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