Question

我无法弄清楚如何为我的程序中的测试程序部分编写代码。我提供了我制作的Battery类，但需要帮助让测试人员运行所有内容。

package batterytester;

public class Battery {
    // identifies variables and cap means capacity
    double fullCharge = 2500;
    double batteryCap;

    Battery() {
        fullCharge = 2500;
    }

    public Battery(double cap) {

        batteryCap = cap;
        fullCharge = cap;

    }

    void charge() {
        batteryCap = fullCharge;
    }

    void drain(double amount) {
        batteryCap = batteryCap - amount;
    }

    double getRemainingCapacity() {
        return batteryCap;
    }
}

Answer 1

你看过tutorials on Junit了吗？使用Assert单元测试方法中使用的简单@Test语句，您的代码非常容易测试。以下是一些示例：

@Test
public void testChargeOrDrain() { // poor form to have multiple assertions but you get the idea...
    Battery battery = new Battery();
    assertNotNull("Expected a new battery object", battery);
    assertEquals("Expected a full charge of 2500", 2500, battery.getRemainingCapacity();
    battery.drain(500);
    assertEquals("Expected a partial charge of 500", 500, battery.getRemainingCapacity();
    battery.charge();
    assertEquals("Expected a full charge of 2500", 2500, battery.getRemainingCapacity();
}

彻底的单元测试将有助于排除错误和异常，并验证代码的每个功能部分是否按预期工作。例如，如果我提供负值，您drain()函数会发生什么？：）

创建Java可充电电池测试仪

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