Module: SimplyTestable::Assertions::InstanceMethods

Defined in:
lib/simply_testable/assertions.rb

Overview

ClassMethods

Instance Method Summary collapse

Instance Method Details

#assert_changes(expression, message = nil, &block) ⇒ Object

basically a copy of assert_difference, but without any explicit comparison as it is simply stating that something will change (designed for updated_at)



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# File 'lib/simply_testable/assertions.rb', line 18

def assert_changes(expression, message = nil, &block)
  b = block.send(:binding)
  exps = Array.wrap(expression)
  before = exps.map { |e| eval(e, b) }
  yield
  exps.each_with_index do |e, i|
    error = "#{e.inspect} didn't change"
    error = "#{message}.\n#{error}" if message
    assert_not_equal(before[i], eval(e, b), error)
  end
end

#deny_changes(expression, message = nil, &block) ⇒ Object

Just a negation of assert_changes



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# File 'lib/simply_testable/assertions.rb', line 31

def deny_changes(expression, message = nil, &block)
  b = block.send(:binding)
  exps = Array.wrap(expression)
  before = exps.map { |e| eval(e, b) }
  yield
  exps.each_with_index do |e, i|
    error = "#{e.inspect} changed"
    error = "#{message}.\n#{error}" if message
    assert_equal(before[i], eval(e, b), error)
  end
end