Running the Test in Rails
Next, we'll go ahead and run the test. As expected, the test fails and gives us the message from the "must have a body" test.
$ rake test:units
/usr/bin/ruby1.8 -Ilib:test "/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake/rake_test_loader.rb" "test/unit/post_test.rb"
Loaded suite /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake/rake_test_loader
Started
F.
Finished in 0.12814 seconds.
1) Failure:
test_must_have_a_body(PostTest)
[./test/unit/post_test.rb:11:in `test_must_have_a_body'
/usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/testing/setup_and_teardown.rb:60:in `__send__'
/usr/lib/ruby/gems/1.8/gems/activesupport-2.2.2/lib/active_support/testing/setup_and_teardown.rb:60:in `run']:
Post was saved without a body.
<false> is not true.
2 tests, 2 assertions, 1 failures, 0 errors
rake aborted!
Command failed with status (1): [/usr/bin/ruby1.8 -Ilib:test "/usr/lib/ruby...]
(See full trace by running task with --trace)
Now, to implement the validation. A simple one-line addition to the Post model is all it takes.
class Post < ActiveRecord::Base
<b> validates_presence_of :body</b>
end
Run the tests again and make sure all the tests pass.
$ rake test:units
/usr/bin/ruby1.8 -Ilib:test "/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake/rake_test_loader.rb" "test/unit/post_test.rb"
Loaded suite /usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake/rake_test_loader
Started
..
Finished in 0.108586 seconds.
2 tests, 2 assertions, 0 failures, 0 errors