Renamed directory and created aPID test file.

NP_Implementation/test/test_aPID_np.py

@@ -0,0 +1,19 @@
+import unittest
+import numpy as np
+
+from aPID_numpy import AdaptivePIDNP
+from RBF_numpy import RBFNetwork
+
+class TestAdaptivePIDNP(unittest.TestCase):
+    def setUp(self):
+        """Set up an AdaptivePIDNP instance for testing."""
+        Kp = 4.0
+        Ki = 0.1
+        Kd = 0.01
+        self.input_dim = 3 
+        self.n_centers = 5
+        self.rbf = RBFNetwork(self.input_dim, self.n_centers)
+        self.apid = AdaptivePIDNP(Kp, Ki, Kd, self.rbf)
+
+if __name__ == '__main__':
+    unittest.main()