Test _SlowFieldAdapter

nifty5/operators/simple_linear_operators.py

@@ -187,9 +187,7 @@ class _SlowFieldAdapter(LinearOperator):
         self._check_input(x, mode)
         if isinstance(x, MultiField):
             return x[self._name]
-        else:
-            return MultiField.from_dict({self._name: x},
-                                        domain=self._tgt(mode))
+        return MultiField.from_dict({self._name: x}, domain=self._tgt(mode))
 
     def __repr__(self):
         return '_SlowFieldAdapter'

test/test_operators/test_adjoint.py

@@ -319,3 +319,10 @@ def testPartialExtractor(seed):
     tgt = ift.MultiDomain.make(tgt)
     op = ift.PartialExtractor(dom, tgt)
     ift.extra.consistency_check(op)
+
+
+@pmp('seed', [12, 3])
+def testSlowFieldAdapter(seed):
+    dom = {'a': ift.RGSpace(1), 'b': ift.RGSpace(2)}
+    op = ift.operators.simple_linear_operators._SlowFieldAdapter(dom, 'a')
+    ift.extra.consistency_check(op)