pythonJob.arg("arg2");
        assertEquals(2, pythonJob.argList.size());
        assertEquals("arg2", pythonJob.argList.get(1));
    }

    // Test multiple arguments addition
    @Test
    public void test_args() {
        assertTrue(pythonJob.argList.isEmpty());

        PythonJob result = pythonJob.args("arg1", "arg2", "arg3");

        assertSame(pythonJob, result);
        assertEquals(3, pythonJob.argList.size());