@Test
 public void test_headerlinereader_trim() {
   StringBuffer sb = new StringBuffer();
   sb.setLength(0);
   sb.append("");
   Assert.assertEquals("", HeaderLineReader.trim(sb));
   sb.setLength(0);
   sb.append(" ");
   Assert.assertEquals("", HeaderLineReader.trim(sb));
   sb.setLength(0);
   sb.append("  ");
   Assert.assertEquals("", HeaderLineReader.trim(sb));
   sb.setLength(0);
   sb.append("   ");
   Assert.assertEquals("", HeaderLineReader.trim(sb));
   sb.setLength(0);
   sb.append("text");
   Assert.assertEquals("text", HeaderLineReader.trim(sb));
   sb.setLength(0);
   sb.append(" text");
   Assert.assertEquals("text", HeaderLineReader.trim(sb));
   sb.setLength(0);
   sb.append("  text");
   Assert.assertEquals("text", HeaderLineReader.trim(sb));
   sb.setLength(0);
   sb.append("   text");
   Assert.assertEquals("text", HeaderLineReader.trim(sb));
   sb.setLength(0);
   sb.append("text ");
   Assert.assertEquals("text", HeaderLineReader.trim(sb));
   sb.setLength(0);
   sb.append("text  ");
   Assert.assertEquals("text", HeaderLineReader.trim(sb));
   sb.setLength(0);
   sb.append("text   ");
   Assert.assertEquals("text", HeaderLineReader.trim(sb));
   sb.setLength(0);
   sb.append(" text ");
   Assert.assertEquals("text", HeaderLineReader.trim(sb));
   sb.setLength(0);
   sb.append("  text  ");
   Assert.assertEquals("text", HeaderLineReader.trim(sb));
   sb.setLength(0);
   sb.append("   text   ");
   Assert.assertEquals("text", HeaderLineReader.trim(sb));
   sb.setLength(0);
   sb.append(" \u0001text\u0002 ");
   Assert.assertEquals("\u0001text\u0002", HeaderLineReader.trim(sb));
   sb.setLength(0);
   sb.append("  \u0001text\u0002  ");
   Assert.assertEquals("\u0001text\u0002", HeaderLineReader.trim(sb));
   sb.setLength(0);
   sb.append("   \u0001text\u0002   ");
   Assert.assertEquals("\u0001text\u0002", HeaderLineReader.trim(sb));
   sb.setLength(0);
   sb.append("  \u0001 text \u0002  ");
   Assert.assertEquals("\u0001 text \u0002", HeaderLineReader.trim(sb));
   sb.setLength(0);
   sb.append(" \u0001  text  \u0002 ");
   Assert.assertEquals("\u0001  text  \u0002", HeaderLineReader.trim(sb));
   sb.setLength(0);
   sb.append("\u0001   text   \u0002");
   Assert.assertEquals("\u0001   text   \u0002", HeaderLineReader.trim(sb));
 }