HACKING

Grab a local clone of rtomayko/replicate:

    git clone git://github.com/rtomayko/replicate.git
    cd replicate

The default rake task installs the latest supported activerecord
version to a project local GEM_HOME=./vendor and runs the unit
tests:

    $ rake
    installing activerecord-3.1.0 to ./vendor/1.8
    installing sqlite3 to ./vendor/1.8
    Using activerecord 3.1.0
    Loaded suite ...
    Started
    ....................
    Finished in 0.150186 seconds.

    20 tests, 106 assertions, 0 failures, 0 errors

Use `rake test:all' to run tests under all activerecord versions:

    $ rake test:all
    installing activerecord ~> 2.2.3 to ./vendor
    installing activerecord ~> 2.3.14 to ./vendor
    installing activerecord ~> 3.0.10 to ./vendor
    installing activerecord ~> 3.1.0 to ./vendor
    ==> testing activerecord ~> 2.2.3
    Started
    ....................
    Finished in 0.119517 seconds.

    20 tests, 106 assertions, 0 failures, 0 errors
    ==> testing activerecord ~> 2.3.14
    Started
    ....................
    Finished in 0.119517 seconds.

    20 tests, 106 assertions, 0 failures, 0 errors
    <snip>

rake test:all should always be passing under latest stable MRI
1.8.7 and MRI 1.9.x.

Running individual test files directly requires setting the
GEM_HOME environment variable and ensuring ./lib is on the load
path:

    export GEM_HOME=vendor/1.9 # or 1.8.7
    ruby -Ilib test/active_record_test.rb

You can also control which activerecord version is used in the
test with the AR_VERSION environment variable:

    rake setup:all
    export GEM_HOME=vendor/1.8.7
    AR_VERSION=3.1.0 ruby -rubygems -Ilib test/active_record_test.rb

If you have something worth sharing, please send a pull request:

    https://github.com/rtomayko/replicate