Add test_session, add randomizers, move test_app, user/session fixtures

backend/linkpulse/tests/random.py

@@ -0,0 +1,15 @@
+import random
+import string
+import time
+
+
+def epoch() -> int:
+    return int(time.time())
+
+
+def random_string(length: int = 10) -> str:
+    return "".join(random.choices(string.ascii_lowercase + string.digits, k=length))
+
+
+def random_email() -> str:
+    return random_string() + str(epoch()) + "@example.com"