somethings wrong with distances?

test/test_operators/test_integration.py

@@ -17,11 +17,32 @@
 
 import numpy as np
 import pytest
-
+from numpy.testing import assert_allclose
 import nifty6 as ift
 
 from ..common import setup_function, teardown_function
 
 
 def test_integration_operator():
-    raise NotImplementedError
+    x1 = ift.RGSpace((9,), distances= 2.)
+    #x2 = ift.RGSpace((2, 12), distances=(0.3,))
+    dom1 = ift.makeDomain(x1)
+    #dom2 = ift.makeDomain((x1, x2))
+    f1 = ift.from_random('normal', dom1)
+    #f2 = ift.from_random('normal', dom2)
+    op1 = ift.ScalingOperator(dom1, 1)
+    #op2 = ift.ScalingOperator(dom2, 1)
+    res1 = f1.integrate()
+    res2 = op1.integrate()(f1)
+    assert_allclose(res1.val, res2.val)
+    # res3 = f2.integrate()
+    # res4 = op2.integrate()(f2)
+    # assert_allclose(res3.val, res4.val)
+    # res5 = f2.integrate(spaces=1)
+    # res6 = op2.integrate(spaces=1)(f)
+    # assert_allclose(res5.val, res6.val)
+    # for op in [op1, op2]:
+    #     ift.extra.consistency_check(op, domain_dtype=np.float64,
+    #                                 target_dtype=np.float64)
+    #     ift.extra.consistency_check(op, domain_dtype=np.complex128,
+    #                                 target_dtype=np.compley128)