use pytest.ini testpaths to order testing

tests/basic/test_io.py

@@ -0,0 +1,65 @@
+import os
+import unittest
+from pathlib import Path
+from unittest.mock import MagicMock, patch
+
+from aider.io import AutoCompleter, InputOutput
+from aider.utils import ChdirTemporaryDirectory
+
+
+class TestInputOutput(unittest.TestCase):
+    def test_no_color_environment_variable(self):
+        with patch.dict(os.environ, {"NO_COLOR": "1"}):
+            io = InputOutput()
+            self.assertFalse(io.pretty)
+
+    def test_autocompleter_with_non_existent_file(self):
+        root = ""
+        rel_fnames = ["non_existent_file.txt"]
+        addable_rel_fnames = []
+        commands = None
+        autocompleter = AutoCompleter(root, rel_fnames, addable_rel_fnames, commands, "utf-8")
+        self.assertEqual(autocompleter.words, set(rel_fnames))
+
+    def test_autocompleter_with_unicode_file(self):
+        with ChdirTemporaryDirectory():
+            root = ""
+            fname = "file.py"
+            rel_fnames = [fname]
+            addable_rel_fnames = []
+            commands = None
+            autocompleter = AutoCompleter(root, rel_fnames, addable_rel_fnames, commands, "utf-8")
+            self.assertEqual(autocompleter.words, set(rel_fnames))
+
+            Path(fname).write_text("def hello(): pass\n")
+            autocompleter = AutoCompleter(root, rel_fnames, addable_rel_fnames, commands, "utf-8")
+            self.assertEqual(autocompleter.words, set(rel_fnames + ["hello"]))
+
+            encoding = "utf-16"
+            some_content_which_will_error_if_read_with_encoding_utf8 = "ÅÍÎÏ".encode(encoding)
+            with open(fname, "wb") as f:
+                f.write(some_content_which_will_error_if_read_with_encoding_utf8)
+
+            autocompleter = AutoCompleter(root, rel_fnames, addable_rel_fnames, commands, "utf-8")
+            self.assertEqual(autocompleter.words, set(rel_fnames))
+
+    @patch("aider.io.PromptSession")
+    def test_get_input_is_a_directory_error(self, MockPromptSession):
+        # Mock the PromptSession to simulate user input
+        mock_session = MockPromptSession.return_value
+        mock_session.prompt.return_value = "test input"
+
+        io = InputOutput(pretty=False)  # Windows tests throw UnicodeDecodeError
+        root = "/"
+        rel_fnames = ["existing_file.txt"]
+        addable_rel_fnames = ["new_file.txt"]
+        commands = MagicMock()
+
+        # Simulate IsADirectoryError
+        with patch("aider.io.open", side_effect=IsADirectoryError):
+            result = io.get_input(root, rel_fnames, addable_rel_fnames, commands)
+            self.assertEqual(result, "test input")
+
+
+if __name__ == "__main__":
+    unittest.main()