Added test for new energy class wrapper

Author: davidcortesortuno

fidimag/common/c_clib.pyx

@@ -272,6 +272,9 @@ cdef extern from "c_energy.h":
 
         double *A
 
+# cdef extern from "c_energy.cpp":
+#     pass
+
 # -----------------------------------------------------------------------------
 # Python definitions
 
@@ -283,17 +286,18 @@ cdef extern from "c_energy.h":
 # once upon creation and deletion of the Python instance.
 
 cdef class PyExchangeEnergy:
-    cdef ExchangeEnergy thisptr
+    cdef ExchangeEnergy *thisptr
     # Try cinit:
-    def __init__(self, double [:] A):
+    def __cinit__(self, double [:] A):
+        # self.thisptr = new ExchangeEnergy()
         self.thisptr.init(&A[0])
-    # cdef ExchangeEnergy *thisptr
+
     # We could use another constructor if we use this method:
     # def __cinit__(self):
-    #     if type(self) is PyEnergy:
-    #         self.thisptr = new Energy()
+    #     if type(self) is PyExchangeEnergy:
+    #         self.thisptr = new ExchangeEnergy()
     # def __dealloc__(self):
-    #     if type(self) is PyEnergy:
+    #     if type(self) is PyExchangeEnergy:
     #         del self.thisptr
     # Necessary?
     def compute_field(self, t):

native/include/c_energy.h

@@ -1,4 +1,5 @@
 #include<cmath>
+#include<iostream>
 
 class Energy {
 public:
@@ -23,8 +24,9 @@ class ExchangeEnergy : public Energy {
 public:
     ExchangeEnergy() {};
     void init(double *A) {
-        set_up = false;
-        this->A = A;
+        std::cout << "Here A[0] = " << A[0] << "\n";
+        this->set_up = false;
+        // this->A = A;
     }
     double *A;
     void compute_field(double t);

tests/test_C_classes.py

@@ -0,0 +1,6 @@
+from fidimag.extensions.c_clib import PyExchangeEnergy
+import numpy as np
+
+A = np.ones(9, dtype=np.double)
+print(A)
+Exch = PyExchangeEnergy(A)