if (!fatals.contains(req.getMessage())) {
                    fatals.add(req.getMessage());
                }
                break;
            case ERROR:
                if (!errors.contains(req.getMessage())) {
                    errors.add(req.getMessage());
                }
                break;
            case WARNING:
                if (!warnings.contains(req.getMessage())) {

                () -> newModelResolver().resolveModel(parent, new AtomicReference<>()),
                "Expected 'UnresolvableModelException' not thrown.");
        assertNotNull(e.getMessage());
        assertTrue(e.getMessage().contains("Could not find artifact ut.simple:artifact:pom:0 in repo"));
    }

    @Test
    void testResolveParentThrowsUnresolvableModelExceptionWhenNoMatchingVersionFound() throws Exception {

            } catch (RepositoryMetadataReadException e) {
                if (getLogger().isDebugEnabled()) {
                    getLogger().warn(e.getMessage(), e);
                } else {
                    getLogger().warn(e.getMessage());
                }
                return setRepository;
            }

            if (repoMetadata.isSnapshot() && (previousMetadata != null)) {

        if (e != null) {
            if (e instanceof MetadataNotFoundException) {
                logger.debug(e.getMessage());
            } else if (logger.isDebugEnabled()) {
                logger.warn(e.getMessage(), e);
            } else {
                logger.warn(e.getMessage());
            }
        }
    }

    @Override
    public void metadataInvalid(RepositoryEvent event) {

            throw new TransferFailedException("Connection failed: " + e.getMessage(), e);
        } catch (AuthenticationException e) {
            throw new TransferFailedException("Authentication failed: " + e.getMessage(), e);
        } catch (AuthorizationException e) {
            throw new TransferFailedException("Authorization failed: " + e.getMessage(), e);
        } finally {

    assertThat(expected.getMessage()).contains("1, 2");
  }

  public void testOnlyElementMany() {
    IllegalArgumentException expected =
        assertThrows(
            IllegalArgumentException.class,
            () -> Stream.of(1, 2, 3, 4, 5, 6).collect(onlyElement()));
    assertThat(expected.getMessage()).contains("1, 2, 3, 4, 5, ...");
  }

    void testNoProblems() {
        ToolchainsBuildingException e = new ToolchainsBuildingException(Collections.<Problem>emptyList());
        assertEquals("0 problems were encountered while building the effective toolchains" + LS, e.getMessage());
    }

    @Test
    void testOneProblem() {
        ProblemCollector problemCollector = ProblemCollectorFactory.newInstance(null);

        try {
            return new Settings(delegate.read(reader, strict, null));
        } catch (XMLStreamException e) {
            throw new XmlPullParserException(e.getMessage(), null, e);
        }
    }

    /**
     * @param reader a reader object.
     * @throws IOException IOException if any.
     * @throws XmlPullParserException XmlPullParserException if
     * any.

          "the hash (1) of TestObject{group=1, item=1} [group 1, item 1] must be "
              + "equal to the hash (2) of TestObject{group=1, item=2} [group 1, item 2]";
      if (!expected.getMessage().contains(expectedMessage)) {
        fail("<" + expected.getMessage() + "> expected to contain <" + expectedMessage + ">");
      }
      return;
    }
    fail();
  }

  /** An object with a friendly {@link #toString()}. */

          "the hash (1) of TestObject{group=1, item=1} [group 1, item 1] must be "
              + "equal to the hash (2) of TestObject{group=1, item=2} [group 1, item 2]";
      if (!expected.getMessage().contains(expectedMessage)) {
        fail("<" + expected.getMessage() + "> expected to contain <" + expectedMessage + ">");
      }
      return;
    }
    fail();
  }

  /** An object with a friendly {@link #toString()}. */