Unit Testing of Routes

Hi,

I am trying to pull together a unit testing for routes but I am
getting confused. I have read AWDWR section 21.4 which explains how
to code the assertions.
http://guides.rubyonrails.org/testing.html#testing-routes
also basically says the same. The problem I have is working out what
else I need in my test/unit/test_routing.rb.

require File.dirname(FILE) + ‘/…/test_helper’

def test_recognizes
ActionController::Routing.use_controllers! [“quote”]
load “config/routes.rb”
test “internal routing” do
assert_recognizes({“controller” => “quote” , “action” =>
“index” }, “/quote” )
assert_recognizes({“controller” => “quote” , “action” =>
“new” }, “/” )
end
end

def test_routing
true
end

The output is the following:

$ ruby -I development test/unit/routing_test.rb
Loaded suite test/unit/routing_test
Started

Finished in 0.000182 seconds.

0 tests, 0 assertions, 0 failures, 0 errors

Agreed it is super fast, but there appears to be no testing going on.
It’s early days on my testing on Rails so I am sure I am missing
something major here. Thanks for any pointers in the right direction.

O.

The example in the guide does the testing in a functional test, where
the routing system is already loaded. I’d recommend that you do the
same.

–Matt J.

You need to put those test methods into a Test::Unit::TestCase…

On Sep 15, 2009, at 7:23 AM, icke wrote:

Hi,

I am trying to pull together a unit testing for routes but I am
getting confused. I have read AWDWR section 21.4 which explains how
to code the assertions. http://guides.rubyonrails.org/testing.html#testing-routes
also basically says the same. The problem I have is working out what
else I need in my test/unit/test_routing.rb.

Change the file name from test_routing.rb to routing_test.rb (the rake
task to run the tests is probably looking for *_test.rb). Your
specific run of the file with ruby is actually fine, however.

I typically put these into test/functional/…_test.rb because they
relate to controllers (and functional tests are really “unit tests for
controllers”).

require File.dirname(FILE) + ‘/…/test_helper’

class RoutingTest < Test::Unit::TestCase

get rid of this do-nothing test

def test_routing
true
end
end

Agreed it is super fast, but there appears to be no testing going on.
It’s early days on my testing on Rails so I am sure I am missing
something major here. Thanks for any pointers in the right direction.

O.

I would similarly avoid testing more than one route per test. I tend
to only bother with routing tests when they relate to AJAX callbacks
or otherwise represent literal URL strings in JavaScript. Your tests
seem to be verifying that you are using Rails routing properly – not
that it is wrong, but it should be more for your learning that a habit
that you continue once you understand how to create routes.

Here’s some actual code from the test/functional/
similarity_controller_test.rb on one of my projects (but only some
parts that are testing routes). (And be aware that this project is
OLD as in Rails 1.2.6 so investigate how to do the same thing in
your particular version of Rails. In particular, I know that setup is
completely different in Rails 2.x.)

require File.dirname(FILE) + ‘/…/test_helper’
require ‘similarity_controller’

Re-raise errors caught by the controller.

class SimilarityController; def rescue_action(e) raise e end; end

class SimilarityControllerTest < Test::Unit::TestCase
fixtures :users, :categories, :products

def setup
@controller = SimilarityController.new
@request = ActionController::TestRequest.new
@response = ActionController::TestResponse.new
end

def test__controller_naming
assert_equal(‘similarity’, @controller.controller_name,
“None of the routing tests will work if
controller_name is not ‘similarity’”)
end

vendor/rails/actionpack/lib/action_controller/assertions/

routing_assertions.rb

def test__route_similarity_categories
assert_routing ‘/similarity’, { :controller =>
‘similarity’, :action => ‘categories’ }
end

def test__route_similarity_trait_groups
assert_routing ‘/similarity/1/groups’, { :controller =>
‘similarity’, :action => ‘trait_groups’, :id => ‘1’ }
end

def test__route_similarity_candidates
assert_routing(’/similarity/1/group/2’,
{ :controller => ‘similarity’, :action => ‘list’,
:id => ‘1’, :trait_group => ‘2’ })
end

#…

Need to split these out in order to require that POST is used.

def test__route_similarity_make_similar
assert_recognizes({ :controller => ‘similarity’, :action =>
‘make_similar’,
:id => ‘1’, :trait_group => ‘2’, :leader =>
‘3’, :follower => ‘4’ },
{ :path => ‘/similarity/1/group/2/3/4’, :method
=> :post })

 assert_generates('/similarity/1/group/2/3/4',
                  { :controller => 'similarity', :action =>

‘make_similar’,
:id => ‘1’, :trait_group => ‘2’, :leader =>
‘3’, :follower => ‘4’ })
end

Need to split these out in order to require that DELETE is used.

def test__route_similarity_remove
assert_recognizes({ :controller => ‘similarity’, :action =>
‘remove’,
:id => ‘1’, :trait_group => ‘2’, :follower =>
‘4’ },
{ :path => ‘/similarity/1/group/2/remove/
4’, :method => :delete })

 assert_generates('/similarity/1/group/2/remove/4',
                  { :controller => 'similarity', :action =>

‘remove’,
:id => ‘1’, :trait_group => ‘2’, :follower =>
‘4’ })
end

#…
end

I hope that helps you.

-Rob

Rob B. http://agileconsultingllc.com
[email protected]

Rob and Matt,

Thanks for your reply. I have now got my head around this now, and
have now traced where my routing problem is and now have an reusable
test to check I don’t break things by changing routes.rb in future.
Rob, having a real-life example was what I was really looking for in
the documentation, I always find that more useful.

Here is my new ‘functional’ test in full as a reference for future to
just get the basic stuff going.

test/functional/routing_test.rb

require File.dirname(FILE) + ‘/…/test_helper’

class RoutingTest < ActionController::TestCase

def setup
load “config/routes.rb”
end

def test_recognizes_quote_routes
ActionController::Routing.use_controllers! [“quote”]
assert_recognizes({:controller => ‘quote’ , :action => ‘index’ },
“/quote” )
assert_recognizes({:controller => ‘quote’ , :action => ‘new’ },
“/” )
assert_recognizes({:controller => ‘quote’ , :action =>
‘affiliate’, :affiliate => ‘xxxx’}, “/xxxx” )
assert_recognizes({:controller => ‘quote’ , :action =>
‘promotion’, :affiliate => ‘scan’, :promotion => ‘promo’}, “/scan/
promo” )
end

def test_recognizes_policyholder
ActionController::Routing.use_controllers! [“policyholder”]
assert_recognizes({:controller => ‘policyholder’ , :action =>
‘new’ }, “/policyholder/new” )
assert_recognizes({:controller => ‘policyholder’ , :action =>
‘edit’, :id => ‘3’ }, “/policyholder/edit/3” )
end

def test_recognizes_confirmation
ActionController::Routing.use_controllers! [“confirmation”]
assert_recognizes({:controller => ‘confirmation’ , :action =>
‘new’ }, “/confirmation/new” )
end

end

– and to run it.

$ ruby test/functional/routing_test.rb
Loaded suite test/functional/routing_test
Started

Finished in 0.157376 seconds.

3 tests, 7 assertions, 0 failures, 0 errors

Thanks again.

O.

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