1class BeEmptyMatcher
2  def matches?(actual)
3    @actual = actual
4    @actual.empty?
5  end
6
7  def failure_message
8    ["Expected #{@actual.inspect}", "to be empty"]
9  end
10
11  def negative_failure_message
12    ["Expected #{@actual.inspect}", "not to be empty"]
13  end
14end
15
16module MSpecMatchers
17  private def be_empty
18    BeEmptyMatcher.new
19  end
20end
21