testing - GWT测试报错NoClassDefFoundError : com/google/gwt/dev/cfg/Condition

Question

也许有人可以帮助我，我正在尝试编写我的第一个 gwt 单元测试，但这就是问题所在，当我使用 maven 运行测试时出现此错误:

>  java.lang.NoClassDefFoundError: com/google/gwt/dev/cfg/Condition     at
> com.google.gwt.junit.client.GWTTestCase.createStrategy(GWTTestCase.java:340)
>   at
> com.google.gwt.junit.client.GWTTestCase.getStrategy(GWTTestCase.java:257)
>   at
> com.google.gwt.junit.client.GWTTestCase.getSyntheticModuleName(GWTTestCase.java:275)
>   at
> com.google.gwt.junit.client.GWTTestCase.setName(GWTTestCase.java:321)
>   at junit.framework.TestSuite.createTest(TestSuite.java:63)  at
> junit.framework.TestSuite.addTestMethod(TestSuite.java:283)   at
> junit.framework.TestSuite.<init>(TestSuite.java:146)    at
> org.junit.internal.runners.JUnit38ClassRunner.<init>(JUnit38ClassRunner.java:71)
>   at
> org.junit.internal.builders.JUnit3Builder.runnerForClass(JUnit3Builder.java:14)
>   at
> org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57)
>   at
> org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:29)
>   at
> org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:57)
>   at
> org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:24)
>   at
> org.apache.maven.surefire.junit4.JUnit4TestSet.<init>(JUnit4TestSet.java:45)
>   at
> org.apache.maven.surefire.junit4.JUnit4DirectoryTestSuite.createTestSet(JUnit4DirectoryTestSuite.java:56)
>   at
> org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.locateTestSets(AbstractDirectoryTestSuite.java:96)
>   at
> org.apache.maven.surefire.Surefire.createSuiteFromDefinition(Surefire.java:209)
>   at org.apache.maven.surefire.Surefire.run(Surefire.java:156)    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:601)     at
> org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:345)
>   at
> org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:1009)
> Caused by: java.lang.ClassNotFoundException:
> com.google.gwt.dev.cfg.Condition  at
> java.net.URLClassLoader$1.run(URLClassLoader.java:366)    at
> java.net.URLClassLoader$1.run(URLClassLoader.java:355)    at
> java.security.AccessController.doPrivileged(Native Method)    at
> java.net.URLClassLoader.findClass(URLClassLoader.java:354)    at
> java.lang.ClassLoader.loadClass(ClassLoader.java:423)     at
> sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)     at
> java.lang.ClassLoader.loadClass(ClassLoader.java:356)

这是我的测试用例:

public class TelekanalServiceImplTest extends GWTTestCase {

    @Override
    public String getModuleName() {
        // TODO Auto-generated method stub
        return "com.karq.tvkava.tvkavaJUnit";
    }



    public void testTelekanalService(){
        // Create the service that we will test.
        TelekanalServiceAsync telekanalService = GWT.create(TelekanalService.class);
        ServiceDefTarget target = (ServiceDefTarget) telekanalService;
        target.setServiceEntryPoint(GWT.getModuleBaseURL() + "tvkava/telekanalService");

        // Since RPC calls are asynchronous, we will need to wait for a response
        // after this test method returns. This line tells the test runner to wait
        // up to 10 seconds before timing out.
        delayTestFinish(10000);
        //Test data
        Telekanal telekanal = new Telekanal();
        telekanal.setNimetus("test");
        telekanal.setKirjeldus("see on test");
        // Send a request to the server.
        telekanalService.saveOrUpdateTelekanal(telekanal, new AsyncCallback<Void>() {
          public void onFailure(Throwable caught) {
            // The request resulted in an unexpected error.
            fail("Request failure: " + caught.getMessage());
          }

          public void onSuccess(Void result) {
            // Verify that the response is correct.
            boolean isSaved = true;
            assertTrue(isSaved);
            // Now that we have received a response, we need to tell the test runner
            // that the test is complete. You must call finishTest() after an
            // asynchronous test finishes successfully, or the test will time out.
            finishTest();
          }
        });
    }

}

在 com.karq.tvkava 中我有一个名为 tvKavaJUnit.gwt.xml 的模块文件

<?xml version="1.0" encoding="UTF-8"?>
<module>
  <!-- Inherit our applications main module.                      -->
  <inherits name='com.karq.tvkava.tvkava'/>

  <!-- Specify the path to any remote services.                   -->
  <servlet path="/tvkava/telekanalService" class="com.karq.tvkava.server.services.TelekanalServiceImpl" />

</module>

当然，我在 com.karq.tvkava 中有主模块，它叫做 tvkava.gwt.xml

<?xml version="1.0" encoding="UTF-8"?>
<module rename-to='tvkava'>
  <!-- Inherit the core Web Toolkit stuff.                        -->
  <inherits name='com.google.gwt.user.User'/>

  <!-- Inherit the default GWT style sheet.  You can change       -->
  <!-- the theme of your GWT application by uncommenting          -->
  <!-- any one of the following lines.                            -->
  <inherits name='com.google.gwt.user.theme.standard.Standard'/>
  <!-- <inherits name='com.google.gwt.user.theme.chrome.Chrome'/> -->
  <!-- <inherits name='com.google.gwt.user.theme.dark.Dark'/>     -->

  <!-- Other module inherits                                      -->
<inherits name='net.sf.gilead.Gilead4Gwt'/>
<source path='client/service' />
  <source path='shared'/>
  <!-- Specify the app entry point class.                         -->
  <entry-point class='com.karq.tvkava.client.tvkava'/>

  <!-- Specify the paths for translatable code                    -->
  <source path='client'/>
  <source path='shared'/>

</module>

Answer 1

我设法让 Surefire 与我的 GWT 测试无缝协作，输出正确的结果并在测试失败时使构建失败。在我的 POM 中，我已经像这样设置了 Surefire:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-surefire-plugin</artifactId>
    <version>2.12</version>
    <configuration>
        <additionalClasspathElements>
            <additionalClasspathElement>${project.build.sourceDirectory}</additionalClasspathElement>
            <additionalClasspathElement>${project.build.testSourceDirectory}</additionalClasspathElement>
        </additionalClasspathElements>
        <useSystemClassLoader>true</useSystemClassLoader>
        <useManifestOnlyJar>false</useManifestOnlyJar>
        <forkMode>always</forkMode>
        <systemProperties>
            <property>
                <name>gwt.args</name>
                <value>-out www-test</value>
            </property>
        </systemProperties>
    </configuration>
</plugin>

您需要定义变量 project.build.sourceDirectory和 project.build.testSourceDirectory .对我来说，它们类似于 <project-name>/src/main/java和 <project-name>/src/test/java .

我还必须添加对 gwt-dev 的依赖:

<dependency>
    <groupId>com.google.gwt</groupId>
    <artifactId>gwt-dev</artifactId>
    <version>2.4.0</version>
    <scope>provided</scope>
</dependency>