Added first version of DebugManager. Implemented draft of the rule engine

tests/cache/test_cache.py

@@ -565,3 +565,35 @@ class TestCache(TestUsingMemoryBasedSheerka):
 
         cache.get(str(MAX_INITIALIZED_KEY + 1))
         assert len(cache._initialized_keys) == 1
+
+    def test_i_can_populate(self):
+        items = [("1", "1"), ("2", "2"), ("3", "3")]
+        cache = Cache()
+
+        cache.populate(lambda: items, lambda item: item[0])
+
+        assert len(cache) == 3
+        assert cache.get("1") == ("1", "1")
+        assert cache.get("2") == ("2", "2")
+        assert cache.get("3") == ("3", "3")
+
+    def test_max_size_is_respected_when_populate(self):
+        items = [("1", "1"), ("2", "2"), ("3", "3"), ("4", "4"), ("5", "5")]
+        cache = Cache(max_size=3)
+
+        cache.populate(lambda: items, lambda item: item[0])
+
+        assert len(cache) == 3
+        assert cache.get("3") == ("3", "3")
+        assert cache.get("4") == ("4", "4")
+        assert cache.get("5") == ("5", "5")
+
+    def test_i_can_get_all(self):
+        items = [("1", "1"), ("2", "2"), ("3", "3")]
+        cache = Cache()
+
+        cache.populate(lambda: items, lambda item: item[0])
+
+        res = cache.get_all()
+        assert len(res) == 3
+        assert list(res) == [('1', '1'), ('2', '2'), ('3', '3')]