add no cache and ideal cache,

move printing cache reports to util file

tests/weighted_freind_readonly.py

@@ -0,0 +1,47 @@
+# Tests latency and hit rate of endpoints. Can be configured with weighted averages for various endpoints.
+
+import requests
+import random
+import json
+from tqdm import tqdm
+import time
+from utils import print_report
+
+baseurl = "http://localhost:8000"
+
+chance_of_selecting_friend = 0.7
+
+user_friends = json.loads(requests.get(baseurl + "/users_and_friends").content)
+user_ids = json.loads(requests.get(baseurl + "/users").content)["ids"]
+
+random.seed(0)
+
+def fetch_friend(prob):
+    return random.random() < prob
+
+def generate_random():
+    random_user = str(random.choice(user_ids))
+    return random_user
+
+def generate_random_friend(user):
+    next_user = str(random.choice(user_friends[user]))
+    return next_user
+
+times = []
+hits = []
+
+start = time.time()
+curr_user = generate_random()
+for i in tqdm(range(10000)):
+    url = baseurl + "/user/" + curr_user
+    response = requests.get(url)
+    content = json.loads(response.content)
+    times.append(content["time_ms"])
+    hits.append(content["source"] == "cache")
+    if fetch_friend(chance_of_selecting_friend):
+        curr_user = generate_random_friend(curr_user)
+    else:
+        curr_user = generate_random()
+end = time.time()
+
+print_report(hits, times, end - start)