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module Spec
module Matchers
class BeClose #:nodoc:
def initialize(expected, delta)
@expected = expected
@delta = delta
end
def matches?(actual)
@actual = actual
(@actual - @expected).abs < @delta
end
def failure_message
"expected #{@expected} +/- (<#{@delta}), got #{@actual}"
end
def description
"be close to #{@expected} (+- #{@delta})"
end
end
# :call-seq:
# should be_close(expected, delta)
# should_not be_close(expected, delta)
#
# Passes if actual == expected +/- delta
#
# == Example
#
# result.should be_close(3.0, 0.5)
def be_close(expected, delta)
Matchers::BeClose.new(expected, delta)
end
end
end
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