Tim Hunt in MDL-20522 comments
By the way Pierre, I think you have broken 2 of the unit tests in HEAD. Can you try running the unit tests in the question folder, and see if they pass for you (Admin -> development -> unit tests, type 'question' into the text box then click run).
Pierre Pichet in MDL-20522 next comment
You are rigth, I just see this yesterday.
I will have to correct the calls so that they reflect the actual code.
On certain conditions $this->qtype->apply_unit return either a number or false
$this->assertIdentical($this->qtype->apply_unit('1km', $units), false);
$this->assertIdentical($this->qtype->apply_unit('1000 miles', array()), false);
With the new code the conditions have changed.
As a first step I will remove these two steps because they do not take account of all the new grading process so to not set "false alarm".
then i will design a more complete testing procedure.