1 files changed, 18 insertions, 0 deletions
diff --git a/activerecord/test/cases/relation/predicate_builder_test.rb b/activerecord/test/cases/relation/predicate_builder_test.rb
new file mode 100644
index 0000000000..b432330deb
--- /dev/null
+++ b/activerecord/test/cases/relation/predicate_builder_test.rb
@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+require "cases/helper"
+require "models/topic"
+
+module ActiveRecord
+  class PredicateBuilderTest < ActiveRecord::TestCase
+    def test_registering_new_handlers
+      Topic.predicate_builder.register_handler(Regexp, proc do |column, value|
+        Arel::Nodes::InfixOperation.new("~", column, Arel.sql(value.source))
+      end)
+
+      assert_match %r{["`]topics["`]\.["`]title["`] ~ rails}i, Topic.where(title: /rails/).to_sql
+    ensure
+      Topic.reset_column_information
+    end
+  end
+end