1 files changed, 15 insertions, 0 deletions
diff --git a/activerecord/test/cases/adapters/postgresql/type_lookup_test.rb b/activerecord/test/cases/adapters/postgresql/type_lookup_test.rb
new file mode 100644
index 0000000000..23817198b1
--- /dev/null
+++ b/activerecord/test/cases/adapters/postgresql/type_lookup_test.rb
@@ -0,0 +1,15 @@
+require 'cases/helper'
+
+class PostgresqlTypeLookupTest < ActiveRecord::TestCase
+  setup do
+    @connection = ActiveRecord::Base.connection
+  end
+
+  test "array delimiters are looked up correctly" do
+    box_array = @connection.type_map.lookup(1020)
+    int_array = @connection.type_map.lookup(1007)
+
+    assert_equal ';', box_array.delimiter
+    assert_equal ',', int_array.delimiter
+  end
+end