aaac7fed
 liuqimichale
add
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var test = require('tape')
var path = require('path')
var from = require('./')
var fs = require('fs')
var tmp = path.resolve(
__dirname, 'tmp.txt'
)
function fromString(string) {
return from(function(size, next) {
if (string.length <= 0) return next(null, null)
var chunk = string.slice(0, size)
string = string.slice(size)
next(null, chunk)
})
}
test('from2', function(t) {
var contents = fs.readFileSync(__filename, 'utf8')
var stream = fromString(contents)
stream
.pipe(fs.createWriteStream(tmp))
.on('close', function() {
t.equal(fs.readFileSync(tmp, 'utf8'), contents)
fs.unlinkSync(tmp)
t.end()
})
})
test('old mode', function(t) {
var contents = fs.readFileSync(__filename, 'utf8')
var stream = fromString(contents)
var buffer = ''
stream.on('data', function(data) {
buffer += data
}).on('end', function() {
t.equal(buffer, contents)
t.end()
})
})
test('destroy', function(t) {
var stream = from(function(size, next) {
process.nextTick(function() {
next(null, 'no')
})
})
stream.on('data', function(data) {
t.ok(false)
}).on('close', function() {
t.ok(true)
t.end()
})
stream.destroy()
})
test('arrays', function (t) {
var input = ['a', 'b', 'c']
var stream = from(input)
var output = []
stream.on('data', function (letter) {
output.push(letter.toString())
})
stream.on('end', function () {
t.deepEqual(input, output)
t.end()
})
})
test('obj arrays', function (t) {
var input = [{foo:'a'}, {foo:'b'}, {foo:'c'}]
var stream = from.obj(input)
var output = []
stream.on('data', function (letter) {
output.push(letter)
})
stream.on('end', function () {
t.deepEqual(input, output)
t.end()
})
})
test('arrays can emit errors', function (t) {
var input = ['a', 'b', new Error('ooops'), 'c']
var stream = from(input)
var output = []
stream.on('data', function (letter) {
output.push(letter.toString())
})
stream.on('error', function(e){
t.deepEqual(['a', 'b'], output)
t.equal('ooops', e.message)
t.end()
})
stream.on('end', function () {
t.fail('the stream should have errored')
})
})
test('obj arrays can emit errors', function (t) {
var input = [{foo:'a'}, {foo:'b'}, new Error('ooops'), {foo:'c'}]
var stream = from.obj(input)
var output = []
stream.on('data', function (letter) {
output.push(letter)
})
stream.on('error', function(e){
t.deepEqual([{foo:'a'}, {foo:'b'}], output)
t.equal('ooops', e.message)
t.end()
})
stream.on('end', function () {
t.fail('the stream should have errored')
})
})
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