*
     * @param encoding the encoding
     * @return this CurlRequest instance
     * @throws CurlException if the method is called after the param method
     */
    public CurlRequest encoding(final String encoding) {
        if (paramList != null) {
            throw new CurlException("This method must be called before param method.");
        }
        this.encoding = encoding;
        return this;

            fail("Expected CurlException");
        } catch (CurlException e) {
            assertTrue(e.getMessage().contains("Failed to access the content"));
            // The cause should be another CurlException from getContentAsStream()
            assertTrue(e.getCause() instanceof CurlException);
            CurlException innerException = (CurlException) e.getCause();

        request.param("key", "value");

        try {
            request.encoding("ISO-8859-1");
            fail("Expected CurlException");
        } catch (CurlException e) {
            assertTrue(e.getMessage().contains("must be called before param method"));
        }
    }

    @Test
    public void testThresholdMethod() {