return new StringSourceFactory();
  }

  public static ByteSourceFactory byteArraySourceFactory() {
    return new ByteArraySourceFactory();
  }

  public static ByteSourceFactory emptyByteSourceFactory() {
    return new EmptyByteSourceFactory();
  }

  public static CharSourceFactory emptyCharSourceFactory() {
    return new EmptyCharSourceFactory();
  }

        Map<String, String> envVarMap = new HashMap<>();
        envVarMap.put("testKey", "testValue");
        envVarMap.put("testSpecialCharactersKey", "<test&Value>");
        OperatingSystemUtils.setEnvVarSource(new TestEnvVarSource(envVarMap));

        toolchainBuilder = new DefaultToolchainsBuilder(
                new org.apache.maven.internal.impl.DefaultToolchainsBuilder(
                        new DefaultInterpolator(), toolchainsXmlFactory),

        return df.format(new Date());
    }

    @Test
    void gregorianCalendarIsUsed() {
        String dateBefore = gregorianDate();

        RemoteSnapshotMetadata metadata =
                new RemoteSnapshotMetadata(new DefaultArtifact("a:b:1-SNAPSHOT"), new Date(), null);
        metadata.merge(new Metadata());

        String dateAfter = gregorianDate();

                    readings[0] = l.toArray(new String[l.size()]);

                    if (items == null) {
                        items = new ArrayList<>(text.length() * fields.length / field.length());
                    }

                    final String[] langs = lang == null ? new String[] {} : new String[] { lang };
                    items.add(new SuggestItem(words, readings, new String[] { field }, 1L, 0, -1, tags, roles, langs,

    assertThat(expected).hasCauseThat().isEqualTo(cause);

    Object newValue = new Object();
    valueRef.set(newValue);
    assertSame(newValue, cache.getUnchecked(new Object()));
  }

  public void testGetUnchecked_unchecked() {
    final RuntimeException cause = new RuntimeException();
    final AtomicReference<Object> valueRef = new AtomicReference<>();

    SomeCheckedException cause = new SomeCheckedException();
    SomeChainingException exception = new SomeChainingException(new SomeChainingException(cause));
    assertSame(cause, getRootCause(exception));
  }

  public void testGetRootCause_loop() {
    Exception cause = new Exception();
    Exception exception = new Exception(cause);
    cause.initCause(exception);
    IllegalArgumentException expected =

        if (paramList == null) {
            paramList = new ArrayList<>();
        }
        paramList.add(encode(key) + "=" + encode(value));
        return this;
    }

    public CurlRequest header(final String key, final String value) {
        if (headerList == null) {
            headerList = new ArrayList<>();
        }
        headerList.add(new String[] { key, value });
        return this;
    }

                                    inputStream.reset();
                                    br = new BufferedReader(new InputStreamReader(inputStream, enc));
                                } else {
                                    br = new BufferedReader(new InputStreamReader(new FileInputStream(tempFile), enc));
                                }
                                String line;

        final Deferred<SuggestResponse> deferred = new Deferred<>();

        Thread th = new Thread(() -> {
            try {
                Thread.sleep(1000);
            } catch (InterruptedException ignore) {}
            deferred.resolve(new SuggestResponse("", 0, Collections.emptyList(), 0, null));
        });
        th.start();

        final CountDownLatch latch = new CountDownLatch(1);

    assertSuppressed(
        new Suppression(c2, tryException, c2Exception),
        new Suppression(c1, tryException, c1Exception));
  }

  public void testErrors() throws IOException {
    Closer closer = new Closer(suppressor);

    Error c1Exception = new Error();
    Error c2Exception = new Error();
    Error c3Exception = new Error();