Uploaded Test files

venv/Lib/site-packages/nbformat/tests/test_nbformat.py

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+import pytest
+
+from nbformat import read
+
+
+def test_read_invalid_iowrapper(tmpdir):
+    ipynb_filepath = tmpdir.join("empty.ipynb")
+    ipynb_filepath.write("{}")
+
+    with pytest.raises(AttributeError) as excinfo:
+        with ipynb_filepath.open() as fp:
+            read(fp, as_version=4)
+    assert "cells" in str(excinfo.value)
+
+
+def test_read_invalid_filepath(tmpdir):
+    ipynb_filepath = tmpdir.join("empty.ipynb")
+    ipynb_filepath.write("{}")
+
+    with pytest.raises(AttributeError) as excinfo:
+        read(str(ipynb_filepath), as_version=4)
+    assert "cells" in str(excinfo.value)
+
+
+def test_read_invalid_pathlikeobj(tmpdir):
+    ipynb_filepath = tmpdir.join("empty.ipynb")
+    ipynb_filepath.write("{}")
+
+    with pytest.raises(AttributeError) as excinfo:
+        read(ipynb_filepath, as_version=4)
+    assert "cells" in str(excinfo.value)
+
+
+def test_read_invalid_str(tmpdir):
+    with pytest.raises(OSError) as excinfo:
+        read("not_exist_path", as_version=4)
+    assert "No such file or directory" in str(excinfo.value)
+
+
+def test_read_invalid_type(tmpdir):
+    with pytest.raises(OSError) as excinfo:
+        read(123, as_version=4)