baos.reset();
        byte[] data2 = { 0x41, 0x42, 0x43, 0x44 }; // "ABCD"
        Hexdump.hexdump(ps, data2, 0, 4);
        String output2 = baos.toString();

        assertNotNull(output2);
        assertTrue(output2.contains("00000:"));
        assertTrue(output2.contains(" 41 42 43 44"));
        assertTrue(output2.contains("|ABCD"));

        // Test with empty array
        baos.reset();

# Usage

```go
package main

import (
	"fmt"

	"github.com/smallnest/ringbuffer"
)

func main() {
	rb := ringbuffer.New(1024)

	// write
	rb.Write([]byte("abcd"))
	fmt.Println(rb.Length())
	fmt.Println(rb.Free())

	// read
	buf := make([]byte, 4)
	rb.Read(buf)
	fmt.Println(string(buf))
}
```

    assertThat(PublicSuffixPatterns.TRIE.findSuffixIndex(ImmutableList.of("google", "com")))
        .isEqualTo(1);
    assertThat(PublicSuffixPatterns.TRIE.findSuffixIndex(ImmutableList.of("abc", "google", "com")))
        .isEqualTo(2);

    assertThat(PublicSuffixPatterns.TRIE.findSuffixIndex(ImmutableList.of("co", "uk")))
        .isEqualTo(0);

        assertTrue(systemHelper.containsUppercase("A"));
        assertTrue(systemHelper.containsUppercase("aA"));
        assertTrue(systemHelper.containsUppercase("ABC"));
        assertFalse(systemHelper.containsUppercase("abc"));
        assertFalse(systemHelper.containsUppercase("123"));
        assertFalse(systemHelper.containsUppercase(""));
    }

    @Test

  }

  @Test fun nullDefaultProxySelector() {
    server!!.enqueue(MockResponse(body = "abc"))
    ProxySelector.setDefault(null)
    val client = clientTestRule.newClient()
    val request = Request(server!!.url("/"))
    val response = client.newCall(request).execute()
    assertThat(response.body.string()).isEqualTo("abc")
  }

  @Test fun sslSocketFactorySetAsSocketFactory() {

        .Builder()
        .add("WWW-Authenticate", "Other abc==")
        .build()
    assertThat(headers.parseChallenges("WWW-Authenticate"))
      .isEqualTo(
        listOf(Challenge("Other", mapOf(null to "abc=="))),
      )
  }

  @Test fun token68AndAuthParams() {
    val headers =
      Headers
        .Builder()
        .add("WWW-Authenticate", "Other abc==, realm=myrealm")
        .build()

foo:////://///  s:foo p:////://///
c:/foo  s:c p:/foo
//foo/bar  s:http h:foo p:/bar
http://foo/path;a??e#f#g  s:http h:foo p:/path;a q:??e f:#f#g
http://foo/abcd?efgh?ijkl  s:http h:foo p:/abcd q:?efgh?ijkl
http://foo/abcd#foo?bar  s:http h:foo p:/abcd f:#foo?bar
[61:24:74]:98  s:http h:example.org p:/foo/[61:24:74]:98
http:[61:27]/:foo  s:http h:example.org p:/foo/[61:27]/:foo
http://[1::2]:3:4
http://2001::1
http://2001::1]

  @Test fun byteCount() {
    assertThat(Headers.EMPTY.byteCount()).isEqualTo(0L)
    assertThat(
      Headers
        .Builder()
        .add("abc", "def")
        .build()
        .byteCount(),
    ).isEqualTo(10L)
    assertThat(
      Headers
        .Builder()
        .add("abc", "def")
        .add("ghi", "jkl")
        .build()
        .byteCount(),
    ).isEqualTo(20L)
  }

  @Test fun addDate() {

    }

    @Test
    @DisplayName("writeParametersWireFormat writes referral level and path")
    void testWriteParams() throws Exception {
        Trans2GetDfsReferral cmd = new Trans2GetDfsReferral("abc");
        setPrivateField(cmd, "maxReferralLevel", 0x12AB);
        byte[] buffer = new byte[100];
        int len = cmd.writeParametersWireFormat(buffer, 0);
        assertTrue(len >= 2);

		// Creating sequence of parts for same uploadID.
		{bucketName, objectName, uploadIDs[0], 1, "abcd", "e2fc714c4727ee9395f324cd2e7f331f", int64(len("abcd"))},
		{bucketName, objectName, uploadIDs[0], 2, "efgh", "1f7690ebdd9b4caf8fab49ca1757bf27", int64(len("efgh"))},
		{bucketName, objectName, uploadIDs[0], 3, "ijkl", "09a0877d04abf8759f99adec02baf579", int64(len("abcd"))},