问题描述

我想知道是否有任何方法来存根 Build.Version.SDK_INT 的值?假设我在 ClassUnderTest 中有以下几行:

I am wondering if there is anyway to stub the value of Build.Version.SDK_INT? Suppose I have the following lines in the ClassUnderTest:

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
    //do work
}else{
    //do another work
}

如何覆盖所有代码?

我的意思是我想用不同的 SDK_INT 运行两个测试来输入两个块.

I mean I want to run two tests with different SDK_INT to enter both blocks.

在 android local 单元测试中是否可以使用 Mockito/PowerMockito?

Is it possible in android local unit tests using Mockito/PowerMockito?

谢谢

推荐答案

使用反射改变值.

 static void setFinalStatic(Field field, Object newValue) throws Exception {
    field.setAccessible(true);

    Field modifiersField = Field.class.getDeclaredField("modifiers");
    modifiersField.setAccessible(true);
    modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);

    field.set(null, newValue);
 }

然后

 setFinalStatic(Build.VERSION.class.getField("SDK_INT"), 123);

经过测试.有效.

更新:有一种更清洁的方法.

创建接口

interface BuildVersionProvider {

    fun currentVersion(): Int

}

实现接口

class BuildVersionProviderImpl : BuildVersionProvider {

    override fun currentVersion() = Build.VERSION.SDK_INT

}

只要您需要当前的构建版本，就可以通过接口将此类作为构造函数参数注入.然后在测试时创建一个SUT(被测系统)对象.您可以自己实现接口.这种处理方式可能需要更多代码，但遵循 SOLID 原则，并为您提供可测试的代码，而不会弄乱反射和系统变量.

Inject this class as a constructor argument through the interface whenever you want current build version. Then in the tests when creating a SUT (System Under Test) object. You can implement the interface yourself. This way of doing things may be more code but follows the SOLID principles and gives you testable code without messing with reflection and system variables.

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