File size: 3,080 Bytes
2c3c408 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | from __future__ import annotations
from __future__ import unicode_literals
import pytest
from textual._cache import LRUCache
def test_lru_cache():
cache = LRUCache(3)
# insert some values
cache["foo"] = 1
cache["bar"] = 2
cache["baz"] = 3
assert "foo" in cache
assert "bar" in cache
assert "baz" in cache
# Cache size is 3, so the following should kick oldest one out
cache["egg"] = 4
assert "foo" not in cache
assert "egg" in cache
# cache is now full
# look up two keys
cache["bar"]
cache["baz"]
# Insert a new value
cache["eggegg"] = 5
assert len(cache) == 3
# Check it kicked out the 'oldest' key
assert "egg" not in cache
assert "eggegg" in cache
def test_lru_cache_get():
cache = LRUCache(3)
# insert some values
cache["foo"] = 1
cache["bar"] = 2
cache["baz"] = 3
assert "foo" in cache
# Cache size is 3, so the following should kick oldest one out
cache["egg"] = 4
# assert len(cache) == 3
assert cache.get("foo") is None
assert "egg" in cache
# cache is now full
# look up two keys
cache.get("bar")
cache.get("baz")
# Insert a new value
cache["eggegg"] = 5
# Check it kicked out the 'oldest' key
assert "egg" not in cache
assert "eggegg" in cache
def test_lru_cache_mapping():
"""Test cache values can be set and read back."""
cache = LRUCache(3)
cache["foo"] = 1
cache.set("bar", 2)
cache.set("baz", 3)
assert cache["foo"] == 1
assert cache["bar"] == 2
assert cache.get("baz") == 3
def test_lru_cache_clear():
cache = LRUCache(3)
assert len(cache) == 0
cache["foo"] = 1
assert "foo" in cache
assert len(cache) == 1
cache.clear()
assert "foo" not in cache
assert len(cache) == 0
def test_lru_cache_bool():
cache = LRUCache(3)
assert not cache
cache["foo"] = "bar"
assert cache
@pytest.mark.parametrize(
"keys,expected",
[
((), ()),
(("foo",), ("foo",)),
(("foo", "bar"), ("foo", "bar")),
(("foo", "bar", "baz"), ("foo", "bar", "baz")),
(("foo", "bar", "baz", "egg"), ("bar", "baz", "egg")),
(("foo", "bar", "baz", "egg", "bob"), ("baz", "egg", "bob")),
],
)
def test_lru_cache_evicts(keys: list[str], expected: list[str]):
"""Test adding adding additional values evicts oldest key"""
cache = LRUCache(3)
for value, key in enumerate(keys):
cache[key] = value
assert tuple(cache.keys()) == expected
@pytest.mark.parametrize(
"keys,expected_len",
[
((), 0),
(("foo",), 1),
(("foo", "bar"), 2),
(("foo", "bar", "baz"), 3),
(("foo", "bar", "baz", "egg"), 3),
(("foo", "bar", "baz", "egg", "bob"), 3),
],
)
def test_lru_cache_len(keys: list[str], expected_len: int):
"""Test adding adding additional values evicts oldest key"""
cache = LRUCache(3)
for value, key in enumerate(keys):
cache[key] = value
assert len(cache) == expected_len
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