我一直在使用Powermock的 1.6.1 版本,所有这些实现对于静态都非常有用。 当我改为 2.0.0-beta.5 时,它现在根本不起作用。实际上,它甚至无法从之前的 1.6.1 升级到 1.7.1 。
我有这个实现:
// Power Mockito
testImplementation "org.powermock:powermock-api-mockito2:2.0.0-beta.5"
testImplementation "org.powermock:powermock-module-junit4-rule-agent:2.0.0-beta.5"
testImplementation "org.powermock:powermock-module-junit4:2.0.0-beta.5"
//testImplementation 'org.powermock:powermock-module-junit4-rule:2.0.0-beta.5'
// Mockito
testImplementation "org.mockito:mockito-core:2.11.0"
testImplementation "com.nhaarman:mockito-kotlin-kt1.1:1.5.0"
androidTestImplementation("com.nhaarman:mockito-kotlin-kt1.1:1.5.0", {
exclude group: 'org.mockito', module: 'mockito-core'
})
androidTestImplementation 'org.mockito:mockito-android:2.11.0'
我试图以与 1.6.1相同的方式模拟静态
@RunWith(PowerMockRunner::class)
@PrepareForTest(SharedPreferencesHelper.Companion::class, ConfigUseCaseTests::class)
class ConfigUseCaseTests {
lateinit var context: Context
@Before
fun setUp() {
context = mock()
}
@Test
fun getConfigs_fromJson() {
PowerMockito.mockStatic(SharedPreferencesHelper.Companion::class.java)
val instance = mock<SharedPreferencesHelper.Companion>()
doReturn("foo")
.whenever(instance)
.loadString(isA(), anyString(), anyString(), anyString())
// whenever(instance.loadString(isA(), anyString(), anyString(), anyString())).thenReturn("foo") // This shows the same error
PowerMockito.whenNew(SharedPreferencesHelper.Companion::class.java)
.withAnyArguments()
.thenReturn(instance)
val mockedFoo = instance.loadString(context, "", "", "") // This shows "foo"
val mockedCompanion = SharedPreferencesHelper.loadString(context, "", "", "") // This is throwing NullPointerException
Assert.assertEquals(mockedCompanion, "foo")
}
}
我的 SharedPreferencesHelper 如下所示:
class SharedPreferencesHelper {
companion object {
@Suppress("NON_FINAL_MEMBER_IN_OBJECT")
open fun loadString(context: Context, fileName: String, key: String, defaultValue: String?): String? {
val sharedPreferences = getWithFileName(context, fileName)
return if (!sharedPreferences.contains(key)) {
defaultValue
} else {
sharedPreferences.getString(key, defaultValue)
}
}
}
}
我尝试使用open
,但它没有用。
例外:(根本不理解)
java.lang.NullPointerException
at my.package.ConfigUseCaseTests.getConfigs_fromJson(ConfigUseCaseTests.kt:45)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:68)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:326)
at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:89)
at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:97)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:310)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:131)
我可以说,有时IT工作!我正在添加视频,因为它看起来很奇怪,它有时会发生: https://youtu.be/YZObVLcERBo(注意中间和结尾)
答案 0 :(得分:0)
在编译时创建伴随对象的方法是在周围的类中创建静态字段。它在静态范围上实例化(在实例化测试之前)。
这是Java
中反编译时的外观:
public final class SharedPreferencesHelper {
public static final SharedPreferencesHelper.Companion Companion = new
SharedPreferencesHelper.Companion((DefaultConstructorMarker)null);
// ...
}
为此,您必须使用模拟分配给定字段,而不是拦截Companion
对象的创建。这甚至不需要使用PowerMock
,可以通过反思来完成:https://dzone.com/articles/how-to-change-private-static-final-fields