1 files changed, 27 insertions, 0 deletions
diff --git a/activerecord/test/cases/adapters/postgresql/cidr_test.rb b/activerecord/test/cases/adapters/postgresql/cidr_test.rb
new file mode 100644
index 0000000000..f20958fbd2
--- /dev/null
+++ b/activerecord/test/cases/adapters/postgresql/cidr_test.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+require "cases/helper"
+require "ipaddr"
+
+module ActiveRecord
+  module ConnectionAdapters
+    class PostgreSQLAdapter < AbstractAdapter
+      class CidrTest < ActiveRecord::PostgreSQLTestCase
+        test "type casting IPAddr for database" do
+          type = OID::Cidr.new
+          ip = IPAddr.new("255.0.0.0/8")
+          ip2 = IPAddr.new("127.0.0.1")
+
+          assert_equal "255.0.0.0/8", type.serialize(ip)
+          assert_equal "127.0.0.1/32", type.serialize(ip2)
+        end
+
+        test "casting does nothing with non-IPAddr objects" do
+          type = OID::Cidr.new
+
+          assert_equal "foo", type.serialize("foo")
+        end
+      end
+    end
+  end
+end