Junit 测试静态方法内部无效方法已调用一次
我需要一些测试方面的帮助。具有以下方法:Junit 测试静态方法内部无效方法已调用一次,junit,mockito,junit4,powermock,powermockito,Junit,Mockito,Junit4,Powermock,Powermockito,我需要一些测试方面的帮助。具有以下方法: @PrePersist public void prePersist(Tag tag) { if (tagService.listUserTags(tag.getUser()) .size() > Constants.Tags.maxPerUser) { TaskUtils.createTask(url, param); } } 我想
@PrePersist
public void prePersist(Tag tag) {
if (tagService.listUserTags(tag.getUser())
.size() > Constants.Tags.maxPerUser) {
TaskUtils.createTask(url, param);
}
}
我想测试TaskUtils.createTask()是否被调用一次,但我不想执行其中的代码。我试过这样做:
@Test
@PrepareForTest(TaskUtils.class)
public void testPrePersistMethodWhenTagCountOverLimit() {
[...]
when(tags.size()).thenReturn(Constants.Tags.maxPerUser + 1);
when (tagService.listUserTags(tag.getUser())).thenReturn(tags);
PowerMockito.mockStatic(TaskUtils.class);
PowerMockito.doNothing().when(TaskUtils.class, "createTask", Mockito.any(String.class), Mockito.any(String.class));
Method method = ClassUtils.getMethodWithAnnotation(TagListener.class, PrePersist.class);
method.invoke(tagListener, tag); //here the prePersist method is called
PowerMockito.verifyStatic( Mockito.times(1));
}
但是方法TaskUtils.createTask()实际上是执行的,尽管没有执行任何操作。
堆栈跟踪的一部分:
java.lang.NullPointerException
at fi.util.TaskUtils.createTask(TaskUtils.java:90)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.powermock.reflect.internal.WhiteboxImpl.performMethodInvocation(WhiteboxImpl.java:1873)
at org.powermock.reflect.internal.WhiteboxImpl.doInvokeMethod(WhiteboxImpl.java:773)
at org.powermock.reflect.internal.WhiteboxImpl.invokeMethod(WhiteboxImpl.java:753)
at org.powermock.reflect.Whitebox.invokeMethod(Whitebox.java:466)
at org.powermock.api.mockito.internal.expectation.PowerMockitoStubberImpl.when(PowerMockitoStubberImpl.java:106)
at fi.intra.test.domain.listener.TestTagListener.testPrePersistMethodWhenTagCountOverLimit(TestTagListener.java:92)
有什么想法吗?以下是有效的,应该与您的案例相同: 我使用Gradle进行构建,并添加了以下依赖项:
testCompile组:'org.powermock',名称:'powermock mockito release full',版本:'1.6.4'
测试
package sojava.mocking;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.Mockito.times;
import static org.powermock.api.mockito.PowerMockito.*;
@RunWith(PowerMockRunner.class)
@PrepareForTest(MyData.class)
public class PowerMockitoTests {
@Test
public void static_method_when_mocked_does_nothing() throws Exception {
int amount = 123;
// Arrange
mockStatic(MyData.class);
doNothing().when(MyData.class, "increment", amount);
// Action
new MyDataWrapper().increment(amount);
verifyStatic(times(1));
MyData.increment(amount);
// Assert
assertThat(MyData.getCount()).isEqualTo(0);
}
}
你看到这个代码了吗
new MyDataWrapper().increment(amount);
verifyStatic(times(1));
MyData.increment(amount);
这很尴尬,但这就是它的工作原理。要测试静态方法是否被多次调用?然后调用该方法,然后调用verifyStatic()
,然后再次调用该静态方法。最后一个调用将触发检查
使用静态方法初始化
package sojava.mocking;
public class MyDataWrapper {
public void increment(int amount) {
MyData.increment(amount);
}
}
包含静态方法的类
package sojava.mocking;
public class MyDataWrapper {
public void increment(int amount) {
MyData.increment(amount);
}
}
包sojava.mocking
public class MyData {
private static int count = 0;
private MyData() {
}
public static void increment(int amount) {
count += amount;
}
public static int getCount() {
return count;
}
}
更多样本:更多样本位于其上。以下内容适用于您的案例: 我使用Gradle进行构建,并添加了以下依赖项:
testCompile组:'org.powermock',名称:'powermock mockito release full',版本:'1.6.4'
测试
package sojava.mocking;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.Mockito.times;
import static org.powermock.api.mockito.PowerMockito.*;
@RunWith(PowerMockRunner.class)
@PrepareForTest(MyData.class)
public class PowerMockitoTests {
@Test
public void static_method_when_mocked_does_nothing() throws Exception {
int amount = 123;
// Arrange
mockStatic(MyData.class);
doNothing().when(MyData.class, "increment", amount);
// Action
new MyDataWrapper().increment(amount);
verifyStatic(times(1));
MyData.increment(amount);
// Assert
assertThat(MyData.getCount()).isEqualTo(0);
}
}
你看到这个代码了吗
new MyDataWrapper().increment(amount);
verifyStatic(times(1));
MyData.increment(amount);
这很尴尬,但这就是它的工作原理。要测试静态方法是否被多次调用?然后调用该方法,然后调用verifyStatic()
,然后再次调用该静态方法。最后一个调用将触发检查
使用静态方法初始化
package sojava.mocking;
public class MyDataWrapper {
public void increment(int amount) {
MyData.increment(amount);
}
}
包含静态方法的类
package sojava.mocking;
public class MyDataWrapper {
public void increment(int amount) {
MyData.increment(amount);
}
}
包sojava.mocking
public class MyData {
private static int count = 0;
private MyData() {
}
public static void increment(int amount) {
count += amount;
}
public static int getCount() {
return count;
}
}
更多示例:更多示例位于其上。是参数url和参数字符串的类型?@pvpkiran,是的,我假设您有此
@RunWith(PowerMockRunner.class)
。其余的代码看起来很好是的,我有@RunWith(PowerMockRunner.class),如果你知道测试类中作为url和param传递的确切参数,那么试着直接使用它,而不是Mockito.any(String.class)。参数url和param String的类型是吗?@pvpkiran,是的,我假设你有这个@RunWith(PowerMockRunner.class)
。其余代码看起来不错是的,我有@RunWith(PowerMockRunner.class),如果您知道测试类中作为url和param传递的确切参数,那么请尝试直接使用该参数,而不是Mockito.any(String.class)。