TestCharSink failSink = new TestCharSink(WRITE_THROWS);
    assertThrows(IOException.class, () -> new TestCharSource(STRING).copyTo(failSink));
    assertTrue(failSink.wasStreamClosed());
  }

  public void testClosesOnErrors_whenWritingFromReaderThatThrows() {
    TestCharSink okSink = new TestCharSink();
    assertThrows(IOException.class, () -> okSink.writeFrom(new TestReader(READ_THROWS)));

            return 0L;
        }
        public String toString() {
            return new String( "SmbQueryFileBasicInfo[" +
                "createTime=" + new Date( createTime ) +
                ",lastAccessTime=" + new Date( lastAccessTime ) +
                ",lastWriteTime=" + new Date( lastWriteTime ) +
                ",changeTime=" + new Date( changeTime ) +
                ",attributes=0x" + Hexdump.toHexString( attributes, 4 ) + "]" );

        to.parents.remove(from);
    }

    List<String> visitAll() {
        return visitAll(vertices.values(), new HashMap<>(), new ArrayList<>());
    }

    List<String> findCycle(Vertex vertex) {
        return visitCycle(Collections.singleton(vertex), new HashMap<>(), new LinkedList<>());
    }

    private static List<String> visitAll(

	if !a.Enable {
		return nil
	}
	if a.URL.IsEmpty() {
		return errors.New("empty URL")
	}
	if a.Format != "" {
		f := strings.ToLower(a.Format)
		if f != event.NamespaceFormat && f != event.AccessFormat {
			return errors.New("format value unrecognized")
		}
	}
	if a.Index == "" {
		return errors.New("empty index value")
	}

        ThumbnailQueueCQ cq = new ThumbnailQueueCQ();
        if (queryLambda != null) {
            queryLambda.callback(cq);
        }
        FilterAggregationBuilder builder = regFilterA(name, cq.getQuery());
        if (opLambda != null) {
            opLambda.callback(builder);
        }
        if (aggsLambda != null) {
            ThumbnailQueueCA ca = new ThumbnailQueueCA();
            aggsLambda.callback(ca);

            ListTestSuiteBuilder.using(new BytesAsListGenerator()).named("Bytes.asList"),
            ListTestSuiteBuilder.using(new BytesAsListHeadSubListGenerator())
                .named("Bytes.asList, head subList"),
            ListTestSuiteBuilder.using(new BytesAsListTailSubListGenerator())
                .named("Bytes.asList, tail subList"),
            ListTestSuiteBuilder.using(new BytesAsListMiddleSubListGenerator())

            ListTestSuiteBuilder.using(new LongsAsListGenerator()).named("Longs.asList"),
            ListTestSuiteBuilder.using(new LongsAsListHeadSubListGenerator())
                .named("Longs.asList, head subList"),
            ListTestSuiteBuilder.using(new LongsAsListTailSubListGenerator())
                .named("Longs.asList, tail subList"),
            ListTestSuiteBuilder.using(new LongsAsListMiddleSubListGenerator())

        TransferResource resource = event.getResource();
        long contentLength = event.getTransferredBytes();
        FileSizeFormat format = new FileSizeFormat();

        StringBuilder message = new StringBuilder();
        message.append(action).append(' ').append(direction).append(' ').append(resource.getRepositoryId());
        message.append(": ");

        // make copy to get rid of needless overhead for dynamic lookups
        this.eventSpies = new ArrayList<>(eventSpies);
    }

    public ExecutionListener chainListener(ExecutionListener listener) {
        if (eventSpies.isEmpty()) {
            return listener;
        }
        return new EventSpyExecutionListener(this, listener);
    }

	}

	return rulesCopy
}

// Union - returns union with given rules as new rules.
func (rules Rules) Union(rules2 Rules) Rules {
	nrules := rules.Clone()

	for pattern, targetIDSet := range rules2 {
		nrules[pattern] = nrules[pattern].Union(targetIDSet)
	}

	return nrules
}

// Difference - returns difference with given rules as new rules.
func (rules Rules) Difference(rules2 Rules) Rules {
	nrules := make(Rules)