Reformulate Math Functions

tests/test_math_adv.py

@@ -0,0 +1,52 @@
+#####################################################
+# Copyright (c) Xuanyi Dong [GitHub D-X-Y], 2021.03 #
+#####################################################
+# pytest tests/test_math_adv.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
+from datasets import ConstantFunc
+from datasets import DynamicQuadraticFunc
+from datasets import ComposedSinFunc
+
+
+class TestConstantFunc(unittest.TestCase):
+    """Test the constant function."""
+
+    def test_simple(self):
+        function = ConstantFunc(0.1)
+        for i in range(100):
+            assert function(i) == 0.1
+
+
+class TestDynamicFunc(unittest.TestCase):
+    """Test DynamicQuadraticFunc."""
+
+    def test_simple(self):
+        timestamps = 30
+        function = DynamicQuadraticFunc()
+        function_param = dict()
+        function_param[0] = ComposedSinFunc(
+            num=timestamps, num_sin_phase=4, phase_shift=1.0, max_amplitude=1.0
+        )
+        function_param[1] = ConstantFunc(constant=0.9)
+        function_param[2] = ComposedSinFunc(
+            num=timestamps, num_sin_phase=5, phase_shift=0.4, max_amplitude=0.9
+        )
+        function.set(function_param)
+        print(function)
+
+        with self.assertRaises(TypeError) as context:
+            function(0)
+
+        function.set_timestamp(1)
+        print(function(2))