It doesn't make sense to have a stack that pushes but doesn't pop, so you test the methods together as part of the contract the stack exposes to its client.

拥有可以推动但不能弹出的堆栈没有任何意义，因此，您可以将这些方法作为堆栈暴露给其客户机的契约的一部分进行测试。

youdao

Her parents are very tolerant, but sometimes she pushes them too far.

她的父母十分宽容，但她有时也让他们忍无可忍。

《牛津词典》

I've known him for years, but I still don't know what pushes his buttons.

我已认识他多年，可还是摸不透他的脾气。

《牛津词典》

Kik is a popular alternative that not only pushes messages but also includes a bevy of metadata that helps contextualize chat conversations like knowing when a message has been delivered and read.

ENGADGET: This is the Modem World: Why are we still texting?

She fumbles with that slide, but pushes on.

FORBES: Shiny Objects And Other Things That Distract Me

But he pushes on, and even joined his fellow Rangers for a grueling 20-mile march.

WHITEHOUSE: Medal of Honor for Sergeant First Class Leroy Arthur Petry