added some things, v2.25.4

satella/coding/structures/singleton.py

@@ -61,7 +61,8 @@ def SingletonWithRegardsTo(num_args: int, weak_refs: bool = False):
     :param weak_refs: if True, then singleton will be stored within a weak dictionary, so that it cleans up after itself
                       when the values are gone.
 
-    .. warning:: If you set weak_refs to False and have a potentially unbounded number of arguments, you better watch out.
+    .. warning:: If you set weak_refs to False and have a potentially unbounded number of argument values, you better
+                 watch out for the memory usage.
     """
 
     def inner(cls):

satella/files.py

@@ -63,8 +63,7 @@ def __enter__(self):
 
     def __exit__(self, exc_type, exc_val, exc_tb):
         assert self.prev_path is not None
-        with reraise_as(FileNotFoundError):
-            os.chdir(self.prev_path)
+        os.chdir(self.prev_path)
         return False
 
 

satella/instrumentation/memory/get_object_size.py

@@ -1,3 +1,4 @@
+import platform
 import sys
 
 
@@ -11,10 +12,9 @@ def get_size(obj, seen=None) -> int:
     :return: size in bytes of the object and all of it's subcomponents
     :raises RuntimeError: when ran on PyPy
     """
-    try:
-        size = sys.getsizeof(obj)
-    except TypeError:
-        raise RuntimeError('Running on PyPy?')
+    if platform.python_implementation() != 'CPython':
+        raise RuntimeError('Runnable only on CPython')
+    size = sys.getsizeof(obj)
     if seen is None:
         seen = set()
     obj_id = id(obj)

tests/test_files.py

@@ -20,7 +20,6 @@ def test_monotonous(self):
         with jump_to_directory('test_d/path'):
             path = os.getcwd()
             self.assertTrue(path.endswith('path'))
-            self.assertTrue(os.path.exists('path'))
 
     def test_read_nonexistent_file(self):
         self.assertRaises(FileNotFoundError, lambda: read_in_file('moot'))

tests/test_instrumentation/test_memory.py

@@ -22,16 +22,19 @@ def can_fire(self, *args) -> bool:
 
 
 class TestMemory(unittest.TestCase):
-    @unittest.skipIf(platform.python_implementation(), 'This will not work on PyPy')
     def test_get_size_dict(self):
         a = {'aba': 'aba'}
 
         class Aba:
             def __init__(self):
                 self.aba = 'aba'
 
-        self.assertGreater(get_size(a), 6)
-        self.assertGreater(get_size(Aba()), 6)
+        if platform.python_implementation() == 'PyPy':
+            self.assertRaises(RuntimeError, get_size, a)
+            self.assertRaises(RuntimeError, get_size, Aba())
+        else:
+            self.assertGreater(get_size(a), 6)
+            self.assertGreater(get_size(Aba()), 6)
 
     @unittest.skipIf(sys.platform == 'win32', 'testable only on unices')
     def test_install_dump_on(self):