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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');
}