27 lines
519 B
JavaScript
27 lines
519 B
JavaScript
|
var assert = require('assert');
|
||
|
|
var Lazy = require('..');
|
||
|
|
var expresso = expresso;
|
||
|
|
|
||
|
|
function range(i, j) {
|
||
|
|
var r = [];
|
||
|
|
for (;i<j;i++) r.push(i);
|
||
|
|
return r;
|
||
|
|
}
|
||
|
|
|
||
|
|
exports['product'] = function () {
|
||
|
|
var lazy = new Lazy;
|
||
|
|
var executed = 0;
|
||
|
|
lazy.product(function (y) {
|
||
|
|
executed++;
|
||
|
|
assert.equal(y, 1*2*3*4*5*6*7*8*9);
|
||
|
|
})
|
||
|
|
|
||
|
|
range(1,10).forEach(function (x) {
|
||
|
|
lazy.emit('data', x);
|
||
|
|
});
|
||
|
|
lazy.emit('end');
|
||
|
|
|
||
|
|
assert.equal(executed, 1, 'product failed to execute');
|
||
|
|
}
|
||
|
|
|