1 files changed, 18 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
index 23817198b1..c0907b8f21 100644
--- a/activerecord/test/cases/adapters/postgresql/type_lookup_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/type_lookup_test.rb
@@ -12,4 +12,22 @@ class PostgresqlTypeLookupTest < ActiveRecord::TestCase
     assert_equal ';', box_array.delimiter
     assert_equal ',', int_array.delimiter
   end
+
+  test "array types correctly respect registration of subtypes" do
+    int_array = @connection.type_map.lookup(1007, -1, "integer[]")
+    bigint_array = @connection.type_map.lookup(1016, -1, "bigint[]")
+    big_array = [123456789123456789]
+
+    assert_raises(RangeError) { int_array.serialize(big_array) }
+    assert_equal "{123456789123456789}", bigint_array.serialize(big_array)
+  end
+
+  test "range types correctly respect registration of subtypes" do
+    int_range = @connection.type_map.lookup(3904, -1, "int4range")
+    bigint_range = @connection.type_map.lookup(3926, -1, "int8range")
+    big_range = 0..123456789123456789
+
+    assert_raises(RangeError) { int_range.serialize(big_range) }
+    assert_equal "[0,123456789123456789]", bigint_range.serialize(big_range)
+  end
 end