Wrote a python script for generating random Rust byte arrays.

.vscode/launch.json

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+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Python: Current File",
+            "type": "python",
+            "request": "launch",
+            "program": "${file}",
+            "console": "integratedTerminal",
+            "justMyCode": true,
+            "args": []
+        }
+    ]
+}

tools/rand_array.py

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+#!/usr/bin/env python3
+'''
+This script generates a rust array filled with random bytes.
+'''
+
+import random
+import unittest
+import sys
+
+LINESEP = "\n"
+
+def better_hex(byte: int) -> str:
+    return "0x{:02X}".format(byte)
+
+def make_array(bytes: bytes, col_limit: int = 100, indent: int = 4) -> str:
+    indent_str = " " * (indent - 1)
+    output = "[" + LINESEP
+    line = indent_str
+    for byte in bytes:
+        next = " " + better_hex(byte) + ","
+        if len(line) + len(next) >= col_limit:
+            output += line + LINESEP
+            line = indent_str
+        line += next
+    output += line + LINESEP + "];"
+    return output
+
+class TestMakeArray(unittest.TestCase):
+    def test_make_array(self):
+        bytes = b"\x8b!\xe9z\x14\xbc\xc6\xef\xf9(Y\xd5\xbd\xe8\xfb\x8a\x13I\xea,\xac\x9b\x7f\xf18\x8b\x94\x81\xe3\xf9!\xcc"
+        expected = '''[
+    0x8B, 0x21, 0xE9, 0x7A, 0x14, 0xBC, 0xC6, 0xEF, 0xF9, 0x28, 0x59, 0xD5, 0xBD, 0xE8, 0xFB, 0x8A,
+    0x13, 0x49, 0xEA, 0x2C, 0xAC, 0x9B, 0x7F, 0xF1, 0x38, 0x8B, 0x94, 0x81, 0xE3, 0xF9, 0x21, 0xCC,
+];'''
+        actual = make_array(bytes)
+        self.assertEqual(expected, actual)
+
+if __name__ == "__main__":
+    if len(sys.argv) < 2:
+        unittest.main()
+    else:
+        length = int(sys.argv[1])
+        bytes = random.randbytes(length)
+        array = make_array(bytes)
+        print(array)