1 files changed, 166 insertions, 0 deletions
diff --git a/actionpack/test/dispatch/routing/route_set_test.rb b/actionpack/test/dispatch/routing/route_set_test.rb
new file mode 100644
index 0000000000..e61d47b160
--- /dev/null
+++ b/actionpack/test/dispatch/routing/route_set_test.rb
@@ -0,0 +1,166 @@
+# frozen_string_literal: true
+
+require "abstract_unit"
+
+module ActionDispatch
+  module Routing
+    class RouteSetTest < ActiveSupport::TestCase
+      class SimpleApp
+        def initialize(response)
+          @response = response
+        end
+
+        def call(env)
+          [ 200, { "Content-Type" => "text/plain" }, [response] ]
+        end
+      end
+
+      setup do
+        @set = RouteSet.new
+      end
+
+      test "not being empty when route is added" do
+        assert empty?
+
+        draw do
+          get "foo", to: SimpleApp.new("foo#index")
+        end
+
+        assert_not empty?
+      end
+
+      test "url helpers are added when route is added" do
+        draw do
+          get "foo", to: SimpleApp.new("foo#index")
+        end
+
+        assert_equal "/foo", url_helpers.foo_path
+        assert_raises NoMethodError do
+          assert_equal "/bar", url_helpers.bar_path
+        end
+
+        draw do
+          get "foo", to: SimpleApp.new("foo#index")
+          get "bar", to: SimpleApp.new("bar#index")
+        end
+
+        assert_equal "/foo", url_helpers.foo_path
+        assert_equal "/bar", url_helpers.bar_path
+      end
+
+      test "url helpers are updated when route is updated" do
+        draw do
+          get "bar", to: SimpleApp.new("bar#index"), as: :bar
+        end
+
+        assert_equal "/bar", url_helpers.bar_path
+
+        draw do
+          get "baz", to: SimpleApp.new("baz#index"), as: :bar
+        end
+
+        assert_equal "/baz", url_helpers.bar_path
+      end
+
+      test "url helpers are removed when route is removed" do
+        draw do
+          get "foo", to: SimpleApp.new("foo#index")
+          get "bar", to: SimpleApp.new("bar#index")
+        end
+
+        assert_equal "/foo", url_helpers.foo_path
+        assert_equal "/bar", url_helpers.bar_path
+
+        draw do
+          get "foo", to: SimpleApp.new("foo#index")
+        end
+
+        assert_equal "/foo", url_helpers.foo_path
+        assert_raises NoMethodError do
+          assert_equal "/bar", url_helpers.bar_path
+        end
+      end
+
+      test "only_path: true with *_url and no :host option" do
+        draw do
+          get "foo", to: SimpleApp.new("foo#index")
+        end
+
+        assert_equal "/foo", url_helpers.foo_url(only_path: true)
+      end
+
+      test "only_path: false with *_url and no :host option" do
+        draw do
+          get "foo", to: SimpleApp.new("foo#index")
+        end
+
+        assert_raises ArgumentError do
+          assert_equal "http://example.com/foo", url_helpers.foo_url(only_path: false)
+        end
+      end
+
+      test "only_path: false with *_url and local :host option" do
+        draw do
+          get "foo", to: SimpleApp.new("foo#index")
+        end
+
+        assert_equal "http://example.com/foo", url_helpers.foo_url(only_path: false, host: "example.com")
+      end
+
+      test "only_path: false with *_url and global :host option" do
+        @set.default_url_options = { host: "example.com" }
+
+        draw do
+          get "foo", to: SimpleApp.new("foo#index")
+        end
+
+        assert_equal "http://example.com/foo", url_helpers.foo_url(only_path: false)
+      end
+
+      test "explicit keys win over implicit keys" do
+        draw do
+          resources :foo do
+            resources :bar, to: SimpleApp.new("foo#show")
+          end
+        end
+
+        assert_equal "/foo/1/bar/2", url_helpers.foo_bar_path(1, 2)
+        assert_equal "/foo/1/bar/2", url_helpers.foo_bar_path(2, foo_id: 1)
+      end
+
+      test "having an optional scope with resources" do
+        draw do
+          scope "(/:foo)" do
+            resources :users
+          end
+        end
+
+        assert_equal "/users/1", url_helpers.user_path(1)
+        assert_equal "/users/1", url_helpers.user_path(1, foo: nil)
+        assert_equal "/a/users/1", url_helpers.user_path(1, foo: "a")
+      end
+
+      test "implicit path components consistently return the same result" do
+        draw do
+          resources :users, to: SimpleApp.new("foo#index")
+        end
+        assert_equal "/users/1.json", url_helpers.user_path(1, :json)
+        assert_equal "/users/1.json", url_helpers.user_path(1, format: :json)
+        assert_equal "/users/1.json", url_helpers.user_path(1, :json)
+      end
+
+      private
+        def draw(&block)
+          @set.draw(&block)
+        end
+
+        def url_helpers
+          @set.url_helpers
+        end
+
+        def empty?
+          @set.empty?
+        end
+    end
+  end
+end