Object
# File lib/rspec/matchers/built_in/change.rb, line 5 def initialize(receiver=nil, message=nil, &block) @message = message @value_proc = block || lambda {receiver.__send__(message)} @expected_after = @expected_before = @minimum = @maximum = @expected_delta = nil @eval_before = @eval_after = false end
# File lib/rspec/matchers/built_in/change.rb, line 53 def actual_delta @actual_after - @actual_before end
# File lib/rspec/matchers/built_in/change.rb, line 61 def by(expected_delta) @expected_delta = expected_delta self end
# File lib/rspec/matchers/built_in/change.rb, line 66 def by_at_least(minimum) @minimum = minimum self end
# File lib/rspec/matchers/built_in/change.rb, line 71 def by_at_most(maximum) @maximum = maximum self end
# File lib/rspec/matchers/built_in/change.rb, line 88 def description "change ##{message}" end
# File lib/rspec/matchers/built_in/change.rb, line 28 def evaluate_value_proc case val = @value_proc.call when Enumerable val.dup else val end end
# File lib/rspec/matchers/built_in/change.rb, line 37 def failure_message_for_should if @eval_before && !expected_matches_actual?(@expected_before, @actual_before) "#{message} should have initially been #{@expected_before.inspect}, but was #{@actual_before.inspect}" elsif @eval_after && !expected_matches_actual?(@expected_after, @actual_after) "#{message} should have been changed to #{@expected_after.inspect}, but is now #{@actual_after.inspect}" elsif @expected_delta "#{message} should have been changed by #{@expected_delta.inspect}, but was changed by #{actual_delta.inspect}" elsif @minimum "#{message} should have been changed by at least #{@minimum.inspect}, but was changed by #{actual_delta.inspect}" elsif @maximum "#{message} should have been changed by at most #{@maximum.inspect}, but was changed by #{actual_delta.inspect}" else "#{message} should have changed, but is still #{@actual_before.inspect}" end end
# File lib/rspec/matchers/built_in/change.rb, line 57 def failure_message_for_should_not "#{message} should not have changed, but did change from #{@actual_before.inspect} to #{@actual_after.inspect}" end
# File lib/rspec/matchers/built_in/change.rb, line 82 def from (before) @eval_before = true @expected_before = before self end
# File lib/rspec/matchers/built_in/change.rb, line 12 def matches?(event_proc) raise_block_syntax_error if block_given? @actual_before = evaluate_value_proc event_proc.call @actual_after = evaluate_value_proc (!change_expected? || changed?) && matches_before? && matches_after? && matches_expected_delta? && matches_min? && matches_max? end
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