1 files changed, 106 insertions, 0 deletions
diff --git a/activerecord/test/cases/serialization_test.rb b/activerecord/test/cases/serialization_test.rb
new file mode 100644
index 0000000000..2d829ad4ba
--- /dev/null
+++ b/activerecord/test/cases/serialization_test.rb
@@ -0,0 +1,106 @@
+# frozen_string_literal: true
+
+require "cases/helper"
+require "models/contact"
+require "models/topic"
+require "models/book"
+require "models/author"
+require "models/post"
+
+class SerializationTest < ActiveRecord::TestCase
+  fixtures :books
+
+  FORMATS = [ :json ]
+
+  def setup
+    @contact_attributes = {
+      name: "aaron stack",
+      age: 25,
+      avatar: "binarydata",
+      created_at: Time.utc(2006, 8, 1),
+      awesome: false,
+      preferences: { gem: "<strong>ruby</strong>" },
+      alternative_id: nil,
+      id: nil
+    }
+  end
+
+  def test_include_root_in_json_is_false_by_default
+    assert_equal false, ActiveRecord::Base.include_root_in_json, "include_root_in_json should be false by default but was not"
+  end
+
+  def test_serialize_should_be_reversible
+    FORMATS.each do |format|
+      @serialized = Contact.new.send("to_#{format}")
+      contact = Contact.new.send("from_#{format}", @serialized)
+
+      assert_equal @contact_attributes.keys.collect(&:to_s).sort, contact.attributes.keys.collect(&:to_s).sort, "For #{format}"
+    end
+  end
+
+  def test_serialize_should_allow_attribute_only_filtering
+    FORMATS.each do |format|
+      @serialized = Contact.new(@contact_attributes).send("to_#{format}", only: [ :age, :name ])
+      contact = Contact.new.send("from_#{format}", @serialized)
+      assert_equal @contact_attributes[:name], contact.name, "For #{format}"
+      assert_nil contact.avatar, "For #{format}"
+    end
+  end
+
+  def test_serialize_should_allow_attribute_except_filtering
+    FORMATS.each do |format|
+      @serialized = Contact.new(@contact_attributes).send("to_#{format}", except: [ :age, :name ])
+      contact = Contact.new.send("from_#{format}", @serialized)
+      assert_nil contact.name, "For #{format}"
+      assert_nil contact.age, "For #{format}"
+      assert_equal @contact_attributes[:awesome], contact.awesome, "For #{format}"
+    end
+  end
+
+  def test_include_root_in_json_allows_inheritance
+    original_root_in_json = ActiveRecord::Base.include_root_in_json
+    ActiveRecord::Base.include_root_in_json = true
+
+    klazz = Class.new(ActiveRecord::Base)
+    klazz.table_name = "topics"
+    assert klazz.include_root_in_json
+
+    klazz.include_root_in_json = false
+    assert ActiveRecord::Base.include_root_in_json
+    assert !klazz.include_root_in_json
+    assert !klazz.new.include_root_in_json
+  ensure
+    ActiveRecord::Base.include_root_in_json = original_root_in_json
+  end
+
+  def test_read_attribute_for_serialization_with_format_without_method_missing
+    klazz = Class.new(ActiveRecord::Base)
+    klazz.table_name = "books"
+
+    book = klazz.new
+    assert_nil book.read_attribute_for_serialization(:format)
+  end
+
+  def test_read_attribute_for_serialization_with_format_after_init
+    klazz = Class.new(ActiveRecord::Base)
+    klazz.table_name = "books"
+
+    book = klazz.new(format: "paperback")
+    assert_equal "paperback", book.read_attribute_for_serialization(:format)
+  end
+
+  def test_read_attribute_for_serialization_with_format_after_find
+    klazz = Class.new(ActiveRecord::Base)
+    klazz.table_name = "books"
+
+    book = klazz.find(books(:awdr).id)
+    assert_equal "paperback", book.read_attribute_for_serialization(:format)
+  end
+
+  def test_find_records_by_serialized_attributes_through_join
+    author = Author.create!(name: "David")
+    author.serialized_posts.create!(title: "Hello")
+
+    assert_equal 1, Author.joins(:serialized_posts).where(name: "David", serialized_posts: { title: "Hello" }).length
+  end
+end