Change usage of pp in Test::Unit assertions

Hi all.

I have some Test::Unit testcases that deal with Date and DateTime. If,
for whatever reason, I have a failing assert_equal on either Date or
DateTime, the resulting message is quite difficult to read: the reason
obviously is that pp dumps the content of the object, it doesn’t rely
on to_s or other more readable ways.

Is there any way to change this behaviour and make assert_equal print
Date.to_s and DateTime.to_s when the comparison fail?

TIA
MM

On Sun, Apr 13, 2008 at 5:15 AM, [email protected] wrote:

Hi all.

I have some Test::Unit testcases that deal with Date and DateTime. If,
for whatever reason, I have a failing assert_equal on either Date or
DateTime, the resulting message is quite difficult to read: the reason
obviously is that pp dumps the content of the object, it doesn’t rely
on to_s or other more readable ways.

Is there any way to change this behaviour and make assert_equal print
Date.to_s and DateTime.to_s when the comparison fail?

You have two possibilities:

  1. set Test::Unit::Assertions.use_pp to false, thus using Date#inspect,
    or
  2. create your own assertion that will use to_s. See documentation for
    Test::Unit::Assertions.
    (the easiest way would be to copy the code for assert_equal from
    assertions.rb and change the first line with build_message)

J.

On Apr 13, 1:03 pm, Jano S. [email protected] wrote:

On Sun, Apr 13, 2008 at 5:15 AM, [email protected] wrote:

Is there any way to change this behaviour and make assert_equal print
Date.to_s and DateTime.to_s when the comparison fail?

You have two possibilities:

  1. set Test::Unit::Assertions.use_pp to false, thus using Date#inspect, or

That made it. I was playing with Date#inspect, but noticed that
Test::Unit::Assertions was using PP anyway.

Thanks
MM.

On Apr 13, 11:07 am, “Phlip” [email protected] wrote:

(Use my assert{ 2.0 } instead of assert_equal), but more importantly you
need to override .inspect.

Oh nice, I didn’t know about it, I’ll give it a try.

And if you, random reader, are ignorant like me, take a look at
http://www.oreillynet.com/ruby/blog/2008/02/assert2.html :slight_smile:

Thanks
MM

On Apr 13, 2008, at 10:03 AM, Jano S. wrote:

assertions.rb and change the first line with build_message)

  1. create a Date#pretty_print and DateTime#pretty_print method.

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