@Override
    public String toString() {
        return "path:'" + getPath()
            + "'|param:'" + getParamName()
            + "'|mimetype:'" + getMimeType() + "'";
    }
@Test
    public void testToString() throws Exception {
        HTTPFileArg file = new HTTPFileArg("path1", "param1", "mimetype1");
        assertEquals("path:'path1'|param:'param1'|mimetype:'mimetype1'", file.toString());
    }