From 4c21d2d154a4775e3f706426acc4625f7db0a53a Mon Sep 17 00:00:00 2001
From: Feross Aboukhadijeh <feross@feross.org>
Date: Mon, 28 Mar 2016 17:56:02 -0700
Subject: Deprecate bittorrent-swarm, inline into webtorrent
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bittorrent-swarm and the Torrent object in webtorrent are very coupled.
It doesn't make much sense to publish them separately, as
bittorrent-swarm can't be used independently.
---
 test/node/swarm-basic.js     | 77 +++++++++++++++++++++++++++++++++++++++++
 test/node/swarm-reconnect.js | 62 +++++++++++++++++++++++++++++++++
 test/node/swarm-timeout.js   | 50 +++++++++++++++++++++++++++
 test/swarm.js                | 82 ++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 271 insertions(+)
 create mode 100644 test/node/swarm-basic.js
 create mode 100644 test/node/swarm-reconnect.js
 create mode 100644 test/node/swarm-timeout.js
 create mode 100644 test/swarm.js

(limited to 'test')

diff --git a/test/node/swarm-basic.js b/test/node/swarm-basic.js
new file mode 100644
index 0000000..9e38d0a
--- /dev/null
+++ b/test/node/swarm-basic.js
@@ -0,0 +1,77 @@
+var hat = require('hat')
+var portfinder = require('portfinder')
+var Swarm = require('../../lib/swarm')
+var test = require('tape')
+
+var infoHash = 'd2474e86c95b19b8bcfdb92bc12c9d44667cfa36'
+var infoHash2 = 'd2474e86c95b19b8bcfdb92bc12c9d44667cfa37'
+var peerId = new Buffer('-WW0001-' + hat(48), 'utf8').toString('hex')
+var peerId2 = new Buffer('-WW0001-' + hat(48), 'utf8').toString('hex')
+
+test('swarm listen (explicit port)', function (t) {
+  t.plan(1)
+
+  var swarm = new Swarm(infoHash, peerId)
+  portfinder.getPort(function (err, port) {
+    if (err) throw err
+    swarm.listen(port)
+    swarm.on('listening', function () {
+      t.equal(port, swarm.address().port)
+      swarm.destroy()
+    })
+  })
+})
+
+test('two swarms listen on same port (explicit)', function (t) {
+  t.plan(2)
+
+  var swarm1 = new Swarm(infoHash, peerId)
+  portfinder.getPort(function (err, port) {
+    if (err) throw err
+    swarm1.listen(port, function () {
+      t.equal(swarm1.address().port, port, 'listened on requested port')
+
+      var swarm2 = new Swarm(infoHash2, peerId)
+      swarm2.listen(port, function () {
+        t.equal(swarm2.address().port, port, 'listened on requested port')
+        swarm1.destroy()
+        swarm2.destroy()
+      })
+    })
+  })
+})
+
+test('swarm join', function (t) {
+  t.plan(10)
+
+  var swarm1 = new Swarm(infoHash, peerId)
+  swarm1.listen(0, function () {
+    var swarm2 = new Swarm(infoHash, peerId2)
+
+    t.equal(swarm1.wires.length, 0)
+    t.equal(swarm2.wires.length, 0)
+
+    swarm2.addPeer('127.0.0.1:' + swarm1.address().port)
+
+    swarm1.on('wire', function (wire, addr) {
+      t.ok(wire, 'Peer join our swarm via listening port')
+
+      t.equal(swarm1.wires.length, 1)
+      t.ok(/127\.0\.0\.1:\d{1,5}/.test(addr))
+      t.equal(wire.peerId.toString('hex'), peerId2)
+    })
+
+    swarm2.on('wire', function (wire, addr) {
+      t.ok(wire, 'Joined swarm, got wire')
+
+      t.equal(swarm2.wires.length, 1)
+      t.ok(/127\.0\.0\.1:\d{1,5}/.test(addr))
+      t.equal(wire.peerId.toString('hex'), peerId)
+    })
+
+    t.on('end', function () {
+      swarm1.destroy()
+      swarm2.destroy()
+    })
+  })
+})
diff --git a/test/node/swarm-reconnect.js b/test/node/swarm-reconnect.js
new file mode 100644
index 0000000..4fad7d0
--- /dev/null
+++ b/test/node/swarm-reconnect.js
@@ -0,0 +1,62 @@
+var hat = require('hat')
+var Swarm = require('../../lib/swarm')
+var test = require('tape')
+
+var infoHash = 'd2474e86c95b19b8bcfdb92bc12c9d44667cfa36'
+var peerId1 = new Buffer('-WW0001-' + hat(48), 'utf8').toString('hex')
+var peerId2 = new Buffer('-WW0001-' + hat(48), 'utf8').toString('hex')
+
+test('reconnect when peer disconnects', function (t) {
+  t.plan(10)
+
+  var swarm1 = new Swarm(infoHash, peerId1)
+  swarm1.listen(0, function () {
+    var swarm2 = new Swarm(infoHash, peerId2)
+
+    var time1 = 0
+    swarm1.on('wire', function (wire) {
+      if (time1 === 0) {
+        t.ok(wire, 'Peer joined via listening port')
+        t.equal(swarm1.wires.length, 1)
+
+        // at some point in future, end wire
+        setTimeout(function () {
+          wire.destroy()
+        }, 100)
+
+        // ...and prevent reconnect
+        swarm1._drain = function () {}
+      } else if (time1 === 1) {
+        t.ok(wire, 'Remote peer reconnected')
+        t.equal(swarm1.wires.length, 1)
+      } else {
+        throw new Error('too many wire events (1)')
+      }
+      time1 += 1
+    })
+
+    var time2 = 0
+    swarm2.on('wire', function (wire) {
+      if (time2 === 0) {
+        t.ok(wire, 'Joined swarm, got wire')
+        t.equal(swarm2.wires.length, 1)
+
+        wire.on('end', function () {
+          t.pass('Wire ended by remote peer')
+          t.equal(swarm1.wires.length, 0)
+        })
+      } else if (time2 === 1) {
+        t.ok(wire, 'Reconnected to remote peer')
+        t.equal(swarm2.wires.length, 1)
+
+        swarm1.destroy()
+        swarm2.destroy()
+      } else {
+        throw new Error('too many wire events (2)')
+      }
+      time2 += 1
+    })
+
+    swarm2.addPeer('127.0.0.1:' + swarm1.address().port)
+  })
+})
diff --git a/test/node/swarm-timeout.js b/test/node/swarm-timeout.js
new file mode 100644
index 0000000..4341465
--- /dev/null
+++ b/test/node/swarm-timeout.js
@@ -0,0 +1,50 @@
+var hat = require('hat')
+var Swarm = require('../../lib/swarm')
+var test = require('tape')
+
+var infoHash = 'd2474e86c95b19b8bcfdb92bc12c9d44667cfa36'
+var peerId1 = new Buffer('-WW0001-' + hat(48), 'utf8').toString('hex')
+var peerId2 = new Buffer('-WW0001-' + hat(48), 'utf8').toString('hex')
+
+test('timeout if no handshake in 25 seconds', function (t) {
+  t.plan(4)
+
+  var swarm1 = new Swarm(infoHash, peerId1)
+
+  var _addIncomingPeer = swarm1._addIncomingPeer
+  swarm1._addIncomingPeer = function (peer) {
+    // Nuke the handshake function on swarm1's peer to test swarm2's
+    // handshake timeout code
+    peer.wire.handshake = function () {}
+    _addIncomingPeer.call(swarm1, peer)
+  }
+
+  swarm1.listen(0, function () {
+    var swarm2 = new Swarm(infoHash, peerId2)
+
+    var numWires = 0
+    swarm1.on('wire', function (wire) {
+      numWires += 1
+      if (numWires === 1) {
+        t.ok(wire, 'Got wire via listening port')
+        t.equal(swarm1.wires.length, 1)
+
+        // swarm2 should never get a wire since swarm1 refuses to send it a
+        // handshake
+        t.equal(swarm2.wires.length, 0)
+      } else if (numWires === 2) {
+        t.pass('swarm2 reconnected after timeout')
+        swarm1.destroy()
+        swarm2.destroy()
+      } else {
+        t.fail('got wire after destroy')
+      }
+    })
+
+    swarm2.on('wire', function (wire) {
+      t.fail('Should not get a wire because peer did not handshake')
+    })
+
+    swarm2.addPeer('127.0.0.1:' + swarm1.address().port)
+  })
+})
diff --git a/test/swarm.js b/test/swarm.js
new file mode 100644
index 0000000..9662d4d
--- /dev/null
+++ b/test/swarm.js
@@ -0,0 +1,82 @@
+var hat = require('hat')
+var Swarm = require('../lib/swarm')
+var test = require('tape')
+
+var infoHash = 'd2474e86c95b19b8bcfdb92bc12c9d44667cfa36'
+var infoHash2 = 'd2474e86c95b19b8bcfdb92bc12c9d44667cfa37'
+var peerId = new Buffer('-WW0001-' + hat(48), 'utf8').toString('hex')
+var peerId2 = new Buffer('-WW0001-' + hat(48), 'utf8').toString('hex')
+
+test('create swarm, check invariants', function (t) {
+  var swarm = new Swarm(infoHash, peerId)
+
+  t.equal(swarm.infoHash.toString('hex'), infoHash)
+  t.equal(swarm.peerId.toString('hex'), peerId)
+  t.equal(swarm.downloaded, 0)
+  t.equal(swarm.uploaded, 0)
+  t.ok(Array.isArray(swarm.wires))
+  t.equal(swarm.wires.length, 0)
+  t.end()
+})
+
+test('swarm listen(0) selects free port', function (t) {
+  t.plan(2)
+
+  var swarm = new Swarm(infoHash, peerId)
+  swarm.listen(0)
+  swarm.on('listening', function () {
+    var port = swarm.address().port
+    t.equal(typeof port, 'number', 'port is a number')
+    if (process.browser) {
+      t.equal(port, 0, 'port number is 0')
+    } else {
+      t.ok(port > 0 && port < 65535, 'valid port number')
+    }
+    swarm.destroy()
+  })
+})
+
+test('two swarms listen on same port (implicit)', function (t) {
+  t.plan(5)
+
+  // When no port is specified and listen is called twice, they should get assigned the same port.
+
+  var swarm1 = new Swarm(infoHash, peerId)
+  var swarm2 = new Swarm(infoHash2, peerId2)
+
+  var swarm1Port
+  var swarm2Port
+
+  function maybeDone () {
+    if (swarm1.listening && swarm2.listening) {
+      t.equal(swarm1Port, swarm2Port, 'swarms were given same port')
+
+      t.equal(typeof swarm1Port, 'number', 'port is a number')
+      if (process.browser) {
+        t.equal(swarm1Port, 0, 'port number is 0')
+      } else {
+        t.ok(swarm1Port > 0 && swarm1Port < 65535, 'valid port number')
+      }
+
+      t.equal(typeof swarm2Port, 'number', 'port is a number')
+      if (process.browser) {
+        t.equal(swarm2Port, 0, 'port number is 0')
+      } else {
+        t.ok(swarm2Port > 0 && swarm2Port < 65535, 'valid port number')
+      }
+
+      swarm1.destroy()
+      swarm2.destroy()
+    }
+  }
+
+  swarm1.listen(0, function () {
+    swarm1Port = swarm1.address().port
+    maybeDone()
+  })
+
+  swarm2.listen(0, function (port2) {
+    swarm2Port = swarm2.address().port
+    maybeDone()
+  })
+})
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