assertWithMessage("%s to %s", from, from).that(from.to(from, "foo")).isSameInstanceAs("foo");
      for (CaseFormat to : CaseFormat.values()) {
        assertWithMessage("%s to %s", from, to).that(from.to(to, "")).isEmpty();
        assertWithMessage("%s to %s", from, to).that(from.to(to, " ")).isEqualTo(" ");
      }
    }
  }

  @J2ktIncompatible
  @GwtIncompatible // NullPointerTester
  public void testNullArguments() {

        insertContentElement(parent, GROUP_ID, groupId);
        insertContentElement(parent, ARTIFACT_ID, artifactId);
        if (version != null && !version.isEmpty()) {
            insertContentElement(parent, VERSION, version);
        }
    }

    /**
     * Convenience method to create a dependency element with GAV.
     *

        assertFalse(manager.isUseMultiChannel());
    }

    @Test
    void testGetHealthyChannels() throws UnknownHostException {
        assertTrue(channelManager.getHealthyChannels().isEmpty());

        // Add a healthy channel manually for testing
        InetAddress addr = InetAddress.getByName("192.168.1.100");
        NetworkInterfaceInfo localInterface = new NetworkInterfaceInfo(addr, 1000);

    }

    @Override
    public String getContentType(final InputStream is, final Map<String, String> params) {
        final String filename = params.get(ExtractData.RESOURCE_NAME_KEY);
        if (StringUtil.isEmpty(filename) && is == null) {
            throw new MimeTypeException("Cannot detect MIME type: both filename and input stream are empty. At least one is required.");
        }

        final Metadata metadata = new Metadata();

        if (body.documents == null) {
            throwValidationErrorApi(messages -> messages.addErrorsCrudFailedToCreateCrudTable(GLOBAL, "documents is required."));
        }
        if (body.documents.isEmpty()) {
            throwValidationErrorApi(messages -> messages.addErrorsCrudFailedToCreateCrudTable(GLOBAL, "documents is empty."));
        }
        final String indexFieldId = fessConfig.getIndexFieldId();

        Model model = builder.build(session, project, Sources.buildSource(file));

        assertNotNull(model);
        assertTrue(model.getProfiles().isEmpty());
    }

    @Test
    void testScmInheritance() throws Exception {
        Model model = Model.newBuilder()
                .scm(Scm.newBuilder()

          @Override
          public @Nullable Object getIfPresent(Object key) {
            return null;
          }
        };

    assertThat(cache.getAllPresent(ImmutableList.of(new Object()))).isEmpty();
  }

  public void testGetAllPresent_cached() {
    Object cachedKey = new Object();
    Object cachedValue = new Object();
    Cache<Object, Object> cache =
        new AbstractCache<Object, Object>() {

        if (rev != null || timestamp != null) {
            msg += " (";
            msg += (rev != null ? rev : "");
            if (timestamp != null && !timestamp.isEmpty()) {
                String ts = formatTimestamp(Long.parseLong(timestamp));
                msg += (rev != null ? "; " : "") + ts;
            }
            msg += ")";
        }
        return msg;
    }

            if (methodLinkMetaData.name.equals(method)) {
                candidates.add(methodLinkMetaData);
            }
        }
        if (candidates.isEmpty()) {
            String message = String.format("No method '%s' found for class '%s'.\nFound the following methods:", method, className);
            for (MethodLinkMetaData methodLinkMetaData : methods.values()) {

    delegate = forward;
  }

  private AbstractBiMap<V, K> checkMapsAndMakeInverse(Map<K, V> forward, Map<V, K> backward) {
    checkArgument(forward.isEmpty());
    checkArgument(backward.isEmpty());
    checkArgument(forward != backward);
    return makeInverse(backward);
  }

  AbstractBiMap<V, K> makeInverse(Map<V, K> backward) {
    return new Inverse<>(backward, this);
  }