java - 如何模拟 InjectMocks 期间创建的其他类的对象？

Question

我想测试我的 saveEmployee 方法，但问题是在 @InjectMocks 期间，调用了 EmployeeBase 类的构造函数并调用了 fetchEmployees() 方法。此方法的目的是从数据库中获取数据到 EmployeeBase 类中的员工列表。问题是这个方法使用来自常量类的字段，当我运行程序时我得到以下结果。如何正确模拟它？

class EmployeeBaseTest {
    @InjectMocks
    private EmployeeBase employeeBase;

    @Mock
    private Response response;
    
    @BeforeEach
    void beforeEach() {
        MockitoAnnotations.openMocks(this);
    }

    @Test
    void saveEmployeeTest() {
        // given
        Employee employee = new Employee();

        // when
        when(fetchEmployees()).thenReturn(Collections.emptyList());
        employeeBase.saveEmployee(employee);
        
        
        // then
        assertEquals("TEST", response.getBody());
    }
}

public class EmployeeBase {
    private final Response response;
    private final List<Employee> employees;

    public EmployeeBase(Response response) {
        this.response = response;
        employees = fetchEmployees();
    }

    public void saveEmployee(Employee employee) {
        //...
    }
}

public final class EmployeeUtils {

    private EmployeeUtils() {}

    public static List<Employee> fetchEmployees() {
        ScanRequest scanRequest = new ScanRequest().withTableName(EMPLOYEES);
        ScanResult scanResult = AMAZON_DYNAMO_DB.scan(scanRequest);
        List<Employee> employees = new ArrayList<>();
        for (Map<String, AttributeValue> employee : scanResult.getItems()){
            employees.add(parseEmployee(employee));
        }
        return employees;
    }
}

public final class Constants {
    protected static final String EMPLOYEES = "EMPLOYEES";
    protected static final AmazonDynamoDB AMAZON_DYNAMO_DB = AmazonDynamoDBClientBuilder.defaultClient();

    private Constants() {}
}

更新后

还是行不通。我得到的错误：

C:\Users\michal\.jdks\corretto-11.0.10\bin\java.exe -ea -Didea.test.cyclic.buffer.size=1048576 "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2020.3.2\lib\idea_rt.jar=55542:C:\Program Files\JetBrains\IntelliJ IDEA 2020.3.2\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\JetBrains\IntelliJ IDEA 2020.3.2\lib\idea_rt.jar;C:\Users\michal\.m2\repository\org\junit\platform\junit-platform-launcher\1.4.1\junit-platform-launcher-1.4.1.jar;C:\Users\michal\.m2\repository\org\junit\platform\junit-platform-engine\1.4.1\junit-platform-engine-1.4.1.jar;C:\Users\michal\.m2\repository\org\junit\vintage\junit-vintage-engine\5.3.2\junit-vintage-engine-5.3.2.jar;C:\Program Files\JetBrains\IntelliJ IDEA 2020.3.2\plugins\junit\lib\junit5-rt.jar;C:\Program Files\JetBrains\IntelliJ IDEA 2020.3.2\plugins\junit\lib\junit-rt.jar;C:\Users\michal\Documents\idea-projects\serverless\post-employee\target\test-classes;C:\Users\michal\Documents\idea-projects\serverless\post-employee\target\classes;C:\Users\michal\.m2\repository\com\amazonaws\aws-lambda-java-core\1.2.1\aws-lambda-java-core-1.2.1.jar;C:\Users\michal\.m2\repository\com\amazonaws\aws-lambda-java-events\3.6.0\aws-lambda-java-events-3.6.0.jar;C:\Users\michal\.m2\repository\joda-time\joda-time\2.6\joda-time-2.6.jar;C:\Users\michal\.m2\repository\com\amazonaws\aws-java-sdk-dynamodb\1.11.957\aws-java-sdk-dynamodb-1.11.957.jar;C:\Users\michal\.m2\repository\com\amazonaws\aws-java-sdk-s3\1.11.957\aws-java-sdk-s3-1.11.957.jar;C:\Users\michal\.m2\repository\com\amazonaws\aws-java-sdk-kms\1.11.957\aws-java-sdk-kms-1.11.957.jar;C:\Users\michal\.m2\repository\com\amazonaws\aws-java-sdk-core\1.11.957\aws-java-sdk-core-1.11.957.jar;C:\Users\michal\.m2\repository\commons-logging\commons-logging\1.1.3\commons-logging-1.1.3.jar;C:\Users\michal\.m2\repository\org\apache\httpcomponents\httpclient\4.5.13\httpclient-4.5.13.jar;C:\Users\michal\.m2\repository\org\apache\httpcomponents\httpcore\4.4.13\httpcore-4.4.13.jar;C:\Users\michal\.m2\repository\commons-codec\commons-codec\1.11\commons-codec-1.11.jar;C:\Users\michal\.m2\repository\software\amazon\ion\ion-java\1.0.2\ion-java-1.0.2.jar;C:\Users\michal\.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.6.7.4\jackson-databind-2.6.7.4.jar;C:\Users\michal\.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.6.0\jackson-annotations-2.6.0.jar;C:\Users\michal\.m2\repository\com\fasterxml\jackson\core\jackson-core\2.6.7\jackson-core-2.6.7.jar;C:\Users\michal\.m2\repository\com\fasterxml\jackson\dataformat\jackson-dataformat-cbor\2.6.7\jackson-dataformat-cbor-2.6.7.jar;C:\Users\michal\.m2\repository\com\amazonaws\jmespath-java\1.11.957\jmespath-java-1.11.957.jar;C:\Users\michal\.m2\repository\org\projectlombok\lombok\1.18.18\lombok-1.18.18.jar;C:\Users\michal\.m2\repository\com\googlecode\json-simple\json-simple\1.1.1\json-simple-1.1.1.jar;C:\Users\michal\.m2\repository\junit\junit\4.10\junit-4.10.jar;C:\Users\michal\.m2\repository\org\hamcrest\hamcrest-core\1.1\hamcrest-core-1.1.jar;C:\Users\michal\.m2\repository\com\google\code\gson\gson\2.8.6\gson-2.8.6.jar;C:\Users\michal\.m2\repository\org\junit\jupiter\junit-jupiter-engine\5.3.2\junit-jupiter-engine-5.3.2.jar;C:\Users\michal\.m2\repository\org\apiguardian\apiguardian-api\1.0.0\apiguardian-api-1.0.0.jar;C:\Users\michal\.m2\repository\org\junit\platform\junit-platform-engine\1.3.2\junit-platform-engine-1.3.2.jar;C:\Users\michal\.m2\repository\org\opentest4j\opentest4j\1.1.1\opentest4j-1.1.1.jar;C:\Users\michal\.m2\repository\org\junit\jupiter\junit-jupiter-api\5.3.2\junit-jupiter-api-5.3.2.jar;C:\Users\michal\.m2\repository\org\mockito\mockito-inline\3.6.28\mockito-inline-3.6.28.jar;C:\Users\michal\.m2\repository\org\mockito\mockito-core\3.6.28\mockito-core-3.6.28.jar;C:\Users\michal\.m2\repository\net\bytebuddy\byte-buddy\1.10.18\byte-buddy-1.10.18.jar;C:\Users\michal\.m2\repository\net\bytebuddy\byte-buddy-agent\1.10.18\byte-buddy-agent-1.10.18.jar;C:\Users\michal\.m2\repository\org\objenesis\objenesis\3.1\objenesis-3.1.jar;C:\Users\michal\.m2\repository\org\junit\platform\junit-platform-commons\1.4.1\junit-platform-commons-1.4.1.jar" com.intellij.rt.junit.JUnitStarter -ideVersion5 -junit5 EmployeeBaseTest,saveEmployeeTest
Apr 06, 2021 5:38:37 PM com.amazonaws.util.EC2MetadataUtils getItems
WARNING: Unable to retrieve the requested metadata (/latest/dynamic/instance-identity/document). Failed to connect to service endpoint: 
com.amazonaws.SdkClientException: Failed to connect to service endpoint: 
    at com.amazonaws.internal.EC2ResourceFetcher.doReadResource(EC2ResourceFetcher.java:100)
    at com.amazonaws.internal.EC2ResourceFetcher.doReadResource(EC2ResourceFetcher.java:70)
    at com.amazonaws.internal.InstanceMetadataServiceResourceFetcher.readResource(InstanceMetadataServiceResourceFetcher.java:75)
    at com.amazonaws.internal.EC2ResourceFetcher.readResource(EC2ResourceFetcher.java:66)
    at com.amazonaws.util.EC2MetadataUtils.getItems(EC2MetadataUtils.java:403)
    at com.amazonaws.util.EC2MetadataUtils.getData(EC2MetadataUtils.java:372)
    at com.amazonaws.util.EC2MetadataUtils.getData(EC2MetadataUtils.java:368)
    at com.amazonaws.util.EC2MetadataUtils.getEC2InstanceRegion(EC2MetadataUtils.java:283)
    at com.amazonaws.regions.InstanceMetadataRegionProvider.tryDetectRegion(InstanceMetadataRegionProvider.java:59)
    at com.amazonaws.regions.InstanceMetadataRegionProvider.getRegion(InstanceMetadataRegionProvider.java:50)
    at com.amazonaws.regions.AwsRegionProviderChain.getRegion(AwsRegionProviderChain.java:46)
    at com.amazonaws.client.builder.AwsClientBuilder.determineRegionFromRegionProvider(AwsClientBuilder.java:475)
    at com.amazonaws.client.builder.AwsClientBuilder.setRegion(AwsClientBuilder.java:458)
    at com.amazonaws.client.builder.AwsClientBuilder.configureMutableProperties(AwsClientBuilder.java:424)
    at com.amazonaws.client.builder.AwsSyncClientBuilder.build(AwsSyncClientBuilder.java:46)
    at com.amazonaws.services.dynamodbv2.AmazonDynamoDBClientBuilder.defaultClient(AmazonDynamoDBClientBuilder.java:53)
    at com.mw.workplanningservice.util.Constants.<clinit>(Constants.java:15)
    at com.mw.workplanningservice.service.EmployeeBase.saveEmployee(EmployeeBase.java:28)
    at EmployeeBaseTest.saveEmployeeTest(EmployeeBaseTest.java:34)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:628)
    at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:115)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:171)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:167)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:114)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:59)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:135)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
    at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
    at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
    at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:229)
    at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$6(DefaultLauncher.java:197)
    at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:211)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:191)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128)
    at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:71)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:220)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:53)
Caused by: java.net.SocketTimeoutException: connect timed out
    at java.base/java.net.PlainSocketImpl.waitForConnect(Native Method)
    at java.base/java.net.PlainSocketImpl.socketConnect(PlainSocketImpl.java:107)
    at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399)
    at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242)
    at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224)
    at java.base/java.net.Socket.connect(Socket.java:609)
    at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:177)
    at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:474)
    at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:569)
    at java.base/sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
    at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:341)
    at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:362)
    at java.base/sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1253)
    at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1232)
    at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1081)
    at java.base/sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:1015)
    at com.amazonaws.internal.ConnectionUtils.connectToEndpoint(ConnectionUtils.java:52)
    at com.amazonaws.internal.EC2ResourceFetcher.doReadResource(EC2ResourceFetcher.java:80)
    ... 69 more


java.lang.ExceptionInInitializerError
    at com.mw.workplanningservice.service.EmployeeBase.saveEmployee(EmployeeBase.java:28)
    at EmployeeBaseTest.saveEmployeeTest(EmployeeBaseTest.java:34)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:628)
    at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:115)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:171)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:167)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:114)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:59)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:135)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
    at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
    at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
    at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:229)
    at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$6(DefaultLauncher.java:197)
    at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:211)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:191)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128)
    at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:71)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:220)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:53)
Caused by: com.amazonaws.SdkClientException: Unable to find a region via the region provider chain. Must provide an explicit region in the builder or setup environment to supply a region.
    at com.amazonaws.client.builder.AwsClientBuilder.setRegion(AwsClientBuilder.java:462)
    at com.amazonaws.client.builder.AwsClientBuilder.configureMutableProperties(AwsClientBuilder.java:424)
    at com.amazonaws.client.builder.AwsSyncClientBuilder.build(AwsSyncClientBuilder.java:46)
    at com.amazonaws.services.dynamodbv2.AmazonDynamoDBClientBuilder.defaultClient(AmazonDynamoDBClientBuilder.java:53)
    at com.mw.workplanningservice.util.Constants.<clinit>(Constants.java:15)
    ... 53 more


Process finished with exit code -1

代码：

class EmployeeBaseTest {

    @Test
    void saveEmployeeTest() {
        try (MockedStatic<EmployeeUtils> mockedScope = Mockito.mockStatic(EmployeeUtils.class)) {
            mockedScope.when(EmployeeUtils::fetchEmployees).thenReturn(Collections.emptyList());
            var response = Mockito.mock(Response.class);
            var employeeBase = new EmployeeBase(response);
            employeeBase.saveEmployee(new Employee());
            assertEquals("TEST", response.getBody());
        }
    }
}

标签： javaamazon-web-servicesjunitmockito

Answer 1

我使用以下代码得到相同的结果。

class EmployeeBaseTest {
    @InjectMocks
    private EmployeeBase employeeBase;

    @Mock
    private Response response;

    @BeforeEach
    void beforeEach() {
        MockitoAnnotations.openMocks(this);
    }

    @Test
    void saveEmployeeTest() {
        try (MockedStatic<EmployeeUtils> mockedScope = Mockito.mockStatic(EmployeeUtils.class)) {
            mockedScope.when(EmployeeUtils::fetchEmployees).thenReturn(Collections.emptyList());
            Employee employee = new Employee();
            employeeBase.saveEmployee(employee);
            assertEquals("TEST", response.getBody());
        }
    }
}

我正在使用的依赖项。

        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <version>5.3.2</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.mockito</groupId>
            <artifactId>mockito-junit-jupiter</artifactId>
            <version>3.5.2</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.platform</groupId>
            <artifactId>junit-platform-commons</artifactId>
            <version>1.4.1</version>
            <scope>test</scope>
        </dependency>

当我尝试使用最新版本时：

        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <version>5.7.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.mockito</groupId>
            <artifactId>mockito-junit-jupiter</artifactId>
            <version>3.8.0</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.platform</groupId>
            <artifactId>junit-platform-commons</artifactId>
            <version>1.4.1</version>
            <scope>test</scope>
        </dependency>

然后我收到以下错误：

Apr 06, 2021 2:55:05 PM org.junit.platform.launcher.core.DefaultLauncher handleThrowable
WARNING: TestEngine with ID 'junit-vintage' failed to discover tests
org.junit.platform.commons.JUnitException: Unsupported version of junit:junit: 4.10. Please upgrade to version 4.12 or later.
    at org.junit.vintage.engine.JUnit4VersionCheck.checkSupported(JUnit4VersionCheck.java:49)
    at org.junit.vintage.engine.JUnit4VersionCheck.checkSupported(JUnit4VersionCheck.java:35)
    at org.junit.vintage.engine.VintageTestEngine.discover(VintageTestEngine.java:62)
    at org.junit.platform.launcher.core.DefaultLauncher.discoverEngineRoot(DefaultLauncher.java:177)
    at org.junit.platform.launcher.core.DefaultLauncher.discoverRoot(DefaultLauncher.java:164)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128)
    at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:71)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:220)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:53)

Apr 06, 2021 2:55:05 PM org.junit.platform.launcher.core.DefaultLauncher handleThrowable
WARNING: TestEngine with ID 'junit-jupiter' failed to discover tests
java.lang.NoSuchMethodError: 'org.junit.platform.engine.EngineDiscoveryListener org.junit.platform.engine.EngineDiscoveryRequest.getDiscoveryListener()'
    at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.resolveCompletely(EngineDiscoveryRequestResolution.java:88)
    at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolution.run(EngineDiscoveryRequestResolution.java:82)
    at org.junit.platform.engine.support.discovery.EngineDiscoveryRequestResolver.resolve(EngineDiscoveryRequestResolver.java:113)
    at org.junit.jupiter.engine.discovery.DiscoverySelectorResolver.resolveSelectors(DiscoverySelectorResolver.java:45)
    at org.junit.jupiter.engine.JupiterTestEngine.discover(JupiterTestEngine.java:69)
    at org.junit.platform.launcher.core.DefaultLauncher.discoverEngineRoot(DefaultLauncher.java:177)
    at org.junit.platform.launcher.core.DefaultLauncher.discoverRoot(DefaultLauncher.java:164)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128)
    at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:71)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:220)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:53)