Naughty-Strings

Useful for testing applications against special characters, invisible white space, emojis, etc...

From github: https://github.com/minimaxir/big-list-of-naughty-strings/blob/master/blns.txt

Usage

const strings = require('naughty-strings');

console.log(strings.emoji()); = '😍'

If a number is passed into the function call it will return an array with the number of elements.

function reservedStrings(number) {}
Strings which may be used elsewhere in code

function numericStrings(number) {}
Strings which can be interpreted as numeric

function specialCharacters(number) {}
ASCII punctuation. All of these characters may need to be escaped in some
contexts. Divided into three groups based on (US-layout) keyboard position.

function nonWhitespaceC0ControlsU0001ThroughU0008U000EThroughU001F(number) {}
and U+007F (DEL)
Often forbidden to appear in various text-based file formats (e.g. XML),
or reused for internal delimiters on the theory that they should never
appear in input.
The next line may appear to be blank or mojibake in some viewers.

function nonWhitespaceC1ControlsU0080ThroughU0084AndU0086ThroughU009F(number) {}
Commonly misinterpreted as additional graphic characters.
The next line may appear to be blank, mojibake, or dingbats in some viewers.

function whitespaceAllOfTheCharactersWithCategoryZsZlOrZpInUnicode(number) {}
version 8.0.0), plus U+0009 (HT), U+000B (VT), U+000C (FF), U+0085 (NEL),
and U+200B (ZERO WIDTH SPACE), which are in the C categories but are often
treated as whitespace in some contexts.
This file unfortunately cannot express strings containing
U+0000, U+000A, or U+000D (NUL, LF, CR).
The next line may appear to be blank or mojibake in some viewers.
The next line may be flagged for "trailing whitespace" in some viewers.

function unicodeAdditionalControlCharactersAllOfTheCharactersWith(number) {}
general category Cf (in Unicode 8.0.0).
The next line may appear to be blank or mojibake in some viewers.

function byteOrderMarksUFeffAndUFffeEachOnItsOwnLine(number) {}
The next two lines may appear to be blank or mojibake in some viewers.

function unicodeSymbols(number) {}
Strings which contain common unicode symbols (e.g. smart quotes)

function unicodeSubscriptSuperscriptAccents(number) {}
Strings which contain unicode subscripts/superscripts; can cause rendering issues

function quotationMarks(number) {}
Strings which contain misplaced quotation marks; can cause encoding errors

function twoByteCharacters(number) {}
Strings which contain two-byte characters: can cause rendering issues or character-length issues

function specialUnicodeCharactersUnion(number) {}
A super string recommended by VMware Inc. Globalization Team: can effectively cause rendering issues or character-length issues to validate product globalization readiness.
表          CJK_UNIFIED_IDEOGRAPHS (U+8868)
ポ          KATAKANA LETTER PO (U+30DD)
あ          HIRAGANA LETTER A (U+3042)
A           LATIN CAPITAL LETTER A (U+0041)
鷗          CJK_UNIFIED_IDEOGRAPHS (U+9DD7)
Π          LATIN SMALL LIGATURE OE (U+0153) 
é           LATIN SMALL LETTER E WITH ACUTE (U+00E9)
Ｂ           FULLWIDTH LATIN CAPITAL LETTER B (U+FF22)
逍          CJK_UNIFIED_IDEOGRAPHS (U+900D)
Ü           LATIN SMALL LETTER U WITH DIAERESIS (U+00FC)
ß           LATIN SMALL LETTER SHARP S (U+00DF)
ª           FEMININE ORDINAL INDICATOR (U+00AA)
ą           LATIN SMALL LETTER A WITH OGONEK (U+0105)
ñ           LATIN SMALL LETTER N WITH TILDE (U+00F1)
丂          CJK_UNIFIED_IDEOGRAPHS (U+4E02)
㐀          CJK Ideograph Extension A, First (U+3400)
𠀀          CJK Ideograph Extension B, First (U+20000)

function japaneseEmoticons(number) {}
Strings which consists of Japanese-style emoticons which are popular on the web

function emoji(number) {}
Strings which contain Emoji; should be the same behavior as two-byte characters, but not always

function regionalIndicatorSymbols(number) {}
Regional Indicator Symbols can be displayed differently across
fonts, and have a number of special behaviors

function unicodeNumbers(number) {}
Strings which contain unicode numbers; if the code is localized, it should see the input as numeric

function rightToLeftStrings(number) {}
Strings which contain text that should be rendered RTL if possible (e.g. Arabic, Hebrew)

function trickUnicode(number) {}
Strings which contain unicode with unusual properties (e.g. Right-to-left override) (c.f. http://www.unicode.org/charts/PDF/U2000.pdf)

function zalgoText(number) {}
Strings which contain "corrupted" text. The corruption will not appear in non-HTML text, however. (via http://www.eeemo.net)

function unicodeUpsidedown(number) {}
Strings which contain unicode with an "upsidedown" effect (via http://www.upsidedowntext.com)

function unicodeFont(number) {}
Strings which contain bold/italic/etc. versions of normal characters

function scriptInjection(number) {}
Strings which attempt to invoke a benign script injection; shows vulnerability to XSS

function sqlInjection(number) {}
Strings which can cause a SQL injection if inputs are not sanitized

function serverCodeInjection(number) {}
Strings which can cause user to run code on server as a privileged user (c.f. https://news.ycombinator.com/item?id=7665153)

function commandInjectionRuby(number) {}
Strings which can call system commands within Ruby/Rails applications

function xxeInjectionXml(number) {}
String which can reveal system files when parsed by a badly configured XML parser

function unwantedInterpolation(number) {}
Strings which can be accidentally expanded into different strings if evaluated in the wrong context, e.g. used as a printf format string or via Perl or shell eval. Might expose sensitive data from the program doing the interpolation, or might just represent the wrong string.

function fileInclusion(number) {}
Strings which can cause user to pull in files that should not be a part of a web server

function knownCvEsAndVulnerabilities(number) {}
Strings that test for known vulnerabilities

function msdosWindowsSpecialFilenames(number) {}
Strings which are reserved characters in MSDOS/Windows

function ircSpecificStrings(number) {}
Strings that may occur on IRC clients that make security products freak out

function scunthorpeProblem(number) {}
Innocuous strings which may be blocked by profanity filters (https://en.wikipedia.org/wiki/Scunthorpe_problem)

function humanInjection(number) {}
Strings which may cause human to reinterpret worldview

function terminalEscapeCodes(number) {}
Strings which punish the fools who use cat/type on this file