NegTokenInit parsed = new NegTokenInit(bytes);
        assertNull(parsed.getMechanisms(), "Mechanisms should be null when absent");
        assertEquals(0, parsed.getContextFlags(), "Flags should be zero when absent");
        assertNull(parsed.getMechanismToken(), "Mechanism token should be null when absent");
        assertNull(parsed.getMechanismListMIC(), "MIC should be null when absent");
    }

    @Test

          // primitives
          .put(Object.class, "")
          .put(Number.class, 0)
          .put(UnsignedInteger.class, UnsignedInteger.ZERO)
          .put(UnsignedLong.class, UnsignedLong.ZERO)
          .put(BigInteger.class, BigInteger.ZERO)
          .put(BigDecimal.class, BigDecimal.ZERO)
          .put(CharSequence.class, "")
          .put(String.class, "")
          .put(Pattern.class, Pattern.compile(""))

		i, test := i, test
		func() {
			defer recoverTest(i, test.ShouldPass, t)
			key := GenerateKey(test.ExtKey[:], test.Random)
			if [32]byte(key) == [32]byte{} {
				t.Errorf("Test %d: generated key is zero key", i) // check that we generate random and unique key
			}
		}()
	}
}

var generateIVTests = []struct {
	Random     io.Reader
	ShouldPass bool
}{
	{Random: nil, ShouldPass: true},              // 0

/*
 * Written by Doug Lea with assistance from members of JCP JSR-166
 * Expert Group and released to the public domain, as explained at
 * http://creativecommons.org/publicdomain/zero/1.0/
 */

/*
 * Source:
 * http://gee.cs.oswego.edu/cgi-bin/viewcvs.cgi/jsr166/src/jsr166e/extra/AtomicDoubleArray.java?revision=1.5
 * (Modified to adapt to guava coding conventions and
 * to use AtomicLongArray instead of sun.misc.Unsafe)
 */

/*
 * Written by Doug Lea and Martin Buchholz with assistance from
 * members of JCP JSR-166 Expert Group and released to the public
 * domain, as explained at
 * http://creativecommons.org/publicdomain/zero/1.0/
 */

/*
 * Source:
 * http://gee.cs.oswego.edu/cgi-bin/viewcvs.cgi/jsr166/src/test/tck-jsr166e/AtomicDoubleTest.java?revision=1.8
 * (Modified to adapt to guava coding conventions)
 */

package com.google.common.util.concurrent;

   * lifetime of the cache.
   *
   * <p><b>Warning:</b> this cache may not be recording statistical data. For example, a cache
   * created using {@link CacheBuilder} only does so if the {@link CacheBuilder#recordStats} method
   * was called. If statistics are not being recorded, a {@code CacheStats} instance with zero for
   * all values is returned.
   *
   */

				isArrayKind = reflectValue.Kind() == reflect.Array
			)

			if !update || reflectValue.Len() == 0 {
				update = false
				if isArrayKind {
					db.Statement.ReflectValue.Set(reflect.Zero(reflectValue.Type()))
				} else {
					// if the slice cap is externally initialized, the externally initialized slice is directly used here
					if reflectValue.Cap() == 0 {

//
//msgp:tuple message
type message struct {
	MuxID      uint64    // Mux to receive message if any.
	Seq        uint32    // Sequence number.
	DeadlineMS uint32    // If non-zero, milliseconds until deadline (max 1193h2m47.295s, ~49 days)
	Handler    HandlerID // ID of handler if invoking a remote handler.
	Op         Op        // Operation. Other fields change based on this value.

    // unless it's actually going to be used; validate() is called for all set method calls, so it
    // needs to be fast.
    // (We could instead generate the message once, when the set is created, but zero is better.)
    if (!validator.get()) {
      throw new IllegalStateException(errorMessage.get());
    }
  }

                return emptyMap();
              }
            })
        .named("emptyMap")
        .withFeatures(CollectionFeature.SERIALIZABLE, CollectionSize.ZERO)
        .suppressing(suppressForEmptyMap())
        .createTestSuite();
  }

  public Test testsForEmptyNavigableMap() {
    return MapTestSuiteBuilder.using(
            new TestStringSortedMapGenerator() {