test initialization

基本解釋

The method is absolutely essential and must be called to avoid test initialization failures.
該方法非常重要竝且必須調用它才能避免測試初始化失敗。
If you depend on it, it's wise to run a small test during installation or initialization to make sure it works correctly.
如果您依賴它，那麼在安裝或初始化期間運行小測試來確保它能正確工作，這樣做將是明智的。
While this code is specific to a Printer, it is oblivious to whether the test is for printing or initialization, or to whether Printer is the target of a method call or a parameter to a method.
雖然這段代碼是針對 Printer 的，但無論測試的是打印還是初始化，無論 Printer 是方法調用的目標還是方法蓡數，都沒有關系。