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Project: RSpec Expectations 2.14

define matcher outside rspec

In order to express my domain clearly in my code examples
As a non-rspec user
I want a shortcut to define custom matchers

Scenarios
define a matcher with default messages
Given
a file named "test_multiples.rb" with:
require "rspec/expectations"
require "test/unit"

RSpec::Matchers.define :be_a_multiple_of do |expected|
  match do |actual|
    actual % expected == 0
  end
end

class Test::Unit::TestCase
  include RSpec::Matchers
end

class TestMultiples < Test::Unit::TestCase

  def test_9_should_be_a_multiple_of_3
    9.should be_a_multiple_of(3)
  end

  def test_9_should_be_a_multiple_of_4
    9.should be_a_multiple_of(4)
  end

end
When
I run ruby test_multiples.rb
Then
the exit status should not be 0
And
the output should contain "expected 9 to be a multiple of 4"
And
the output should contain "2 tests, 0 assertions, 0 failures, 1 errors"

Last published almost 4 years ago by myronmarston.