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30 lines
569 B
JavaScript
30 lines
569 B
JavaScript
var assert = require('assert');
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var Lazy = require('..');
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var expresso = expresso;
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function range(i, j) {
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var r = [];
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for (;i<j;i++) r.push(i);
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return r;
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}
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exports['map'] = function () {
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var lazy = new Lazy;
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var executed = false;
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var data = [];
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lazy
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.map(function (x) {
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return 2*x;
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})
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.forEach(function (x) {
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data.push(x);
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});
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range(0,10).forEach(function (x) {
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lazy.emit('data', x);
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});
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assert.deepEqual(data, range(0,10).map(function (x) { return x*2 }));
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}
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