class WithinAssay

Public Class Methods

assert_message(subject, criterion, delta) click to toggle source

Failed assertion message.

# File lib/assay/within_assay.rb, line 26
def self.assert_message(subject, criterion, delta)
  a = subject.inspect
  b = criterion.inspect
  d = delta.inspect

  if [a, b, d].any?{ |e| e.size > SIZE_LIMIT }
    "b - d <= a <= b + d\na) #{a}\nb) #{b}\nd) #{d}"
  else
    "#{b} - #{d} <= #{a} <= #{b} + #{d}"
  end
end
pass?(subject, criterion, delta) click to toggle source

Check assertion.

# File lib/assay/within_assay.rb, line 13
def self.pass?(subject, criterion, delta)
  if [subject, criterion, delta].all?{ |v| Numeric === v }
    a, b, d = subject.to_f, criterion.to_f, delta.to_f
  else
    a, b, d = subject, criterion, delta
  end

  (b - d) <= a && (b + d) >= a
end