assertEquals("WARN", systemHelper.getLogLevel());
        } finally {
            systemHelper.setLogLevel(originalLevel);
        }
    }

    @Test
    public void test_createTempFile_permissions() {
        final File tempFile = systemHelper.createTempFile("test", ".tmp");
        assertNotNull(tempFile);
        assertTrue(tempFile.exists());
        assertTrue(tempFile.canRead());