Add decoding test

Author: dcherian

xarray/coding/common.py

@@ -75,6 +75,9 @@ def __getitem__(self, key):
     def get_duck_array(self):
         return self.func(self.array.get_duck_array())
 
+    async def async_get_duck_array(self):
+        return self.func(await self.array.async_get_duck_array())
+
     def __repr__(self) -> str:
         return f"{type(self).__name__}({self.array!r}, func={self.func!r}, dtype={self.dtype!r})"
 

xarray/tests/test_async.py

@@ -86,6 +86,7 @@ def memorystore() -> "MemoryStore":
         chunks=(5, 5),
         dtype="f4",
         dimension_names=["x", "y"],
+        attributes={"add_offset": 1, "scale_factor": 2},
     )
     z1[:, :] = np.random.random((10, 10))