output.txt

-- % spec -fs matcher_spec.rb 

a string
- should should be pretty lengthy
- can be short
- can be long
- can be too short (FAILED - 1)
- can be too long (FAILED - 2)

1)
'a string can be too short' FAILED
was not that long really
./matcher_spec.rb:26:

2)
'a string can be too long' FAILED
was unexpectedly large
./matcher_spec.rb:30:

Finished in 0.007922 seconds

5 examples, 2 failures

using_simple_matcher.rb

require 'rubygems'
require 'spec'

def be_long
  simple_matcher do |given, matcher|
    matcher.description = "should be pretty lengthy"
    matcher.failure_message = "was not that long really"
    matcher.negative_failure_message = "was unexpectedly large"

    given.length > 1
  end
end

describe "a string" do
  it { "abc".should be_long }

  it 'can be short' do
    "a".should_not be_long
  end

  it 'can be long' do
    "ab".should be_long
  end

  it 'can be too short' do
    "a".should be_long
  end

  it 'can be too long' do
    "ab".should_not be_long
  end
end