{To prove him} (peiraz(936e) auton). Present active participle
of peiraz(935c), testing him, not here in bad sense of tempting as
so often ( Mt 4:1 ). {What he would do} (	i (886d)ellen poiein).
Indirect question with change of tense to imperfect. As in  2:25 
so here John explains why Jesus put the question to Philip.