unit-testing - GWT JUnit 测试

Question

我正在尝试对 GWT 进行非常 JUnit 测试，但它失败了

public class CheckTest extends TestCase
{

    private ServiceAsync RPC;
    private HandlerManager EventBus;
    private CreateTopicPresenter.Display CTV;
    private CreateTopicPresenter CTP;

    protected void setUp() 
    {
        RPC= createStrictMock(ServiceAsync.class);
        EventBus = new HandlerManager(null);
        CTV= createStrictMock(CreateTopicView.class);
        CTP= new CreateTopicPresenter(CTV,RPC,EventBus);
    }
    public void testCheck()
    {

        CTP.View.getFirstMessage().setValue("MessageTest");
        assertTrue(CTP.View.getFirstMessage().getValue().equals("MessageTest"));
    }

堆栈跟踪:

 java.lang.ExceptionInInitializerError
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at net.sf.cglib.proxy.Enhancer.setCallbacksHelper(Enhancer.java:619)
        at net.sf.cglib.proxy.Enhancer.setThreadCallbacks(Enhancer.java:612)
        at net.sf.cglib.proxy.Enhancer.registerCallbacks(Enhancer.java:581)
        at org.easymock.internal.ClassProxyFactory.createProxy(ClassProxyFactory.java:194)
        at org.easymock.internal.MocksControl.createMock(MocksControl.java:60)
        at org.easymock.EasyMock.createStrictMock(EasyMock.java:70)
        at com.BiddingSystem.client.CheckTest.setUp(CheckTest.java:26)
        at junit.framework.TestCase.runBare(TestCase.java:128)
        at junit.framework.TestResult$1.protect(TestResult.java:106)
        at junit.framework.TestResult.runProtected(TestResult.java:124)
        at junit.framework.TestResult.run(TestResult.java:109)
        at junit.framework.TestCase.run(TestCase.java:120)
        at junit.framework.TestSuite.runTest(TestSuite.java:230)
        at junit.framework.TestSuite.run(TestSuite.java:225)
        at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
        at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
    Caused by: java.lang.UnsupportedOperationException: ERROR: GWT.create() is only usable in client code!  It cannot be called, for example, from server code.  If you are running a unit test, check that your test case extends GWTTestCase and that GWT.create() is not called from within an initializer or constructor.
        at com.google.gwt.core.client.GWT.create(GWT.java:91)
        at com.google.gwt.user.client.ui.UIObject.<clinit>(UIObject.java:188)
        ... 24 more

Answer 1

您需要扩展 GWTTestCase 基类型以测试依赖于 GWT 运行时的代码(例如调用 GWT.create() 或 JSNI 方法)。请注意，GWTTestCase 也必须与 GWT 兼容，因此这将限制您对测试库的选择。

理想情况下，您的大部分应用程序代码都可以使用“纯”TestCases 进行测试，而 GWTTestCases 只测试特定于客户端的代码，因为后者具有更高的开销。

http://www.gwtproject.org/articles/testing_methodologies_using_gwt.html