adding utils unit test

Author: rafaelfsilva

tests/unit/test_utils.py

@@ -0,0 +1,44 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# Copyright (c) 2025 The WfCommons Team.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+import json
+import pathlib
+import pytest
+import wfcommons.utils
+
+from typing import Dict
+
+
+class TestUtils:
+
+    @pytest.mark.unit
+    def test_best_fit_distribution(self) -> None:
+        pass
+
+    @pytest.mark.parametrize(
+        "distribution,min_value,max_value,variable",
+        [
+            pytest.param(None, 10, 100, 10),
+            pytest.param({"name": "norm", "params": [0.08688656476267097, 0.2572832376513094]}, 10, 100, 10),
+        ],
+    ) 
+    def test_generate_rvs(self, distribution: Dict, min_value: float, max_value: float, variable: float) -> None:
+        assert(min_value <= wfcommons.utils.generate_rvs(distribution, min_value, max_value) <= max_value )
+
+    @pytest.mark.parametrize(
+        "n,r,combinations",
+        [
+            pytest.param(2, 2, 1),
+            pytest.param(10, 2, 45),
+            pytest.param(10, 3, 120),
+        ],
+    )   
+    def test_ncr(self, n: int, r: int, combinations: int) -> None:
+        assert(wfcommons.utils.ncr(n, r) == combinations)