private transient Map<K, KeyList<K, V>> keyToKeyList;
  private transient int size;

  /*
   * Tracks modifications to keyToKeyList so that addition or removal of keys invalidates
   * preexisting iterators. This does *not* track simple additions and removals of values
   * that are not the first to be added or last to be removed for their key.
   */
  private transient int modCount;

## **4. Run Sample Applications**

After installing Hive, Hadoop and Spark successfully, we can now proceed to run some sample applications to see if they are configured appropriately.  We can use Spark Pi and Spark WordCount programs to validate our Spark installation. We can also explore how to run Spark jobs from the command line and Spark shell.

### **4.1 Spark Pi**

func TestScanRune(t *testing.T) {
	for n, test := range scanTests {
		buf := strings.NewReader(test)
		s := NewScanner(buf)
		s.Split(ScanRunes)
		var i, runeCount int
		var expect rune
		// Use a string range loop to validate the sequence of runes.
		for i, expect = range test {
			if !s.Scan() {
				break
			}
			runeCount++
			got, _ := utf8.DecodeRune(s.Bytes())
			if got != expect {

      when (expected) {
        is SSLHandshakeException -> {
          // On Android, the handshake fails before the certificate pinner runs.
          assertThat(expected.message!!).contains("Could not validate certificate")
        }
        is SSLPeerUnverifiedException -> {
          // On OpenJDK, the handshake succeeds but the certificate pinner fails.

Esto también funcionará porque `RedirectResponse` es una subclase de `Response`, y FastAPI manejará automáticamente este caso simple.

### Anotaciones de Tipos de Retorno Inválidas

	if !opts.NoAuditLog {
		auditObjectErasureSet(ctx, "PutObjectPart", object, &er)
	}

	data := r.Reader
	// Validate input data size and it can never be less than zero.
	if data.Size() < -1 {
		bugLogIf(ctx, errInvalidArgument, logger.ErrorKind)
		return pi, toObjectErr(errInvalidArgument)
	}

	if group == "" {
		return updatedAt, errInvalidArgument
	}

	cache := store.lock()
	defer store.unlock()

	// Validate that all members exist.
	for _, member := range members {
		u, ok := cache.iamUsersMap[member]
		if !ok {
			return updatedAt, errNoSuchUser
		}
		cr := u.Credentials

				}
				defer logger.AuditLog(r.Context(), w, r, mustGetClaimsFromToken(r))
				writeErrorResponse(r.Context(), w, errorCodes.ToAPIErr(ErrAllAccessDisabled), r.URL)
				return
			}
		} else {
			// Validate bucket names if it is not empty
			if bucketName != "" && s3utils.CheckValidBucketNameStrict(bucketName) != nil {
				if ok {
					tc.FuncName = "handler.ValidRequest"
					tc.ResponseRecorder.LogErrBody = true
				}

       *
       * Well, really, we use this when we think we're running under Java 8, as determined by some
       * logic in the static initializer, which does not check for getTypeName specifically. We
       * should really validate that it works as desired for all Android versions that we support.
       */
      @IgnoreJRERequirement
      @SuppressWarnings("AndroidJdkLibsChecker")
      @Override
      String typeName(Type type) {

				t.Errorf("Test %d: Expected the result to be \"%v\", but got \"%v\". ", i+1, testCase.expectedAuthField, parsedAuthField.SignedHeaders)
			}
		}
	}
}

// TestDoesV4PresignParamsExist - tests validate the logic to
func TestDoesV4PresignParamsExist(t *testing.T) {
	testCases := []struct {
		inputQueryKeyVals []string
		expectedErrCode   APIErrorCode
	}{
		// Test case - 1.