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build/node_modules/mute-stream/test/basic.js

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+var Stream = require('stream')
+var tap = require('tap')
+var MS = require('../mute.js')
+
+// some marker objects
+var END = {}
+var PAUSE = {}
+var RESUME = {}
+
+function PassThrough () {
+  Stream.call(this)
+  this.readable = this.writable = true
+}
+
+PassThrough.prototype = Object.create(Stream.prototype, {
+  constructor: {
+    value: PassThrough
+  },
+  write: {
+    value: function (c) {
+      this.emit('data', c)
+      return true
+    }
+  },
+  end: {
+    value: function (c) {
+      if (c) this.write(c)
+      this.emit('end')
+    }
+  },
+  pause: {
+    value: function () {
+      this.emit('pause')
+    }
+  },
+  resume: {
+    value: function () {
+      this.emit('resume')
+    }
+  }
+})
+
+tap.test('incoming', function (t) {
+  var ms = new MS
+  var str = new PassThrough
+  str.pipe(ms)
+
+  var expect = ['foo', 'boo', END]
+  ms.on('data', function (c) {
+    t.equal(c, expect.shift())
+  })
+  ms.on('end', function () {
+    t.equal(END, expect.shift())
+    t.end()
+  })
+  str.write('foo')
+  ms.mute()
+  str.write('bar')
+  ms.unmute()
+  str.write('boo')
+  ms.mute()
+  str.write('blaz')
+  str.end('grelb')
+})
+
+tap.test('outgoing', function (t) {
+  var ms = new MS
+  var str = new PassThrough
+  ms.pipe(str)
+
+  var expect = ['foo', 'boo', END]
+  str.on('data', function (c) {
+    t.equal(c, expect.shift())
+  })
+  str.on('end', function () {
+    t.equal(END, expect.shift())
+    t.end()
+  })
+
+  ms.write('foo')
+  ms.mute()
+  ms.write('bar')
+  ms.unmute()
+  ms.write('boo')
+  ms.mute()
+  ms.write('blaz')
+  ms.end('grelb')
+})
+
+tap.test('isTTY', function (t) {
+  var str = new PassThrough
+  str.isTTY = true
+  str.columns=80
+  str.rows=24
+
+  var ms = new MS
+  t.equal(ms.isTTY, false)
+  t.equal(ms.columns, undefined)
+  t.equal(ms.rows, undefined)
+  ms.pipe(str)
+  t.equal(ms.isTTY, true)
+  t.equal(ms.columns, 80)
+  t.equal(ms.rows, 24)
+  str.isTTY = false
+  t.equal(ms.isTTY, false)
+  t.equal(ms.columns, 80)
+  t.equal(ms.rows, 24)
+  str.isTTY = true
+  t.equal(ms.isTTY, true)
+  t.equal(ms.columns, 80)
+  t.equal(ms.rows, 24)
+  ms.isTTY = false
+  t.equal(ms.isTTY, false)
+  t.equal(ms.columns, 80)
+  t.equal(ms.rows, 24)
+
+  ms = new MS
+  t.equal(ms.isTTY, false)
+  str.pipe(ms)
+  t.equal(ms.isTTY, true)
+  str.isTTY = false
+  t.equal(ms.isTTY, false)
+  str.isTTY = true
+  t.equal(ms.isTTY, true)
+  ms.isTTY = false
+  t.equal(ms.isTTY, false)
+
+  t.end()
+})
+
+tap.test('pause/resume incoming', function (t) {
+  var str = new PassThrough
+  var ms = new MS
+  str.on('pause', function () {
+    t.equal(PAUSE, expect.shift())
+  })
+  str.on('resume', function () {
+    t.equal(RESUME, expect.shift())
+  })
+  var expect = [PAUSE, RESUME, PAUSE, RESUME]
+  str.pipe(ms)
+  ms.pause()
+  ms.resume()
+  ms.pause()
+  ms.resume()
+  t.equal(expect.length, 0, 'saw all events')
+  t.end()
+})
+
+tap.test('replace with *', function (t) {
+  var str = new PassThrough
+  var ms = new MS({replace: '*'})
+  str.pipe(ms)
+  var expect = ['foo', '*****', 'bar', '***', 'baz', 'boo', '**', '****']
+
+  ms.on('data', function (c) {
+    t.equal(c, expect.shift())
+  })
+
+  str.write('foo')
+  ms.mute()
+  str.write('12345')
+  ms.unmute()
+  str.write('bar')
+  ms.mute()
+  str.write('baz')
+  ms.unmute()
+  str.write('baz')
+  str.write('boo')
+  ms.mute()
+  str.write('xy')
+  str.write('xyzΩ')
+
+  t.equal(expect.length, 0)
+  t.end()
+})
+
+tap.test('replace with ~YARG~', function (t) {
+  var str = new PassThrough
+  var ms = new MS({replace: '~YARG~'})
+  str.pipe(ms)
+  var expect = ['foo', '~YARG~~YARG~~YARG~~YARG~~YARG~', 'bar',
+                '~YARG~~YARG~~YARG~', 'baz', 'boo', '~YARG~~YARG~',
+                '~YARG~~YARG~~YARG~~YARG~']
+
+  ms.on('data', function (c) {
+    t.equal(c, expect.shift())
+  })
+
+  // also throw some unicode in there, just for good measure.
+  str.write('foo')
+  ms.mute()
+  str.write('ΩΩ')
+  ms.unmute()
+  str.write('bar')
+  ms.mute()
+  str.write('Ω')
+  ms.unmute()
+  str.write('baz')
+  str.write('boo')
+  ms.mute()
+  str.write('Ω')
+  str.write('ΩΩ')
+
+  t.equal(expect.length, 0)
+  t.end()
+})