added test

Author: TimOliverMaier

pymc/model.py

@@ -1229,7 +1229,8 @@ def set_data(
                         actual=len(new_coords),
                         expected=new_length,
                     )
-                self._coords[dname] = new_coords
+                # store it as tuple for immutability as in add_coord
+                self._coords[dname] = tuple(new_coords)
 
         shared_object.set_value(values)
 

pymc/tests/test_data_container.py

@@ -316,7 +316,10 @@ def test_explicit_coords(self):
         # pass coordinates explicitly, use numpy array in Data container
         with pm.Model(coords=coords) as pmodel:
             pm.MutableData("observations", data, dims=("rows", "columns"))
-
+            # new data with same shape
+            pm.set_data({"observations":data+1})
+            # new data with same shape and coords
+            pm.set_data({"observations":data},coords=coords)
         assert "rows" in pmodel.coords
         assert pmodel.coords["rows"] == ("R1", "R2", "R3", "R4", "R5")
         assert "rows" in pmodel.dim_lengths