implement shuffle benchmark

tests/test_benchmark.py

@@ -0,0 +1,15 @@
+from src.benchmark import passcode_generator
+import pytest
+
+@pytest.mark.parametrize(
+    "k, p, n, c, d, runs",
+    [
+        (6, 9, 4, 4, 4, 100)
+    ]
+)
+def test_passcode_generator(k, p, n, c, d, runs):
+    for _ in range(runs):
+        passcode = passcode_generator(k=k, p=p, n=n, c=c, d=d)
+        passcode_sets = [el//p for el in passcode]
+        assert  c <= len(set(passcode))
+        assert d <= len(set(passcode_sets))