forked from sashin/sashinexists
86 lines
2.4 KiB
JavaScript
86 lines
2.4 KiB
JavaScript
import { ObjectTree } from "@weborigami/async-tree";
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import assert from "node:assert";
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import { describe, test } from "node:test";
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import * as ops from "../../src/runtime/ops.js";
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import evaluate from "../../src/runtime/evaluate.js";
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describe("evaluate", () => {
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test("can retrieve values from scope", async () => {
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const code = createCode([ops.scope, "message"]);
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const parent = new ObjectTree({
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message: "Hello",
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});
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const tree = new ObjectTree({});
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tree.parent = parent;
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const result = await evaluate.call(tree, code);
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assert.equal(result, "Hello");
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});
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test("can invoke functions in scope", async () => {
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// Match the array representation of code generated by the parser.
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const code = createCode([
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[ops.scope, "greet"],
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[ops.scope, "name"],
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]);
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const tree = new ObjectTree({
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async greet(name) {
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return `Hello ${name}`;
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},
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name: "world",
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});
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const result = await evaluate.call(tree, code);
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assert.equal(result, "Hello world");
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});
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test("passes context to invoked functions", async () => {
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const code = createCode([ops.scope, "fn"]);
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const tree = new ObjectTree({
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async fn() {
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assert.equal(this, tree);
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},
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});
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await evaluate.call(tree, code);
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});
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test("evaluates a function with fixed number of arguments", async () => {
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const fn = (x, y) => ({
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c: `${x}${y}c`,
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});
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const code = createCode([ops.traverse, fn, "a", "b", "c"]);
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assert.equal(await evaluate.call(null, code), "abc");
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});
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test("if object in function position isn't a function, can unpack it", async () => {
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const fn = (...args) => args.join(",");
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const packed = new String();
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/** @type {any} */ (packed).unpack = async () => fn;
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const code = createCode([packed, "a", "b", "c"]);
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const result = await evaluate.call(null, code);
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assert.equal(result, "a,b,c");
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});
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test("by defalut sets the parent of a returned tree to the current tree", async () => {
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const fn = () => new ObjectTree({});
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const code = createCode([fn]);
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const tree = new ObjectTree({});
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const result = await evaluate.call(tree, code);
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assert.equal(result.parent, tree);
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});
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});
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/**
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* @returns {import("../../index.ts").Code}
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*/
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function createCode(array) {
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const code = array;
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/** @type {any} */ (code).location = {
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source: {
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text: "",
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},
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};
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return code;
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}
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