class RSpec::Matchers::BuiltIn::ChangeDetails
@private Encapsulates the details of the before/after values.
Attributes
actual_after[R]
actual_before[R]
message[R]
Public Class Methods
new(receiver=nil, message=nil, &block)
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# File lib/rspec/matchers/built_in/change.rb, line 312 def initialize(receiver=nil, message=nil, &block) if receiver && !message raise( ArgumentError, "`change` requires either an object and message " "(`change(obj, :msg)`) or a block (`change { }`). " "You passed an object but no message." ) end @message = message ? "##{message}" : "result" @value_proc = block || lambda { receiver.__send__(message) } end
Public Instance Methods
actual_delta()
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# File lib/rspec/matchers/built_in/change.rb, line 335 def actual_delta @actual_after - @actual_before end
changed?()
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# File lib/rspec/matchers/built_in/change.rb, line 331 def changed? @actual_before != @actual_after end
perform_change(event_proc)
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# File lib/rspec/matchers/built_in/change.rb, line 325 def perform_change(event_proc) @actual_before = evaluate_value_proc event_proc.call @actual_after = evaluate_value_proc end
Private Instance Methods
evaluate_value_proc()
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# File lib/rspec/matchers/built_in/change.rb, line 341 def evaluate_value_proc case val = @value_proc.call when IO # enumerable, but we don't want to dup it. val when Enumerable, String val.dup else val end end