# File lib/rspec/matchers/built_in/be_within.rb, line 5 def initialize(delta) @delta = delta end
# File lib/rspec/matchers/built_in/be_within.rb, line 39 def description "be within #{@delta}#{@unit} of #{@expected}" end
# File lib/rspec/matchers/built_in/be_within.rb, line 31 def failure_message_for_should "expected #{@actual} to #{description}" end
# File lib/rspec/matchers/built_in/be_within.rb, line 35 def failure_message_for_should_not "expected #{@actual} not to #{description}" end
# File lib/rspec/matchers/built_in/be_within.rb, line 9 def matches?(actual) @actual = actual raise needs_expected unless defined? @expected raise needs_subtractable unless @actual.respond_to? :- (@actual - @expected).abs <= @tolerance end
# File lib/rspec/matchers/built_in/be_within.rb, line 17 def of(expected) @expected = expected @tolerance = @delta @unit = '' self end
# File lib/rspec/matchers/built_in/be_within.rb, line 24 def percent_of(expected) @expected = expected @tolerance = @delta * @expected.abs / 100.0 @unit = '%' self end
# File lib/rspec/matchers/built_in/be_within.rb, line 49 def needs_expected ArgumentError.new "You must set an expected value using #of: be_within(#{@delta}).of(expected_value)" end
# File lib/rspec/matchers/built_in/be_within.rb, line 45 def needs_subtractable ArgumentError.new "The actual value (#{@actual.inspect}) must respond to `-`" end