UrlParameterBuilder { @Nonnull @Override public String toString() { final StringBuilder result = new StringBuilder(); String delim = ""; for (final Pair p : parameters) { result.append(delim).append(encode(p.key)).append('=').append(encode(p.value)); delim = "&"; } return result.toString(); }  void clear(); void addParameter(@Nonnull final String key, @Nonnull final Object value); @Nonnull @Override String toString(); @Nonnull static String encode(@Nonnull final String par); @Nonnull
    static final String ENCODING; }
@Test public void testCreateEmptyString() { LOG.info("testCreateEmptyString"); final UrlParameterBuilder builder = new UrlParameterBuilder(); final String result = builder.toString(); Assert.assertEquals(0, result.length()); }