title: Rails Rspec error - undefined method `visit'
body: <p>So I'm new to TDD &amp; I'm throwing some Rspec errors here on my tests...Basically after running bundle exec rspec spec, I get an <code>undefined method 'visit'</code> error on some of my specs. Any help on how to make these tests pass would be much appreciated:  Thanks.</p>
  
  <pre><code>Failures:
  
  1) User pages profile page 
   Failure/Error: before { visit user_path(user) }
   NoMethodError:
     undefined method `visit' for # &lt;RSpec::Core::ExampleGroup::Nested_2::Nested_1:0x007ffda8049540&gt;
   # ./spec/requests/user_pages_spec.rb:9:in `block (3 levels) in &lt;top (required)&gt;'
  
  2) User pages profile page 
   Failure/Error: before { visit user_path(user) }
   NoMethodError:
     undefined method `visit' for #&lt;RSpec::Core::ExampleGroup::Nested_2::Nested_1:0x007ffda4f3ac38&gt;
   # ./spec/requests/user_pages_spec.rb:9:in `block (3 levels) in &lt;top (required)&gt;'
  
  3) User pages signup page 
   Failure/Error: before { visit signup_path }
   NoMethodError:
     undefined method `visit' for #&lt;RSpec::Core::ExampleGroup::Nested_2::Nested_2:0x007ffda8262e58&gt;
   # ./spec/requests/user_pages_spec.rb:16:in `block (3 levels) in &lt;top (required)&gt;'
  
  4) User pages signup page 
   Failure/Error: before { visit signup_path }
   NoMethodError:
     undefined method `visit' for #&lt;RSpec::Core::ExampleGroup::Nested_2::Nested_2:0x007ffda82663c8&gt;
   # ./spec/requests/user_pages_spec.rb:16:in `block (3 levels) in &lt;top (required)&gt;'
  
  Finished in 9.08 seconds
  24 examples, 4 failures
  
  Failed examples:
  
  rspec ./spec/requests/user_pages_spec.rb:11 # User pages profile page 
  rspec ./spec/requests/user_pages_spec.rb:12 # User pages profile page 
  rspec ./spec/requests/user_pages_spec.rb:18 # User pages signup page 
  rspec ./spec/requests/user_pages_spec.rb:19 # User pages signup page 
  </code></pre>
  
  <p>My spec/requests/user_pages_spec.rb</p>
  
  <pre><code>require 'spec_helper'
  
  describe "User pages" do
  
    subject { page }
  
    describe "profile page" do
      let(:user) { FactoryGirl.create(:user) } # Code to make a user variable
      before { visit user_path(user) }
  
      it { should have_selector('h1',    text: user.name) }
      it { should have_selector('title', text: user.name) }
    end
  
    describe "signup page" do
      before { visit signup_path }
  
      it { should have_selector('h1',    text: 'Sign up') }
      it { should have_selector('title', text: 'Sign up') }
    end
  end
  </code></pre>
  
  <p>And my spec/models/user_spec.rb</p>
  
  <pre><code>require 'spec_helper'
  
  describe User do
  
  before do
    @user = User.new(name: "Example User", email: "user@example.com",
                    password: "foobar", password_confirmation: "foobar")
  end
  
  subject { @user }
  
  it { should respond_to(:name) }
  it { should respond_to(:email) }
  it { should respond_to(:password_digest) }
  it { should respond_to(:password) }
  it { should respond_to(:password_confirmation) }
  it { should respond_to(:authenticate) }
  
  it { should be_valid }
  
  describe "when name is not present" do
    before { @user.name = " " }
    it { should_not be_valid }
  end
  
  describe "when email is not present" do
    before { @user.email = " " }
    it { should_not be_valid }
  end
  
  describe "when name is too long" do
    before { @user.name = "a" * 51 }
    it { should_not be_valid }
  end
  
  describe "when email format is invalid" do
    it "should be invalid" do
      addresses = %w[user@foo,com user_at_foo.org example.user@foo.
                     foo@bar_baz.com foo@bar+baz.com]
      addresses.each do |invalid_address|
        @user.email = invalid_address
        @user.should_not be_valid
      end      
    end
  end
  
  describe "when email format is valid" do
    it "should be valid" do
      addresses = %w[user@foo.COM A_US-ER@f.b.org frst.lst@foo.jp a+b@baz.cn]
      addresses.each do |valid_address|
        @user.email = valid_address
        @user.should be_valid
      end      
    end
  end
  
  describe "when email address is already taken" do
    before do
      user_with_same_email = @user.dup
      user_with_same_email.email = @user.email.upcase
      user_with_same_email.save
    end
    it { should_not be_valid }
  end
  
  describe "when password is not present" do
    before { @user.password = @user.password_confirmation = " " }
    it { should_not be_valid }
  end
  
  describe "with a password that's too short" do
    before { @user.password = @user.password_confirmation = "a" * 5 }
    it { should be_invalid }
  end
  
  describe "return value of authenticate method" do
    before { @user.save }
    let(:found_user) { User.find_by_email(@user.email) }
  
    describe "with valid password" do
      it { should == found_user.authenticate(@user.password) }
    end
  
    describe "with invalid password" do
      let(:user_for_invalid_password) { found_user.authenticate("invalid") }
  
      it { should_not == user_for_invalid_password }
      specify { user_for_invalid_password.should be_false }
    end
  end 
  
  describe "when password doesn't match confirmation" do
    before { @user.password_confirmation = "mismatch" }
    it { should_not be_valid }
  end
  
  describe "when password confirmation is nil" do
    before { @user.password_confirmation = nil }
    it { should_not be_valid }
  end
  
  end
  </code></pre>
  
  <p>And lastly my views/users/new.html.erb</p>
  
  <pre><code>&lt;% provide(:title, 'Sign up') %&gt;
  &lt;h1&gt;Sign up&lt;/h1&gt;
  &lt;p&gt;Find me in app/views/users/new.html.erb&lt;/p&gt;
  </code></pre>
  
  <p>and views/users/show.html.erb</p>
  
  <pre><code>&lt;% provide(:title, @user.name) %&gt;
  &lt;h1&gt;&lt;%= @user.name %&gt;&lt;/h1&gt;
  </code></pre>
  
  <p>&amp; I've added my UsersController</p>
  
  <pre><code>class UsersController &lt; ApplicationController
    def new
    end
  
    def show
     @user = User.find(params[:id])
    end
  end
  </code></pre>
  
  <p>Also getting this new error now after fixing as per Billy's solution</p>
  
  <pre><code>Failures:
  
  1) User pages signup page 
   Failure/Error: it { should have_selector('title', text: 'Sign up') }
   Capybara::ExpectationNotMet:
     expected to find css "title" with text "Sign up" but there were no matches. Also found "", which matched the selector but not all filters.
   # ./spec/features/user_pages_spec.rb:19:in `block (3 levels) in &lt;top (required)&gt;'
  
  2) User pages profile page 
   Failure/Error: it { should have_selector('title', text: user.name) }
   Capybara::ExpectationNotMet:
     expected to find css "title" with text "Michael Hartl" but there were no matches. Also found "", which matched the selector but not all filters.
   # ./spec/features/user_pages_spec.rb:12:in `block (3 levels) in &lt;top (required)&gt;'
  
  Finished in 9.41 seconds
  24 examples, 2 failures
  
  Failed examples:
  
  rspec ./spec/features/user_pages_spec.rb:19 # User pages signup page 
  rspec ./spec/features/user_pages_spec.rb:12 # User pages profile page 
  </code></pre>