true) ? await 1 : await 2
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const b = (await false) ? await 1 : await 2
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xx = true || false ? 1 : 2
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yy = false && true ? 1 : 2
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aa = (await true) ? await 1 : await 2
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bb = (await false) ? await 1 : await 2
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`),
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);
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await finish(sandbox);
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expect(sandbox.context)
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.to.deep.equal({
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x: 1,
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y: 2,
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a: 1,
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b: 2,
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xx: 1,
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yy: 2,
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aa: 1,
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bb: 2,
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});
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});
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test('evaluates loops', async () => {
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const sandbox = new Sandbox(
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await parse(`
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x = 0
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y = 0
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a = 0
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b = 0
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c = 0
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d = 0
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for (let i = 0; i < 3; ++i) {
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x += 1;
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}
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for (let i = await 0; i < await 3; i = 1 + await i) {
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y += 1;
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}
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do {
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a += 1;
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} while (a < 3);
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do {
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b += await 1;
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} while (await b < 3);
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while (c < 3) {
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c += 1;
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}
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while (await d < 3) {
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d += await 1;
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}
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`),
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);
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await finish(sandbox);
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expect(sandbox.context)
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.to.deep.equal({
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a: 3,
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b: 3,
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c: 3,
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d: 3,
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x: 3,
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y: 3,
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});
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});
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test('evaluates undefined for nonexistent variables in scope', async () => {
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const sandbox = new Sandbox(
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await parse(`
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const x = y
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`),
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);
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sandbox.run();
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expect(sandbox.context)
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.to.deep.equal({
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x: undefined,
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});
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});
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test('returns values at the top level', async () => {
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let sandbox;
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sandbox = new Sandbox(
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await parse(`
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x = 16
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y = 4
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return [x * 3, y * 3]
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x = 32
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y = 8
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`, {allowReturnOutsideFunction: true}),
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);
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expect(sandbox.run().value)
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.to.deep.equal([48, 12]);
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expect(sandbox.context)
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.to.deep.equal({x: 16, y: 4});
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sandbox = new Sandbox(
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await parse(`
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x = 16
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y = 4
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return await [x * 3, y * 3]
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x = 32
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y = 8
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`, {allowReturnOutsideFunction: true}),
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);
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expect((await finish(sandbox)).value)
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.to.deep.equal([48, 12]);
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expect(sandbox.context)
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.to.deep.equal({x: 16, y: 4});
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sandbox = new Sandbox(
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await parse(`
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x = 16
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y = 4
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return
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x = 32
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y = 8
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`, {allowReturnOutsideFunction: true}),
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);
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sandbox.run();
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expect(sandbox.context)
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.to.deep.equal({x: 16, y: 4});
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});
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test('returns arbitrarily', async () => {
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let sandbox;
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sandbox = new Sandbox(
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await parse(`
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x = 16
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y = 4
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if (x === 16) {
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return false
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}
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`, {allowReturnOutsideFunction: true}),
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);
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const {value} = sandbox.run();
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expect(value)
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.to.deep.equal(false);
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expect(sandbox.context)
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.to.deep.equal({x: 16, y: 4});
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});
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test('sets variables in global scope', async () => {
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const sandbox = new Sandbox(
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await parse(`
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x = y
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`),
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);
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sandbox.run();
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expect(sandbox.context)
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.to.deep.equal({
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x: undefined,
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});
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});
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test('runs arbitrary number of ops', async () => {
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const sandbox = new Sandbox(
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await parse(`
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const foo = [];
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for (let i = 0; i < 1500; ++i) {
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foo.push(i);
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}
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`),
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);
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sandbox.run(1000);
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expect(sandbox.context.foo.length)
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.to.equal(1000);
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sandbox.run(1000);
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expect(sandbox.context.foo.length)
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.to.equal(1500);
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expect(true)
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.to.be.true;
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});
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test('clears for loop deferred context', async () => {
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const context = {x: 10};
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const sandbox = new Sandbox(
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await parse(`
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let l = 0
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for (let i = 0; i < x; ++i) {
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l += 1
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}
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`),
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context,
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);
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expect(sandbox.run())
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.to.deep.include({
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value: 10,
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});
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context.x = 0
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expect(sandbox.run())
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.to.deep.include({
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value: undefined,
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});
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});
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test('clears while loop deferred context', async () => {
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const context = {x: 10};
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const sandbox = new Sandbox(
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await parse(`
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let l = 0
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while (l < x) {
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l += 1
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}
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`),
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context,
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);
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expect(sandbox.run())
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.to.deep.include({
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value: 10,
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});
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context.x = 0
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expect(sandbox.run())
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.to.deep.include({
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value: undefined,
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});
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});
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test('executes member expressions', async () => {
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const sandbox = new Sandbox(
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await parse(`
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let l = {}
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l.f = 54
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if (l.f) {
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l.g = 65
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}
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`),
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);
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expect(sandbox.run())
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.to.deep.include({
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value: 65,
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});
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});
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test('handles nested yields', async () => {
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expect(
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await finish(new Sandbox(
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await parse(`
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for (let i = 0; i < 1; ++i) {
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for (let j = 0; j < 1; ++j) {
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}
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}
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`),
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))
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)
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.to.deep.include({value: undefined});
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expect(
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(
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await finish(new Sandbox(
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await parse(`
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for (let i = 0; i < 1; ++i) {
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for (let j = 0; j < 1; ++j) {
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await 1;
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}
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}
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`),
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))
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)
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)
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.to.deep.include({value: 1});
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expect(
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(
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await finish(new Sandbox(
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await parse(`
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if (true) {
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for (let i = 0; i < 1; ++i) {
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}
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}
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`),
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))
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)
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)
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.to.deep.include({value: undefined});
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expect(
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(
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await finish(new Sandbox(
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await parse(`
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if (1 ? await 2 : 3) {
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for (let i = 0; i < 1; ++i) {
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}
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}
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`),
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))
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)
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)
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.to.deep.include({value: undefined});
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});
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test('handles optional expressions', async () => {
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const context = {
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console,
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projected: undefined,
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}
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const sandbox = new Sandbox(
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await parse(`
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if (projected?.length > 0) {
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}
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`),
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context,
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);
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expect(sandbox.run())
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.to.deep.include({value: undefined});
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});
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