moved association specs to own file

spec/associations.has-many.spec.js

+var config    = require("./config/config")
+  , Sequelize = require("../index")
+  , sequelize = new Sequelize(config.database, config.username, config.password, { logging: false })
+  , Helpers   = new (require("./config/helpers"))(sequelize)
+
+describe('HasMany', function() {
+  beforeEach(function() { Helpers.sync() })
+  afterEach(function() { Helpers.drop() })
+
+  var User  = sequelize.define('User' + Math.random(), { name: Sequelize.STRING })
+    , Task  = sequelize.define('Task' + Math.random(), { name: Sequelize.STRING })
+    , users = null
+    , tasks = null
+
+  User.hasMany(Task, {as:'Tasks'})
+  Task.hasMany(User, {as:'Users'})
+
+  beforeEach(function() {
+    Helpers.async(function(_done) {
+      Helpers.Factories.Model(User.name, {name: 'User' + Math.random()}, function(_users) {
+        users = _users; _done()
+      }, 5)
+    })
+    Helpers.async(function(_done) {
+      Helpers.Factories.Model(Task.name, {name: 'Task' + Math.random()}, function(_tasks) {
+        tasks = _tasks; _done()
+      }, 2)
+    })
+  })
+
+  describe('addModel / getModel', function() {
+    var user = null
+      , task = null
+
+    beforeEach(function() {
+      Helpers.async(function(done) {
+        User.all().on('success', function(_users) {
+          Task.all().on('success', function(_tasks) {
+            user = _users[0]
+            task = _tasks[0]
+
+            done()
+          })
+        })
+      })
+    })
+
+    it('should correctly add an association to the model', function() {
+      Helpers.async(function(done) {
+        user.getTasks().on('success', function(_tasks) {
+          expect(_tasks.length).toEqual(0)
+          user.addTask(task).on('success', function() {
+            user.getTasks().on('success', function(_tasks) {
+              expect(_tasks.length).toEqual(1)
+              done()
+            })
+          })
+        })
+      })
+    })
+  })
+
+  describe('removeModel', function() {
+    var user  = null
+      , tasks = null
+
+    beforeEach(function() {
+      Helpers.async(function(done) {
+        User.all().on('success', function(users) {
+          Task.all().on('success', function(_tasks) {
+            user = users[0]
+            tasks = _tasks
+
+            done()
+          })
+        })
+      })
+    })
+
+    it("should correctly remove associated objects", function() {
+      Helpers.async(function(done) {
+        user.getTasks().on('success', function(__tasks) {
+          expect(__tasks.length).toEqual(0)
+          user.setTasks(tasks).on('success', function() {
+            user.getTasks().on('success', function(_tasks) {
+              expect(_tasks.length).toEqual(tasks.length)
+              user.removeTask(tasks[0]).on('success', function() {
+                user.getTasks().on('success', function(_tasks) {
+                  expect(_tasks.length).toEqual(tasks.length - 1)
+                  done()
+                })
+              })
+            })
+          })
+        })
+      })
+    })
+  })
+})