add start of inference test

Author: Onno Kampman

tests/fcest/helpers/test_inference.py

@@ -0,0 +1,42 @@
+import unittest
+
+import numpy as np
+
+from fcest.helpers.inference import run_adam
+
+
+class TestInference(unittest.TestCase):
+    """
+    Test functions in inference.py.
+    """
+
+    def test_run_adam(self):
+        """
+        Test that the function returns a list.
+        """
+        # logf = run_adam(
+        #     "VWP",
+        #     m,
+        #     iterations=100,
+        # )
+        logf = []
+        self.assertEqual(type(logf), list)
+
+    @staticmethod
+    def _simulate_d2_time_series() -> np.array:
+        """
+        Get dummy time series.
+
+        :return:
+            Array of shape (N, D)
+        """
+        N = 200
+        D = 2
+        x = np.linspace(0, 1, N).reshape(-1, 1)
+        y = np.random.random(size=(N, D))
+
+        return x, y
+
+
+if __name__ == '__main__':
+    unittest.main()