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Weather Station Object - Unit Testing

publish date: 2026/06/17 05:25:30.326835 UTC

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Consider a WeatherStation object with a single constant attribute (identifier) and methods including reportWeather(), reportStatus(), powerSave(), remoteControl(), reconfigure(), restart(), and shutdown().

Why must the restart() method be executed before testing the shutdown() method?

Because automated test frameworks require alphabetical method ordering

Because restart() and shutdown() share the same parameter list

Because restart() initializes the identifier attribute that shutdown() reads

Because shutdown() has a dependency on the running state established by restart()

Correct Answer

Because shutdown() has a dependency on the running state established by restart()

Explanation

Some test sequences are necessary because of state dependencies. To test the shutdown() method that shuts down instruments, the restart() method must have been executed first to place the object in a running state. This illustrates that methods sometimes cannot be tested in complete isolation.

Reference

Software Engineering, Ian Sommerville, 10th edition

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