【发布时间】：2017-05-17 01:08:31
【问题描述】：
我正在尝试测试这个类：
class LoginPresenter(val mPostman: Postman) : ContractLoginPresenter, Validator.ValidationListener {
private var view: ContractLoginView? = null
override fun setView(_view: BaseView) {
view = _view as ContractLoginView
}
override fun getValidationListener(): Validator.ValidationListener {
return this
}
override fun onValidationSucceeded() {
view!!.getContext().showCircularProgressBar()
mPostman.login(view!!.getUsername(), view!!.getPassword())
}
为此，我创建了这个测试类：
@RunWith(PowerMockRunner::class)
@PrepareForTest(App::class)
class TestLoginPresenter {
var mockedPostman = mock(Postman::class.java)
var mockedComponent = mock(MainComponent::class.java)
var mockedView = mock(ContractLoginView::class.java)
var mockedContext = mock(AppCompatActivity::class.java)
var loginPresenter: LoginPresenter? = null
@Before
fun setUp() {
PowerMockito.mockStatic(App::class.java)
`when`(App.component).thenReturn(mockedComponent)
loginPresenter = LoginPresenter(mockedPostman)
loginPresenter!!.setView(mockedView)
`when`(mockedView.getContext()).thenReturn(mockedContext)
}
@Test
fun testGetValidationListener() {
assertEquals(loginPresenter!!.getValidationListener(), loginPresenter)
}
@Test
fun testOnValidationSucceeded() {
val password = "password"
val username = "username"
`when`(mockedView.getPassword()).thenReturn(password)
`when`(mockedView.getUsername()).thenReturn(username)
//Mockito.doNothing().`when`(mockedPostman).login(anyString(), anyString())
loginPresenter!!.onValidationSucceeded()
verify(mockedPostman.login(username, password))
}
以下堆栈跟踪失败：
java.lang.NullPointerException
at br.com.tyllt.controller.Postman.login(Postman.kt:26)
at br.com.tyllt.presenter.LoginPresenter.onValidationSucceeded(LoginPresenter.kt:43)
at br.com.tyllt.presenter.TestLoginPresenter.testOnValidationSucceeded(TestLoginPresenter.kt:63)
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:310)
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:294)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:127)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest(PowerMockJUnit47RunnerDelegateImpl.java:82)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:282)
at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:87)
at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:50)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:207)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:146)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:120)
at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:34)
at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:44)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:122)
at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:106)
at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:53)
at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:59)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:119)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:234)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:74)
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 com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
Process finished with exit code -1
stacktrace点是postman登录fun的最后一行的地方：
open class Postman(val mMessenger: TylltEndPoint) {
fun login(email: String, password: String) {
val user = User()
user.email = email
user.password = password
mMessenger.login(user).enqueue(ResponseWrapperCallback(EventCatalog.e0014))
}
邮递员一旦被嘲讽，为什么还要调用login()的实际实现呢？
【问题讨论】：
-
只是想知道：您是否尝试构建minimal reproducible example - 我的意思是为您自己的？只是为了证明 Kotlin 和 PowerMock 和静态模拟的整个“链”适用于一个超级简单的例子？在全面开发和真正的生产代码之前？
-
我之前已经能够在 Kotlin 中使用 Mockito。我认为这是我第一次尝试将它与 PowerMockito 一起使用。我能够使用Java解决问题。我会尽快发布我的答案
标签： android unit-testing mockito kotlin powermockito