summaryrefslogtreecommitdiff
path: root/spec/mspec/lib/mspec/matchers/be_close.rb
blob: 2cf0fba41f99d3121986d907cebca5b6c7272c53 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
TOLERANCE = 0.00003 unless Object.const_defined?(:TOLERANCE)

class BeCloseMatcher
  def initialize(expected, tolerance)
    @expected = expected
    @tolerance = tolerance
  end

  def matches?(actual)
    @actual = actual
    (@actual - @expected).abs < @tolerance
  end

  def failure_message
    ["Expected #{@expected}", "to be within +/- #{@tolerance} of #{@actual}"]
  end

  def negative_failure_message
    ["Expected #{@expected}", "not to be within +/- #{@tolerance} of #{@actual}"]
  end
end

module MSpecMatchers
  private def be_close(expected, tolerance)
    BeCloseMatcher.new(expected, tolerance)
  end
end