feat(scan_file): Check file argument is a file object (#70)

tests/test_client.py

@@ -339,6 +339,13 @@ def test_scan_file(httpserver):
   assert analysis.type == 'analysis'
 
 
+def test_scan_file_valueerror(httpserver):
+  """Tests an exception is raised when calling scan_file using invalid args."""
+  with new_client(httpserver) as client:
+    with pytest.raises(TypeError):
+      client.scan_file('/Users/test/path/to/file.txt')
+
+
 def test_scan_url(httpserver):
 
   httpserver.expect_request(

vt/client.py

@@ -15,6 +15,7 @@
 import asyncio
 import base64
 import json
+import io
 
 from .error import APIError
 from .feed import Feed
@@ -584,6 +585,9 @@ def scan_file(self, file, wait_for_completion=False):
   async def scan_file_async(self, file, wait_for_completion=False):
     """Like :func:`scan_file` but returns a coroutine."""
 
+    if not isinstance(file, io.IOBase):
+      raise TypeError(f'Expected a file to be a file object, got {type(file)}')
+
     # The snippet below could be replaced with this simpler code:
     #
     # form_data = aiohttp.FormData()