MAESTRO: add engine TDD fixtures and tests

backend/tests/engine/test_analyzer.py

@@ -0,0 +1,46 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+from app.engine.analyzer import HeaderAnalyzer
+from app.engine.models import AnalysisRequest, AnalysisResult, TestResult
+
+
+FIXTURES_DIR = Path(__file__).resolve().parents[1] / "fixtures"
+
+
+def test_analyzer_runs_selected_tests_and_reports_progress() -> None:
+    raw_headers = (FIXTURES_DIR / "sample_headers.txt").read_text(encoding="utf-8")
+    request = AnalysisRequest(
+        headers=raw_headers,
+        config={
+            "test_ids": [12, 13],
+            "resolve": False,
+            "decode_all": False,
+        },
+    )
+
+    progress_events: list[tuple[int, int, str]] = []
+
+    def on_progress(current_index: int, total_tests: int, test_name: str) -> None:
+        progress_events.append((current_index, total_tests, test_name))
+
+    analyzer = HeaderAnalyzer()
+    result = analyzer.analyze(request, progress_callback=on_progress)
+
+    assert isinstance(result, AnalysisResult)
+    assert len(result.results) == 2
+    assert [item.test_id for item in result.results] == [12, 13]
+    assert all(isinstance(item, TestResult) for item in result.results)
+
+    assert result.metadata.total_tests == 2
+    assert (
+        result.metadata.passed_tests
+        + result.metadata.failed_tests
+        + result.metadata.skipped_tests
+    ) == result.metadata.total_tests
+
+    assert progress_events
+    assert all(total == 2 for _, total, _ in progress_events)
+    assert progress_events[0][0] == 0
+    assert progress_events[-1][0] == 1