* global profile manager which is required to build a POM like a CLI invocation does. Failure to consider
             * the activated profiles can cause repo declarations to be lost which in turn will result in artifact
             * resolution failures, in particular when using the enhanced local repo which guards access to local files

    assertEquals("gmail.com", hp.getHost());
    assertTrue(hp.hasPort());
    assertEquals(81, hp.getPort());

    assertThrows(IllegalArgumentException.class, () -> HostAndPort.fromParts("gmail.com:80", 81));

    assertThrows(IllegalArgumentException.class, () -> HostAndPort.fromParts("gmail.com", -1));
  }

  public void testFromHost() {
    HostAndPort hp = HostAndPort.fromHost("gmail.com");

Notice that this means "`one_person` is an **instance** of the class `Person`".

It doesn't mean "`one_person` is the **class** called `Person`".

## Pydantic models

<a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> is a Python library to perform data validation.

You declare the "shape" of the data as classes with attributes.

And each attribute has a type.

  // public named classes with a public default constructor.

  public static final class ShortsAsListGenerator extends TestShortListGenerator {
    @Override
    protected List<Short> create(Short[] elements) {
      return asList(elements);
    }
  }

  public static final class ShortsAsListHeadSubListGenerator extends TestShortListGenerator {
    @Override

  // public named classes with a public default constructor.

  public static final class CharsAsListGenerator extends TestCharListGenerator {
    @Override
    protected List<Character> create(Character[] elements) {
      return asList(elements);
    }
  }

  public static final class CharsAsListHeadSubListGenerator extends TestCharListGenerator {
    @Override

  // public named classes with a public default constructor.

  public static final class ShortsAsListGenerator extends TestShortListGenerator {
    @Override
    protected List<Short> create(Short[] elements) {
      return asList(elements);
    }
  }

  public static final class ShortsAsListHeadSubListGenerator extends TestShortListGenerator {
    @Override

  // public named classes with a public default constructor.

  public static final class LongsAsListGenerator extends TestLongListGenerator {
    @Override
    protected List<Long> create(Long[] elements) {
      return asList(elements);
    }
  }

  public static final class LongsAsListHeadSubListGenerator extends TestLongListGenerator {
    @Override

 * Both the unnecessary port specification (`:80`) and the absent trailing slash (`/`) cause URI to
 * bucket the two URLs separately. This harms URI's usefulness in collections. Any application that
 * stores information-per-URL will need to either canonicalize manually, or suffer unnecessary
 * redundancy for such URLs.
 *
 * Because they don't attempt canonical form, these classes are surprisingly difficult to use

      assertEquals(3, cache.getIfPresent(1));
      checkValidState(cache);

      assertThrows(NullPointerException.class, () -> entry.setValue(null));
      checkValidState(cache);
    }
  }

  /* ---------------- Local utilities -------------- */

  /** Most of the tests in this class run against every one of these caches. */
  private Iterable<LoadingCache<Object, Object>> caches() {

func convPartErrToInt(err error) int {
	err = unwrapAll(err)
	switch err {
	case nil:
		return checkPartSuccess
	case errFileNotFound, errFileVersionNotFound:
		return checkPartFileNotFound
	case errFileCorrupt:
		return checkPartFileCorrupt
	case errVolumeNotFound:
		return checkPartVolumeNotFound
	case errDiskNotFound:
		return checkPartDiskNotFound
	default:
		return checkPartUnknown
	}
}