tests: deque

src/tests/test_deque.py

@@ -0,0 +1,48 @@
+from __future__ import annotations
+
+import pytest
+
+from typed_diskcache import exception as te
+from typed_diskcache.core.types import EvictionPolicy
+from typed_diskcache.utils.deque import Deque
+
+pytestmark = pytest.mark.anyio
+
+
+@pytest.fixture
+def deque(cache_directory):
+    deque = Deque(directory=cache_directory)
+    try:
+        yield deque
+    finally:
+        deque.cache.close()
+
+
+@pytest.mark.parametrize(
+    ("maxlen", "expected"), [(None, float("inf")), (1, 1), (10, 10)]
+)
+def test_attributes(cache_directory, maxlen, expected):
+    deque = Deque(directory=cache_directory, maxlen=maxlen)
+    assert deque.cache.directory == cache_directory
+    assert deque.maxlen == expected
+
+
+@pytest.mark.parametrize("eviction_policy", [x for x in EvictionPolicy if x != "none"])
+def test_eviction_warning(cache_directory, eviction_policy):
+    with pytest.warns(te.TypedDiskcacheWarning):
+        Deque(directory=cache_directory, eviction_policy=eviction_policy)
+
+
+def test_set_maxlen(deque):
+    assert deque.maxlen == float("inf")
+    deque.extendleft("abcde")
+    deque.maxlen = 3
+    assert deque.maxlen == 3
+    assert list(deque) == ["c", "b", "a"]
+
+
+def test_append(deque):
+    deque.append("a")
+    deque.append("b")
+    deque.append("c")
+    assert list(deque) == ["a", "b", "c"]

src/typed_diskcache/utils/deque.py

@@ -2,6 +2,7 @@
 
 import operator as op
 import shutil
+import warnings
 from collections.abc import Callable, Iterable, Iterator, MutableSequence, Sequence
 from contextlib import suppress
 from functools import partial
@@ -79,7 +80,11 @@ def __init__(
     ) -> None:
         eviction_policy = kwargs.pop("eviction_policy", EvictionPolicy.NONE)
         if eviction_policy != EvictionPolicy.NONE:
-            logger.warning("Deque eviction policy must be none")
+            warnings.warn(
+                "Deque eviction policy must be none",
+                te.TypedDiskcacheWarning,
+                stacklevel=2,
+            )
 
         kwargs["eviction_policy"] = EvictionPolicy.NONE
         self._cache = Cache(directory=directory, **kwargs)
@@ -116,7 +121,7 @@ def main() -> None:
                 deque.extendleft("abcde")
                 deque.maxlen = 3
                 print(list(deque))
-                # ['c', 'd', 'e']
+                # ['c', 'b', 'a']
             ```
         """
         self._maxlen = value