問題描述

我通過 Eclipse 中的 JVM 參數在系統變量中設置了一個文件夾路徑，我試圖在我的類中訪問它:System.getProperty("my_files_path").

I have a folder path set in system variable through JVM arguments in Eclipse and I am trying to access it in my class as: System.getProperty("my_files_path").

在為此類編寫 junit 測試方法時，我嘗試模擬此調用，因為測試類不考慮 JVM 參數.我使用 PowerMockito 模擬靜態 System 類，并嘗試在調用 System.getProperpty 時返回一些路徑.

While writing junit test method for this class, I tried mocking this call as test classes do not consider JVM arguments. I have used PowerMockito to mock static System class and tried returning some path when System.getProperpty is being called.

在類級別有 @RunWith(PowerMockRunner.class) 和 @PrepareForTest(System.class) 注釋.但是， System 類沒有被嘲笑，因此我總是得到空結果.任何幫助表示贊賞.

Had @RunWith(PowerMockRunner.class) and @PrepareForTest(System.class) annotations at class level. However, System class is not getting mocked as a result I always get null result. Any help is appreciated.

推薦答案

感謝 Satish.除了稍作修改外，此方法有效.我寫了 PrepareForTest(PathFinder.class)，為測試用例而不是 System.class 準備我正在測試的類

Thanks Satish. This works except with a small modification. I wrote PrepareForTest(PathFinder.class), preparing the class I am testing for test cases instead of System.class

另外，由于模擬只工作一次，我在模擬后立即調用了我的方法.我的代碼僅供參考:

Also, as mock works only once, I called my method right after mocking. My code just for reference:

@RunWith(PowerMockRunner.class)
@PrepareForTest(PathInformation.class)
public class PathInformationTest {

    private PathFinder pathFinder = new PathFinder();

@Test
    public void testValidHTMLFilePath() { 
        PowerMockito.mockStatic(System.class);
        PowerMockito.when(System.getProperty("my_files_path")).thenReturn("abc");
        assertEquals("abc",pathFinder.getHtmlFolderPath());
    }
}

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