Merge 9dc2229 into 6056085

src/cr/cube/crunch_cube.py

@@ -125,6 +125,10 @@ def as_array(
 
         return self._drop_mr_cat_dims(array)
 
+    @lazyproperty
+    def can_compare_pairwise(self):
+        return all(slice_.can_compare_pairwise for slice_ in self.slices)
+
     def count(self, weighted=True):
         """Return numberic count of rows considered for cube response."""
         return self._measures.weighted_n if weighted else self._measures.unweighted_n

tests/unit/test_crunch_cube.py

@@ -15,6 +15,7 @@
     _UnweightedCountMeasure,
     _WeightedCountMeasure,
 )
+from cr.cube.cube_slice import CubeSlice
 from cr.cube.dimension import AllDimensions, _ApparentDimensions, Dimension
 from cr.cube.enum import DIMENSION_TYPE as DT
 
@@ -30,6 +31,12 @@
 
 
 class DescribeCrunchCube(object):
+    def it_can_compare_pariwise(self, can_compare_pairwise_fixture, slices_prop_):
+        slices, can_compare_pairwise = can_compare_pairwise_fixture
+        slices_prop_.return_value = slices
+        cube = CrunchCube(None)
+        assert cube.can_compare_pairwise is can_compare_pairwise
+
     def it_provides_a_default_repr(self):
         cube = CrunchCube(None)
         repr_ = repr(cube)
@@ -232,6 +239,22 @@ def it_provides_access_to_its_Measures_object_to_help(
 
     # fixtures -------------------------------------------------------
 
+    @pytest.fixture(
+        params=[
+            ([True, True, True], True),
+            ([False, True, True], False),
+            ([True, True, False], False),
+            ([False, False, False], False),
+        ]
+    )
+    def can_compare_pairwise_fixture(self, request):
+        slices_can_compare_pairwise, cube_can_compare_pairwise = request.param
+        slices = [
+            instance_mock(request, CubeSlice, can_compare_pairwise=can_compare_pairwise)
+            for can_compare_pairwise in slices_can_compare_pairwise
+        ]
+        return slices, cube_can_compare_pairwise
+
     @pytest.fixture(
         params=[
             # ---0 - CAT x CAT---
@@ -448,6 +471,10 @@ def is_weighted_fixture(self, request):
     def AllDimensions_(self, request):
         return class_mock(request, "cr.cube.crunch_cube.AllDimensions")
 
+    @pytest.fixture
+    def slices_prop_(self, request):
+        return property_mock(request, CrunchCube, "slices")
+
     @pytest.fixture
     def all_dimensions_(self, request):
         return instance_mock(request, AllDimensions)