Reformulate Math Functions

tests/test_math_base.py

@@ -0,0 +1,41 @@
+#####################################################
+# Copyright (c) Xuanyi Dong [GitHub D-X-Y], 2021.03 #
+#####################################################
+# pytest tests/test_math_base.py -s                 #
+#####################################################
+import sys, random
+import unittest
+import pytest
+from pathlib import Path
+
+lib_dir = (Path(__file__).parent / ".." / "lib").resolve()
+print("library path: {:}".format(lib_dir))
+if str(lib_dir) not in sys.path:
+    sys.path.insert(0, str(lib_dir))
+
+from datasets import QuadraticFunc
+
+
+class TestQuadraticFunc(unittest.TestCase):
+    """Test the quadratic function."""
+
+    def test_simple(self):
+        function = QuadraticFunc([[0, 1], [0.5, 4], [1, 1]])
+        print(function)
+        for x in (0, 0.5, 1):
+            print("f({:})={:}".format(x, function(x)))
+        thresh = 0.2
+        self.assertTrue(abs(function(0) - 1) < thresh)
+        self.assertTrue(abs(function(0.5) - 4) < thresh)
+        self.assertTrue(abs(function(1) - 1) < thresh)
+
+    def test_none(self):
+        function = QuadraticFunc()
+        function.fit(
+            list_of_points=[[0, 1], [0.5, 4], [1, 1]], max_iter=3000, verbose=False
+        )
+        print(function)
+        thresh = 0.15
+        self.assertTrue(abs(function(0) - 1) < thresh)
+        self.assertTrue(abs(function(0.5) - 4) < thresh)
+        self.assertTrue(abs(function(1) - 1) < thresh)