added tmpdir

src/pwo/__init__.py

@@ -1,4 +1,11 @@
-from .private import format_filesize, async_retry, retry, async_test, ExceptionHandlerOutcome
+from .private import (
+    format_filesize,
+    async_retry,
+    retry,
+    async_test,
+    ExceptionHandlerOutcome,
+    tmpdir
+)
 from .maybe import Maybe
 
 __all__ = [
@@ -7,5 +14,6 @@ __all__ = [
     'retry',
     'async_test',
     'ExceptionHandlerOutcome',
-    'Maybe'
+    'Maybe',
+    'tmpdir'
 ]

src/pwo/private.py

@@ -1,4 +1,6 @@
 import math
+from tempfile import TemporaryDirectory
+from pathlib import Path
 from enum import Enum, auto
 from typing import Callable
 from time import sleep
@@ -17,7 +19,6 @@ def format_filesize(size: int) -> str:
     return '%.2f ' % (size / math.pow(1024, counter)) + _size_uoms[counter]
 
 
-
 class ExceptionHandlerOutcome(Enum):
     THROW = auto()
     CONTINUE = auto()
@@ -75,8 +76,23 @@ def async_retry(
 
     return wrapper
 
+
 def async_test(coro):
     def wrapper(*args, **kwargs):
         with Runner() as runner:
             runner.run(coro(*args, **kwargs))
+
+    return wrapper
+
+
+def tmpdir(argument_name='tmpdir'):
+    def wrapper(fun):
+        def result(*args, **kwargs):
+            with TemporaryDirectory() as temp_dir:
+                fun(*args, **kwargs, **{
+                    argument_name: Path(temp_dir)
+                })
+
+        return result
+
     return wrapper