assert_routing(path, options, defaults={}, extras={}, message=nil) public

Asserts that path and options match both ways; in other words, it verifies that path generates options and then that options generates path. This essentially combines assert_recognizes and assert_generates into one step.

The extras hash allows you to specify options that would normally be provided as a query string to the action. The message parameter allows you to specify a custom error message to display upon failure.

Examples

 # Assert a basic route: a controller with the default action (index)
 assert_routing '/home', :controller => 'home', :action => 'index'

 # Test a route generated with a specific controller, action, and parameter (id)
 assert_routing '/entries/show/23', :controller => 'entries', :action => 'show', :id => 23

 # Assert a basic route (controller + default action), with an error message if it fails
 assert_routing '/store', { :controller => 'store', :action => 'index' }, {}, {}, 'Route for store index not generated properly'

 # Tests a route, providing a defaults hash
 assert_routing 'controller/action/9', {:id => "9", :item => "square"}, {:controller => "controller", :action => "action"}, {}, {:item => "square"}

 # Tests a route with a HTTP method
 assert_routing({ :method => 'put', :path => '/product/321' }, { :controller => "product", :action => "update", :id => "321" })
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November 16, 2011
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Examples in a readable format :)

Here are the above examples in a somewhat more readable format:

# Assert a basic route: a controller with the default action (index) 
assert_routing ‘/home’, :controller => ‘home’, :action => ‘index’
# Test a route generated with a specific controller, action, and parameter (id) 
assert_routing ‘/entries/show/23’, :controller => ‘entries’, :action => ‘show’, :id => 23
# Assert a basic route (controller + default action), with an error message if it fails 
assert_routing ‘/store’, 
               { :controller => ‘store’, :action => ‘index’ }, 
               {}, 
               {}, 
               ‘Route for store index not generated properly’
# Tests a route, providing a defaults hash 
assert_routing ‘controller/action/9’, 
               {:id => “9”, :item => “square”}, 
               {:controller => “controller”, :action => “action”}, 
               {}, 
               {:item => “square”}
# Tests a route with a HTTP method 
assert_routing({ :method => ‘put’, :path => ‘/product/321’ }, 
               { :controller => “product”, :action => “update”, :id => “321” })