fix interruption handling by breaking the diff loop.

test/test_resume.py

@@ -191,22 +191,22 @@ def test_resume_with_partition_namespaces():
 
 
 def test_resume_file_not_found():
-    """Test that --resume exits with error when output file doesn't exist."""
+    """Test that --resume starts fresh when output file doesn't exist."""
     tester = WikiqTester(SAILORMOON, "resume_not_found", in_compression="7z", out_format="parquet")
 
     expected_output = os.path.join(tester.output, f"{SAILORMOON}.parquet")
     if os.path.exists(expected_output):
         os.remove(expected_output)
 
-    try:
-        tester.call_wikiq("--resume")
-        pytest.fail("Expected error when --resume is used but output file doesn't exist")
-    except subprocess.CalledProcessError as exc:
-        stderr = exc.stderr.decode("utf8")
-        assert "Error: --resume specified but output file not found" in stderr, \
-            f"Expected error message about missing output file, got: {stderr}"
+    # Should succeed by starting fresh
+    tester.call_wikiq("--resume")
 
-    print("Resume file not found test passed!")
+    # Verify output was created
+    assert os.path.exists(expected_output), "Output file should be created when starting fresh"
+    table = pq.read_table(expected_output)
+    assert table.num_rows > 0, "Output should have data"
+
+    print("Resume file not found test passed - started fresh!")
 
 
 def test_resume_simple():