1 files changed, 52 insertions, 0 deletions
diff --git a/activerecord/test/cases/adapters/postgresql/json_test.rb b/activerecord/test/cases/adapters/postgresql/json_test.rb
new file mode 100644
index 0000000000..ee08841eb3
--- /dev/null
+++ b/activerecord/test/cases/adapters/postgresql/json_test.rb
@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+require "cases/helper"
+require "cases/json_shared_test_cases"
+
+module PostgresqlJSONSharedTestCases
+  include JSONSharedTestCases
+
+  def setup
+    super
+    @connection.create_table("json_data_type") do |t|
+      t.public_send column_type, "payload", default: {} # t.json 'payload', default: {}
+      t.public_send column_type, "settings"             # t.json 'settings'
+      t.public_send column_type, "objects", array: true # t.json 'objects', array: true
+    end
+  rescue ActiveRecord::StatementInvalid
+    skip "do not test on PostgreSQL without #{column_type} type."
+  end
+
+  def test_default
+    @connection.add_column "json_data_type", "permissions", column_type, default: { "users": "read", "posts": ["read", "write"] }
+    klass.reset_column_information
+
+    assert_equal({ "users" => "read", "posts" => ["read", "write"] }, klass.column_defaults["permissions"])
+    assert_equal({ "users" => "read", "posts" => ["read", "write"] }, klass.new.permissions)
+  end
+
+  def test_deserialize_with_array
+    x = klass.new(objects: ["foo" => "bar"])
+    assert_equal ["foo" => "bar"], x.objects
+    x.save!
+    assert_equal ["foo" => "bar"], x.objects
+    x.reload
+    assert_equal ["foo" => "bar"], x.objects
+  end
+end
+
+class PostgresqlJSONTest < ActiveRecord::PostgreSQLTestCase
+  include PostgresqlJSONSharedTestCases
+
+  def column_type
+    :json
+  end
+end
+
+class PostgresqlJSONBTest < ActiveRecord::PostgreSQLTestCase
+  include PostgresqlJSONSharedTestCases
+
+  def column_type
+    :jsonb
+  end
+end