![](/img/trans.png)
[英]java.lang.IllegalStateException: no last call on a mock available with PowerMock and EasyMock
[英]PowerMock:: [java.lang.IllegalStateException: no last call on a mock available]
模擬靜態方法powermock在expect()時給出異常。
@Test
public void testRegistrarService()
{
mockStatic(IdGenerator.class);
expect(IdGenerator.generateNewId()).andReturn(42L);
long actualId=serTestObj.registerService();
replay(IdGenerator.class);
verify(IdGenerator.class);
assertEquals(42L,actualId);
}
public class ServiceRegistrator
{
public long registerService()
{
long id = IdGenerator.generateNewId();
return id;
}
}
public class IdGenerator
{
public static long generateNewId()
{
return System.currentTimeMillis();
}
}
例外情況是:
java.lang.IllegalStateException: no last call on a mock available
at org.easymock.EasyMock.getControlForLastCall(EasyMock.java:521)
at org.easymock.EasyMock.expect(EasyMock.java:499)
at home.powermock.testServiceRegistrator.testRegistrarService(testServiceRegistrator.java:51)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at com.intellij.rt.execution.junit2.JUnitStarter.main(JUnitStarter.java:31)
如何模擬staic方法,而m使用powerMock我正在使用intelliJ的想法,如何解決該異常。
您的代碼缺少注釋
@PrepareForTest(IdGenerator.class)
在我的情況下,我在我的測試類中缺少以下方法
@ObjectFactory
/**
* Configure TestNG to use the PowerMock object factory.
*/
public IObjectFactory getObjectFactory() {
return new org.powermock.modules.testng.PowerMockObjectFactory();
}
一旦我添加它,我擺脫了“沒有最后一次調用可用的模擬”錯誤。
您需要在實際調用方法之前放置重播。
編輯:我認為部分問題可能是由於您的導入造成的。 盡量不要導入靜態powermock和靜態easymock(我發現我經常迷惑自己,忘記了我需要調用哪一個重播)。
嘗試運行以下代碼。 如果它沒有正確運行,那么可能是因為你有特定版本的PowerMock / EasyMock / Junit的問題。
識別TestClass:
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.api.easymock.PowerMock;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
import static org.easymock.EasyMock.*;
import static org.junit.Assert.*;
@RunWith(PowerMockRunner.class)
@PrepareForTest(IdGenerator.class)
public class TestClass {
@Test
public void testRegistrarService()
{
ServiceRegistrator serTestObj = new ServiceRegistrator();
PowerMock.mockStatic(IdGenerator.class);
expect(IdGenerator.generateNewId()).andReturn(42L);
PowerMock.replay(IdGenerator.class);
long actualId=serTestObj.registerService();
PowerMock.verify(IdGenerator.class);
assertEquals(42L,actualId);
}
}
IdGenerator:
public class IdGenerator {
public static long generateNewId()
{
return System.currentTimeMillis();
}
}
ServiceRegistrator:
public class ServiceRegistrator {
public long registerService()
{
long id = IdGenerator.generateNewId();
return id;
}
}
這個問題已經存在了很長一段時間,但我會嘗試給它一個aswer來解釋我為解決這個問題所采取的措施。
首先,您必須使用這兩個注釋:
@RunWith(PowerMockRunner.class)
這個注釋讓當前的測試類知道如何使用它來運行他的測試,這很有用,因為我們可以使用PowerMockRunner而不是JUnitRunner
@PrepareForTest(IdGenerator.class)
這個注釋用於准備要在測試中使用的類“IdGenerator”,准備意味着我們將能夠像公共方法一樣模擬靜態方法
添加這兩個注釋后,我們必須確保使用PowerMock提供的正確軟件包:
1)PowerMock:
使用:我們將使用PowerMock使用以下代碼行模擬(而不僅僅是)我們的靜態方法
PowerMock.mockStatic(IdGenerator.class);
2)EasyMock:
使用:我們將使用EasyMock偽造我們的靜態方法返回的對象:
。EasyMock.expect(IdGenerator.generateNewId())andReturn(42L);
這是使用PowerMock和EasyMock的兩個例子,在這里我將嘗試解釋代碼及其作用:
mockStatic(IdGenerator.class);
//We mock our IdGenerator class which have the static object
expect(IdGenerator.generateNewId()).andReturn(42L);
//We fake our method return object, when we'll call generateNewId()
//method it will return 42L
//With expecting we "record" our this method and we prepare it to be
//changed (it will return our decided value)
replay(IdGenerator.class);
//We go to perform our methods "registered" with the expect method
//inside the IdGenerator class, in this case with replay we just apply
//the changes of the expect to the method generateNewId()
long actualId = serTestObj.registerService();
//We create our object (which inside have a non static method that
//use generateNewId() static method)
verify(IdGenerator.class);
//We verify that the our faked method have been called
assertEquals(42L,actualId);
//We see if the two values are matching
請注意,因為必須在創建將調用靜態偽造方法的新對象(本示例中為actualId)之前使用重放。
因為我正在使用的分心,所以也要對你要導入的內容進行大量關注
PowerMockito.mockStatic(className.class);
//from import org.powermock.api.mockito.PowerMockito;
代替
PowerMock.mockStatic(className.class);
//from import org.powermock.api.easymock.PowerMock;
我希望這個答案清楚完整
順便說一下,我將向您介紹一些有用的鏈接:
見到你:D
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.