DRY via modules.

test/functional/posts_controller_test.rb

@@ -1,51 +1,60 @@
 require 'test_helper'
 
-class PostsControllerTest < ActionController::TestCase
-  setup do
-    @post = posts(:one)
-  end
-
-  test "should get index" do
-    get :index
-    assert_response :success
-    assert_not_nil assigns(:posts)
-  end
-
-  test "should get new" do
-    get :new
-    assert_response :success
-  end
-
-  test "should create post" do
-    assert_difference('Post.count') do
-      post :create, post: { body: @post.body, private: @post.private, title: @post.title }
+module PostsControllerBehavior
+  def self.included(controller)
+    controller.instance_eval do
+      test "should get index" do
+        get :index
+        assert_response :success
+        assert_not_nil assigns(:posts)
+      end
+
+      test "should get new" do
+        get :new
+        assert_response :success
+      end
+
+      test "should create post" do
+        assert_difference('Post.count') do
+          post :create, post: { body: @post.body, private: @post.private, title: @post.title }
+        end
+
+        assert_redirected_to post_path(assigns(:post))
+      end
+
+      test "should show post" do
+        get :show, id: @post
+        assert_response :success
+      end
+
+      test "should get edit" do
+        get :edit, id: @post
+        assert_response :success
+      end
+
+      test "should update post" do
+        put :update, id: @post, post: { body: @post.body, private: @post.private, title: @post.title }
+        assert_redirected_to post_path(assigns(:post))
+      end
+
+      test "should destroy post" do
+        assert_difference('Post.count', -1) do
+          delete :destroy, id: @post
+        end
+
+        assert_redirected_to posts_path
+      end
     end
-
-    assert_redirected_to post_path(assigns(:post))
-  end
-
-  test "should show post" do
-    get :show, id: @post
-    assert_response :success
-  end
-
-  test "should get edit" do
-    get :edit, id: @post
-    assert_response :success
   end
+end
 
-  test "should update post" do
-    put :update, id: @post, post: { body: @post.body, private: @post.private, title: @post.title }
-    assert_redirected_to post_path(assigns(:post))
+class PostsControllerTest < ActionController::TestCase
+  setup do
+    @post = posts(:one)
   end
 
-  test "should destroy post" do
-    assert_difference('Post.count', -1) do
-      delete :destroy, id: @post
-    end
+  include PostsControllerBehavior
 
-    assert_redirected_to posts_path
-  end
 end
 
 class PrivatePostsControllerTest < ActionController::TestCase
@@ -56,45 +65,6 @@ class PrivatePostsControllerTest < ActionController::TestCase
     request.env['HTTP_AUTHORIZATION'] = ActionController::HttpAuthentication::Basic.encode_credentials("foo","bar")
   end
 
-  test "should get index" do
-    get :index
-    assert_response :success
-    assert_not_nil assigns(:posts)
-  end
-
-  test "should get new" do
-    get :new
-    assert_response :success
-  end
-
-  test "should create post" do
-    assert_difference('Post.count') do
-      post :create, post: { body: @post.body, private: @post.private, title: @post.title }
-    end
-
-    assert_redirected_to post_path(assigns(:post))
-  end
-
-  test "should show post" do
-    get :show, id: @post
-    assert_response :success
-  end
+  include PostsControllerBehavior
 
-  test "should get edit" do
-    get :edit, id: @post
-    assert_response :success
-  end
-
-  test "should update post" do
-    put :update, id: @post, post: { body: @post.body, private: @post.private, title: @post.title }
-    assert_redirected_to post_path(assigns(:post))
-  end
-
-  test "should destroy post" do
-    assert_difference('Post.count', -1) do
-      delete :destroy, id: @post
-    end
-
-    assert_redirected_to posts_path
-  end
 end