fail("Expected IOException for deleted file");
        } catch (IOException e) {
            // Expected - file no longer exists
        }
    }

    @Test
    public void testFileBasedCacheCloseNonExistentFile() {
        tempFile = new File(Curl.tmpDir, "non-existent-file.tmp");
        assertFalse(tempFile.exists());

        ContentCache cache = new ContentCache(tempFile);