}
        if (username.length() > MAX_USERNAME_LENGTH) {
            throw new IllegalArgumentException("Username exceeds maximum length: " + username.length());
        }
        if (!username.isEmpty() && !VALID_USERNAME.matcher(username).matches()) {
            throw new IllegalArgumentException("Username contains invalid characters: " + username);
        }
    }

    /**
     * Validates domain name

        if (entityList.isEmpty()) {
            return new int[] {};
        }
        return delegateBatchRequest(entityList, esEntity -> {
            return createInsertRequest(esEntity);
        });
    }

    protected int[] delegateBatchUpdate(List<? extends Entity> entityList, UpdateOption<? extends ConditionBean> option) {
        if (entityList.isEmpty()) {
            return new int[] {};

        } catch (IOException | DomTripException e) {
            context.failure("Failed to discover POM files: " + e.getMessage());
            return 1;
        }

        if (pomMap.isEmpty()) {
            context.warning("No POM files found in " + startingDirectory);
            return 0;
        }

        context.info("Found " + pomMap.size() + " POM file(s)");

    }

    private
    fun assertLeftoverFilesCleanedUpEventually(vararg leftoverFiles: String) {
        leftoverFiles.forEach {
            assertTrue(projectDir.resolve(it).walk().filter { it.isFile }.toList().isEmpty())
        }
    }

    @Test
    fun `fail build if leftover file found and test passes`() {
        val result = run(":successful-test-with-leftover:test").buildAndFail()

	}{
		{set.CreateStringSet("127.0.0.1")},
	}

	for _, testCase := range testCases {
		ipList := mustGetLocalIP4()
		if testCase.expectedIPList != nil && testCase.expectedIPList.Intersection(ipList).IsEmpty() {
			t.Fatalf("host: expected = %v, got = %v", testCase.expectedIPList, ipList)
		}
	}
}

func TestGetHostIP(t *testing.T) {
	testCases := []struct {
		host           string

        if (entityList.isEmpty()) {
            return new int[] {};
        }
        return delegateBatchRequest(entityList, esEntity -> {
            return createInsertRequest(esEntity);
        });
    }

    protected int[] delegateBatchUpdate(List<? extends Entity> entityList, UpdateOption<? extends ConditionBean> option) {
        if (entityList.isEmpty()) {
            return new int[] {};

                        // never convert from legacy to new format if either source or target is legacy format
                        if ( !v.getSnapshotVersions().isEmpty() )
                        {
                            for ( SnapshotVersion sv : versioning.getSnapshotVersions() )
                            {
                                String key = getSnapshotVersionKey( sv );

  public void testJoin() {
    assertThat(Doubles.join(",", EMPTY)).isEmpty();
    assertThat(Doubles.join(",", ARRAY1)).isEqualTo("1.0");
    assertThat(Doubles.join(",", 1.0, 2.0)).isEqualTo("1.0,2.0");
    assertThat(Doubles.join("", 1.0, 2.0, 3.0)).isEqualTo("1.02.03.0");
  }

  public void testJoinNonTrivialDoubles() {
    assertThat(Doubles.join(",", EMPTY)).isEmpty();
    assertThat(Doubles.join(",", 1.2)).isEqualTo("1.2");

      }
    } else {
      elements[dstIndex] = null;
      entries[dstIndex] = 0;
    }
  }

  int firstEntryIndex() {
    return isEmpty() ? -1 : 0;
  }

  int getSuccessor(int entryIndex) {
    return (entryIndex + 1 < size) ? entryIndex + 1 : -1;
  }

  /**

     */
    public boolean isForking() {
        return (getExecuteGoal() != null && !getExecuteGoal().isEmpty())
                || (getExecutePhase() != null && !getExecutePhase().isEmpty());
    }

    public boolean isV4Api() {
        return v4Api;
    }

    /**
     * Creates a shallow copy of this mojo descriptor.
     */