問題描述

我通過 Eclipse 中的 JVM 參數(shù)在系統(tǒng)變量中設(shè)置了一個(gè)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(cè)試方法時(shí)，我嘗試模擬此調(diào)用，因?yàn)闇y(cè)試類不考慮 JVM 參數(shù).我使用 PowerMockito 模擬靜態(tài) System 類，并嘗試在調(diào)用 System.getProperpty 時(shí)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(jí)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(jié)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(cè)試用例而不是 System.class 準(zhǔn)備我正在測(cè)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(diào)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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