Add test and renaming

nifty5/__init__.py

@@ -85,6 +85,7 @@ from .library.wiener_filter_curvature import WienerFilterCurvature
 from .library.correlated_fields import CorrelatedField, MfCorrelatedField
 from .library.adjust_variances import (make_adjust_variances_hamiltonian,
                                        do_adjust_variances)
+from .library.nfft import NFFT
 
 from . import extra
 

nifty5/library/nfft.py

@@ -20,7 +20,7 @@ import numpy as np
 import nifty5 as ift
 
 
-class NFFTOperator(ift.LinearOperator):
+class NFFT(ift.LinearOperator):
     """Performs a non-equidistant Fourier transform, i.e. a Fourier transform
     followed by a degridding operation.
 

test/test_operators/test_adjoint.py

@@ -279,3 +279,10 @@ def testValueInserter(sp, seed):
             ind.append(np.random.randint(0, ss-1))
     op = ift.ValueInserter(sp, ind)
     ift.extra.consistency_check(op)
+
+
+def testNFFT():
+    dom = ift.RGSpace(2*(16,))
+    uv = np.array([[.2, .4], [-.22, .452]])
+    op = ift.NFFT(dom, uv)
+    ift.extra.consistency_check(op)