Optimize G-code processing time by using M73OffsetTemplate for plate number offsets

tests/test_m73_offset_template.py

@@ -0,0 +1,42 @@
+from __future__ import annotations
+
+import unittest
+
+from a1_swap_mod_packer.gcode import M73_RE, apply_plate_number_offset, prepare_m73_offset_template
+
+
+class M73OffsetTemplateTest(unittest.TestCase):
+    def test_template_matches_previous_regex_replacement_semantics(self) -> None:
+        gcode = (
+            "M73 P0 R10\n"
+            "; M73 P0 R20\n"
+            " M73 P0 R30\n"
+            "M73 P50 R5999 ; comment\n"
+            "G1 X1\n"
+            "M73 P100 R0\n"
+        )
+
+        def previous_apply(text: str, plate_number: int) -> str:
+            minute_offset = plate_number * 100 * 60
+
+            def replace(match) -> str:
+                prefix = match.group(1)
+                remaining_minutes = int(match.group(2)) + minute_offset
+                suffix = match.group(3)
+                return f"{prefix}{remaining_minutes}{suffix}"
+
+            return M73_RE.sub(replace, text)
+
+        template = prepare_m73_offset_template(gcode)
+        for plate_number in (1, 2, 10):
+            self.assertEqual(template.apply(plate_number), previous_apply(gcode, plate_number))
+            self.assertEqual(apply_plate_number_offset(gcode, plate_number), previous_apply(gcode, plate_number))
+
+    def test_template_without_m73_matches_returns_original_text(self) -> None:
+        gcode = "G1 X1\n; M73 P0 R10\n"
+        template = prepare_m73_offset_template(gcode)
+        self.assertEqual(template.apply(3), gcode)
+
+
+if __name__ == "__main__":
+    unittest.main()