Lab067: localize remaining PHY header failures

tests/test_lab067_header_failure_analysis.py

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+"""Проверки диагностических вычислений Lab067 без raw IQ и оборудования."""
+
+from __future__ import annotations
+
+import numpy as np
+
+from experiments import lab067_header_failure_analysis as lab067
+
+
+def test_header_diagnostics_repeats_strict_soft_combining() -> None:
+    expected = lab067.lab066.plans()[0].plan.phy_header_bits.astype(np.uint8)
+    soft = 2.0 * expected.astype(float) - 1.0
+    # Две копии одного бита имеют неверный знак, но малы по модулю. Третья
+    # правильная копия сильнее, поэтому штатная мягкая сумма сохраняет бит.
+    soft[:2] *= -0.1
+    result = lab067.header_diagnostics(soft, expected)
+    assert result["raw_header_errors"] == 2
+    assert result["voted_header_errors"] == 0
+    assert result["accepted"] is True
+
+
+def test_header_diagnostics_reports_field_and_copy_errors() -> None:
+    expected = lab067.lab066.plans()[0].plan.phy_header_bits.astype(np.uint8)
+    received = expected.copy()
+    received[24:26] ^= 1
+    result = lab067.header_diagnostics(
+        2.0 * received.astype(float) - 1.0,
+        expected,
+    )
+    assert result["raw_header_errors"] == 2
+    assert result["copy_errors"] == [1, 1, 0]
+    assert result["voted_header_errors"] == 1
+    assert result["magic_errors"] == 1
+    assert result["accepted"] is False
+
+
+def test_strict_candidate_selection_uses_nearest_expected_position() -> None:
+    rows = [
+        {"absolute_refined": 980, "packet_output": False, "crc": False, "fec": False, "header": False},
+        {"absolute_refined": 1003, "packet_output": False, "crc": False, "fec": False, "header": True},
+    ]
+    selected = lab067.strict_candidate_for_packet(rows, 1000)
+    assert selected is rows[1]
+
+
+def test_strict_candidate_selection_never_prefers_farther_success() -> None:
+    exact_failure = {
+        "absolute_refined": 1000, "packet_output": False,
+        "crc": False, "fec": False, "header": False,
+    }
+    farther_success = {
+        "absolute_refined": 1064, "packet_output": True,
+        "crc": True, "fec": True, "header": True,
+    }
+    selected = lab067.strict_candidate_for_packet(
+        [farther_success, exact_failure], 1000
+    )
+    assert selected is exact_failure
+
+
+def test_strict_candidate_tie_break_does_not_use_verdict() -> None:
+    lower_failure = {
+        "absolute_refined": 999, "packet_output": False,
+        "crc": False, "fec": False, "header": False,
+    }
+    upper_success = {
+        "absolute_refined": 1001, "packet_output": True,
+        "crc": True, "fec": True, "header": True,
+    }
+    selected = lab067.strict_candidate_for_packet(
+        [upper_success, lower_failure], 1000
+    )
+    assert selected is lower_failure
+
+
+def test_lab067_has_no_rf_entry_point() -> None:
+    assert not hasattr(lab067, "capture_once")
+    assert lab067.RX_PATH.name == "rx_stream.cs8"
+    assert lab067.FAILED_PACKETS == {1, 2, 3, 9, 15, 16}