Rest Dropwizard测试-javax.validation.ConstraintViolationException:请求实体为空

我正在用Dropwizard 0.7为REST服务编写集成测试。我正在关注Dropwizard文档 我正在尝试使用io.dropwizard.testing库测试简单get请求

    <dependency>
        <groupId>io.dropwizard</groupId>
        <artifactId>dropwizard-testing</artifactId>
        <version>0.7.1</version>
    </dependency>

我得到的是成功连接到db，我得到了正确的令牌，异常是：

Test  c.s.j.s.c.ContainerResponse:419 [main] - The RuntimeException could not be mapped to a response, re-throwing to the HTTP container
javax.validation.ConstraintViolationException: The request entity was empty
    at io.dropwizard.jersey.jackson.JacksonMessageBodyProvider.validate(JacksonMessageBodyProvider.java:70) ~[dropwizard-jersey-0.7.0.jar:0.7.0]
    at io.dropwizard.jersey.jackson.JacksonMessageBodyProvider.readFrom(JacksonMessageBodyProvider.java:60) ~[dropwizard-jersey-0.7.0.jar:0.7.0]
    at com.sun.jersey.spi.container.ContainerRequest.getEntity(ContainerRequest.java:490) ~[jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.model.method.dispatch.EntityParamDispatchProvider$EntityInjectable.getValue(EntityParamDispatchProvider.java:123) ~[jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.inject.InjectableValuesProvider.getInjectableValues(InjectableValuesProvider.java:86) ~[jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$EntityParamInInvoker.getParams(AbstractResourceMethodDispatchProvider.java:153) ~[jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:183) ~[jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75) ~[jersey-server-1.18.1.jar:1.18.1]
    at io.dropwizard.jersey.guava.OptionalResourceMethodDispatchAdapter$OptionalRequestDispatcher.dispatch(OptionalResourceMethodDispatchAdapter.java:37) ~[dropwizard-jersey-0.7.0.jar:0.7.0]
    at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302) ~[jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) ~[jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.uri.rules.ResourceObjectRule.accept(ResourceObjectRule.java:100) ~[jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) ~[jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84) ~[jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1542) [jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1473) [jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419) [jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.test.framework.impl.container.inmemory.TestResourceClientHandler.handle(TestResourceClientHandler.java:119) [jersey-test-framework-inmemory-1.18.1.jar:1.18.1]
    at com.sun.jersey.api.client.Client.handle(Client.java:652) [jersey-client-1.18.1.jar:1.18.1]
    at com.sun.jersey.api.client.WebResource.handle(WebResource.java:682) [jersey-client-1.18.1.jar:1.18.1]
    at com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74) [jersey-client-1.18.1.jar:1.18.1]
    at com.sun.jersey.api.client.WebResource$Builder.get(WebResource.java:509) [jersey-client-1.18.1.jar:1.18.1]
    at com.zh.backend.resources.PackageResourceTest.testGetPerson(PackageResourceTest.java:122) [test-classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_55]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_55]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_55]
    at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_55]
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) [junit-4.11.jar:na]
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) [junit-4.11.jar:na]
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) [junit-4.11.jar:na]
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) [junit-4.11.jar:na]
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) [junit-4.11.jar:na]
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271) [junit-4.11.jar:na]
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70) [junit-4.11.jar:na]
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) [junit-4.11.jar:na]
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) [junit-4.11.jar:na]
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) [junit-4.11.jar:na]
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) [junit-4.11.jar:na]
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) [junit-4.11.jar:na]
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) [junit-4.11.jar:na]
    at io.dropwizard.testing.junit.ResourceTestRule$1.evaluate(ResourceTestRule.java:150) [dropwizard-testing-0.7.1.jar:0.7.1]
    at org.junit.rules.RunRules.evaluate(RunRules.java:20) [junit-4.11.jar:na]
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309) [junit-4.11.jar:na]
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) [.cp/:na]
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) [.cp/:na]
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) [.cp/:na]
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675) [.cp/:na]
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) [.cp/:na]
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192) [.cp/:na]

---

当然，我在传递参数时出错了，但我找不到什么，你能帮我吗？

我遇到了很多类似的问题，我刚刚找到了修复方法，希望在这里也能有所帮助

在我的例子中，“ConstraintViolationException:请求实体在处为空”异常的原因是，当构建资源模拟时，它会运行所有注释，并将它们与预期的注释映射进行比较。它们都不是@SessionAuth或@Auth（我正在使用），因此默认情况下，它假定注释必须意味着其相关参数是实体。在get请求的情况下，没有实体，因此它会爆炸

解决方案似乎是在ResourceTestRule生成器中调用.addProvider，这样它就可以查找一个解释注释的方法。例如，我必须做：

    @Rule
        public final ResourceTestRule resources = ResourceTestRule.builder()
                .addResource(new GroupSuggestionsResourceV1(RANKING_STORE, CLIENT))
                .addProvider(new OAuthProvider<>(AUTHENTICATOR, "test-realm"))
                .build();

@规则
public final ResourceTestRule resources=ResourceTestRule.builder（）
.addResource（新的GroupSuggestionResourceV1（排名商店、客户））
.addProvider（新的OAuthProvider（验证器，“测试域”））
.build（）；

它告诉资源构建器需要一个auth注释，并适当地处理它。起初我只是在做.addProvider（AUTHENTICATOR），但这不起作用，所以如果您遇到问题，您可能希望同时尝试这两种方法

---

我希望这能帮助其他人解决这个问题

调用GET方法时，是否有方法将参数传递给它？因为当我从要测试的方法中删除用户参数时，一切似乎都正常工作。如何将此参数传递给正在测试的方法？

Test  c.s.j.s.c.ContainerResponse:419 [main] - The RuntimeException could not be mapped to a response, re-throwing to the HTTP container
javax.validation.ConstraintViolationException: The request entity was empty
    at io.dropwizard.jersey.jackson.JacksonMessageBodyProvider.validate(JacksonMessageBodyProvider.java:70) ~[dropwizard-jersey-0.7.0.jar:0.7.0]
    at io.dropwizard.jersey.jackson.JacksonMessageBodyProvider.readFrom(JacksonMessageBodyProvider.java:60) ~[dropwizard-jersey-0.7.0.jar:0.7.0]
    at com.sun.jersey.spi.container.ContainerRequest.getEntity(ContainerRequest.java:490) ~[jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.model.method.dispatch.EntityParamDispatchProvider$EntityInjectable.getValue(EntityParamDispatchProvider.java:123) ~[jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.inject.InjectableValuesProvider.getInjectableValues(InjectableValuesProvider.java:86) ~[jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$EntityParamInInvoker.getParams(AbstractResourceMethodDispatchProvider.java:153) ~[jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:183) ~[jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75) ~[jersey-server-1.18.1.jar:1.18.1]
    at io.dropwizard.jersey.guava.OptionalResourceMethodDispatchAdapter$OptionalRequestDispatcher.dispatch(OptionalResourceMethodDispatchAdapter.java:37) ~[dropwizard-jersey-0.7.0.jar:0.7.0]
    at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302) ~[jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) ~[jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.uri.rules.ResourceObjectRule.accept(ResourceObjectRule.java:100) ~[jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) ~[jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84) ~[jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1542) [jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1473) [jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419) [jersey-server-1.18.1.jar:1.18.1]
    at com.sun.jersey.test.framework.impl.container.inmemory.TestResourceClientHandler.handle(TestResourceClientHandler.java:119) [jersey-test-framework-inmemory-1.18.1.jar:1.18.1]
    at com.sun.jersey.api.client.Client.handle(Client.java:652) [jersey-client-1.18.1.jar:1.18.1]
    at com.sun.jersey.api.client.WebResource.handle(WebResource.java:682) [jersey-client-1.18.1.jar:1.18.1]
    at com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74) [jersey-client-1.18.1.jar:1.18.1]
    at com.sun.jersey.api.client.WebResource$Builder.get(WebResource.java:509) [jersey-client-1.18.1.jar:1.18.1]
    at com.zh.backend.resources.PackageResourceTest.testGetPerson(PackageResourceTest.java:122) [test-classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_55]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_55]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_55]
    at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_55]
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) [junit-4.11.jar:na]
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) [junit-4.11.jar:na]
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) [junit-4.11.jar:na]
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) [junit-4.11.jar:na]
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) [junit-4.11.jar:na]
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271) [junit-4.11.jar:na]
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70) [junit-4.11.jar:na]
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) [junit-4.11.jar:na]
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) [junit-4.11.jar:na]
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) [junit-4.11.jar:na]
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) [junit-4.11.jar:na]
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) [junit-4.11.jar:na]
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) [junit-4.11.jar:na]
    at io.dropwizard.testing.junit.ResourceTestRule$1.evaluate(ResourceTestRule.java:150) [dropwizard-testing-0.7.1.jar:0.7.1]
    at org.junit.rules.RunRules.evaluate(RunRules.java:20) [junit-4.11.jar:na]
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309) [junit-4.11.jar:na]
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) [.cp/:na]
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) [.cp/:na]
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) [.cp/:na]
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675) [.cp/:na]
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) [.cp/:na]
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192) [.cp/:na]

    @Rule
        public final ResourceTestRule resources = ResourceTestRule.builder()
                .addResource(new GroupSuggestionsResourceV1(RANKING_STORE, CLIENT))
                .addProvider(new OAuthProvider<>(AUTHENTICATOR, "test-realm"))
                .build();