rspec-html-matchers

RSpec 3 matchers for testing your html (for RSpec 2 use 0.5.x version).

Goals

designed for testing complex html output. If you plan to perform simple matching, consider using:
developer-friendly output in error messages
built on top of nokogiri
has support for capybara, see below
syntax is similar to have_tag matcher from rspec-rails 1.x, but with own syntactic sugar
framework agnostic, as input should be String (or capybara's page, see below)

Install

Add to your Gemfile in the :test group:

gem 'rspec-html-matchers'

Include it in your RSpec configuration:

RSpec.configure do |config|
  config.include RSpecHtmlMatchers
end

or just in your spec(s):

describe "my view spec" do
  include RSpecHtmlMatchers

  it "has tags" do
    expect(rendered).to have_tag('div')
  end

end

Cucumber configuration:

World RSpecHtmlMatchers

as this gem requires nokogiri, here are instructions for installing it.

Usage

so perhaps your code produces following output:

<h1>Simple Form</h1>
<form action="/users" method="post">
<p>
  <input type="email" name="user[email]" />
</p>
<p>
  <input type="submit" id="special_submit" />
</p>
</form>

so you test it with the following:

expect(rendered).to have_tag('form', :with => { :action => '/users', :method => 'post' }) do
  with_tag "input", :with => { :name => "user[email]", :type => 'email' }
  with_tag "input#special_submit", :count => 1
  without_tag "h1", :text => 'unneeded tag'
  without_tag "p",  :text => /content/i
end

Example above should be self-descriptive, if not, please refer to the have_tag documentation

Input can be any html string. Let's take a look at these examples:

matching tags by css:

# simple examples:
expect('<p class="qwe rty" id="qwerty">Paragraph</p>').to have_tag('p')
expect('<p class="qwe rty" id="qwerty">Paragraph</p>').to have_tag(:p)
expect('<p class="qwe rty" id="qwerty">Paragraph</p>').to have_tag('p#qwerty')
expect('<p class="qwe rty" id="qwerty">Paragraph</p>').to have_tag('p.qwe.rty')
# more complicated examples:
expect('<p class="qwe rty" id="qwerty"><strong>Para</strong>graph</p>').to have_tag('p strong')
expect('<p class="qwe rty" id="qwerty"><strong>Para</strong>graph</p>').to have_tag('p#qwerty strong')
expect('<p class="qwe rty" id="qwerty"><strong>Para</strong>graph</p>').to have_tag('p.qwe.rty strong')
# or you can use another syntax for examples above
expect('<p class="qwe rty" id="qwerty"><strong>Para</strong>graph</p>').to have_tag('p') do
  with_tag('strong')
end
expect('<p class="qwe rty" id="qwerty"><strong>Para</strong>graph</p>').to have_tag('p#qwerty') do
  with_tag('strong')
end
expect('<p class="qwe rty" id="qwerty"><strong>Para</strong>graph</p>').to have_tag('p.qwe.rty') do
  with_tag('strong')
end

special case for classes matching:

# all of this are equivalent:
expect('<p class="qwe rty" id="qwerty">Paragraph</p>').to have_tag('p', :with => { :class => 'qwe rty' })
expect('<p class="qwe rty" id="qwerty">Paragraph</p>').to have_tag('p', :with => { :class => 'rty qwe' })
expect('<p class="qwe rty" id="qwerty">Paragraph</p>').to have_tag('p', :with => { :class => ['rty', 'qwe'] })
expect('<p class="qwe rty" id="qwerty">Paragraph</p>').to have_tag('p', :with => { :class => ['qwe', 'rty'] })

The same works with :without:

# all of this are equivalent:
expect('<p class="qwe rty" id="qwerty">Paragraph</p>').to have_tag('p', :without => { :class => 'qwe rty' })
expect('<p class="qwe rty" id="qwerty">Paragraph</p>').to have_tag('p', :without => { :class => 'rty qwe' })
expect('<p class="qwe rty" id="qwerty">Paragraph</p>').to have_tag('p', :without => { :class => ['rty', 'qwe'] })
expect('<p class="qwe rty" id="qwerty">Paragraph</p>').to have_tag('p', :without => { :class => ['qwe', 'rty'] })

content matching:

expect('<p> Some content&nbsphere</p>').to have_tag('p', :text => ' Some content here')
# or
expect('<p> Some content&nbsphere</p>').to have_tag('p') do
  with_text ' Some content here'
end

expect('<p> Some content&nbsphere</p>').to have_tag('p', :text => /Some content here/)
# or
expect('<p> Some content&nbsphere</p>').to have_tag('p') do
  with_text /Some content here/
end

# mymock.text == 'Some content here'
expect('<p> Some content&nbsphere</p>').to have_tag('p', :text => mymock.text)
# or
expect('<p> Some content&nbsphere</p>').to have_tag('p') do
  with_text mymock.text
end

# matching text content as it's seen by user:
rendered = <<HTML
<p>
   content with ignored spaces around
</p>
HTML
expect(rendered).to have_tag('p', :seen => 'content with ignored spaces around')

usage with capybara and cucumber:
```
expect(page).to have_tag( ... )
```

where page is an instance of Capybara::Session

also included shorthand matchers for form inputs:
- have_form
- with_checkbox
- with_email_field
- with_file_field
- with_hidden_field
- with_option
- with_password_field
- with_radio_button
- with_button
- with_select
- with_submit
- with_text_area
- with_text_field
- with_url_field
- with_number_field
- with_range_field
- with_date_field

and of course you can use the without_ matchers, for more info take a look at documentation

rspec 1 partial backwards compatibility:

you can match:

expect(response).to have_tag('div', 'expected content')
expect(response).to have_tag('div', /regexp matching expected content/)

RSpec 1 have_tag documentation

Matching Tag Attributes

You can also match the content of attributes by using selectors. For example, to ensure an img tag has an alt attribute, you can match:

expect(index).to have_tag("img[alt!='']")

More info

You can find more on documentation

Also, please read CHANGELOG and issues, might be helpful.

Contribution

Fork the repository
Add tests for your feature
Write the code
Add documentation for your contribution
Send a pull request

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