Rails: Up and Running, 2nd Edition

Testing

rake test                      # Test all units and functionals
rake test:functionals          # Run tests for functionals
rake test:integration          # Run tests for integration
rake test:units                # Run tests for units

Unit Tests

rake test:units

Available assertions:

assert_kind_of Class, @var  # same class
assert @var                 # not nil
assert_equal 1, @p.id       # equality
@product.destroy
assert_raise(ActiveRecord::RecordNotFound) { Product.find( @product.id ) }
assert_difference 'Photo.count' { Photo.create }
assert_no_difference 'Photo.count { Photo.create(:name => 'invalid name') }

Functional Tests

rake test:functionals

Requests

get :action # a get request of the specificed action
get :action, :id => 1,
         { session_hash }, # optional session variables
         { flash_hash }    # optional messages in the flash

post :action, :foo => { :value1 => 'abc', :value2 => '123' },
              { :user_id => 17 },
              { :message => 'success' }

get, post, put, delete, head

assert_response :success
# possible parameters are:
#   :success
#   :redirect
#   :missing
#   :error

Redirects

assert_redirected_to :action => :other_action
assert_redirected_to :controller => 'foo', :action => 'bar'
assert_redirected_to http://www.invisible.ch

Rendered with template

assert_template "post/index"

Variable assignments

assert_nil assigns(:some_variable)
assert_not_nil assigns(:some_variable)
assert_equal 17, assigns(:posts).size

Rendering of specific tags

Note: assert_tag is deprecated. Use assert_select instead. Cheat sheet: http://labnotes.org/svn/public/ruby/rails_plugins/assert_select/ cheat/assert_select.html ...