rudimentary cache decorator

tests/test_cache.py

@@ -1,3 +1,4 @@
+import scgenerator.cache as scc
 from scgenerator.cache import Cache
 
 
@@ -57,3 +58,31 @@ def test_toml():
     cache1.delete()
     assert not cache1.dir.exists()
     assert not cache3.dir.exists()
+
+
+def test_decorator():
+    cache = Cache("Test")
+    cache.delete()
+    call_count = 0
+
+    @cache()
+    def func(x: str) -> str:
+        nonlocal call_count
+        call_count += 1
+        return x + x
+
+    @cache(lambda li: f"{li[0]}-{li[-1]} {len(li)}")
+    def func2(some_list: list):
+        nonlocal call_count
+        call_count += 1
+        return sum(some_list)
+
+    assert func("hello") == "hellohello"
+    assert func2([0, 1, 2, 80]) == 83
+    assert func2([0, 1, 2, 80]) == 83
+
+    assert (scc.CACHE_DIR / "Test" / "test_decorator.<locals>.func hello").exists()
+    assert (scc.CACHE_DIR / "Test" / "test_decorator.<locals>.func2 0-80 4").exists()
+
+    assert call_count == 2
+    cache.delete()