The notable exception in this class is Math.random , which intentionally returns a different value every time you call it.
此类中值得注意的特例就是Math . random，它会刻意地在您每次调用它时返回一个不同的值。
The system under test does not make a direct global function call to Math.random in order to determine the initial image state of the reels.
被测系统并未直接调用全局函数Math . random，来决定每个轴初始的图片状态。
Notice how the test avoids the risks of mutable state and side effects by not overwriting the native Math.random implementation of the browser.
请注意测试没有覆盖浏览器原生的Math . random实现，从而避免了状态变化的风险和副作用。
Notice how the test avoids the risks of mutable state and side effects by not overwriting the native Math.random implementation of the browser.
请注意测试没有覆盖浏览器原生的Math . random实现，从而避免了状态变化的风险和副作用。
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