[Fix #532] Fix a false positive for Rails/HttpPositionalArguments

Fixes #532.

This PR fixes a false positive for `Rails/HttpPositionalArguments`
when defining `get` in `Rails.application.routes.draw` block.

CHANGELOG.md

@@ -12,6 +12,7 @@
 
 * [#528](https://github.com/rubocop/rubocop-rails/issues/528): Fix a false positive for `Rails/HasManyOrHasOneDependent` when specifying `:dependent` strategy with double splat. ([@koic][])
 * [#529](https://github.com/rubocop/rubocop-rails/issues/529): Fix a false positive for `Rails/LexicallyScopedActionFilter` when action method is aliased by `alias_method`. ([@koic][])
+* [#532](https://github.com/rubocop/rubocop-rails/issues/532): Fix a false positive for `Rails/HttpPositionalArguments` when defining `get` in `Rails.application.routes.draw` block. ([@koic][])
 
 ## Changes
 

lib/rubocop/cop/rails/http_positional_arguments.rb

@@ -27,6 +27,7 @@ class HttpPositionalArguments < Base
         KEYWORD_ARGS = %i[
           method params session body flash xhr as headers env to
         ].freeze
+        ROUTING_METHODS = %i[draw routes].freeze
         RESTRICT_ON_SEND = %i[get post put patch delete head].freeze
 
         minimum_target_rails_version 5.0
@@ -40,6 +41,8 @@ class HttpPositionalArguments < Base
         PATTERN
 
         def on_send(node)
+          return if in_routing_block?(node)
+
           http_request?(node) do |data|
             return unless needs_conversion?(data)
 
@@ -63,6 +66,10 @@ def on_send(node)
 
         private
 
+        def in_routing_block?(node)
+          !!node.each_ancestor(:block).detect { |block| ROUTING_METHODS.include?(block.send_node.method_name) }
+        end
+
         def needs_conversion?(data)
           return true unless data.hash_type?
           return false if kwsplat_hash?(data)

spec/rubocop/cop/rails/http_positional_arguments_spec.rb

@@ -415,5 +415,21 @@
         RUBY
       end
     end
+
+    it 'does not register an offense when defining `get` in `routes` block' do
+      expect_no_offenses(<<~RUBY)
+        routes do
+          get :list, on: :collection
+        end
+      RUBY
+    end
+
+    it 'does not register an offense when defining `get` in `routes.draw` block' do
+      expect_no_offenses(<<~RUBY)
+        Rails.application.routes.draw do
+          get :list, on: :collection
+        end
+      RUBY
+    end
   end
 end