111 lines
2.1 KiB
JavaScript
111 lines
2.1 KiB
JavaScript
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var thunkify = require('..');
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var assert = require('assert');
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var fs = require('fs');
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describe('thunkify(fn)', function(){
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it('should work when sync', function(done){
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function read(file, fn) {
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fn(null, 'file: ' + file);
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}
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read = thunkify(read);
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read('foo.txt')(function(err, res){
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assert(!err);
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assert('file: foo.txt' == res);
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done();
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});
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})
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it('should work when async', function(done){
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function read(file, fn) {
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setTimeout(function(){
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fn(null, 'file: ' + file);
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}, 5);
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}
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read = thunkify(read);
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read('foo.txt')(function(err, res){
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assert(!err);
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assert('file: foo.txt' == res);
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done();
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});
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})
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it('should maintain the receiver', function(done){
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function load(fn) {
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fn(null, this.name);
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}
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var user = {
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name: 'tobi',
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load: thunkify(load)
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};
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user.load()(function(err, name){
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if (err) return done(err);
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assert('tobi' == name);
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done();
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});
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})
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it('should catch errors', function(done){
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function load(fn) {
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throw new Error('boom');
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}
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load = thunkify(load);
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load()(function(err){
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assert(err);
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assert('boom' == err.message);
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done();
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});
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})
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it('should ignore multiple callbacks', function(done){
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function load(fn) {
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fn(null, 1);
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fn(null, 2);
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fn(null, 3);
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}
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load = thunkify(load);
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load()(done);
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})
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it('should pass all results', function(done){
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function read(file, fn) {
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setTimeout(function(){
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fn(null, file[0], file[1]);
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}, 5);
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}
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read = thunkify(read);
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read('foo.txt')(function(err, a, b){
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assert(!err);
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assert('f' == a);
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assert('o' == b);
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done();
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});
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})
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it('should work with node methods', function(done){
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fs.readFile = thunkify(fs.readFile);
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fs.readFile('package.json')(function(err, buf){
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assert(!err);
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assert(Buffer.isBuffer(buf));
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fs.readFile('package.json', 'utf8')(function(err, str){
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assert(!err);
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assert('string' == typeof str);
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done();
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});
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});
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})
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})
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