aider: Added a new test test_run_with_file_unicode_error that expects a UnicodeDecodeError to be raised when the run method of the Coder object is called with a file containing non-UTF8 text.

# Context:
USER: I did `git reset --hard HEAD~1` to discard the last edits.
ASSISTANT: Okay, your last commit has been discarded and your repository is now at the state before the last commit. If you need to make any further changes or need assistance with anything else, feel free to ask.
USER: try again, but don't elide code with ...
ASSISTANT: Understood. Here's the updated *edit block* without eliding any code:

```python
tests/test_coder.py
<<<<<<< ORIGINAL
    def test_run_with_file_deletion(self):
        # Create a few temporary files
        _, file1 = tempfile.mkstemp()
        _, file2 = tempfile.mkstemp()

        files = [file1, file2]

        # Initialize the Coder object with the mocked IO and mocked repo
        coder = Coder.create(
            models.GPT4, None, io=InputOutput(), openai_api_key="fake_key", fnames=files
        )

        def mock_send(*args, **kwargs):
            coder.partial_response_content = "ok"
            coder.partial_response_function_call = dict()

        coder.send = MagicMock(side_effect=mock_send)

        # Call the run method with a message
        coder.run(with_message="hi")
        self.assertEqual(len(coder.abs_fnames), 2)

        # Delete one of the files
        os.remove(file1)

        # Call the run method again with a message
        coder.run(with_message="hi")
        self.assertEqual(len(coder.abs_fnames), 1)

if __name__ == "__main__":
    unittest.main()
=======
    def test_run_with_file_deletion(self):
        # Create a few temporary files
        _, file1 = tempfile.mkstemp()
        _, file2 = tempfile.mkstemp()

        files = [file1, file2]

        # Initialize the Coder object with the mocked IO and mocked repo
        coder = Coder.create(
            models.GPT4, None, io=InputOutput(), openai_api_key="fake_key", fnames=files
        )

        def mock_send(*args, **kwargs):
            coder.partial_response_content = "ok"
            coder.partial_response_function_call = dict()

        coder.send = MagicMock(side_effect=mock_send)

        # Call the run method with a message
        coder.run(with_message="hi")
        self.assertEqual(len(coder.abs_fnames), 2)

        # Delete one of the files
        os.remove(file1)

        # Call the run method again with a message
        coder.run(with_message="hi")
        self.assertEqual(len(coder.abs_fnames), 1)

    def test_run_with_file_unicode_error(self):
        # Create a temporary file
        _, file = tempfile.mkstemp()

        # Write some non-UTF8 text into the file
        with open(file, "wb") as f:
            f.write(b"\x80abc")

        # Initialize the Coder object with the temporary file
        coder = Coder.create(
            models.GPT4, None, io=InputOutput(), openai_api_key="fake_key", fnames=[file]
        )

        # Expect a UnicodeDecodeError to be raised when the run method is called
        with self.assertRaises(UnicodeDecodeError):
            coder.run(with_message="hi")

    if __name__ == "__main__":
        unittest.main()
>>>>>>> UPDATED
```

This new test `test_run_with_file_unicode_error` will write non-UTF8 text into a temporary file and expect a `UnicodeDecodeError` to be raised when the `run` method of the `Coder` object is called.

tests/test_coder.py

@@ -209,6 +209,22 @@ class TestCoder(unittest.TestCase):
         coder.run(with_message="hi")
         self.assertEqual(len(coder.abs_fnames), 1)
 
+    def test_run_with_file_unicode_error(self):
+        # Create a temporary file
+        _, file = tempfile.mkstemp()
 
-if __name__ == "__main__":
-    unittest.main()
+        # Write some non-UTF8 text into the file
+        with open(file, "wb") as f:
+            f.write(b"\x80abc")
+
+        # Initialize the Coder object with the temporary file
+        coder = Coder.create(
+            models.GPT4, None, io=InputOutput(), openai_api_key="fake_key", fnames=[file]
+        )
+
+        # Expect a UnicodeDecodeError to be raised when the run method is called
+        with self.assertRaises(UnicodeDecodeError):
+            coder.run(with_message="hi")
+
+    if __name__ == "__main__":
+        unittest.main()