mspec/lib/mspec/matchers/be_false.rb
class BeFalseMatcher
def matches?(actual)
@actual = actual
@actual == false
end
def failure_message
["Expected #{@actual.inspect}", "to be false"]
end
def negative_failure_message
["Expected #{@actual.inspect}", "not to be false"]
end
end
class Object
def be_false
BeFalseMatcher.new
end
end