**Key Test Areas**:
- Enhanced error messages
- Partial extraction (continues on failure)
- Invalid archive handling
- Empty archive handling
- Mixed valid/invalid entries

**Covered Extractors**:
- ZipExtractor
- TarExtractor

**Test Count**: 12 tests

**Key Scenarios**:
- ✅ Descriptive error messages for invalid archives
- ✅ Continues processing when some entries fail
- ✅ Handles empty archives gracefully

        context[2] = 0x98BADCFE;
        context[3] = 0x10325476;
        count = 0L;
        for (int i = 0; i < BLOCK_LENGTH; i++) {
            buffer[i] = 0;
        }
    }

    /**
     * Continues an MD4 message digest using the input byte.
     */
    @Override
    public void engineUpdate(final byte b) {
        // compute number of bytes still unhashed; ie. present in buffer

            if (pattern.isEmpty() || pattern.charAt(pattern.length() - 1) != '$') {
                // This makes "/fish" match "/fish", "/fishing", "/fish/", etc.
                // No need to add anything - the pattern naturally continues
            }

            return Pattern.compile(regex.toString());
        }

        /**
         * Calculates the priority length for this pattern.

            verify(session).setAttribute("ntlmuser", "user");
            verify(session).setAttribute("ntlmdomain", "TEST_DOMAIN");

            // Verify that the chain continues
            verify(response, never()).setStatus(HttpServletResponse.SC_UNAUTHORIZED);
        }
    }

    /**
     * Test the service method with NTLM authentication that fails.

- Background temp file deletion via `FileUtil.deleteInBackground()`

**Fault Tolerance**:
- `FaultTolerantClient` wrapper (retry, circuit breaker)
- Graceful degradation (e.g., robots.txt parsing continues on errors)

---

## Key Components

### Crawler (`Crawler.java`)

Main orchestrator for crawling operations.

**Key Methods**:
```java

        // Verify filter called once per entry
        verify(filter, times(3)).accept(any());
    }

    @Test
    @DisplayName("Filter throws CIFSException: entry is skipped and iteration continues")
    void filterThrows_skipsAndContinues() throws Exception {
        SmbFile parent = newParent();
        List<FileEntry> entries = Arrays.asList(entry("bad", SmbConstants.TYPE_SHARE), entry("good", SmbConstants.TYPE_SHARE));

            crawlerContext.activeThreadCount--;
        }
    }

    /**
     * Checks if the crawling process should continue.
     * @param tcCount The thread check count.
     * @return true if the crawling should continue, false otherwise.
     */
    protected boolean isContinue(final int tcCount) {
        if (!crawlerContainer.available()) {
            // system shutdown

                                // Ignore invalid crawl-delay values (non-numeric)
                                // This allows parsing to continue with other directives
                            }
                        }
                        continue;
                    }

                    // Try to parse as Sitemap directive
                    value = getValue(SITEMAP_RECORD, line);

        // are handled in the switch statement's default case which continues the loop
        byte[] data = new byte[] { 1, 2 };

        // Use a type that's not SESSION_MESSAGE or SESSION_KEEP_ALIVE
        byte[] unknownHeader = new byte[] { (byte) 0x90, 0, 0, 0 };

        byte[] fullData = concat(unknownHeader, // Unknown packet type - will continue to next packet
                messageHeader(2), data);

                    continue;
                }
            }
            try (SmbResource nr = adapt(n)) {
                if (!this.filter.accept(nr)) {
                    continue;
                }
                return nr;
            } catch (final CIFSException e) {
                log.error("Failed to apply filter", e);
                continue;
            } catch (final MalformedURLException e) {