Fix db state leaking across tests

test/grape_test.rb

@@ -4,25 +4,42 @@
 
 class ActiveModelSerializers::GrapeTest < Minitest::Test
   include Rack::Test::Methods
+  module Models
+    def self.model1
+      ARModels::Post.new(id: 1, title: 'Dummy Title', body: 'Lorem Ipsum')
+    end
+
+    def self.model2
+      ARModels::Post.new(id: 2, title: 'Second Dummy Title', body: 'Second Lorem Ipsum')
+    end
+
+    def self.all
+      @all ||=
+      begin
+        model1.save!
+        model2.save!
+        ARModels::Post.all
+      end
+    end
+  end
 
   class GrapeTest < Grape::API
     format :json
     include Grape::ActiveModelSerializers
 
     resources :grape do
       get '/render' do
-        render ARModels::Post.new(title: 'Dummy Title', body: 'Lorem Ipsum')
+        render Models.model1
       end
 
       get '/render_with_json_api' do
-        post = ARModels::Post.new(title: 'Dummy Title', body: 'Lorem Ipsum')
+        post = Models.model1
         render post, meta: { page: 1, total_pages: 2 }, adapter: :json_api
       end
 
       get '/render_array_with_json_api' do
-        post = ARModels::Post.create(title: 'Dummy Title', body: 'Lorem Ipsum')
-        post.dup.save
-        render ARModels::Post.all, adapter: :json_api
+        posts = Models.all
+        render posts, adapter: :json_api
       end
     end
   end
@@ -34,7 +51,7 @@ def app
   def test_formatter_returns_json
     get '/grape/render'
 
-    post = ARModels::Post.new(title: 'Dummy Title', body: 'Lorem Ipsum')
+    post = Models.model1
     serializable_resource = serializable(post)
 
     assert last_response.ok?
@@ -44,7 +61,7 @@ def test_formatter_returns_json
   def test_render_helper_passes_through_options_correctly
     get '/grape/render_with_json_api'
 
-    post = ARModels::Post.new(title: 'Dummy Title', body: 'Lorem Ipsum')
+    post = Models.model1
     serializable_resource = serializable(post, serializer: ARModels::PostSerializer, adapter: :json_api, meta: { page: 1, total_pages: 2 })
 
     assert last_response.ok?
@@ -54,36 +71,12 @@ def test_render_helper_passes_through_options_correctly
   def test_formatter_handles_arrays
     get '/grape/render_array_with_json_api'
 
-    expected = {
-      'data' => [
-        {
-          id: '1',
-          type: 'ar_models_posts',
-          attributes: {
-            title: 'Dummy Title',
-            body: 'Lorem Ipsum'
-          },
-          relationships: {
-            comments: { data: [] },
-            author: { data: nil }
-          }
-        },
-        {
-          id: '2',
-          type: 'ar_models_posts',
-          attributes: {
-            title: 'Dummy Title',
-            body: 'Lorem Ipsum'
-          },
-          relationships: {
-            comments: { data: [] },
-            author: { data: nil }
-          }
-        }
-      ]
-    }
+    posts = Models.all
+    serializable_resource = serializable(posts, adapter: :json_api)
 
     assert last_response.ok?
-    assert_equal expected.to_json, last_response.body
+    assert_equal serializable_resource.to_json, last_response.body
+  ensure
+    ARModels::Post.delete_all
   end
 end

test/serializers/associations_test.rb

@@ -153,6 +153,9 @@ def test_virtual_attribute_block
         }
 
         assert_equal expected, actual
+      ensure
+        ::ARModels::Post.delete_all
+        ::ARModels::Comment.delete_all
       end
 
       class NamespacedResourcesTest < Minitest::Test