Why, of course, by virtually starting up the Java class and pushing the buttons, so to speak. You test a Java class by calling methods on it from another Java class. The following Java source file is ...

点击“蓝色字”，关注我们哦！！ 单元测试就用 JUnit 5！好用到飞起！ 单元测试是程序员的“护身符”，写代码不测就像闭着眼睛过马路，迟早翻车。 而 JUnit 5 就是那个帮你保命的工具。 它功能强、扩展性好，用起来特别顺手。 一上来，不废话，直接来段代码。

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JUnit, a simple testing framework created by Kent Beck and Erich Gamma during a long airplane trip a few years ago, ushered in a new era of developer testing. A cottage industry grew up around "*Unit" ...