Question

我正在尝试为此util类编写单元测试。（我在编写单元测试方面经验不是很丰富）我想测试以下内容：

它会为提供空值而引发NPE。

一个非空的AmazonSNS因此被初始化。

@Singleton @ slf4j 公共类SNSClientUtil {

@Inject
private MadonnaConfig madonnaConfig;

public AmazonSNS getSNSClient(String snsTopicArn) {
    return AmazonSNSClientBuilder.standard()
            .withCredentials(new OdinAWSCredentialsProvider(madonnaConfig.getSnsOdinMaterialSet()))
            .withRegion(Regions.fromName(getRegionNameFromARN(snsTopicArn)))
            .build();
}

private String getRegionNameFromARN(String arn) {
    String[] tokens = arn.split(":");
    return tokens[3];
}

}

我正在使用Mockito。这是我的测试课：

@RunWith(MockitoJUnitRunner.class)
public class SNSClientUtilTest {

    @Mock
    SNSClientUtil snsClientUtil;

    private String topicARN = "arn:aws:sns:ap-south-1:123456789:Notifications-Devo";
    private String regionName = "ap-south-1";

    @Before
    public void setup() {

    }

    @Test(expected = NullPointerException.class)
    public void testNullTopicARN() {
        snsClientUtil.getSNSClient(null);
    }

    @Test
    public void testSNSClientCreation() {
        AmazonSNSClientBuilder builder = Mockito.mock(AmazonSNSClientBuilder.class, Mockito.RETURNS_DEEP_STUBS);
        Mockito.when(builder.build()).thenReturn(Mockito.any(AmazonSNS.class));
        AmazonSNS sns = snsClientUtil.getSNSClient(topicARN);
        Assert.assertNotNull(sns);
    }
}

空指针测试失败。因此，我尝试通过模拟AmazonSNSClientBuilder来测试非null SNS客户端的创建。但这给出了以下例外：

org.mockito.exceptions.base.MockitoException: 
Cannot mock/spy class com.amazonaws.services.sns.AmazonSNSClientBuilder
Mockito cannot mock/spy following:
  - final classes
  - anonymous classes
  - primitive types

at com.amazon.madonnaservice.test.utils.SNSClientUtilTest.testRegionNameFromARN(SNSClientUtilTest.java:40)
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.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.mockito.internal.runners.JUnit45AndHigherRunnerImpl.run(Unknown Source)
at org.mockito.runners.MockitoJUnitRunner.run(Unknown Source)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

Answer 1

Mockito给您错误

org.mockito.exceptions.base.MockitoException：无法模拟/间谍类 com.amazonaws.services.sns.AmazonSNSClientBuilder Mockito无法模拟/间谍以下： -期末课程 -匿名班 -基本类型

public final class AmazonSNSClientBuilder是最终的 https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/services/sns/AmazonSNSClientBuilder.html

因此您的模仿设置为无效。也许您可以使用来自亚马逊的另一个可以模拟的api，否则您需要引入一个包装您可以在单元测试中模拟的客户端的层。

测试AWS SNS Util类

1 个答案: