The infant was hit in the face with eggs thrown by a suspect who is believed to be a white male.
Two men in their 30s were left with significant injuries.
The incident is alleged to have happened on Saturday morning.
The jury was told they would need to “steel themselves” to hear details of the attack.
John Murphy attacked the Labour leader during a visit to a mosque.
In a case of mistaken identity, a woman in a nightclub choked a man she thought had slapped her behind. The real culprit was her friend, who slapped her bottom as they were standing at the bar.
It is alleged that he kicked her in the face and "rugby-tackled" her during an argument at his Johannesburg home.
"One thing I am disappointed about, is that just last year Mduduzi apologised, went to court and committed to community work."