adding new test for ActiveModel::Serialization

Signed-off-by: José Valim <jose.valim@gmail.com>

Author: Neeraj Singh

activemodel/test/cases/serialization_test.rb

@@ -0,0 +1,45 @@
+require "cases/helper"
+
+class SerializationTest < ActiveModel::TestCase
+  class User
+    include ActiveModel::Serialization
+
+    attr_accessor :name, :email, :gender
+
+    def attributes
+      @attributes ||= {'name' => 'nil', 'email' => 'nil', 'gender' => 'nil'}
+    end
+
+    def foo
+      'i_am_foo'
+    end
+  end
+
+  setup do
+    @user = User.new
+    @user.name = 'David'
+    @user.email = 'david@example.com'
+    @user.gender = 'male'
+  end
+
+  def test_method_serializable_hash_should_work
+    expected =  {"name"=>"David", "gender"=>"male", "email"=>"david@example.com"}
+    assert_equal expected , @user.serializable_hash
+  end
+
+  def test_method_serializable_hash_should_work_with_only_option
+    expected =  {"name"=>"David"}
+    assert_equal expected , @user.serializable_hash(:only => [:name])
+  end
+
+  def test_method_serializable_hash_should_work_with_except_option
+    expected =  {"gender"=>"male", "email"=>"david@example.com"}
+    assert_equal expected , @user.serializable_hash(:except => [:name])
+  end
+
+  def test_method_serializable_hash_should_work_with_methods_option
+    expected =  {"name"=>"David", "gender"=>"male", :foo=>"i_am_foo", "email"=>"david@example.com"}
+    assert_equal expected , @user.serializable_hash(:methods => [:foo])
+  end
+
+end