如何模拟ResourceBundle.getString()？

我嘲笑失败ResourceBundle.getString().

这是我的代码：

ResourceBundle schemaBundle = Mockito.mock(ResourceBundle.class);
Mockito.when(schemaBundle.getString("testKey_testPropertyName_ect")).thenReturn("testString1");

这在第二行给出了以下异常：

java.util.MissingResourceException: Can't find resource for bundle $java.util.ResourceBundle$$EnhancerByMockitoWithCGLIB$$9e259f03, key testKey_testPropertyName_ect
    at java.util.ResourceBundle.getObject(ResourceBundle.java:374)
    at java.util.ResourceBundle.getString(ResourceBundle.java:334)
    at com.foo.bar.resource.PropertyResourceTest.testGet(PropertyResourceTest.java:104)
    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 org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
    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)

对我来说这看起来好像schemaBundle根本没有被嘲笑。但调试器清楚地表明，该实例是由mockito 包装的。

我也尝试过

Mockito.doReturn("testString1").when(schemaBundle).getString("testKey_testPropertyName_ect");

但这会返回相同的异常。

知道出了什么问题吗？

您可以创建一个虚拟的 ResourceBundle 实现，然后将其作为参数传递给.thenReturn(resourceBundle):

    import java.util.ResourceBundle;

    ResourceBundle dummyResourceBundle = new ResourceBundle() {
        @Override
        protected Object handleGetObject(String key) {
            return "fake_translated_value";
        }

        @Override
        public Enumeration<String> getKeys() {
            return Collections.emptyEnumeration();
        }
    };

    // Example usage
    when(request.getResourceBundle(any(Locale.class))).thenReturn(dummyResourceBundle)

如果您需要实际的键和值，那么您需要提供一个实现getKeys()，例如用于存储和键查找的哈希图。