How to mock ResourceBundle.getString()?

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盖世英雄少女心
盖世英雄少女心 2021-02-19 03:35

I\'m failing to mock ResourceBundle.getString().

This is my code:

ResourceBundle schemaBundle = Mockito.mock(ResourceBundle.class);
Mockito.         


        
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4条回答
  • 2021-02-19 03:50

    You'll find an example of solution below :

    @RunWith(PowerMockRunner.class)
    @PrepareForTest({ ResourceBundle.class })
    public class ResourceBundleTest {
    
        @Test
        public void getStringByPowerMock() throws Exception {   
            ResourceBundle resourceBundle = PowerMockito.mock(ResourceBundle.class);
            Mockito.when(resourceBundle.getString(Mockito.anyString())).thenReturn("Hello world....");
            System.out.println(resourceBundle.getString("keyword"));
        }
    
    }
    
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  • 2021-02-19 03:50

    I figured out a way to mock ResourceBundle by subclassing ResourceBundle.Control. My answer is here:

    https://stackoverflow.com/a/28640458/290254

    I prefer to avoid the dynamic bytecode rewriting (to remove final) of PowerMock, JMockit and friends, since Jacoco and other things seem to hate it.

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  • 2021-02-19 03:52

    @Powermockito did not worked as ResourceBundle.class have static final methods which were not easy to mock.

    I tried.

    In the Main Class extract your method inside another public method, and then overide it with implementaion.

    Here ReviewEChannelApplicationMBean is my Controller, where i overrriden the getBundle.

    ReviewEChannelApplicationMBean = spy(new ReviewEChannelApplicationMBean(){
                @Override
                public ResourceBundle getBundle(FacesContext fcContext) {
                    return TestDataBuilder.getResourceBundle();
                }
            });
    

    //This Class i my TestDataBuilder using ListResourceBundle

    public class TestDataBuilder {
        public static ResourceBundle getResourceBundle() {
                return new ListResourceBundle(){
    
                    @Override
                    protected Object[][] getContents() {
                        return contents;
                    }
    
                    private Object[][] contents = {
                            {"test1","01"},
                            {"test2","01"},
                            {"test3","01"},
                            {"test4","01"}
                    };
                };
    
            }
    }
    
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  • 2021-02-19 03:55

    Instead of mocking you can create a dummy ResourceBundle implementation, and then pass it in .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)
    

    If you need the actual keys and values, then you'll need to provide an implementation for getKeys(), e.g. a hashmap for storage and key lookup.

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