1 files changed, 16 insertions, 0 deletions
diff --git a/spec/initializers/0_postgresql_types_spec.rb b/spec/initializers/0_postgresql_types_spec.rb
new file mode 100644
index 00000000000..76b243033d0
--- /dev/null
+++ b/spec/initializers/0_postgresql_types_spec.rb
@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'PostgreSQL registered types' do
+  subject(:types) { ApplicationRecord.connection.send(:type_map).keys }
+
+  # These can be obtained via SELECT oid, typname from pg_type
+  it 'includes custom and standard OIDs' do
+    expect(types).to include(28, 194, 1034, 3220, 23, 20)
+  end
+
+  it 'includes custom and standard types' do
+    expect(types).to include('xid', 'pg_node_tree', '_aclitem', 'pg_lsn', 'int4', 'int8')
+  end
+end