// ## Act ##
        byte[] result = cache.getContentAsBytes();

        // ## Assert ##
        assertEquals(0, result.length);
    }

    @Test
    public void testGetContentAsBytes_EmptyFile() throws IOException {
        // ## Arrange ##
        File tmpFile = File.createTempFile("cache-test-", ".tmp");
        tmpFile.deleteOnExit();
        ContentCache cache = new ContentCache(tmpFile);