java - 在单元测试期间创建自定义 @TestScoped Guice 范围

Question

我想限制对象的范围，以便它们在单元测试期间作为单例存在。该模式将遵循 Google Guice 中已实现的 @RequestScoped 和 @SessionScoped，范围围绕 junit 测试的 @Before 和 @After:

public class MyUnitTest {
    @TestScoped static class MyTestScopedClass { }

    @Before public void enterTestScope() {
        // something here creates the TestScope
    }

    @After public void exitTestScope() {
        // destroy the TestScope
    }

    @Test public void MyTest() {
        // MyTest instantiates object using injection, some are @Singletons
        // and will remain for other tests, but those that are @TestScoped
        // will be created once for this test and will be automatically 
        // destroyed at the end of this test
    }
} 

这可以通过 Google Guice 实现吗？

Answer 1

如果你使用GuiceBerry(基本上是用于测试/jUnit的Guice)，你可以使用@TestScoped

import com.google.guiceberry.TestScoped;

@Provides
@TestScoped
FlyingSquirrel provideFlyingSquirrel() {
  return new WhaleFlyingSquirrelImpl(42);
}