How can we have a good collaboration if the other party is saying that he is "just planting a test" to know us more? 
 I personally believe that the foundation of a successful collaboration 
is trust. There’s only so much you can do if the other party starts 
behaving unprofessionally for unfounded reasons. Don’t waste everyone’s 
time and efforts. Engaging in collaborations will let you know all the 
people involved through their commitment and work ethics not by planting
 so-called “tests.”
—mbm 05/25/2018

