我无法成功运行GWTTestCase测试。我正在使用GWT 2.6.1，JUnit 4.11，ant 1.8.2。我创建了示例repository on github。
Ant目标而不是运行测试（可能它在这里显而易见）：
<target name="test.gwt" depends="javac.test"
description="Run GWTTestCase tests." >
<junit haltonfailure="false" includeantruntime="false">
<sysproperty key="gwt.args" value="-prod -runStyle
HtmlUnit" />
<sysproperty key="gwt.persistentunitcachedir"
value="${gwt.cache.dir}" />
<classpath>
<pathelement location="${src.dir}" />
<pathelement location="${test.build.dir}" />
<path refid="project.class.path" />
</classpath>
<formatter type="brief" usefile="false" />
<test name="com.example.client.TestPerson" />
</junit>
</target>
我使用ant test.gwt运行测试，我得到的输出是：
test.gwt:
[junit] Testsuite: com.example.client.TestPerson
[junit] Tests run: 1, Failures: 0, Errors: 1, Time elapsed: 0.848 sec
[junit]
[junit] ------------- Standard Output ---------------
[junit] Loading inherited module 'com.example.Main'
[junit] [ERROR] Unexpected error while processing XML
[junit] java.lang.ClassCastException: org.apache.xerces.parsers.XIncludeAwareParserConfiguration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration
[junit] at org.apache.xerces.parsers.SAXParser.<init>(Unknown Source)
[junit] at org.apache.xerces.parsers.SAXParser.<init>(Unknown Source)
[junit] at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.<init>(Unknown Source)
[junit] at org.apache.xerces.jaxp.SAXParserImpl.<init>(Unknown Source)
[junit] at org.apache.xerces.jaxp.SAXParserFactoryImpl.newSAXParser(Unknown Source)
[junit] at com.google.gwt.dev.util.xml.ReflectiveParser.createNewSaxParser(ReflectiveParser.java:65)
[junit] at com.google.gwt.dev.util.xml.ReflectiveParser.access$000(ReflectiveParser.java:46)
[junit] at com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse(ReflectiveParser.java:343)
[junit] at com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$200(ReflectiveParser.java:68)
[junit] at com.google.gwt.dev.util.xml.ReflectiveParser.parse(ReflectiveParser.java:418)
[junit] at com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:333)
[junit] at com.google.gwt.dev.cfg.ModuleDefLoader$1.load(ModuleDefLoader.java:100)
[junit] at com.google.gwt.dev.cfg.ModuleDefLoader.doLoadModule(ModuleDefLoader.java:197)
[junit] at com.google.gwt.dev.cfg.ModuleDefLoader.doLoadModule(ModuleDefLoader.java:176)
[junit] at com.google.gwt.dev.cfg.ModuleDefLoader.createSyntheticModule(ModuleDefLoader.java:105)
[junit] at com.google.gwt.junit.CompileStrategy.maybeCompileModuleImpl2(CompileStrategy.java:165)
[junit] at com.google.gwt.junit.CompileStrategy.maybeCompileModuleImpl(CompileStrategy.java:112)
[junit] at com.google.gwt.junit.SimpleCompileStrategy.maybeCompileModule(SimpleCompileStrategy.java:36)
[junit] at com.google.gwt.junit.JUnitShell.runTestImpl(JUnitShell.java:1342)
[junit] at com.google.gwt.junit.JUnitShell.runTestImpl(JUnitShell.java:1311)
[junit] at com.google.gwt.junit.JUnitShell.runTest(JUnitShell.java:705)
[junit] at com.google.gwt.junit.client.GWTTestCase.runTest(GWTTestCase.java:421)
[junit] at junit.framework.TestCase.runBare(TestCase.java:130)
[junit] at junit.framework.TestResult$1.protect(TestResult.java:106)
[junit] at junit.framework.TestResult.runProtected(TestResult.java:124)
[junit] at junit.framework.TestResult.run(TestResult.java:109)
[junit] at junit.framework.TestCase.run(TestCase.java:120)
[junit] at com.google.gwt.junit.client.GWTTestCase.run(GWTTestCase.java:247)
[junit] at junit.framework.TestSuite.runTest(TestSuite.java:230)
[junit] at junit.framework.TestSuite.run(TestSuite.java:225)
[junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:518)
[junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.executeInVM(JUnitTask.java:1420)
[junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.execute(JUnitTask.java:848)
[junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.executeOrQueue(JUnitTask.java:1899)
[junit] at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.execute(JUnitTask.java:800)
[junit] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
[junit] at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
[junit] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[junit] at java.lang.reflect.Method.invoke(Method.java:616)
[junit] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
[junit] at org.apache.tools.ant.Task.perform(Task.java:348)
[junit] at org.apache.tools.ant.Target.execute(Target.java:390)
[junit] at org.apache.tools.ant.Target.performTasks(Target.java:411)
[junit] at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399)
[junit] at org.apache.tools.ant.Project.executeTarget(Project.java:1368)
[junit] at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
[junit] at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
[junit] at org.apache.tools.ant.Main.runBuild(Main.java:809)
[junit] at org.apache.tools.ant.Main.startAnt(Main.java:217)
[junit] at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
[junit] at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)
[junit] ------------- ---------------- ---------------
[junit] Testcase: testCreate(com.example.client.TestPerson): Caused an ERROR
[junit] (see previous log entries)
[junit] com.google.gwt.core.ext.UnableToCompleteException: (see previous log entries)
[junit] at com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad(ModuleDefLoader.java:336)
[junit] at com.google.gwt.dev.cfg.ModuleDefLoader$1.load(ModuleDefLoader.java:100)
[junit] at com.google.gwt.dev.cfg.ModuleDefLoader.doLoadModule(ModuleDefLoader.java:197)
[junit] at com.google.gwt.dev.cfg.ModuleDefLoader.doLoadModule(ModuleDefLoader.java:176)
[junit] at com.google.gwt.dev.cfg.ModuleDefLoader.createSyntheticModule(ModuleDefLoader.java:105)
[junit] at com.google.gwt.junit.CompileStrategy.maybeCompileModuleImpl2(CompileStrategy.java:165)
[junit] at com.google.gwt.junit.CompileStrategy.maybeCompileModuleImpl(CompileStrategy.java:112)
[junit] at com.google.gwt.junit.SimpleCompileStrategy.maybeCompileModule(SimpleCompileStrategy.java:36)
[junit] at com.google.gwt.junit.JUnitShell.runTestImpl(JUnitShell.java:1342)
[junit] at com.google.gwt.junit.JUnitShell.runTestImpl(JUnitShell.java:1311)
[junit] at com.google.gwt.junit.JUnitShell.runTest(JUnitShell.java:705)
[junit] at com.google.gwt.junit.client.GWTTestCase.runTest(GWTTestCase.java:421)
[junit] at com.google.gwt.junit.client.GWTTestCase.run(GWTTestCase.java:247)
[junit]
[junit]
[junit] Test com.example.client.TestPerson FAILED
BUILD SUCCESSFUL
Total time: 1 second
任何想法我可能做错了什么？我也试过JUnit 3.8 - 没有帮助。可能缺少.*jar个文件或不正确的版本？
答案 0 :(得分：1)
好的，我设法用GWTTestCase运行Ant测试。示例项目位于github。
首先，我切换到junit任务分叉模式。正如documentation所说，
一般情况下，建议分配新VM，因为它将测试与Ant的环境隔离（在类加载器中包含很多库，特别是与XML相关的类），但由于启动相关的开销很大，因此它变得非常慢新的Java VM。
当我添加[ERROR] Unexpected error while processing XML包（validation-api）时，我设法得到比ivy.xml更详细的错误：
<dependency org="javax.validation" name="validation-api" rev="1.0.0.GA" />
然后我很清楚我的测试中缺少GWT模块。所以我创建了一个（./test/com/example/MainTests.xml.gwt）：
<module rename-to="MainTests" >
<inherits name="com.example.Main" />
<source path="client" />
</module>
最终我不得不将测试模块路径添加到测试类路径（build.xml）：
<property name="test.src.dir" value="test" />
...
<junit haltonfailure="false" includeantruntime="false"
fork="true" forkmode="once" >
<classpath>
...
<pathelement location="${test.src.dir}" />
...
</classpath>
</junit>