From 99c77b82d9362eb5760a38c3f0220f42a0c05116 Mon Sep 17 00:00:00 2001
From: Mika <kontakt@donau2space.de>
Date: Wed, 25 Mar 2026 11:11:50 +0000
Subject: [PATCH] Add queue_separation/tests/test_main.py

---
 queue_separation/tests/test_main.py | 69 +++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 queue_separation/tests/test_main.py

diff --git a/queue_separation/tests/test_main.py b/queue_separation/tests/test_main.py
new file mode 100644
index 0000000..abc9e71
--- /dev/null
+++ b/queue_separation/tests/test_main.py
@@ -0,0 +1,69 @@
+import pytest
+import statistics
+from queue_separation import main
+
+@pytest.fixture
+def sample_jobs():
+    # Mix aus regulären und Hotspot-Jobs
+    jobs = [
+        {"id": i, "runtime": 1.0 + i * 0.1, "queue": "main" if i % 3 else "hotspot"}
+        for i in range(1, 31)
+    ]
+    return jobs
+
+
+def test_simulate_queue_separation_structure(sample_jobs):
+    main_queue = [j for j in sample_jobs if j["queue"] == "main"]
+    hotspot_queue = [j for j in sample_jobs if j["queue"] == "hotspot"]
+
+    result = main.simulate_queue_separation(
+        jobs=sample_jobs, hotspot_queue=hotspot_queue, main_queue=main_queue
+    )
+
+    # Strukturvalidierung
+    assert isinstance(result, dict), "Simulationsergebnis muss ein Dict sein"
+    for field in ("retry_tail_p99", "bandwidth", "hotspot_percentage"):
+        assert field in result, f"Fehlendes Feld {field} in PerformanceMetrics"
+        assert isinstance(result[field], (float, int)), f"{field} muss numerisch sein"
+
+
+def test_simulation_value_ranges(sample_jobs):
+    main_queue = [j for j in sample_jobs if j["queue"] == "main"]
+    hotspot_queue = [j for j in sample_jobs if j["queue"] == "hotspot"]
+
+    result = main.simulate_queue_separation(
+        jobs=sample_jobs, hotspot_queue=hotspot_queue, main_queue=main_queue
+    )
+
+    # Werte sollen in plausiblen Bereichen liegen
+    assert 0.0 <= result["retry_tail_p99"] <= 100.0, "retry_tail_p99 außerhalb des Bereichs"
+    assert result["bandwidth"] > 0, "Bandbreite sollte positiv sein"
+    assert 0.0 <= result["hotspot_percentage"] <= 1.0, "Hotspot-Prozentsatz außerhalb des Bereichs"
+
+
+def test_tail_latency_increases_with_hotspots(sample_jobs):
+    # Weniger Hotspots -> bessere Performance erwartet
+    main_queue = [j for j in sample_jobs if j["queue"] == "main"]
+    hotspot_queue = [j for j in sample_jobs if j["queue"] == "hotspot"]
+
+    results_low_hotspot = main.simulate_queue_separation(
+        jobs=sample_jobs[:10], hotspot_queue=hotspot_queue[:1], main_queue=main_queue[:9]
+    )
+
+    results_high_hotspot = main.simulate_queue_separation(
+        jobs=sample_jobs, hotspot_queue=hotspot_queue + main_queue[:5], main_queue=main_queue[5:]
+    )
+
+    assert (
+        results_high_hotspot["retry_tail_p99"] >= results_low_hotspot["retry_tail_p99"]
+    ), "Mehr Hotspots sollten höhere Tail-Latenz erzeugen"
+    assert results_high_hotspot["bandwidth"] >= 0 and results_low_hotspot["bandwidth"] >= 0
+
+
+def test_invalid_input_handling():
+    # Ungültiger Input sollte Exception oder Validation Error werfen
+    invalid_jobs = [{"runtime": "fast", "queue": 123}]  # Typfehler
+    with pytest.raises((AssertionError, TypeError, ValueError)):
+        main.simulate_queue_separation(
+            jobs=invalid_jobs, hotspot_queue=[], main_queue=[]
+        )
\ No newline at end of file