/
index.js
111 lines (89 loc) · 2.11 KB
/
index.js
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var thunkify = require('..');
var assert = require('assert');
var fs = require('fs');
describe('thunkify(fn)', function(){
it('should work when sync', function(done){
function read(file, fn) {
fn(null, 'file: ' + file);
}
read = thunkify(read);
read('foo.txt')(function(err, res){
assert(!err);
assert('file: foo.txt' == res);
done();
});
})
it('should work when async', function(done){
function read(file, fn) {
setTimeout(function(){
fn(null, 'file: ' + file);
}, 5);
}
read = thunkify(read);
read('foo.txt')(function(err, res){
assert(!err);
assert('file: foo.txt' == res);
done();
});
})
it('should maintain the receiver', function(done){
function load(fn) {
fn(null, this.name);
}
var user = {
name: 'tobi',
load: thunkify(load)
};
user.load()(function(err, name){
if (err) return done(err);
assert('tobi' == name);
done();
});
})
it('should catch errors', function(done){
function load(fn) {
throw new Error('boom');
}
load = thunkify(load);
load()(function(err){
assert(err);
assert('boom' == err.message);
done();
});
})
it('should ignore multiple callbacks', function(done){
function load(fn) {
fn(null, 1);
fn(null, 2);
fn(null, 3);
}
load = thunkify(load);
load()(done);
})
it('should pass all results', function(done){
function read(file, fn) {
setTimeout(function(){
fn(null, file[0], file[1]);
}, 5);
}
read = thunkify(read);
read('foo.txt')(function(err, a, b){
assert(!err);
assert('f' == a);
assert('o' == b);
done();
});
})
it('should work with node methods', function(done){
fs.readFile = thunkify(fs.readFile);
fs.readFile('package.json')(function(err, buf){
assert(!err);
assert(Buffer.isBuffer(buf));
fs.readFile('package.json', 'utf8')(function(err, str){
assert(!err);
assert('string' == typeof str);
done();
});
});
})
})