Please describe the problem:
The goal is to manage a small computer test lab with planner. Minimum setup is a
resource "manpower" and a resource "laboratory space". If create a new task
"testing" which means that a machine is going under test. 

I expect that the test will take me one workday of effort. So the task is
entered with a workload of 1 day. Then I assign resources:
"Laboratory space" is occupied for 100% until the task is completed
"Manpower" is only available at 10% since I have other things to do as well.

Steps to reproduce:
1. Create new project
2. Create ressources "manpower" (work) and "laboratory space" material
3. Create task "testing" and assing 100% laboratory space and 10% work to it.
4. See the Gantt chart

Actual results:
The Gantt chart shows that the task is finished in one day duration. 

Expected results:
Since the manwpower to fulfill the task is only available at 10% I would have
expected the task to have a duration of 10 days. That's also what happens if I
assign the 10% manpower only, but if I assign the laboratory space at 100% the
task duration is calculated based only on the 100% of laboratory space.  

Does this happen every time?
Yes.

Other information:
The question is, which concept of resources is implemented. My concept was that
I have a resource "laboratory" space that is sort of binary, if a machine is
tested then the assigned space is occupied 100% until the task is finished and I
need to have an overview about how many instances of "laboratory space" are free
at a certain moment. Am I expecting too much from planner?