add a delete test

Author: slowjazz

tests/test_store/test_object.py

@@ -90,6 +90,17 @@ async def test_store_getsize_prefix(self, store: ObjectStore) -> None:
         total_size = await store.getsize_prefix("c")
         assert total_size == len(buf) * 2
 
+    async def test_store_delete(self, store: ObjectStore) -> None:
+        assert store.supports_deletes
+        buf = cpu.Buffer.from_bytes(b"\x01\x02\x03\x04")
+        await store.set("foo/1", buf)
+        await store.set("foo/2", buf)
+        await store.delete("foo/1")
+        assert not await store.exists("foo/1")
+        assert await store.exists("foo/2")
+        await store.delete_dir("foo")  # FileNotFoundErrors are suppressed
+        assert not await store.exists("foo/2")
+
 
 @pytest.mark.slow_hypothesis
 def test_zarr_hierarchy():