pg tests, move uniqueness validation test to array tests.

activerecord/test/cases/adapters/postgresql/array_test.rb

@@ -271,6 +271,21 @@ def test_assigning_non_array_value
     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

activerecord/test/cases/validations/uniqueness_validation_test.rb

@@ -30,11 +30,6 @@ class ReplyWithTitleObject < Reply
   def title; ReplyTitle.new; end
 end
 
-class Employee < ActiveRecord::Base
-  self.table_name = 'postgresql_arrays'
-  validates_uniqueness_of :nicknames
-end
-
 class TopicWithUniqEvent < Topic
   belongs_to :event, foreign_key: :parent_id
   validates :event, uniqueness: true
@@ -378,18 +373,6 @@ def test_validate_uniqueness_with_non_callable_conditions_is_not_supported
     }
   end
 
-  if current_adapter? :PostgreSQLAdapter
-    def test_validate_uniqueness_with_array_column
-      e1 = Employee.create("nicknames" => ["john", "johnny"], "commission_by_quarter" => [1000, 1200])
-      assert e1.persisted?, "Saving e1"
-
-      e2 = Employee.create("nicknames" => ["john", "johnny"], "commission_by_quarter" => [2200])
-      assert !e2.persisted?, "e2 shouldn't be valid"
-      assert e2.errors[:nicknames].any?, "Should have errors for nicknames"
-      assert_equal ["has already been taken"], e2.errors[:nicknames], "Should have uniqueness message for nicknames"
-    end
-  end
-
   def test_validate_uniqueness_on_existing_relation
     event = Event.create
     assert TopicWithUniqEvent.create(event: event).valid?

activerecord/test/schema/postgresql_specific_schema.rb

 ActiveRecord::Schema.define do
 
-  %w(postgresql_arrays postgresql_times
-      postgresql_oids defaults postgresql_timestamp_with_zones
+  %w(postgresql_times postgresql_oids defaults postgresql_timestamp_with_zones
       postgresql_partitioned_table postgresql_partitioned_table_parent).each do |table_name|
     execute "DROP TABLE IF EXISTS #{quote_table_name table_name}"
   end
@@ -43,14 +42,6 @@
   execute "CREATE DOMAIN schema_1.varchar AS varchar"
   execute "CREATE DOMAIN schema_1.bpchar AS bpchar"
 
-  execute <<_SQL
-  CREATE TABLE postgresql_arrays (
-    id SERIAL PRIMARY KEY,
-    commission_by_quarter INTEGER[],
-    nicknames TEXT[]
-  );
-_SQL
-
   execute <<_SQL
   CREATE TABLE postgresql_times (
     id SERIAL PRIMARY KEY,