Better tests

tests/test_nocache.py

@@ -1,13 +1,19 @@
 from perscache import NoCache
+import asyncio
 
 def test_no_cache_with_parentheses():
-
+    counter = 0
     cache = NoCache()
     @cache()
     def dummy_func():
+        nonlocal counter
+        counter += 1
         return 'NoCache with parentheses'
 
     assert dummy_func() == 'NoCache with parentheses'
+    assert dummy_func() == 'NoCache with parentheses'
+    assert counter == 2
+
 
 def test_no_cache_without_parentheses():
     cache = NoCache()
@@ -17,3 +23,23 @@ def dummy_func():
         return 'NoCache without parentheses'
 
     assert dummy_func() == 'NoCache without parentheses'
+
+
+async def test_no_cache_with_parentheses_async():
+    cache = NoCache()
+
+    @cache()
+    async def dummy_func():
+        return 'NoCache with parentheses async'
+
+    assert await dummy_func() == 'NoCache with parentheses async'
+
+
+async def test_no_cache_without_parentheses_async():
+    cache = NoCache()
+
+    @cache
+    async def dummy_func():
+        return 'NoCache without parentheses async'
+
+    assert await dummy_func() == 'NoCache without parentheses async'