From c847e17300f4cacfcabf79bea746700697ce57ff Mon Sep 17 00:00:00 2001
From: Ryuta Kamizono <kamipo@gmail.com>
Date: Sun, 13 Aug 2017 22:09:28 +0900
Subject: Allow `serialize` with a custom coder on `json` and `array` columns

We already have a test case for `serialize` with a custom coder in
`PostgresqlHstoreTest`.

https://github.com/rails/rails/blob/v5.1.3/activerecord/test/cases/adapters/postgresql/hstore_test.rb#L316-L335
---
 activerecord/test/cases/json_shared_test_cases.rb | 26 ++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

(limited to 'activerecord/test/cases/json_shared_test_cases.rb')

diff --git a/activerecord/test/cases/json_shared_test_cases.rb b/activerecord/test/cases/json_shared_test_cases.rb
index 952194c6dc..56ec8c8a82 100644
--- a/activerecord/test/cases/json_shared_test_cases.rb
+++ b/activerecord/test/cases/json_shared_test_cases.rb
@@ -216,7 +216,7 @@ module JSONSharedTestCases
     assert_equal true, json.payload
   end
 
-  def test_not_compatible_with_serialize_macro
+  def test_not_compatible_with_serialize_json
     new_klass = Class.new(klass) do
       serialize :payload, JSON
     end
@@ -225,6 +225,30 @@ module JSONSharedTestCases
     end
   end
 
+  class MySettings
+    def initialize(hash); @hash = hash end
+    def to_hash; @hash end
+    def self.load(hash); new(hash) end
+    def self.dump(object); object.to_hash end
+  end
+
+  def test_json_with_serialized_attributes
+    new_klass = Class.new(klass) do
+      serialize :settings, MySettings
+    end
+
+    new_klass.create!(settings: MySettings.new("one" => "two"))
+    record = new_klass.first
+
+    assert_instance_of MySettings, record.settings
+    assert_equal({ "one" => "two" }, record.settings.to_hash)
+
+    record.settings = MySettings.new("three" => "four")
+    record.save!
+
+    assert_equal({ "three" => "four" }, record.reload.settings.to_hash)
+  end
+
   private
     def klass
       JsonDataType
-- 
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