pg, add test cases for updateable views.

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

 require "cases/helper"
 require "cases/view_test"
 
+class UpdateableViewTest < ActiveRecord::TestCase
+  fixtures :books
+
+  class PrintedBook < ActiveRecord::Base
+    self.primary_key = "id"
+  end
+
+  setup do
+    @connection = ActiveRecord::Base.connection
+    @connection.execute <<-SQL
+      CREATE VIEW printed_books
+        AS SELECT id, name, status, format FROM books WHERE format = 'paperback'
+    SQL
+  end
+
+  teardown do
+    @connection.execute "DROP VIEW printed_books" if @connection.table_exists? "printed_books"
+  end
+
+  def test_update_record
+    book = PrintedBook.first
+    book.name = "AWDwR"
+    book.save!
+    book.reload
+    assert_equal "AWDwR", book.name
+  end
+
+  def test_insert_record
+    PrintedBook.create! name: "Rails in Action", status: 0, format: "paperback"
+
+    new_book = PrintedBook.last
+    assert_equal "Rails in Action", new_book.name
+  end
+
+  def test_update_record_to_fail_view_conditions
+    book = PrintedBook.first
+    book.format = "ebook"
+    book.save!
+
+    assert_raises ActiveRecord::RecordNotFound do
+      book.reload
+    end
+  end
+end
+
 if ActiveRecord::Base.connection.supports_materialized_views?
 class MaterializedViewTest < ActiveRecord::TestCase
   include ViewBehavior