This is how I test the pull request

gistfile1.txt

Given you're testing this pull request: https://github.com/rails/rails/pull/338
You'll found out that the commit is from 'smartinez87'

[master][~/Projects/rails] git remote add smartinez87 https://github.com/smartinez87/rails.git
[master][~/Projects/rails] git remote show smartinez87
* remote smartinez87
  Fetch URL: https://github.com/smartinez87/rails.git
  Push  URL: https://github.com/smartinez87/rails.git
  HEAD branch: master
  Remote branches:
    1-2-stable     new (next fetch will store in remotes/smartinez87)
    2-0-stable     new (next fetch will store in remotes/smartinez87)
    2-1-stable     new (next fetch will store in remotes/smartinez87)
    2-2-stable     new (next fetch will store in remotes/smartinez87)
    2-3-stable     new (next fetch will store in remotes/smartinez87)
    3-0-1-security new (next fetch will store in remotes/smartinez87)
    3-0-4-security new (next fetch will store in remotes/smartinez87)
    3-0-6          new (next fetch will store in remotes/smartinez87)
    3-0-7          new (next fetch will store in remotes/smartinez87)
    3-0-stable     new (next fetch will store in remotes/smartinez87)
    deps_refactor  new (next fetch will store in remotes/smartinez87)
    doc_obs_array  new (next fetch will store in remotes/smartinez87)
    encoding       new (next fetch will store in remotes/smartinez87)
    master         new (next fetch will store in remotes/smartinez87)
    streaming      new (next fetch will store in remotes/smartinez87)
  Local refs configured for 'git push':
    3-0-stable pushes to 3-0-stable (local out of date)
    master     pushes to master     (local out of date)
[master][~/Projects/rails] git fetch smartinez87
remote: Counting objects: 48, done.
remote: Compressing objects: 100% (24/24), done.
remote: Total 26 (delta 20), reused 1 (delta 0)
Unpacking objects: 100% (26/26), done.
From https://github.com/smartinez87/rails
 * [new branch]      1-2-stable -> smartinez87/1-2-stable
 * [new branch]      2-0-stable -> smartinez87/2-0-stable
 * [new branch]      2-1-stable -> smartinez87/2-1-stable
 * [new branch]      2-2-stable -> smartinez87/2-2-stable
 * [new branch]      2-3-stable -> smartinez87/2-3-stable
 * [new branch]      3-0-1-security -> smartinez87/3-0-1-security
 * [new branch]      3-0-4-security -> smartinez87/3-0-4-security
 * [new branch]      3-0-6      -> smartinez87/3-0-6
 * [new branch]      3-0-7      -> smartinez87/3-0-7
 * [new branch]      3-0-stable -> smartinez87/3-0-stable
 * [new branch]      deps_refactor -> smartinez87/deps_refactor
 * [new branch]      doc_obs_array -> smartinez87/doc_obs_array
 * [new branch]      encoding   -> smartinez87/encoding
 * [new branch]      master     -> smartinez87/master
 * [new branch]      streaming  -> smartinez87/streaming
[master][~/Projects/rails] git checkout -b 338
[338][~/Projects/rails] git merge 02d85da
Merge made by recursive.
 .../abstract/connection_pool.rb                    |    2 +-
 .../abstract/schema_statements.rb                  |    2 +-
 .../connection_adapters/mysql2_adapter.rb          |    2 +-
 .../connection_adapters/mysql_adapter.rb           |    2 +-
 .../connection_adapters/postgresql_adapter.rb      |    2 +-
 .../connection_adapters/sqlite_adapter.rb          |    2 +-
 activerecord/lib/active_record/reflection.rb       |    4 ++--
 .../connection_adapters/fake_adapter.rb            |    2 +-
 activerecord/test/cases/migration_test.rb          |    9 ++++-----
 9 files changed, 13 insertions(+), 14 deletions(-)
[338][~/Projects/rails] 

Now run `rake` to test it :)