XTEST
text/plain
Magic Bytes
Offset: 0
54 68 69 73 20 69 73 20 54 65 58 2C
XTEST is a diagnostic text format originally developed by the TeX community for verifying typesetting engine consistency and system performance. It is primarily utilized for automated testing of mathematical typography software, ensuring that document rendering remains uniform across different operating environments and compiler versions. As a plain text-based legacy format, it poses minimal security risks, though it has largely been superseded by modern unit testing frameworks within the broader LaTeX and TeX ecosystems.
Validation Code
How to validate .xtest files in Python
Python
def is_xtest(file_path: str) -> bool:
"""Check if file is a valid XTEST by magic bytes."""
signature = bytes([0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x54, 0x65, 0x58, 0x2C])
with open(file_path, "rb") as f:
return f.read(12) == signatureHow to validate .xtest files in Node.js
Node.js
function isXTEST(buffer: Buffer): boolean {
const signature = Buffer.from([0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x54, 0x65, 0x58, 0x2C]);
return buffer.subarray(0, 12).equals(signature);
}
Go
func IsXTEST(data []byte) bool {
signature := []byte{0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x54, 0x65, 0x58, 0x2C}
if len(data) < 12 {
return false
}
return bytes.Equal(data[:12], signature)
}API Endpoint
GET
/api/v1/xtest
curl https://filesignature.org/api/v1/xtest