The protesters' actions pose a test for a mayor who not long ago was on their side of the divide, shouting at the powers that be.
And Mr. de Blasio passed a key early test of any mayor during his first city budget presentation on Wednesday.
The real test of any mayor is how well the city works.
The headline said the bill was a "test" of Mayor Bloomberg's stance on welfare reform.
The bruising campaign to keep Depository Trust, which clears and trades securities for many brokerage firms and banks, was a test of Mayor Michael R. Bloomberg's policy of refusing to give in to demands from companies playing one state against another.
The death of Eric Garner, whose final moments begging for breath as a police officer gripped him around the neck were recorded on bystanders' smartphones, is the first major test of the mayor's promise.
The tax debate will be an early test of the new mayor's relationship with the governor, who was Bill Clinton's House and Urban Development secretary when de Blasio worked as a HUD appointee in New York and New Jersey.
In the annual test of wills between Mayor Rudolph W. Giuliani and the schools chancellor over whether to skip school for the Yankee parade, it appears the mayor has won once again.
Another signature test of Mayor Khan's effectiveness will be his efforts to change the way Transport for London works.
The municipal government consists of a mayor (kmet), a deputy mayor and a secretary.
