🐛 Update: Added support for the 'find' command in settings.local.json. Enhanced logging for various modules, including initialization and performance metrics. Improved SQLite database optimization and ensured better tracking of user interactions and system processes. 📚

network-visualization/node_modules/from/test/index.js

@@ -0,0 +1,210 @@
+var from = require('..')
+var spec = require('stream-spec')
+var a = require('assertions')
+
+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)
+  })
+}
+
+function pause(stream) {
+  stream.on('data', function () {
+    if(Math.random() > 0.1) return
+    stream.pause()
+    process.nextTick(function () {
+      stream.resume()
+    })
+  })
+}
+
+exports['inc'] = function (test) {
+
+  var fs = from(function (i) {
+    this.emit('data', i)
+    if(i >= 99)
+      return this.emit('end')
+    return true
+  })
+
+  spec(fs).readable().validateOnExit() 
+
+  read(fs, function (err, arr) {
+    test.equal(arr.length, 100)
+    test.done()
+  })
+}
+
+exports['inc - async'] = function (test) {
+
+  var fs = from(function (i, next) {
+    this.emit('data', i)
+    if(i >= 99)
+      return this.emit('end')
+		next();
+  })
+
+  spec(fs).readable().validateOnExit() 
+
+  read(fs, function (err, arr) {
+    test.equal(arr.length, 100)
+    test.done()
+  })
+}
+
+exports['large stream - from an array'] = function (test) {
+
+  var l = 100000
+    , expected = [] 
+
+  while(l--) expected.push(l * Math.random())
+
+  var fs = from(expected.slice())
+
+  spec(fs).readable().validateOnExit() 
+
+  read(fs, function (err, arr) {
+		a.deepEqual(arr, expected)
+    test.done()
+  })
+}
+
+exports['large stream - callback return true'] = function (test) {
+
+  var fs = from(function (i, next) {
+    this.emit('data', i)
+    if(i >= 99999)
+      return this.emit('end')
+		return true;
+  })
+
+  spec(fs).readable().validateOnExit() 
+
+  read(fs, function (err, arr) {
+    test.equal(arr.length, 100000)
+    test.done()
+  })
+}
+
+exports['large stream - callback call next()'] = function (test) {
+
+  var fs = from(function (i, next) {
+    this.emit('data', i)
+    if(i >= 99999)
+      return this.emit('end')
+		next();
+  })
+
+  spec(fs).readable().validateOnExit() 
+
+  read(fs, function (err, arr) {
+    test.equal(arr.length, 100000)
+    test.done()
+  })
+}
+
+exports['simple'] = function (test) {
+
+  var l = 1000
+    , expected = [] 
+
+  while(l--) expected.push(l * Math.random())
+
+  var t = from(expected.slice())
+
+  spec(t)
+    .readable()
+    .pausable({strict: true})
+    .validateOnExit()
+
+  read(t, function (err, actual) {
+    if(err) test.error(err) //fail
+    a.deepEqual(actual, expected)
+    test.done()
+  })
+
+}
+
+exports['simple pausable'] = function (test) {
+
+  var l = 1000
+    , expected = [] 
+
+  while(l--) expected.push(l * Math.random())
+
+  var t = from(expected.slice())
+
+  spec(t)
+    .readable()
+    .pausable({strict: true})
+    .validateOnExit()
+
+  pause(t)
+
+  read(t, function (err, actual) {
+    if(err) test.error(err) //fail
+    a.deepEqual(actual, expected)
+    test.done()
+  })
+
+}
+
+exports['simple (not strictly pausable) setTimeout'] = function (test) {
+
+  var l = 10
+    , expected = [] 
+  while(l--) expected.push(l * Math.random())
+
+
+  var _expected = expected.slice()
+  var t = from(function (i, n) {
+    var self = this
+    setTimeout(function () {
+      if(_expected.length)
+        self.emit('data', _expected.shift())
+      else
+        if(!self.ended)
+          self.emit('end')
+      n()
+    }, 3)
+  })
+
+  /*
+    using from in this way will not be strictly pausable.
+    it could be extended to buffer outputs, but I think a better
+    way would be to use a PauseStream that implements strict pause.
+  */
+
+  spec(t)
+    .readable()
+    .pausable({strict: false })
+    .validateOnExit()
+
+  //pause(t)
+  var paused = false
+  var i = setInterval(function () {
+    if(!paused) t.pause()
+    else t.resume()
+    paused = !paused
+  }, 2)
+
+  t.on('end', function () {
+    clearInterval(i)
+  })
+
+  read(t, function (err, actual) {
+    if(err) test.error(err) //fail
+    a.deepEqual(actual, expected)
+    test.done()
+  })
+
+}
+
+