{*../../docs_src/websockets/tutorial003_py39.py hl[79:81]*}

Para testar:

* Abrar o aplicativo com várias abas do navegador.
* Escreva mensagens a partir delas.
* Então feche uma das abas.

        assertThat(WildcardType.class.isInstance(GenericsUtil.getElementTypeOfList(t3)), is(true));
    }

    /**
     * @throws Exception
     */
    public void testSet() throws Exception {
        final Method m1 = SetType.class.getMethod("setOfString");
        final Type t1 = m1.getGenericReturnType();
        assertThat(GenericsUtil.isTypeOf(t1, Set.class), is(true));

        return [acceptedApiChanges: [:],
            publicApiPatterns: ['gradlebuild[.]binarycompatibility[.]rules.[^.]+'],
            apiChangesJsonFile: new File(testDir, 'test-api-changes.json').path,
            projectRootDir: testDir.path]
    }

    String replaceAsInternal(String name) {
        return name.replace('gradlebuild', 'gradlebuild.internal')
    }

	respBytes, err := io.ReadAll(io.LimitReader(resp.Body, respBodyLimit))
	if err != nil {
		return "", err
	}
	respStr := string(respBytes)

	if resp.StatusCode == http.StatusOK {
		return respStr, nil
	}

	return respStr, fmt.Errorf("SUBNET request failed with code %d and error: %s", resp.StatusCode, respStr)
}

// Post submit 'payload' to specified URL
func (c Config) Post(reqURL string, payload interface{}) (string, error) {

  }

  public void testNulls() throws Exception {
    NullPointerTester tester = new NullPointerTester();

    tester.testConstructors(PatternFilenameFilter.class, Visibility.PACKAGE);
    tester.testStaticMethods(PatternFilenameFilter.class, Visibility.PACKAGE); // currently none

    // The reason that we skip this method is discussed in a comment on the method.
    tester.ignore(PatternFilenameFilter.class.getMethod("accept", File.class, String.class));

import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Tester to ensure forwarding wrapper works by delegating calls to the corresponding method with
 * the same parameters forwarded and return value forwarded back or exception propagated as is.
 *
 * <p>For example:
 *
 * <pre>{@code

import java.util.Spliterator.OfPrimitive;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Supplier;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Tester for {@code Spliterator} implementations.
 *
 * @since NEXT (but since 21.0 in the JRE flavor)
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
@SuppressWarnings("Java7ApiChecker")

import java.util.Spliterator.OfPrimitive;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Supplier;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Tester for {@code Spliterator} implementations.
 *
 * @since 21.0 (but only since 33.4.0 in the Android flavor)
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault

    "path": "platforms/software/plugins-version-catalog",
    "unitTests": false,
    "functionalTests": true,
    "crossVersionTests": false
  },
  {
    "name": "precondition-tester",
    "path": "testing/precondition-tester",
    "unitTests": true,
    "functionalTests": true,
    "crossVersionTests": true
  },
  {
    "name": "problems",
    "path": "platforms/ide/problems",

import java.net.UnknownHostException;
import java.util.Enumeration;
import junit.framework.TestCase;

/**
 * Tests for {@link InetAddresses}.
 *
 * @author Erik Kline
 */
public class InetAddressesTest extends TestCase {

  public void testNulls() {
    NullPointerTester tester = new NullPointerTester();

    tester.testAllPublicStaticMethods(InetAddresses.class);
  }

  public void testForStringBogusInput() {