From 8113ff8705da4debab7638e305a8a7cedd9b1e3a Mon Sep 17 00:00:00 2001
From: Will McGugan <willmcgugan@gmail.com>
Date: Wed, 28 Dec 2022 15:44:56 +0000
Subject: [PATCH] moar tests

---
 src/textual/_cache.py |  4 ++--
 tests/test_cache.py   | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+), 2 deletions(-)

diff --git a/src/textual/_cache.py b/src/textual/_cache.py
index 3127bd22d..2698c4228 100644
--- a/src/textual/_cache.py
+++ b/src/textual/_cache.py
@@ -14,7 +14,7 @@ where the overhead of the cache is a small fraction of the total processing time
 
 from __future__ import annotations
 
-from typing import cast, Dict, Generic, KeysView, TypeVar, overload
+from typing import Dict, Generic, KeysView, TypeVar, overload
 
 CacheKey = TypeVar("CacheKey")
 CacheValue = TypeVar("CacheValue")
@@ -71,7 +71,7 @@ class LRUCache(Generic[CacheKey, CacheValue]):
 
     def __repr__(self) -> str:
         return (
-            f"<LRUCache maxsize={self._maxsize} hits={self.hits} misses={self.misses}"
+            f"<LRUCache maxsize={self._maxsize} hits={self.hits} misses={self.misses}>"
         )
 
     def grow(self, maxsize: int) -> None:
diff --git a/tests/test_cache.py b/tests/test_cache.py
index 9a4bb2ef3..86d7139f0 100644
--- a/tests/test_cache.py
+++ b/tests/test_cache.py
@@ -9,6 +9,8 @@ from textual._cache import FIFOCache, LRUCache
 def test_lru_cache():
     cache = LRUCache(3)
 
+    assert str(cache) == "<LRUCache maxsize=3 hits=0 misses=0>"
+
     # insert some values
     cache["foo"] = 1
     cache["bar"] = 2
@@ -35,6 +37,38 @@ def test_lru_cache():
     assert "eggegg" in cache
 
 
+def test_lru_cache_hits():
+    cache = LRUCache(4)
+    assert cache.hits == 0
+    assert cache.misses == 0
+
+    try:
+        cache["foo"]
+    except KeyError:
+        assert cache.hits == 0
+        assert cache.misses == 1
+
+    cache["foo"] = 1
+    assert cache.hits == 0
+    assert cache.misses == 1
+
+    cache["foo"]
+    cache["foo"]
+
+    assert cache.hits == 2
+    assert cache.misses == 1
+
+    cache.get("bar")
+    assert cache.hits == 2
+    assert cache.misses == 2
+
+    cache.get("foo")
+    assert cache.hits == 3
+    assert cache.misses == 2
+
+    assert str(cache) == "<LRUCache maxsize=4 hits=3 misses=2>"
+
+
 def test_lru_cache_get():
     cache = LRUCache(3)