tests — fuzz

tests — fuzz

This document provides an overview of the tests/fuzz/input-fuzzer.test.ts module, which focuses on fuzz testing for user input handling.

Module Overview

The input-fuzzer.test.ts module is dedicated to ensuring the robustness and security of input processing functions against a wide range of potentially malformed, malicious, or unexpected user inputs. It implements a form of fuzz testing by defining and testing two core input handling utilities: sanitizeInput and parseCommand.

The primary goal is to identify vulnerabilities or unexpected behaviors (e.g., crashes, incorrect parsing, XSS vectors) when these functions are exposed to diverse and challenging data. This module addresses "Item 88," indicating a specific requirement or task related to input validation and security.

Core Input Handling Functions

This module defines and tests two critical functions for processing user input. It's important to note that these functions are currently defined within this test file, implying they are either prototypes, examples, or functions under active development and testing before being potentially extracted into a shared utility module.

sanitizeInput(input: string): string

This function is responsible for cleaning and normalizing user-provided string input to prevent common security vulnerabilities and ensure data integrity.

Purpose: To remove potentially harmful characters, script tags, and enforce length constraints on user input.

Behavior:

1. Type Check: If the input is not a string, it returns an empty string immediately.
2. Control Character Removal: Strips all ASCII control characters (bytes \x00 through \x1F and \x7F). This prevents issues like null byte injection or terminal control sequence manipulation.
3. Script Tag Stripping: Removes HTML