The response file contains whitespace-separated arguments with support for single-quoted and double-quoted strings, escape sequences, and backslash-newline line continuation.
The format is compatible with GCC's response file implementation to ensure interoperability with existing build systems.

### Go command {#go-command}

        params.put("quotes", "text with \"quotes\"");
        params.put("backslash", "text\\with\\backslash");
        activityHelper.print("test", OptionalThing.empty(), params);
        String result = localLogMsg.get();
        assertTrue(result.contains("\\\"quotes\\\""));
        assertTrue(result.contains("text\\\\with\\\\backslash"));
    }

    static class TestLoginCredential implements LoginCredential {

        monitorTarget.append(buf, "specialKey", supplier);
        assertEquals("\"specialKey\":\"test \\\"quotes\\\" and \\n newline\"", buf.toString());
    }

    // Test append method with String containing backslash
    @Test
    public void test_append_stringWithBackslash() {
        StringBuilder buf = new StringBuilder();
        Supplier<Object> supplier = () -> "path\\to\\file";

#
#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
#   set -- "${ARGS[@]}" "$@"
#
# but POSIX shell has neither arrays nor command substitution, so instead we
# post-process each arg (as a line of input to sed) to backslash-escape any
# character that might be a shell metacharacter, then use eval to reverse
# that process (while maintaining the separation between arguments), and wrap
# the whole thing up as a single "set" statement.
#

    }

    @Test
    public void test_escapeLDAPSearchFilter_withBackslash() {
        LdapManager ldapManager = new LdapManager();
        ldapManager.init();

        // Backslash should be escaped to \5c
        assertEquals("\\5c", ldapManager.escapeLDAPSearchFilter("\\"));
        assertEquals("test\\5cvalue", ldapManager.escapeLDAPSearchFilter("test\\value"));

    }

    @Test
    public void test_unescape_withBackslash() {
        String content = "word\\n1\n" + // word + n + 1
                "word\\\n"; // word + (nothing after backslash)

        InputStream is = new ByteArrayInputStream(content.getBytes(StandardCharsets.UTF_8));
        stopwordsFile.reload(null, is);

        assertEquals(2, stopwordsFile.stopwordsItemList.size());

        // Parentheses injection attempt
        assertEquals("cn=admin\\29\\28cn=\\2a,dc=example,dc=com", fessConfig.getLdapSecurityPrincipal("admin)(cn=*"));

        // Backslash
        assertEquals("cn=admin\\5ctest,dc=example,dc=com", fessConfig.getLdapSecurityPrincipal("admin\\test"));
    }

    @Test
    public void test_getLdapAdminUserFilter_escapesSpecialChars() {

        source.put("title", "Title with \"quotes\" and \\backslash");
        source.put("content", "Line1\nLine2\tTabbed");

        final String json = new JsonIndexExportFormatter().format(source, Collections.emptySet());

        assertTrue(json.contains("\\\"quotes\\\""));
        assertTrue(json.contains("\\\\backslash"));
        assertTrue(json.contains("\\n"));
        assertTrue(json.contains("\\t"));

        final PrintWriter writer = new PrintWriter(stringWriter);

        chatApiManager.sendSseEvent(writer, "chunk", Map.of("content", "Special chars: \"quotes\" and \\ backslash"));

        final String output = stringWriter.toString();
        assertTrue(output.contains("event: chunk"));
        // JSON should properly escape special characters
        assertTrue(output.contains("data:"));

</p>

<p>
Several backslash escapes allow arbitrary values to be encoded as
ASCII text.  There are four ways to represent the integer value
as a numeric constant: <code>\x</code> followed by exactly two hexadecimal
digits; <code>\u</code> followed by exactly four hexadecimal digits;
<code>\U</code> followed by exactly eight hexadecimal digits, and a
plain backslash <code>\</code> followed by exactly three octal digits.