Fix the cache lookup in _info (#840)

Author: YeahItsMeAgain

s3fs/core.py

@@ -1293,7 +1293,7 @@ async def _info(self, path, bucket=None, key=None, refresh=False, version_id=Non
                     if out:
                         return out[0]
                 else:
-                    out = [o for o in out if o["name"] == path]
+                    out = [o for o in out if o["name"] == fullpath]
                     if out:
                         return out[0]
                     return {"name": path, "size": 0, "type": "directory"}

s3fs/tests/test_s3fs.py

@@ -271,6 +271,7 @@ def test_info(s3):
     s3.ls(parent)  # fill the cache with parent dir
     assert s3.info(a) == s3.dircache[parent][0]  # correct value
     assert id(s3.info(a)) == id(s3.dircache[parent][0])  # is object from cache
+    assert id(s3.info(f"/{a}")) == id(s3.dircache[parent][0])  # is object from cache
 
     new_parent = test_bucket_name + "/foo"
     s3.mkdir(new_parent)