Fix class and method name typos

activerecord/test/cases/migration/change_schema_test.rb

@@ -235,7 +235,7 @@ def test_change_column_quotes_column_names
         end
       end
 
-      def test_keeping_default_and_notnull_constaint_on_change
+      def test_keeping_default_and_notnull_constraints_on_change
         connection.create_table :testings do |t|
           t.column :title, :string
         end

activerecord/test/cases/persistence_test.rb

@@ -18,7 +18,7 @@
 require 'models/toy'
 require 'rexml/document'
 
-class PersistencesTest < ActiveRecord::TestCase
+class PersistenceTest < ActiveRecord::TestCase
   fixtures :topics, :companies, :developers, :projects, :computers, :accounts, :minimalistics, 'warehouse-things', :authors, :categorizations, :categories, :posts, :minivans, :pets, :toys
 
   # Oracle UPDATE does not support ORDER BY

activerecord/test/cases/primary_keys_test.rb

@@ -205,7 +205,7 @@ def test_set_primary_key_with_no_connection
   class PrimaryKeyWithAnsiQuotesTest < ActiveRecord::TestCase
     self.use_transactional_fixtures = false
 
-    def test_primaery_key_method_with_ansi_quotes
+    def test_primary_key_method_with_ansi_quotes
       con = ActiveRecord::Base.connection
       con.execute("SET SESSION sql_mode='ANSI_QUOTES'")
       assert_equal "id", con.primary_key("topics")