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.venv/Lib/site-packages/IPython/utils/tests/test_openpy.py

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+import io
+import os.path
+
+from IPython.utils import openpy
+
+mydir = os.path.dirname(__file__)
+nonascii_path = os.path.join(mydir, "../../core/tests/nonascii.py")
+
+
+def test_detect_encoding():
+    with open(nonascii_path, "rb") as f:
+        enc, lines = openpy.detect_encoding(f.readline)
+    assert enc == "iso-8859-5"
+
+
+def test_read_file():
+    with io.open(nonascii_path, encoding="iso-8859-5") as f:
+        read_specified_enc = f.read()
+    read_detected_enc = openpy.read_py_file(nonascii_path, skip_encoding_cookie=False)
+    assert read_detected_enc == read_specified_enc
+    assert "coding: iso-8859-5" in read_detected_enc
+
+    read_strip_enc_cookie = openpy.read_py_file(
+        nonascii_path, skip_encoding_cookie=True
+    )
+    assert "coding: iso-8859-5" not in read_strip_enc_cookie
+
+
+def test_source_to_unicode():
+    with io.open(nonascii_path, "rb") as f:
+        source_bytes = f.read()
+    assert (
+        openpy.source_to_unicode(source_bytes, skip_encoding_cookie=False).splitlines()
+        == source_bytes.decode("iso-8859-5").splitlines()
+    )
+
+    source_no_cookie = openpy.source_to_unicode(source_bytes, skip_encoding_cookie=True)
+    assert "coding: iso-8859-5" not in source_no_cookie