chore: import upstream snapshot with attribution

tests/github/test_pr_size_label.py

@@ -0,0 +1,66 @@
+from __future__ import annotations
+
+import importlib.util
+import sys
+from pathlib import Path
+
+import pytest
+
+SCRIPT = (
+    Path(__file__).resolve().parents[2] / ".github" / "scripts" / "pr-size" / "compute_label.py"
+)
+spec = importlib.util.spec_from_file_location("compute_pr_size", SCRIPT)
+assert spec and spec.loader
+module = importlib.util.module_from_spec(spec)
+sys.modules[spec.name] = module
+spec.loader.exec_module(module)
+
+
+@pytest.mark.parametrize(
+    "total, expected",
+    [
+        (0, "size/XS"),
+        (9, "size/XS"),
+        (10, "size/S"),
+        (49, "size/S"),
+        (50, "size/M"),
+        (199, "size/M"),
+        (200, "size/L"),
+        (499, "size/L"),
+        (500, "size/XL"),
+        (10_000, "size/XL"),
+    ],
+)
+def test_size_label_boundaries(total: int, expected: str) -> None:
+    assert module.size_label(total) == expected
+
+
+@pytest.mark.parametrize(
+    "filename",
+    ["uv.lock", "package-lock.json", "web/package-lock.json", "web/electron/yarn.lock"],
+)
+def test_lock_files_are_generated(filename: str) -> None:
+    assert module.is_generated(filename)
+
+
+@pytest.mark.parametrize(
+    "filename",
+    ["omnigent/runtime/workflow.py", "docs/uv.lock.md", "src/package-lock.json.bak"],
+)
+def test_source_files_are_not_generated(filename: str) -> None:
+    assert not module.is_generated(filename)
+
+
+def test_total_changes_excludes_generated() -> None:
+    files = [
+        {"filename": "omnigent/a.py", "additions": 30, "deletions": 10},
+        {"filename": "uv.lock", "additions": 5000, "deletions": 4000},
+        {"filename": "web/package-lock.json", "additions": 800, "deletions": 0},
+    ]
+    # Only the source file counts: 30 + 10 = 40 -> size/S.
+    assert module.total_changes(files) == 40
+    assert module.size_label(module.total_changes(files)) == "size/S"
+
+
+def test_total_changes_missing_fields_default_to_zero() -> None:
+    assert module.total_changes([{"filename": "x.py"}]) == 0