def test_head_tail():
fs = MemoryFileSystem()
with fs.open("/myfile", "wb") as f:
f.write(b"I had a nice big cabbage")
assert fs.head("/myfile", 5) == b"I had"
assert fs.tail("/myfile", 7) == b"cabbage"
def test_head_tail():
fs = MemoryFileSystem()
with fs.open('/myfile', 'wb') as f:
f.write(b'I had a nice big cabbage')
assert fs.head('/myfile', 5) == b'I had'
assert fs.tail('/myfile', 7) == b'cabbage'
