如何測試GWT中的Generator？

Question

在GWT中，發電機的代碼位於rebind包中。該軟件包不包含在模塊xml文件中，因爲它可能包含非客戶端代碼。

這是我做的。我的模塊文件是/test/gwttest.gwt.xml。它包含以下內容：

<generate-with class="test.rebind.FunctionGenerator"> 
    <when-type-assignable class="test.client.Function" /> 
</generate-with> 

<source path='client'/> 

這裏是/測試/客戶機/功能：

public interface Function { 
    public Object execute(); 
} 

我Generator是/測試/重新綁定/函數發生器：

public class FunctionGenerator extends Generator { 
    private static final String IMPL_TYPE_NAME = Function.class.getSimpleName() 
      + "Impl"; 
    private static final String IMPL_PACKAGE_NAME = Function.class.getPackage() 
      .getName(); 

    @Override 
    public String generate(TreeLogger logger, GeneratorContext context, 
      String requestedClass) throws UnableToCompleteException { 
     TypeOracle typeOracle = context.getTypeOracle(); 
     JClassType functionType = typeOracle.findType(requestedClass); 
     assert Function.class.equals(functionType.getClass()); 

     ClassSourceFileComposerFactory composerFactory = new ClassSourceFileComposerFactory(
       IMPL_PACKAGE_NAME, IMPL_TYPE_NAME); 

     composerFactory.addImport(Function.class.getCanonicalName()); 
     composerFactory.addImplementedInterface(Function.class.getName()); 

     PrintWriter printWriter = context.tryCreate(logger, IMPL_PACKAGE_NAME, 
       IMPL_TYPE_NAME); 
     SourceWriter sourceWriter = composerFactory.createSourceWriter(context, 
       printWriter); 

     sourceWriter.print("public Object execute() {"); 
     sourceWriter.print(" return 1;"); 
     sourceWriter.print("}"); 

     sourceWriter.commit(logger); 
     return IMPL_PACKAGE_NAME + "." + IMPL_TYPE_NAME; 
    } 
} 

我GeneratorTest是/測試/ rebind/FunctionGeneratorTest：

public class FunctionGeneratorTest extends GWTTestCase { 

    @Override 
    public String getModuleName() { 
     return "com.acme.gwt.Generator"; 
    } 

    public void testGenerator() throws Exception { 
     Function function = GWT.create(Function.class); 
     assertNotNull(function); 
     assertEquals(1, function.execute()); 
    } 
} 

測試總是失敗，因爲這個錯誤：

com.google.gwt.junit.JUnitFatalLaunchException: The test class 'test.rebind.FunctionGeneratorTest' was not found in module 'test.Gwttest'; no compilation unit for that type was seen 
    at com.google.gwt.junit.JUnitShell.checkTestClassInCurrentModule(JUnitShell.java:766) 
    at com.google.gwt.junit.JUnitShell.runTestImpl(JUnitShell.java:1349) 
    at com.google.gwt.junit.JUnitShell.runTestImpl(JUnitShell.java:1311) 
    at com.google.gwt.junit.JUnitShell.runTest(JUnitShell.java:705) 
    at com.google.gwt.junit.client.GWTTestCase.runTest(GWTTestCase.java:421) 
    at junit.framework.TestCase.runBare(TestCase.java:141) 
    at junit.framework.TestResult$1.protect(TestResult.java:122) 
    at junit.framework.TestResult.runProtected(TestResult.java:142) 
    at junit.framework.TestResult.run(TestResult.java:125) 
    at junit.framework.TestCase.run(TestCase.java:129) 
    at com.google.gwt.junit.client.GWTTestCase.run(GWTTestCase.java:247) 
    at junit.framework.TestSuite.runTest(TestSuite.java:255) 
    at junit.framework.TestSuite.run(TestSuite.java:250) 
    at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:84) 
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) 
    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) 

我不能包括重新綁定的文件夾在我的模塊文件源，因爲它沒有客戶端的代碼。

我該怎麼辦？

當我將測試從/ test/rebind移動到/ test/client時，它適用於Eclipse Run as GWT Unit Test。

當我嘗試Eclipse Run as GWT Unit Test（生產模式）時，測試失敗。

這裏是跟蹤：

com.google.gwt.core.ext.UnableToCompleteException: (see previous log entries) 
    at com.google.gwt.junit.JUnitShell.compileForWebMode(JUnitShell.java:1125) 
    at com.google.gwt.junit.JUnitShell.maybeCompileForWebMode(JUnitShell.java:1174) 
    at com.google.gwt.junit.CompileStrategy.maybeCompileModuleImpl2(CompileStrategy.java:180) 
    at com.google.gwt.junit.CompileStrategy.maybeCompileModuleImpl(CompileStrategy.java:112) 
    at com.google.gwt.junit.SimpleCompileStrategy.maybeCompileModule(SimpleCompileStrategy.java:36) 
    at com.google.gwt.junit.JUnitShell.runTestImpl(JUnitShell.java:1342) 
    at com.google.gwt.junit.JUnitShell.runTestImpl(JUnitShell.java:1311) 
    at com.google.gwt.junit.JUnitShell.runTest(JUnitShell.java:705) 
    at com.google.gwt.junit.client.GWTTestCase.runTest(GWTTestCase.java:421) 
    at junit.framework.TestCase.runBare(TestCase.java:141) 
    at junit.framework.TestResult$1.protect(TestResult.java:122) 
    at junit.framework.TestResult.runProtected(TestResult.java:142) 
    at junit.framework.TestResult.run(TestResult.java:125) 
    at junit.framework.TestCase.run(TestCase.java:129) 
    at com.google.gwt.junit.client.GWTTestCase.run(GWTTestCase.java:247) 
    at junit.framework.TestSuite.runTest(TestSuite.java:255) 
    at junit.framework.TestSuite.run(TestSuite.java:250) 
    at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:84) 
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) 
    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) 

爲什麼測試在生產模式失敗，並將在開發模式？

Answer 1

請參閱此鏈接：https://groups.google.com/forum/#!topic/google-web-toolkit/OyH839KEH-w

這將有助於使生產代碼的工作：

PrintWriter printWriter = context.tryCreate(logger, IMPL_PACKAGE_NAME, IMPL_TYPE_NAME); 
if (printWriter != null) { 
.... 
} 
return IMPL_PACKAGE_NAME + "." + IMPL_TYPE_NAME;