diff options
Diffstat (limited to 'node_modules/through/test/index.js')
-rw-r--r-- | node_modules/through/test/index.js | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/node_modules/through/test/index.js b/node_modules/through/test/index.js new file mode 100644 index 0000000..96da82f --- /dev/null +++ b/node_modules/through/test/index.js @@ -0,0 +1,133 @@ + +var test = require('tape') +var spec = require('stream-spec') +var through = require('../') + +/* + I'm using these two functions, and not streams and pipe + so there is less to break. if this test fails it must be + the implementation of _through_ +*/ + +function write(array, stream) { + array = array.slice() + function next() { + while(array.length) + if(stream.write(array.shift()) === false) + return stream.once('drain', next) + + stream.end() + } + + next() +} + +function read(stream, callback) { + var actual = [] + stream.on('data', function (data) { + actual.push(data) + }) + stream.once('end', function () { + callback(null, actual) + }) + stream.once('error', function (err) { + callback(err) + }) +} + +test('simple defaults', function(assert) { + + var l = 1000 + , expected = [] + + while(l--) expected.push(l * Math.random()) + + var t = through() + var s = spec(t).through().pausable() + + read(t, function (err, actual) { + assert.ifError(err) + assert.deepEqual(actual, expected) + assert.end() + }) + + t.on('close', s.validate) + + write(expected, t) +}); + +test('simple functions', function(assert) { + + var l = 1000 + , expected = [] + + while(l--) expected.push(l * Math.random()) + + var t = through(function (data) { + this.emit('data', data*2) + }) + var s = spec(t).through().pausable() + + + read(t, function (err, actual) { + assert.ifError(err) + assert.deepEqual(actual, expected.map(function (data) { + return data*2 + })) + assert.end() + }) + + t.on('close', s.validate) + + write(expected, t) +}) + +test('pauses', function(assert) { + + var l = 1000 + , expected = [] + + while(l--) expected.push(l) //Math.random()) + + var t = through() + + var s = spec(t) + .through() + .pausable() + + t.on('data', function () { + if(Math.random() > 0.1) return + t.pause() + process.nextTick(function () { + t.resume() + }) + }) + + read(t, function (err, actual) { + assert.ifError(err) + assert.deepEqual(actual, expected) + }) + + t.on('close', function () { + s.validate() + assert.end() + }) + + write(expected, t) +}) + +test('does not soft-end on `undefined`', function(assert) { + var stream = through() + , count = 0 + + stream.on('data', function (data) { + count++ + }) + + stream.write(undefined) + stream.write(undefined) + + assert.equal(count, 2) + + assert.end() +}) |