/**
 * Benchmark for {@code LocalCache.Segment.expand()}.
 *
 * @author Charles Fry
 */
public class SegmentBenchmark {

  @Param({"16", "32", "64", "128", "256", "512", "1024", "2048", "4096", "8192"})
  int capacity;

  private Segment<Object, Object> segment;

  @BeforeExperiment
  void setUp() {
    LocalCache<Object, Object> cache =
        new LocalCache<>(

            1,
            2,
            4,
            8,
            16,
            32,
            64,
            128,
            256,
            512,
            1024,
            2048,
            4096,
            8192,
            16384,
            32768,
            65536,
            131072,
            262144,
            524288,
            1048576,
            2097152,

      assertHashStringWithSurrogatesEquivalence(hashFunction, random);
    }
  }

  private static void assertHashBytesEquivalence(HashFunction hashFunction, Random random) {
    int size = random.nextInt(2048);
    byte[] bytes = new byte[size];
    random.nextBytes(bytes);
    assertEquals(
        hashFunction.hashBytes(bytes), hashFunction.newHasher(size).putBytes(bytes).hash());
    int off = random.nextInt(size);

/**
 * Benchmark for {@code LocalCache.Segment.expand()}.
 *
 * @author Charles Fry
 */
public class SegmentBenchmark {

  @Param({"16", "32", "64", "128", "256", "512", "1024", "2048", "4096", "8192"})
  int capacity;

  private Segment<Object, Object> segment;

  @BeforeExperiment
  void setUp() {
    LocalCache<Object, Object> cache =
        new LocalCache<>(

    assertEquals(TEST_STRING, escapeAsString(e, TEST_STRING));
  }

  public void testSimpleEscaper() {
    UnicodeEscaper e = SIMPLE_ESCAPER;
    String expected =
        "[0]abyz[128][256][2048][4096]ABYZ[65535]"
            + "["
            + Character.MIN_SUPPLEMENTARY_CODE_POINT
            + "]"
            + "0189["
            + Character.MAX_CODE_POINT
            + "]";

      assertHashStringWithSurrogatesEquivalence(hashFunction, random);
    }
  }

  private static void assertHashBytesEquivalence(HashFunction hashFunction, Random random) {
    int size = random.nextInt(2048);
    byte[] bytes = new byte[size];
    random.nextBytes(bytes);
    assertEquals(
        hashFunction.hashBytes(bytes), hashFunction.newHasher(size).putBytes(bytes).hash());
    int off = random.nextInt(size);

      (long) Math.pow(EXPECTED_ONE_BYTE_ROUNDTRIPPABLE_COUNT, 2)
          +
          // The possible number of two byte characters
          TWO_BYTE_ROUNDTRIPPABLE_CHARACTERS;

  // 2048
  private static final long THREE_BYTE_SURROGATES = 2 * 1024;

  // 61,440 [chars 0x0800 to 0xFFFF, minus surrogates]
  private static final long THREE_BYTE_ROUNDTRIPPABLE_CHARACTERS =

            1,
            2,
            4,
            8,
            16,
            32,
            64,
            128,
            256,
            512,
            1024,
            2048,
            4096,
            8192,
            16384,
            32768,
            65536,
            131072,
            262144,
            524288,
            1048576,
            2097152,

    assertEquals(TEST_STRING, escapeAsString(e, TEST_STRING));
  }

  public void testSimpleEscaper() {
    UnicodeEscaper e = SIMPLE_ESCAPER;
    String expected =
        "[0]abyz[128][256][2048][4096]ABYZ[65535]"
            + "["
            + Character.MIN_SUPPLEMENTARY_CODE_POINT
            + "]"
            + "0189["
            + Character.MAX_CODE_POINT
            + "]";

      (long) Math.pow(EXPECTED_ONE_BYTE_ROUNDTRIPPABLE_COUNT, 2)
          +
          // The possible number of two byte characters
          TWO_BYTE_ROUNDTRIPPABLE_CHARACTERS;

  // 2048
  private static final long THREE_BYTE_SURROGATES = 2 * 1024;

  // 61,440 [chars 0x0800 to 0xFFFF, minus surrogates]
  private static final long THREE_BYTE_ROUNDTRIPPABLE_CHARACTERS =