quickjs/examples/test_point.js

/* example of JS module importing a C module */
import { Point } from "./point.so";
import { PointEnumerable } from "./point.so";

function assert(b, str)
{
    if (b) {
        return;
    } else {
        throw Error("assertion failed: " + str);
    }
}

class ColorPoint extends Point {
    constructor(x, y, color) {
        super(x, y);
        this.color = color;
    }
    get_color() {
        return this.color;
    }
};

function main()
{
    var pt, pt2, pt3;

    pt = new Point(2, 3);
    assert(pt.x === 2);
    assert(pt.y === 3);
    pt.x = 4;
    assert(pt.x === 4);
    assert(pt.norm() == 5);

    pt2 = new ColorPoint(2, 3, 0xffffff);
    assert(pt2.x === 2);
    assert(pt2.color === 0xffffff);
    assert(pt2.get_color() === 0xffffff);

    pt3 = new PointEnumerable(2, 3);
    assert(JSON.stringify(pt) === "{}");
    assert(JSON.stringify(pt3) === "{\"x\":2,\"y\":3}");
}

main();