Tons of Solutions Engineering work done today for the rest of the CS team! Headway, Howard Hanna, Engels, Brighton, etc. Also completed Datasnippers auth flow and worked on Anthology's script. Cloned Anthology's courses (900..) and will clone Full Story on Monday.

Scripts/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()
+})