Unit testing kotlin中的伴对象函数模拟
我正在使用PowerMock和Roboelectric,并希望模拟一个类的伴生对象函数。当我这样做时,我会得到一个错误:Unit testing kotlin中的伴对象函数模拟,unit-testing,kotlin,powermock,Unit Testing,Kotlin,Powermock,我正在使用PowerMock和Roboelectric,并希望模拟一个类的伴生对象函数。当我这样做时,我会得到一个错误: org.mockito.exceptions.misusing.MissingMethodInvocationException: when() requires an argument which has to be 'a method call on a mock'. For example: when(mock.getArticles()).thenRetur
org.mockito.exceptions.misusing.MissingMethodInvocationException:
when() requires an argument which has to be 'a method call on a mock'.
For example:
when(mock.getArticles()).thenReturn(articles);
我基本上是这样的:
open class MockableClass private constructor(context: Context) {
companion object {
private val INSTANCE_LOCK = Any()
private var sInstance: MockableClass? = null
@JvmStatic
fun getInstance(context: Context): MockableClass? {
synchronized(INSTANCE_LOCK) {
sInstance = (sInstance ?: MockableClass(context).let {
if (it.isValid) it
else null
}
}
return sInstance
}
}
init {
// Do some initialization using context...
// Set isValid to true/false depending on success
}
val isValid: Boolean
}
当我去测试这个时,我会假设它总是可以工作的,并且希望getInstance只返回一个模拟版本的MockableClass
@RunWith(RobolectricTestRunner::class)
@Config(manifest = "src/main/AndroidManifest.xml",
constants = BuildConfig::class,
sdk = intArrayOf(23))
@PowerMockIgnore("org.mockito.*", "org.robolectric.*", "android.*")
@PrepareForTest(MockableClass::class)
class MyTest {
private lateinit var context: Context
@get:Rule
val rule = PowerMockRule()
@Before
fun setUp() {
context = RuntimeEnvironment.application as Context
}
@Test
fun test() {
val instance = mock(MockableClass::class.java)
mockStatic(MockableClass::class.java)
`when`(MockableClass.getInstance(Matchers.isA(Context::class.java)))
.thenReturn(instance)
assertEquals(instance,
MockableClass.getInstance(RuntimeEnvironment.application as Context))
}
}
我还尝试过模仿MockableClass.Companion::class.java,但没有成功
有人知道我需要做什么才能模拟这个
getInstance
函数吗?我最后做了什么
我没有模拟静态方法,而是使用PowerMockito的whenNew
函数返回MockableClass
的模拟实例。最终代码如下所示:
@RunWith(RobolectricTestRunner::class)
@Config(manifest = "src/main/AndroidManifest.xml",
constants = BuildConfig::class,
sdk = intArrayOf(23))
@PowerMockIgnore("org.mockito.*", "org.robolectric.*", "android.*")
@PrepareForTest(MockableClass::class)
class MyTest {
private lateinit var context: Context
@JvmField
@Rule
var rule = PowerMockRule()
@Before
fun setUp() {
context = RuntimeEnvironment.application as Context
}
@Test
fun test() {
val instance = mock(MockableClass::class.java)
instance.isValid = true
whenNew<MockableClass>("com.example.MockableClass")
.withAnyArguments()
.thenReturn(instance)
assertEquals(instance, MockableClass.getInstance(context))
}
}
@RunWith(RobolectrictTestRunner::class)
@Config(manifest=“src/main/AndroidManifest.xml”,
常量=BuildConfig::类,
sdk=intArrayOf(23))
@PowerMockIgnore(“org.mockito.*”、“org.roblectric.*”、“android.*”)
@PrepareForTest(MockableClass::class)
类MyTest{
私有lateinit变量上下文:上下文
@JvmField
@统治
var rule=PowerMockRule()
@以前
趣味设置(){
上下文=RuntimeEnvironment.application作为上下文
}
@试验
趣味测试(){
val instance=mock(MockableClass::class.java)
instance.isValid=true
whenNew(“com.example.MockableClass”)
.withAnyArguments()
.thenReturn(实例)
assertEquals(实例,MockableClass.getInstance(上下文))
}
}
我会删除Robolectric标签,因为这只是关于Kotlin和反射的问题。公平地说,我不确定类加载器是否与此有关。三天之后,这完全有帮助。谢谢