tags: add /tag_versions page.

test/functional/tag_versions_controller_test.rb

@@ -0,0 +1,53 @@
+require 'test_helper'
+
+class TagVersionsControllerTest < ActionDispatch::IntegrationTest
+  context "The tag versions controller" do
+    context "index action" do
+      setup do
+        @user = create(:user)
+        @tag = create(:tag, name: "test", created_at: 6.months.ago, updated_at: 3.months.ago)
+        travel_to(4.hours.ago) { @tag.update!(category: Tag.categories.character, updater: @user) }
+        travel_to(3.hours.ago) { @tag.update!(is_deprecated: true, updater: @user) }
+        travel_to(2.hours.ago) { @tag.update!(is_deprecated: false, updater: @user) }
+      end
+
+      should "render" do
+        get tag_versions_path
+        assert_response :success
+      end
+
+      should "render for a tag" do
+        get tag_versions_path(search: { name_matches: @tag.name })
+        assert_response :success
+      end
+
+      should "render for a user" do
+        get tag_versions_path(search: { updater_id: @user.id })
+        assert_response :success
+      end
+
+      should "render for a json response" do
+        get tag_versions_path, as: :json
+        assert_response :success
+      end
+    end
+
+    context "show action" do
+      setup do
+        @user = create(:user)
+        @tag = create(:tag)
+        @tag.update!(category: Tag.categories.character, updater: @user)
+      end
+
+      should "render" do
+        get tag_version_path(@tag.versions.last)
+        assert_redirected_to tag_versions_path(search: { id: @tag.versions.last.id })
+      end
+
+      should "render for a json response" do
+        get tag_version_path(@tag.versions.last), as: :json
+        assert_response :success
+      end
+    end
+  end
+end