Vamos usar as ferramentas fornecidas pela **FastAPI** para lidar com segurança.

## Como Parece

Vamos primeiro usar o código e ver como funciona, e depois voltaremos para entender o que está acontecendo.

## Crie um `main.py`
Copie o exemplo em um arquivo `main.py`:

```Python
{!../../docs_src/security/tutorial001.py!}
```

## Execute-o

/// info | "informação"

   */
  private abstract static class NodeConnection<N> {
    final N node;

    NodeConnection(N node) {
      this.node = checkNotNull(node);
    }

    static final class Pred<N> extends NodeConnection<N> {
      Pred(N node) {
        super(node);
      }

      @Override
      public boolean equals(@CheckForNull Object that) {
        if (that instanceof Pred) {

import org.codelibs.fess.es.config.allcommon.EsAbstractEntity;
import org.codelibs.fess.es.config.bsentity.dbmeta.CrawlingInfoDbm;

/**
 * ${table.comment}
 * @author ESFlute (using FreeGen)
 */
public class BsCrawlingInfo extends EsAbstractEntity {

    // ===================================================================================
    //                                                                          Definition

package org.codelibs.fess.crawler.util;

import java.util.Collections;
import java.util.Map;

import org.apache.groovy.util.Maps;
import org.codelibs.fess.unit.UnitFessTestCase;

public class FieldConfigsTest extends UnitFessTestCase {
    public void test_empty() {
        final FieldConfigs fieldConfigs = new FieldConfigs(Collections.emptyMap());
        assertTrue(fieldConfigs.getConfig("test").isEmpty());
    }

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.validation;

import org.codelibs.fess.unit.UnitFessTestCase;

public class UriTypeValidatorTest extends UnitFessTestCase {
    public void test_check_ok() {
        String[] protocols;
        String values;

        protocols = new String[] { "http:" };
        values = "http://www.foo.com/";

  @Override
  public SampleElements<String> sampleValues() {
    return new SampleElements<>("January", "February", "March", "April", "May");
  }

  @Override
  public Collection<String> createCollection(Iterable<? extends String> values) {
    return copyToList(values);
  }

  @Override
  public final ListMultimap<String, String> create(Object... entries) {
    @SuppressWarnings("unchecked")

  @Override
  public SampleElements<String> sampleValues() {
    return new SampleElements<>("January", "February", "March", "April", "May");
  }

  @Override
  public Collection<String> createCollection(Iterable<? extends String> values) {
    return copyToSet(values);
  }

  @Override
  public final SetMultimap<String, String> create(Object... entries) {
    @SuppressWarnings("unchecked")

 */
@GwtCompatible
@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class MapContainsValueTester<K, V> extends AbstractMapTester<K, V> {
  @CollectionSize.Require(absent = ZERO)
  public void testContains_yes() {
    assertTrue("containsValue(present) should return true", getMap().containsValue(v0()));
  }

 * @author Chris Povirk
 */
@GwtCompatible
@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class SetCreationTester<E> extends AbstractSetTester<E> {
  @CollectionFeature.Require(value = ALLOWS_NULL_VALUES, absent = REJECTS_DUPLICATES_AT_CREATION)
  @CollectionSize.Require(absent = {ZERO, ONE})

 */
@GwtCompatible(emulated = true)
@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class SetHashCodeTester<E> extends AbstractSetTester<E> {
  public void testHashCode() {
    int expectedHashCode = 0;
    for (E element : getSampleElements()) {
      expectedHashCode += ((element == null) ? 0 : element.hashCode());
    }