reuse view test-cases for pg materialized view tests.

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

 require "cases/helper"
+require "cases/view_test"
 
-module ViewTestConcern
-  extend ActiveSupport::Concern
-
-  included do
-    self.use_transactional_fixtures = false
-    mattr_accessor :view_type
-  end
-
-  SCHEMA_NAME = 'test_schema'
-  TABLE_NAME = 'things'
-  COLUMNS = [
-    'id integer',
-    'name character varying(50)',
-    'email character varying(50)',
-    'moment timestamp without time zone'
-  ]
-
-  class ThingView < ActiveRecord::Base
-  end
-
-  def setup
-    super
-    ThingView.table_name = "#{SCHEMA_NAME}.#{view_type}_things"
+if ActiveRecord::Base.connection.supports_materialized_views?
+class MaterializedViewTest < ActiveRecord::TestCase
+  include ViewBehavior
 
-    @connection = ActiveRecord::Base.connection
-    @connection.execute "CREATE SCHEMA #{SCHEMA_NAME} CREATE TABLE #{TABLE_NAME} (#{COLUMNS.join(',')})"
-    @connection.execute "CREATE #{view_type.humanize} #{ThingView.table_name} AS SELECT * FROM #{SCHEMA_NAME}.#{TABLE_NAME}"
+  private
+  def create_view(name, query)
+    @connection.execute "CREATE MATERIALIZED VIEW #{name} AS #{query}"
   end
 
-  def teardown
-    super
-    @connection.execute "DROP SCHEMA #{SCHEMA_NAME} CASCADE"
-  end
+  def drop_view(name)
+    @connection.execute "DROP MATERIALIZED VIEW #{name}" if @connection.table_exists? name
 
-  def test_table_exists
-    name = ThingView.table_name
-    assert @connection.table_exists?(name), "'#{name}' table should exist"
   end
-
-  def test_column_definitions
-    assert_nothing_raised do
-      assert_equal COLUMNS, columns(ThingView.table_name)
-    end
-  end
-
-  private
-    def columns(table_name)
-      @connection.send(:column_definitions, table_name).map do |name, type, default|
-        "#{name} #{type}" + (default ? " default #{default}" : '')
-      end
-    end
-
 end
-
-class ViewTest < ActiveRecord::TestCase
-  include ViewTestConcern
-  self.view_type = 'view'
-end
-
-if ActiveRecord::Base.connection.supports_materialized_views?
-  class MaterializedViewTest < ActiveRecord::TestCase
-    include ViewTestConcern
-    self.view_type = 'materialized_view'
-  end
 end

activerecord/test/cases/view_test.rb

 require "cases/helper"
 require "models/book"
 
-if ActiveRecord::Base.connection.supports_views?
-class ViewWithPrimaryKeyTest < ActiveRecord::TestCase
-  fixtures :books
+module ViewBehavior
+  extend ActiveSupport::Concern
+
+  included do
+    fixtures :books
+  end
 
   class Ebook < ActiveRecord::Base
     self.primary_key = "id"
   end
 
-  setup do
+  def setup
+    super
     @connection = ActiveRecord::Base.connection
-    @connection.execute <<-SQL
-      CREATE VIEW ebooks
-        AS SELECT id, name, status FROM books WHERE format = 'ebook'
+    create_view "ebooks", <<-SQL
+      SELECT id, name, status FROM books WHERE format = 'ebook'
     SQL
   end
 
-  teardown do
-    @connection.execute "DROP VIEW ebooks" if @connection.table_exists? "ebooks"
+  def teardown
+    super
+    drop_view "ebooks"
   end
 
   def test_reading
@@ -51,6 +55,20 @@ def test_does_not_assume_id_column_as_primary_key
   end
 end
 
+if ActiveRecord::Base.connection.supports_views?
+class ViewWithPrimaryKeyTest < ActiveRecord::TestCase
+  include ViewBehavior
+
+  private
+  def create_view(name, query)
+    @connection.execute "CREATE VIEW #{name} AS #{query}"
+  end
+
+  def drop_view(name)
+    @connection.execute "DROP VIEW #{name}" if @connection.table_exists? name
+  end
+end
+
 class ViewWithoutPrimaryKeyTest < ActiveRecord::TestCase
   fixtures :books