Fix the issue that raises a bunch of OSError exceptions in the test s…

…cript (magmax#93)

tests/windows/conftest.py

@@ -3,8 +3,8 @@
 import pytest
 
 
-if sys.platform in ("win32", "cygwin"):
-    import msvcrt
+# if sys.platform in ("win32", "cygwin"):
+#     import msvcrt
 
 
 # ignore all tests in this folder if not on windows
@@ -14,10 +14,16 @@ def pytest_ignore_collect(path, config):
 
 
 @pytest.fixture
-def patched_stdin():
+def patched_stdin(monkeypatch):
     class mocked_stdin:
         def push(self, string):
-            for c in string:
-                msvcrt.ungetch(ord(c).to_bytes(1, "big"))
+            # Create an iterator from the string
+            characters = iter(string)
+
+            # Patch msvcrt.getwch to return the next character from the iterator.
+            # Don't use next(iter(string)) as it creates a new iterator each time.
+            # For example,
+            # if you use a new iterator, cursor_up (\x00\x48) will be read as \x00\x00.
+            monkeypatch.setattr("msvcrt.getwch", lambda: next(characters))
 
     return mocked_stdin()