private static final SecretKey MD5_KEY =
      new SecretKeySpec("secret key".getBytes(UTF_8), "HmacMD5");
  private static final SecretKey SHA1_KEY =
      new SecretKeySpec("secret key".getBytes(UTF_8), "HmacSHA1");
  private static final SecretKey SHA256_KEY =
      new SecretKeySpec("secret key".getBytes(UTF_8), "HmacSHA256");
  private static final SecretKey SHA512_KEY =
      new SecretKeySpec("secret key".getBytes(UTF_8), "HmacSHA512");

### Properties in entirely new classes

When developing an entirely new class (task, extension, domain object, etc), the API should consist of managed lazy properties.

Preferably, these new classes should be 100% managed and have their implementation generated by Gradle at runtime.

  private final ExecutionList list = new ExecutionList();

  public void testRunOnPopulatedList() throws Exception {
    Executor exec = newCachedThreadPool();
    CountDownLatch countDownLatch = new CountDownLatch(3);
    list.add(new MockRunnable(countDownLatch), exec);
    list.add(new MockRunnable(countDownLatch), exec);
    list.add(new MockRunnable(countDownLatch), exec);

    public String formatProgress(long progressedSize, long size) {
        StringBuilder sb = new StringBuilder();
        formatProgress(sb, progressedSize, size);
        return sb.toString();
    }

    public void formatProgress(StringBuilder builder, long progressedSize, long size) {
        if (progressedSize < 0L) {
            throw new IllegalArgumentException("progressed file size cannot be negative: " + size);
        }

  public final String clientSecret;
  public final int port;

  public SlackApi(String clientId, String clientSecret, int port) {
    this.httpClient = new OkHttpClient.Builder()
        .build();
    this.moshi = new Moshi.Builder()
        .add(new SlackJsonAdapters())
        .build();
    this.clientId = clientId;
    this.clientSecret = clientSecret;
    this.port = port;
  }

    AbstractFuture<String> future = new AbstractFuture<String>() {};
    WaiterThread waiter = new WaiterThread(future);
    waiter.start();
    waiter.awaitWaiting();
    PollingThread poller = new PollingThread(future);
    poller.start();
    PollingThread poller2 = new PollingThread(future);
    poller2.start();
    PollingThread poller3 = new PollingThread(future);
    poller3.start();

  private final ForwardingWrapperTester tester = new ForwardingWrapperTester();

  public void testGoodForwarder() {
    tester.testForwarding(
        Arithmetic.class,
        new Function<Arithmetic, Arithmetic>() {
          @Override
          public Arithmetic apply(Arithmetic arithmetic) {
            return new ForwardingArithmetic(arithmetic);
          }
        });
    tester.testForwarding(

import java.io.IOException;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

public final class AccessHeaders {
  private final OkHttpClient client = new OkHttpClient();

  public void run() throws Exception {
    Request request = new Request.Builder()
        .url("https://api.github.com/repos/square/okhttp/issues")
        .header("User-Agent", "OkHttp Headers.java")

        throw new UnsupportedOperationException();
    }

    @Override
    public void assembleModelInheritance(Model child, Model parent) {
        throw new UnsupportedOperationException();
    }

    @Override
    public void assembleBuildInheritance(Build childBuild, Build parentBuild, boolean handleAsInheritance) {
        throw new UnsupportedOperationException();
    }

    @Override

    class BadRunnableException extends RuntimeException {}

    CountingRunnable before = new CountingRunnable();
    Runnable bad =
        new Runnable() {
          @Override
          public void run() {
            throw new BadRunnableException();
          }
        };
    CountingRunnable after = new CountingRunnable();

    future.addListener(before, directExecutor());