Add ActiveRecord::Tasks::DatabaseTasks.migrate

This extracts the logic that was embedded in a Rake task into a static
method.
Bonus: the first test for `rake db:migrate`

1 files changed, 13 insertions, 0 deletions

diff --git a/activerecord/test/cases/tasks/database_tasks_test.rb b/activerecord/test/cases/tasks/database_tasks_test.rb
index 0f48c8d5fc..01d373b691 100644
--- a/activerecord/test/cases/tasks/database_tasks_test.rb
+++ b/activerecord/test/cases/tasks/database_tasks_test.rb
@@ -273,6 +273,19 @@ module ActiveRecord
     end
   end
 
+  class DatabaseTasksMigrateTest < ActiveRecord::TestCase
+    def test_migrate_receives_correct_env_vars
+      verbose, version = ENV['VERBOSE'], ENV['VERSION']
+
+      ENV['VERBOSE'] = 'false'
+      ENV['VERSION'] = '4'
+
+      ActiveRecord::Migrator.expects(:migrate).with(ActiveRecord::Migrator.migrations_paths, 4)
+      ActiveRecord::Tasks::DatabaseTasks.migrate
+    ensure
+      ENV['VERBOSE'], ENV['VERSION'] = verbose, version
+    end
+  end
 
   class DatabaseTasksPurgeTest < ActiveRecord::TestCase
     include DatabaseTasksSetupper