def create
        if params[:cmd] == 'signup'
          email = params[:email]
          password = params[:password]
          account = Account.create_account(email,password)
          respond_to do |format|
            format.json { render json: account.to_json}
          end
     end

fixtures :accounts
  test "should get index" do
    get :index, :format => "json"
    assert_response :success
    assert_not_nil assigns(:accounts)
  end
  test "should create account" do
    params = {
      cmd: 'signup', email: 'testing@gmail.com', password: '123456',
      username: 'some username', email_confirmed: false, confirm_token: 1,       session_id: 1
    }
    assert_difference('Account.count') do
      post :create, account: params, :format => "json"
      assigns(account: params)
    end
  end
end

one:
  email: testing1@gmail.com
  password_digest: 123456
  username: null
  email_confirmed: false
  confirm_token: null
  session_id: null

two:
  email: testing2@gmail.com
  password_digest: 123456
  username: null
  email_confirmed: false
  confirm_token: null
  session_id: null

def self.create_account(email,password)
    account = Account.find_by(email: email)
    if !account.nil?
      if account.email_confirmed
        return 'error: account in used'
      elsif !account.email_confirmed
        return 'error: not activated'
      end
    elsif account.nil?
      account = Account.new(password:password,email:email)
      account.confirm_token = account.id * rand(999)
      account.save
  end
end