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var async = require('../lib');
var expect = require('chai').expect;
function filterIteratee(x, callback) {
setTimeout(function(){
callback(null, x % 2);
}, x*5);
}
function testLimit(arr, limitFunc, limit, iter, done) {
var args = [];
limitFunc(arr, limit, function(x) {
args.push(x);
iter.apply(this, arguments);
}, function() {
expect(args).to.eql(arr);
done.apply(this, arguments);
});
}
describe("filter", function () {
it('filter', function(done){
async.filter([3,1,2], filterIteratee, function(err, results){
expect(err).to.equal(null);
expect(results).to.eql([3,1]);
done();
});
});
it('filter original untouched', function(done){
var a = [3,1,2];
async.filter(a, function(x, callback){
callback(null, x % 2);
}, function(err, results){
expect(err).to.equal(null);
expect(results).to.eql([3,1]);
expect(a).to.eql([3,1,2]);
done();
});
});
it('filter collection', function(done){
var a = {a: 3, b: 1, c: 2};
async.filter(a, function(x, callback){
callback(null, x % 2);
}, function(err, results){
expect(err).to.equal(null);
expect(results).to.eql([3,1]);
expect(a).to.eql({a: 3, b: 1, c: 2});
done();
});
});
it('filter error', function(done){
async.filter([3,1,2], function(x, callback){
callback('error');
} , function(err, results){
expect(err).to.equal('error');
expect(results).to.not.exist;
done();
});
});
it('filterSeries', function(done){
async.filterSeries([3,1,2], filterIteratee, function(err, results){
expect(err).to.equal(null);
expect(results).to.eql([3,1]);
done();
});
});
it('select alias', function(){
expect(async.select).to.equal(async.filter);
});
it('selectSeries alias', function(){
expect(async.selectSeries).to.equal(async.filterSeries);
});
it('filterLimit', function(done) {
testLimit([5, 4, 3, 2, 1], async.filterLimit, 2, function(v, next) {
next(null, v % 2);
}, function(err, result){
expect(err).to.equal(null);
expect(result).to.eql([5, 3, 1]);
done();
});
});
});
describe("reject", function () {
it('reject', function(done){
async.reject([3,1,2], filterIteratee, function(err, results){
expect(err).to.equal(null);
expect(results).to.eql([2]);
done();
});
});
it('reject original untouched', function(done){
var a = [3,1,2];
async.reject(a, function(x, callback){
callback(null, x % 2);
}, function(err, results){
expect(err).to.equal(null);
expect(results).to.eql([2]);
expect(a).to.eql([3,1,2]);
done();
});
});
it('reject error', function(done){
async.reject([3,1,2], function(x, callback){
callback('error');
} , function(err, results){
expect(err).to.equal('error');
expect(results).to.not.exist;
done();
});
});
it('rejectSeries', function(done){
async.rejectSeries([3,1,2], filterIteratee, function(err, results){
expect(err).to.equal(null);
expect(results).to.eql([2]);
done();
});
});
it('rejectLimit', function(done) {
testLimit([5, 4, 3, 2, 1], async.rejectLimit, 2, function(v, next) {
next(null, v % 2);
}, function(err, result){
expect(err).to.equal(null);
expect(result).to.eql([4, 2]);
done();
});
});
});
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