Fix to container.upload()'s behavior

container.upload() previously only uploaded the contents of a specified directory path to the container.
It now uploads the file or directory pointed to by the specified path.
Example before: container.upload(test.png) would not upload the file as
it would need a directory path.
Example before: container.upload(test/) would upload the contents of
the test directory
Example after: container.upload(test.png) uploads the file test.png and
container.upload(test/) uploads the entire test directory

chi/container.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 import io
+import os
 import logging
 import tarfile
 import time
@@ -202,14 +203,17 @@ def execute(container_ref: "str", command: "str") -> "dict":
 def upload(container_ref: "str", source: "str", dest: "str") -> "dict":
     """Upload a file or directory to a running container.
 
+    This method requires your running container to include
+    the GNU tar utility.
+
     Args:
         container_ref (str): The name or ID of the container.
         source (str): The (local) path to the file or directory to upload.
         dest (str): The (container) path to upload the file or directory to.
     """
     fd = io.BytesIO()
     with tarfile.open(fileobj=fd, mode="w") as tar:
-        tar.add(source, arcname=".")
+        tar.add(source, arcname=os.path.basename(source))
     fd.seek(0)
     data = fd.read()
     fd.close()
@@ -219,6 +223,9 @@ def upload(container_ref: "str", source: "str", dest: "str") -> "dict":
 def download(container_ref: "str", source: "str", dest: "str"):
     """Download a file or directory from a running container.
 
+       This method requires your running container to include
+       both the POSIX sh and GNU tar utilities.
+
     Args:
         container_ref (str): The name or ID of the container.
         source (str): The (container) path of the file or directory.