Update evaluator

tests/test_evaluator.py

@@ -0,0 +1,23 @@
+import numpy as np
+import pytest
+
+from scgenerator.evaluator import Evaluator, Rule
+
+
+@pytest.fixture
+def disk_rules() -> list[Rule]:
+    return [
+        Rule("radius", lambda diameter: diameter / 2),
+        Rule("diameter", lambda radius: radius * 2),
+        Rule("diameter", lambda perimeter: perimeter / np.pi),
+        Rule("perimeter", lambda diameter: diameter * np.pi),
+        Rule("area", lambda radius: np.pi * radius**2),
+        Rule("radius", lambda area: np.sqrt(area / np.pi)),
+    ]
+
+
+def test_simple(disk_rules: list[Rule]):
+    evaluator = Evaluator(*disk_rules, Rule("radius", lambda lol: lol * 3))
+    evaluator.set()
+
+    assert evaluator.compute("area") == pytest.approx(78.53981633974483)