After service of a copy of the complaint and after reasonable notice to the other party or parties, any party shall be authorized to take depositions to sustain or invalidate the election. The proceedings shall take precedence over all other business of the court or of any of the judges and shall be heard and determined as soon as possible. The contest shall be heard and determined without a jury, on the testimony thus taken and on any other legal testimony that may be adduced by any party. In judging the contest, the court shall proceed on the merits thereof and decide the same according to the Constitution and statutes of the Commonwealth.