在Eclipse项目之外以编程方式运行JUnit测试

Question

I am trying to run JUnit tests from an application that is being developed in Eclipse, like so:

JUnitCore junitCore = new JUnitCore();
ClassLoader cl = Main.class.getClassLoader();
Class<?> test = cl.loadClass("test.TestCase1");
Result r = junitCore.run(test);

This runs fine, but if the test case needs to use some files, I get a FileNotFoundException . Running the same test in the Eclipse project, the test has no such error. I think this is because my JVM's working directory (defined in the user.dir property) is not the same as the Eclipse project. As far as I know, I cannot change the user.dir in a running JVM.

What can I do to change this behavior? Is my only option to fire a new JVM with the same working directory as the Eclipse project? If so, how can I do that, preferably without using tools like Ant?

edit: Here is an example of a test that passes in the Eclipse project, and generates a FileNotFoundException when I run it programmatically outside of the project:

@Test
public void test() throws Exception {
    FileInputStream fstream = new FileInputStream("test1.txt");
    DataInputStream in = new DataInputStream(fstream);
    BufferedReader br = new BufferedReader(new InputStreamReader(in));  
    assertEquals("file content", br.readLine());
}

Answer 1

Try this code

new BufferedReader(new InputStreamReader(this.getClass().getResourceAsStream("filename")));

If your file is in the same directory as java class it should be loaded.

Update

In this case, try to specify working directory when you run your JUnits tests

-Duser.dir=somedir

Answer 2

Try retrieving the current Directory your JUnit Test is in and then create a new File navigating to the test1.txt

String currentDirectory = new File("").getAbsolutePath();

FileInputStream fstream = new FileInputStream(currentDirectory+"\\XYZ\\test1.txt");