diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..1be6a53
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,7 @@
+{
+  "python.testing.pytestArgs": [
+    "tests"
+  ],
+  "python.testing.unittestEnabled": false,
+  "python.testing.pytestEnabled": true
+}
\ No newline at end of file
diff --git a/tests/allFileMetadata_compare_and_replace.py b/tests/allFileMetadata_compare_and_replace.py
new file mode 100644
index 0000000..dcba128
--- /dev/null
+++ b/tests/allFileMetadata_compare_and_replace.py
@@ -0,0 +1,80 @@
+import os
+import pytest
+import tempfile
+import time
+from twinTrim.dataStructures.allFileMetadata import AllFileMetadata
+from unittest.mock import patch
+
+@pytest.fixture
+def setup_files():
+    # Create two temporary files for testing
+    temp_file1 = tempfile.NamedTemporaryFile(delete=False)
+    temp_file2 = tempfile.NamedTemporaryFile(delete=False)
+
+    # Write some initial content to the files
+    temp_file1.write(b'Initial content for file 1.')
+    temp_file1.close()
+
+    temp_file2.write(b'Initial content for file 2.')
+    temp_file2.close()
+
+    # Return the paths of the temporary files
+    yield temp_file1.name, temp_file2.name
+
+    # Cleanup
+    os.remove(temp_file1.name)
+    os.remove(temp_file2.name)
+
+def test_compare_and_replace_removes_correct_file(setup_files):
+    file1, file2 = setup_files
+
+    # Modify the modification time of the second file to be newer
+    time.sleep(1)  # Ensure file2 is modified after file1
+    os.utime(file2, None)
+
+    metadata1 = AllFileMetadata(file1)
+    metadata2 = AllFileMetadata(file2)
+
+    with patch('twinTrim.dataStructures.allFileMetadata.handle_and_remove') as mock_remove:
+        metadata1.compare_and_replace(metadata2)
+
+        # Check that file1 is removed
+        mock_remove.assert_called_once_with(file1)
+
+def test_compare_and_replace_no_file_removed_when_file_missing(setup_files):
+    file1, file2 = setup_files
+
+    # Create a metadata object for file1
+    metadata1 = AllFileMetadata(file1)
+
+    # Create a metadata object for a non-existing file
+    nonexistent_file = 'nonexistent_file.txt'
+    metadata2 = AllFileMetadata(nonexistent_file)
+
+    with patch('twinTrim.dataStructures.allFileMetadata.handle_and_remove') as mock_remove:
+        metadata1.compare_and_replace(metadata2)
+
+        # Check that no file is removed
+        mock_remove.assert_not_called()
+
+def test_compare_and_replace_no_file_removed_when_both_files_missing(setup_files):
+    file1, _ = setup_files
+
+    # Create a metadata object for file1
+    metadata1 = AllFileMetadata(file1)
+
+    # Create a metadata object for two non-existing files
+    nonexistent_file1 = 'nonexistent_file1.txt'
+    nonexistent_file2 = 'nonexistent_file2.txt'
+    metadata2 = AllFileMetadata(nonexistent_file1)
+    metadata3 = AllFileMetadata(nonexistent_file2)
+
+    with patch('twinTrim.dataStructures.allFileMetadata.handle_and_remove') as mock_remove:
+        metadata1.compare_and_replace(metadata2)
+        # No file should be removed since the second file doesn't exist
+        mock_remove.assert_not_called()
+
+    with patch('twinTrim.dataStructures.allFileMetadata.handle_and_remove') as mock_remove:
+        metadata1.compare_and_replace(metadata3)
+        # No file should be removed since the second file doesn't exist
+        mock_remove.assert_not_called()
\ No newline at end of file