code: @Test public void testInvalidNVArguments() throws Exception {
    try {
      BasicHeaderValueFormatter.formatNameValuePair((NameValuePair)null,true,null);
      Assert.fail("IllegalArgumentException should habe been thrown");
    }
   catch (  IllegalArgumentException ex) {
    }
    try {
      BasicHeaderValueFormatter.formatParameters((NameValuePair[])null,true,BasicHeaderValueFormatter.DEFAULT);
      Assert.fail("IllegalArgumentException should habe been thrown");
    }
   catch (  IllegalArgumentException ex) {
    }
  }
  