diff --git a/rename-method/lib/after.rb b/rename-method/lib/after.rb
index e69de29..d6b8ee4 100644
--- a/rename-method/lib/after.rb
+++ b/rename-method/lib/after.rb
@@ -0,0 +1,10 @@
+class UserService
+  USERNAME = "josemota"
+  PASSWORD = "secret"
+
+  class << self
+    def sign_in username, password
+      username == USERNAME && password == PASSWORD
+    end
+  end
+end
diff --git a/rename-method/lib/before.rb b/rename-method/lib/before.rb
index e69de29..99d45b5 100644
--- a/rename-method/lib/before.rb
+++ b/rename-method/lib/before.rb
@@ -0,0 +1,10 @@
+class UserService
+  USERNAME = "josemota"
+  PASSWORD = "secret"
+
+  class << self
+    def login username, password
+      username == USERNAME && password == PASSWORD
+    end
+  end
+end
diff --git a/rename-method/test/test.rb b/rename-method/test/test.rb
index a8f6974..694b4b9 100644
--- a/rename-method/test/test.rb
+++ b/rename-method/test/test.rb
@@ -1,5 +1,15 @@
-require 'minitest/spec'
 require 'minitest/autorun'
+require 'minitest/spec'
 
 require 'before' if ENV["BEFORE"]
 require 'after' unless ENV["BEFORE"]
+
+describe UserService do
+  it "can log in" do
+    if ENV["BEFORE"]
+      assert UserService.login("josemota", "secret")
+    else
+      assert UserService.sign_in("josemota", "secret")
+    end
+  end
+end