Add UUID generator command

fixit/cli.py

@@ -1,6 +1,7 @@
 """Command line entry point: `fixit <command>`."""
 import argparse
 import sys
+import uuid
 
 from fixit import __version__, convert, jsonfmt, password, textutils, wordcount
 
@@ -28,6 +29,9 @@ def build_parser() -> argparse.ArgumentParser:
     pw.add_argument("--length", type=int, default=12)
     pw.add_argument("--symbols", action="store_true")
 
+    uid = sub.add_parser("uuid", help="generate UUIDs")
+    uid.add_argument("--count", type=int, default=1)
+
     js = sub.add_parser("json", help="pretty-print JSON")
     js.add_argument("raw")
 
@@ -49,6 +53,9 @@ def main(argv=None) -> int:
         print(CONVERSIONS[args.kind](args.value))
     elif args.command == "password":
         print(password.generate(args.length, use_symbols=args.symbols))
+    elif args.command == "uuid":
+        for _ in range(args.count):
+            print(uuid.uuid4())
     elif args.command == "json":
         print(jsonfmt.format_json(args.raw))
     elif args.command == "palindrome":

tests/test_uuid.py

@@ -0,0 +1,13 @@
+from uuid import UUID
+
+import pytest
+
+from fixit.cli import main
+
+
+def test_uuid_command_prints_requested_number_of_uuid4_values(capsys):
+    main(["uuid", "--count", "3"])
+
+    values = capsys.readouterr().out.splitlines()
+    assert len(values) == 3, f"expected 3 UUIDs, got {len(values)}"
+    assert all(UUID(value).version == 4 for value in values)