Method: CommonLib::ActiveSupportExtension::TestCase#assert_changes

Defined in:
lib/common_lib/active_support_extension/test_case.rb

#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/common_lib/active_support_extension/test_case.rb', line 170

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