Added a block of code in tests.test_reader.test_read_csv() for testin…

…g if read_csv() can read BytesIO. It currently raises AssertionError.

tests/test_reader.py

@@ -17,6 +17,7 @@
 from anesthetic.read.hdf import HDFStore, read_hdf
 from anesthetic.read.csv import read_csv
 from utils import pytables_mark_xfail, h5py_mark_xfail, getdist_mark_skip
+import io
 
 
 @pytest.fixture(autouse=True)
@@ -331,3 +332,10 @@ def test_read_csv(tmp_path, root):
     samples_ = read_chains(filename)
     samples_.root = samples.root
     assert_frame_equal(samples, samples_)
+
+    with open(filename, 'rb') as f:
+        csv_bytes = f.read()
+    bytesio_obj = io.BytesIO(csv_bytes)
+    samples_bytes = read_csv(bytesio_obj)
+    samples_bytes.root = samples.root
+    assert_frame_equal(samples, samples_bytes)