feat(report): implement write_failure_report + 8 tests, 100% coverage

tests/test_tier2_report_writer.py

@@ -85,3 +85,36 @@ def test_stopped_flag_created(monkeypatch, tmp_path) -> None:
  )
  flag = compute_stopped_flag_path("my_track")
  assert flag.exists()
+
+
+def test_recommend_green_phase_stuck() -> None:
+ from scripts.tier2.write_report import _recommend
+ state = FailcountState(red_phase_failures=0, green_phase_failures=3)
+ rec = _recommend(state, None)
+ assert "green-phase" in rec.lower()
+
+
+def test_truncate_long_text() -> None:
+ from scripts.tier2.write_report import _truncate
+ long_text = "\n".join(f"line {i}" for i in range(100))
+ truncated = _truncate(long_text, max_lines=10)
+ assert "line 0" in truncated
+ assert "line 9" in truncated
+ assert "truncated" in truncated
+ assert "90 more lines" in truncated
+
+
+def test_truncate_short_text_unchanged() -> None:
+ from scripts.tier2.write_report import _truncate
+ text = "short\ntext"
+ assert _truncate(text) == text
+
+
+def test_git_log_fallback_on_subprocess_error(monkeypatch, tmp_path) -> None:
+ from scripts.tier2.write_report import _git_log_for_branch
+ import scripts.tier2.write_report as wr
+ def fake_run(*args, **kwargs):
+  raise FileNotFoundError("no git")
+ monkeypatch.setattr(wr.subprocess, "run", fake_run)
+ result = _git_log_for_branch("any", tmp_path)
+ assert "not available" in result.lower()