JUnit 5 测试 MockMvc 为空

【问题标题】：JUnit 5 testing MockMvc is nullJUnit 5 测试 MockMvc 为空
【发布时间】：2021-04-30 09:32:32
【问题描述】：

我正在尝试测试我的第 3 年项目，但我的 mockMvc 不断收到空指针异常。下面是完整的堆栈跟踪。

java.lang.NoSuchMethodError: 'void org.springframework.util.Assert.state(boolean, java.util.function.Supplier)'
at org.springframework.test.context.support.AbstractTestContextBootstrapper.buildMergedContextConfiguration(AbstractTestContextBootstrapper.java:379)
at org.springframework.test.context.support.AbstractTestContextBootstrapper.buildDefaultMergedContextConfiguration(AbstractTestContextBootstrapper.java:312)
at org.springframework.test.context.support.AbstractTestContextBootstrapper.buildMergedContextConfiguration(AbstractTestContextBootstrapper.java:265)
at org.springframework.test.context.support.AbstractTestContextBootstrapper.buildTestContext(AbstractTestContextBootstrapper.java:108)
at org.springframework.boot.test.context.SpringBootTestContextBootstrapper.buildTestContext(SpringBootTestContextBootstrapper.java:78)
at org.springframework.test.context.TestContextManager.<init>(TestContextManager.java:139)
at org.springframework.test.context.TestContextManager.<init>(TestContextManager.java:124)
at org.junit.jupiter.engine.execution.ExtensionValuesStore.lambda$getOrComputeIfAbsent$0(ExtensionValuesStore.java:81)
at org.junit.jupiter.engine.execution.ExtensionValuesStore$MemoizingSupplier.get(ExtensionValuesStore.java:182)
at org.junit.jupiter.engine.execution.ExtensionValuesStore.getOrComputeIfAbsent(ExtensionValuesStore.java:84)
at org.junit.jupiter.engine.execution.ExtensionValuesStore.getOrComputeIfAbsent(ExtensionValuesStore.java:88)
at org.junit.jupiter.engine.execution.NamespaceAwareStore.getOrComputeIfAbsent(NamespaceAwareStore.java:61)
at org.springframework.test.context.junit.jupiter.SpringExtension.getTestContextManager(SpringExtension.java:202)
at org.springframework.test.context.junit.jupiter.SpringExtension.beforeAll(SpringExtension.java:76)
at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeBeforeAllCallbacks$7(ClassBasedTestDescriptor.java:359)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeBeforeAllCallbacks(ClassBasedTestDescriptor.java:359)
at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.before(ClassBasedTestDescriptor.java:189)
at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.before(ClassBasedTestDescriptor.java:78)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:132)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$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$8(NodeTestTask.java:123)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$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$8(NodeTestTask.java:123)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:248)
at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$5(DefaultLauncher.java:211)
at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:226)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:199)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:141)
at org.eclipse.jdt.internal.junit5.runner.JUnit5TestReference.run(JUnit5TestReference.java:98)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:542)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:770)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:464)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210)
Suppressed: java.lang.NoSuchMethodError: 'void org.springframework.util.Assert.state(boolean, java.util.function.Supplier)'
    at org.springframework.test.context.support.AbstractTestContextBootstrapper.buildMergedContextConfiguration(AbstractTestContextBootstrapper.java:379)
    at org.springframework.test.context.support.AbstractTestContextBootstrapper.buildDefaultMergedContextConfiguration(AbstractTestContextBootstrapper.java:312)
    at org.springframework.test.context.support.AbstractTestContextBootstrapper.buildMergedContextConfiguration(AbstractTestContextBootstrapper.java:265)
    at org.springframework.test.context.support.AbstractTestContextBootstrapper.buildTestContext(AbstractTestContextBootstrapper.java:108)
    at org.springframework.boot.test.context.SpringBootTestContextBootstrapper.buildTestContext(SpringBootTestContextBootstrapper.java:78)
    at org.springframework.test.context.TestContextManager.<init>(TestContextManager.java:139)
    at org.springframework.test.context.TestContextManager.<init>(TestContextManager.java:124)
    at org.junit.jupiter.engine.execution.ExtensionValuesStore.lambda$getOrComputeIfAbsent$0(ExtensionValuesStore.java:81)
    at org.junit.jupiter.engine.execution.ExtensionValuesStore$MemoizingSupplier.get(ExtensionValuesStore.java:182)
    at org.junit.jupiter.engine.execution.ExtensionValuesStore.remove(ExtensionValuesStore.java:98)
    at org.junit.jupiter.engine.execution.NamespaceAwareStore.remove(NamespaceAwareStore.java:73)
    at org.springframework.test.context.junit.jupiter.SpringExtension.afterAll(SpringExtension.java:88)
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeAfterAllCallbacks$13(ClassBasedTestDescriptor.java:425)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeAfterAllCallbacks$14(ClassBasedTestDescriptor.java:425)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeAfterAllCallbacks(ClassBasedTestDescriptor.java:425)
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.after(ClassBasedTestDescriptor.java:213)
    at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.after(ClassBasedTestDescriptor.java:78)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:145)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:145)
    ... 29 more

下面是我的所有导入测试的代码：

package c03xxx.test;
  import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
  import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

   import org.junit.jupiter.api.Test;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
  import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.test.web.servlet.MockMvc;

 import CO3102.hw2.domain.User;

 @ExtendWith(SpringExtension.class)
 @AutoConfigureMockMvc
 @SpringBootTest
 class Tests {

@Autowired
private MockMvc mockMvc;
 @Test
   public void testSignUp() throws Exception{
    User u = new User();
    u.setDob("31/12/1999");
    u.setEmail("testEmail@le.ac.uk");
    u.setFav_team("Liverpool");
    u.setNumber_of_friends(0);
    u.setPassword("123456");
    u.setUsername("TESTUSERNAME");
    this.mockMvc.perform(get("/newUser"))
    .andExpect(status().isCreated());
}

注意：我尝试过使用 SpringRunner.class - 但即使在相关依赖项添加到我的 build.gradle 之后，它也不能正常工作。如果您需要查看我的依赖项，我可以添加它们。非常感谢您花时间阅读我的问题。

更新：所以现在我收到了一个我在上面更新的错误。下面是我的 build.gradle！

dependencies {
compile("org.springframework.boot:spring-boot-starter-data-jpa")
compile("javax.servlet:jstl:1.2")
compile group: 'javax.servlet', name: 'jstl', version: '1.2'
implementation 'org.springframework.boot:spring-boot-starter-security'
implementation 'org.springframework.security:spring-security-test'
compile group: 'org.springframework.security', name: 'spring-security- 
  crypto', version: '5.4.2'
 compile("org.springframework.boot:spring-boot-starter-mail")
compile group: 'mysql', name: 'mysql-connector-java', version: '8.0.11'
compile group: 'javax.servlet', name: 'jstl', version: '1.2'
runtime("mysql:mysql-connector-java")
compile("org.springframework.boot:spring-boot-starter-jdbc")
compile ("org.springframework.boot:spring-boot-starter-web") 
compile group: 'com.qasymphony.qtest', name: 'qtest-sdk-java', version: '1.4.7'    
compile("org.apache.tomcat.embed:tomcat-embed-jasper")
compile group: 'org.glassfish.jaxb', name: 'jaxb-runtime', version: '2.3.3'
providedRuntime("org.springframework.boot:spring-boot-starter-tomcat")
providedRuntime 'org.apache.tomcat.embed:tomcat-embed-jasper'
compile group: 'tangrammer', name: 'java-net-http-client', version: '0.1.2'
 implementation 'com.squareup.okhttp3:okhttp:3.14.6'
 compile group: 'com.google.code.gson', name: 'gson', version: '2.8.5'
 testImplementation('org.springframework.boot:spring-boot-starter-test') {
    exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
    
}
compile group: 'org.springframework', name: 'spring-test', version: 
  '5.1.0.RELEASE'
  implementation 'org.springframework.boot:spring-boot-starter-data-jpa
  compile group: 'org.springframework.boot', name: 'spring-boot-test-

自动配置，版本：'1.5.1.RELEASE'

}

【问题讨论】：

  • 代码看起来不错，可能依赖项不匹配 - 请向我们展示您的 pom / build.gradle 文件
  • 我现在已经解决了这个问题，但是我得到了一个没有这样的方法错误。我将更新问题并显示我的 build.gradle

标签： java spring testing junit mockmvc


【解决方案1】：

NoSuchMethodError 是依赖项冲突的标志。

在你的情况下，删除：

compile group: 'org.springframework', name: 'spring-test', version: '5.1.0.RELEASE'
compile group: 'org.springframework.boot', name: 'spring-boot-test-autoconfigure', version: '1.5.1.RELEASE'

两者都被spring-boot-starter-test 引入，这已经是你依赖的一部分了。

【讨论】：

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