battleship-search/test/2d.js

maximize an n-dimensional landscape using the battleship search algorithm

var search = require('../');
var test = require('tape');

test('2d', function (t) {
    t.plan(4);
    
    var q = search([ [ 0, 5 ], [ 0, 5 ] ], function (pt) {
        var x = pt[0], y = pt[1];
        return Math.sin(5 * x) - Math.cos(x)
            + Math.sin(3 * y) - 1 / 5 * Math.cos(x * y + 3 * y)
            + 1/4 * Math.sin(x - 1) - 2 * Math.cos(x)
        ;
    });
    
    var count = 0;
    q.on('test', function (pt, x) {
        console.log('TEST', pt, x);
        count ++;
    });
    
    var max = Number.MIN_VALUE;
    q.on('max', function (pt, x) {
        console.log('MAX', pt, x);
        t.ok(x > max);
        max = x;
    });
    
    for (var i = 0; i < 20; i++) q.next();
    t.equal(count, 20);
    t.ok(max > 3.47);
});