I am stocked with rails

This is the error message. expected #has_content?("error") to return true, got false

require 'spec_helper'

describe "User pages" do subject { page }

describe "index" do

let(:user) { FactoryGirl.create(:user) }

before do
  sign_in user
  visit users_path
  #sign_in FactoryGirl.create(:user)
  #FactoryGirl.create(:user, name: "Bob", email: "bob@example.com")
  #FactoryGirl.create(:user, name: "Ben", email: "ben@example.com")
  #visit users_path
end

it { should have_title('All users') }
it { should have_content('All users') }

describe "pagination" do

  before(:all) { 30.times { FactoryGirl.create(:user) } }
  after(:all)  { User.delete_all }

  it { should have_selector('div.pagination') }

  it "should list each user" do
    User.paginate(page: 1).each do |user|
      expect(page).to have_selector('li', text: user.name)
    end
  end  
end
describe "delete links" do
  it { should_not have_link('delete') }

  describe "as an admin user" do
    let(:admin) { FactoryGirl.create(:admin) }
    before do
      sign_in admin 
      visit users_path
    end

      it { should have_link('delete', href: user_path(User.first)) }
      it "should be able to delete another user" do
        expect do 
          click_link('delete', match: :first)
        end.to change(User, :count).by(-1)
      end
      it {should_not have_link('delete', href: user_path(admin)) }
  end
end

end

    describe "profile page" do
        let(:user) { FactoryGirl.create(:user) }
        before { visit user_path(user)}
      it { should have_content(user.name) }
      it { should have_title(user.name) }
    end
    describe "signup page" do
      before { visit signup_path }
        it { should have_content('Sign up') }
        it { should have_title(full_title('Sign up')) }
    end

describe "signup" do before { visit signup_path } let(:submit) { "Create my account" }

    describe "with invalid information" do
       it "should not create a user" do
         expect { click_button submit }.not_to change(User, :count)
       end

      describe "after submissinon" do
            before { click_button submit }
        it { should have_title('Sign up') }
        it { should have_content('error') }
      end
    end

describe "with valid information" do
    before do
        fill_in "Name", with: "Example User"
        fill_in "Email", with: "user@example.com"
        fill_in "Password", with: "foobar"
        fill_in "Confirmation", with: "foobar"
    end
    it "should create a user" do
      expect { click_button submit }.to change(User, :count).by(1)
    end
  describe "after saving the user" do
      before { click_button submit }
      let(:user) { User.find_by(email: 'user@example.com') }
      it { should have_link('Sign out')}
      it { should have_title(user.name) }
      it { should have_selector('div.alert.alert-success', text: 'Welcome') }
  end
end

end

describe "edit" do let(:user) { FactoryGirl.create(:user) } before do sign_in user visit edit_user_path(user) end

describe "page" do
  it { should have_content("Update your profile") }
  it { should have_title("Edit user") }
  it { should have_link('change', href: 'http://ift.tt/1d640G7') }
end

describe "with invalid information" do
  before { click_button "Save changes" }

  it { should have_content('error') }
end

describe "with valid information" do
    let(:new_name) { "New Name" }
    let(:new_email) { "new@example.com" }
  before do
      fill_in "Name",              with: new_name
      fill_in "Email",             with: new_email
      fill_in "Password",          with: user.password
      fill_in "Confirm Password",  with: user.password
      click_button "Save changes"
  end

    it { should have_title(new_name) }
    it { should have_selector('div.alert.alert-success') }
    it { should have_link('Sign out', href: signout_path) }
    specify { expect(user.reload.name).to eq new_name }
    specify { expect(user.reload.email).to eq new_email }
end

end
end