使用querydsl嘲笑db查詢 - 問題與可選

Question

我的應用程序的數據庫查詢編寫測試時遇到了一些困難，該應用程序在mongo上使用querydsl。我發現了幾個人只是單元測試查詢對象本身的例子，但我想更進一步，並測試查詢如何執行（如集成測試），但無需啓動整個數據庫進程。也就是說，只用java工具嘲笑數據庫。

我找不到任何東西，DBUnit或DbSetup等工具需要實際連接到數據庫。所以我開始寫我自己的課程，它幾乎可行。這個想法是使用com.mysema.query.collections.CollQuery和mockito來模擬一個數據庫，該數據庫可以接收我的應用程序的查詢，並使用包裝器「CollQuery to Query」。基本上，它是這樣的：

public class MyServiceTest { 

    private MyService service; 
    private final Collection<MyObject> fakeTable = new ArrayList<>(); 

    @Before 
    public void setup() { 

     final Persister persister = mock(Persister.class); 
     when(persister.query(any(Class.class))) 
       // MockedQuery is the wrapper I wrote 
       .thenReturn(new MockedQuery<>(QMyObject.myObject, fakeTable)); 

     service = new MyService(persister); 
    } 

    @Test 
    public void shouldWork() { 
     fakeTable.add(new MyObject("one")); 
     fakeTable.add(new MyObject("two")); 
     fakeTable.add(new MyObject("three")); 

     final List<MyObject> result = service.getOne(); 
     // service.getOne would do something like: 
     // persister.query(QMyObject.myObject).where(QMyObject.myObject.name.eq("one")).list() 

     assertThat(result).hasSize(1); 
    } 
} 

...基本上，它似乎工作！除了我的代碼大量使用番石榴的Optional，並且它似乎是querydsl的一個問題。如果，而不是字符串，爲MyObject有一個可選的<字符串>，然後我得到的錯誤：

com.mysema.codegen.CodegenException: Compilation of public class  Q_01363784216_1275614662_1275614662_1573163836_01698119955_566403833 { 

    public static Iterable<xxx.OpenedInterruption> eval(Iterable<xxx.OpenedInterruption> openedInterruption_, xxx.InterruptionType a1, xxx.InterruptionTargetType a2, com.google.common.base.Present a3) { 
     java.util.List<xxx.OpenedInterruption> rv = new java.util.ArrayList<xxx.OpenedInterruption>(); 
     for (xxx.OpenedInterruption openedInterruption : openedInterruption_) { 
      try { 
       if (com.mysema.query.collections.CollQueryFunctions.equals(com.mysema.query.collections.CollQueryFunctions.<xxx.InterruptionType>get(openedInterruption, "type"), a1) && com.mysema.query.collections.CollQueryFunctions.equals(com.mysema.query.collections.CollQueryFunctions.<xxx.InterruptionTargetType>get(openedInterruption, "targetType"), a2) && com.mysema.query.collections.CollQueryFunctions.equals(com.mysema.query.collections.CollQueryFunctions.<com.google.common.base.Optional>get(openedInterruption, "target"), a3)) { 
        rv.add(openedInterruption); 
       } 
      } catch (NullPointerException npe) { } 
     } 
     return rv; } 

} 

failed. 
     /Q_01363784216_1275614662_1275614662_1573163836_01698119955_566403833.java:3: error: Present is not public in com.google.common.base; cannot be accessed from outside package 
public static Iterable<xxx.OpenedInterruption> eval(Iterable<xxx.OpenedInterruption> openedInterruption_, xxx.InterruptionType a1, xxx.InterruptionTargetType a2, com.google.common.base.Present a3) { 
     ^
     1 error 

     at com.mysema.codegen.JDKEvaluatorFactory.compile(JDKEvaluatorFactory.java:74) 
     at com.mysema.codegen.AbstractEvaluatorFactory.createEvaluator(AbstractEvaluatorFactory.java:128) 
     at com.mysema.query.collections.DefaultEvaluatorFactory.createEvaluator(DefaultEvaluatorFactory.java:157) 
     at com.mysema.query.collections.DefaultQueryEngine.evaluateSingleSource(DefaultQueryEngine.java:176) 
     at com.mysema.query.collections.DefaultQueryEngine.list(DefaultQueryEngine.java:91) 
     at com.mysema.query.collections.AbstractCollQuery.list(AbstractCollQuery.java:219) 
     at xxx.BusinessInterruptionServiceImplTest$MockedQuery.list(BusinessInterruptionServiceImplTest.java:143) 
     at xxx.BusinessInterruptionServiceImplTest.setup(BusinessInterruptionServiceImplTest.java:79) 
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
     at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) 
     at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) 
     at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) 
     at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24) 
     at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271) 
     at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70) 
     at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) 
     at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) 
     at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) 
     at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) 
     at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) 
     at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) 
     at org.junit.runners.ParentRunner.run(ParentRunner.java:309) 
     at org.junit.runner.JUnitCore.run(JUnitCore.java:160) 
     at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:74) 
     at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:211) 
     at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:67) 
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
     at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134) 

所以，它看起來像mysema試圖實例化com.google.common.base.Present，但無法這樣做。奇怪的部分是，相同的查詢完全符合我的生產代碼，所以也許這個問題對於我用於模擬的「CollQuery」類非常具體。

有關如何解決這個問題的任何想法？或者，如果有人可以看到不同的方式來模擬數據庫，就像我正在嘗試做的那樣，我將不勝感激任何幫助！

感謝

PS：這是我的包裝 「MockedQuery」 級（很簡單）：

public class MockedQuery<T> implements Query<T> { 

    private final Path<T> path; 
    private final CollQuery collQuery; 

    public MockedQuery(final Path<T> path, final Iterable<T> collection) { 
     this.path = path; 
     collQuery = from(path, collection); 
    } 

    @Override 
    public boolean exists() { 
     return collQuery.exists(); 
    } 

    @Override 
    public boolean notExists() { 
     return !exists(); 
    } 

    @Override 
    public CloseableIterator<T> iterate() { 
     return collQuery.iterate(path); 
    } 

    @Override 
    public List<T> list() { 
     return collQuery.list(path); 
    } 

    @Nullable 
    @Override 
    public T singleResult() { 
     return collQuery.singleResult(path); 
    } 

    @Nullable 
    @Override 
    public T uniqueResult() { 
     return collQuery.uniqueResult(path); 
    } 

    @Override 
    public SearchResults<T> listResults() { 
     return collQuery.listResults(path); 
    } 

    @Override 
    public long count() { 
     return collQuery.count(); 
    } 

    @Override 
    public Query<T> limit(final long limit) { 
     collQuery.limit(limit); 
     return this; 
    } 

    @Override 
    public Query<T> offset(final long offset) { 
     collQuery.offset(offset); 
     return this; 
    } 

    @Override 
    public Query<T> restrict(final QueryModifiers modifiers) { 
     collQuery.restrict(modifiers); 
     return this; 
    } 

    @Override 
    public Query<T> orderBy(final OrderSpecifier<?>... o) { 
     collQuery.orderBy(o); 
     return this; 
    } 

    @Override 
    public <U> Query<T> set(final ParamExpression<U> param, final U value) { 
     collQuery.set(param, value); 
     return this; 
    } 

    @Override 
    public Query<T> distinct() { 
     collQuery.distinct(); 
     return this; 
    } 

    @Override 
    public Query<T> where(final Predicate... o) { 
     collQuery.where(o); 
     return this; 
    } 
} 

Answer 1

的信息，它是固定在querydsl 3.6.3