1 files changed, 23 insertions, 0 deletions
diff --git a/activerecord/test/cases/adapters/postgresql/array_test.rb b/activerecord/test/cases/adapters/postgresql/array_test.rb
index fa7bebf08b..db302b6294 100644
--- a/activerecord/test/cases/adapters/postgresql/array_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/array_test.rb
@@ -1,7 +1,9 @@
 # encoding: utf-8
 require "cases/helper"
+require 'support/schema_dumping_helper'
 
 class PostgresqlArrayTest < ActiveRecord::TestCase
+  include SchemaDumpingHelper
   include InTimeZone
   OID = ActiveRecord::ConnectionAdapters::PostgreSQL::OID
 
@@ -108,6 +110,12 @@ class PostgresqlArrayTest < ActiveRecord::TestCase
     assert_equal([1, 2], x.ratings)
   end
 
+  def test_schema_dump_with_shorthand
+    output = dump_table_schema "pg_arrays"
+    assert_match %r[t.string\s+"tags",\s+array: true], output
+    assert_match %r[t.integer\s+"ratings",\s+array: true], output
+  end
+
   def test_select_with_strings
     @connection.execute "insert into pg_arrays (tags) VALUES ('{1,2,3}')"
     x = PgArray.first
@@ -263,6 +271,21 @@ class PostgresqlArrayTest < ActiveRecord::TestCase
     assert_instance_of PG::InvalidTextRepresentation, e.original_exception
   end
 
+  def test_uniqueness_validation
+    klass = Class.new(PgArray) do
+      validates_uniqueness_of :tags
+
+      def self.model_name; ActiveModel::Name.new(PgArray) end
+    end
+    e1 = klass.create("tags" => ["black", "blue"])
+    assert e1.persisted?, "Saving e1"
+
+    e2 = klass.create("tags" => ["black", "blue"])
+    assert !e2.persisted?, "e2 shouldn't be valid"
+    assert e2.errors[:tags].any?, "Should have errors for tags"
+    assert_equal ["has already been taken"], e2.errors[:tags], "Should have uniqueness message for tags"
+  end
+
   private
   def assert_cycle field, array
     # test creation