Test Snippets for buffered_read, open builtin

Author: rmliddle

tests/snippets/buffered_reader.py

@@ -1,10 +1,10 @@
 from io import BufferedReader, FileIO
 
-fi = FileIO('Cargo.toml')
+fi = FileIO('README.md')
 bb = BufferedReader(fi)
 
 result = bb.read()
 
 assert len(result) <= 8*1024
 assert len(result) >= 0
-
+assert isinstance(result, bytes)

tests/snippets/builtin_open.py

@@ -0,0 +1,9 @@
+c1 = open('README.md').read()
+
+assert isinstance(c1, str)
+assert 0 < len(c1)
+
+c2 = open('README.md', 'rb').read()
+
+assert isinstance(c2, bytes)
+assert 0 < len(c2)