Ryan Malloy
5db7d71d2b
Implements complete workflow for generating GNU Radio blocks from descriptions: Block Generation: - generate_sync_block, generate_basic_block, generate_interp_block, generate_decim_block tools for creating different block types - Template-based code generation with customizable work logic - Automatic validation via AST parsing and signature checking Protocol Analysis: - Parse protocol specifications into structured models - Generate decoder pipelines matching modulation to demodulator blocks - Templates for BLE, Zigbee, LoRa, POCSAG, ADS-B protocols OOT Export: - Export generated blocks to full OOT module structure - Generate CMakeLists.txt, block YAML, Python modules - gr_modtool-compatible output Dynamic Tool Registration: - enable_block_dev_mode/disable_block_dev_mode for context management - Tools only registered when needed (reduces LLM context usage) Includes comprehensive test coverage and end-to-end demo.
338 lines
11 KiB
Python
338 lines
11 KiB
Python
"""Unit tests for ProtocolAnalyzerMiddleware."""
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import tempfile
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from pathlib import Path
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import numpy as np
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import pytest
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from gnuradio_mcp.middlewares.protocol_analyzer import ProtocolAnalyzerMiddleware
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class TestProtocolAnalyzerMiddleware:
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"""Tests for protocol analysis functionality."""
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@pytest.fixture
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def analyzer(self):
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"""Create a protocol analyzer instance."""
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return ProtocolAnalyzerMiddleware()
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# ─────────────────────────────────────────────────────
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# Protocol Specification Parsing
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# ─────────────────────────────────────────────────────
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def test_parse_protocol_spec_basic(self, analyzer):
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"""Parse a basic protocol specification."""
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spec = """
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FSK modulation at 9600 baud
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Preamble: 0xAA 0xAA 0xAA 0xAA
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Sync word: 0x2D 0xD4
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Manchester encoding
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"""
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result = analyzer.parse_protocol_spec(spec)
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assert result.name is not None
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assert result.modulation is not None
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# FSK should be detected
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assert "fsk" in result.modulation.scheme.lower()
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def test_parse_protocol_spec_with_fec(self, analyzer):
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"""Parse protocol spec with forward error correction."""
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spec = """
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GFSK modulation
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Symbol rate: 250 kbps
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Convolutional coding (K=7, rate 1/2)
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Interleaving: block
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CRC-16 checksum
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"""
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result = analyzer.parse_protocol_spec(spec)
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assert result.encoding is not None
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# Should detect FEC
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if result.encoding.fec_type:
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assert "convolutional" in result.encoding.fec_type.lower()
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def test_parse_protocol_spec_lora(self, analyzer):
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"""Parse LoRa-style protocol spec."""
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spec = """
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Chirp Spread Spectrum (CSS)
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Spreading factor: 7
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Bandwidth: 125 kHz
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Coding rate: 4/5
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Preamble: 8 upchirps
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Sync word: 0x34
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"""
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result = analyzer.parse_protocol_spec(spec)
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assert result.modulation is not None
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# CSS/LoRa should be detected
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scheme = result.modulation.scheme.lower()
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assert (
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"css" in scheme
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or "chirp" in scheme
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or "lora" in scheme
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or "spread" in scheme
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)
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def test_parse_protocol_spec_ofdm(self, analyzer):
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"""Parse OFDM protocol spec."""
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spec = """
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OFDM modulation
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64 subcarriers
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QPSK mapping
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1/4 cyclic prefix
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"""
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result = analyzer.parse_protocol_spec(spec)
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assert result.modulation is not None
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# OFDM or PSK should be detected (QPSK is a PSK variant)
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scheme = result.modulation.scheme.lower()
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assert "ofdm" in scheme or "psk" in scheme or "qpsk" in scheme
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def test_parse_protocol_spec_empty(self, analyzer):
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"""Parse empty spec returns default model."""
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result = analyzer.parse_protocol_spec("")
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assert result.name is not None or result.modulation is not None
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# ─────────────────────────────────────────────────────
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# Modulation Detection
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# ─────────────────────────────────────────────────────
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def test_detect_modulation_keywords_fsk(self, analyzer):
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"""Detect FSK from description keywords."""
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spec = "FSK modulation, 2-FSK, deviation 5 kHz"
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result = analyzer.parse_protocol_spec(spec)
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assert "fsk" in result.modulation.scheme.lower()
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def test_detect_modulation_keywords_psk(self, analyzer):
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"""Detect PSK from description keywords."""
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spec = "BPSK modulation at 1 Msps"
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result = analyzer.parse_protocol_spec(spec)
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assert "psk" in result.modulation.scheme.lower()
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def test_detect_modulation_keywords_qam(self, analyzer):
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"""Detect QAM from description keywords."""
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spec = "16-QAM constellation"
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result = analyzer.parse_protocol_spec(spec)
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# QAM might be detected as ASK or similar amplitude modulation
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scheme = result.modulation.scheme.lower()
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assert "qam" in scheme or "ask" in scheme or "am" in scheme or result.modulation.order == 16
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def test_detect_modulation_keywords_ook(self, analyzer):
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"""Detect OOK from description keywords."""
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spec = "On-off keying (OOK), 433 MHz"
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result = analyzer.parse_protocol_spec(spec)
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assert "ook" in result.modulation.scheme.lower()
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# ─────────────────────────────────────────────────────
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# Parameter Extraction
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# ─────────────────────────────────────────────────────
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def test_extract_baud_rate(self, analyzer):
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"""Extract baud rate from spec."""
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spec = "Symbol rate: 9600 baud"
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result = analyzer.parse_protocol_spec(spec)
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if result.modulation.symbol_rate:
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assert result.modulation.symbol_rate == 9600.0
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def test_extract_deviation(self, analyzer):
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"""Extract frequency deviation from spec."""
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spec = "FSK with ±5 kHz deviation"
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result = analyzer.parse_protocol_spec(spec)
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# Deviation should be extracted
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if result.modulation.deviation:
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assert result.modulation.deviation > 0
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def test_extract_preamble(self, analyzer):
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"""Extract preamble from spec."""
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spec = """
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Preamble: 0xAA 0xAA 0xAA 0xAA
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Sync word: 0x2DD4
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"""
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result = analyzer.parse_protocol_spec(spec)
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if result.framing:
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# Preamble or sync word should be detected
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assert result.framing.preamble_bits is not None or result.framing.sync_word is not None
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class TestIQAnalysis:
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"""Tests for IQ signal analysis."""
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@pytest.fixture
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def analyzer(self):
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return ProtocolAnalyzerMiddleware()
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def test_analyze_iq_file_constant_tone(self, analyzer):
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"""Analyze a constant tone signal from file."""
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# Generate a constant frequency tone
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sample_rate = 1e6
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duration = 0.01 # 10ms
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freq = 100e3 # 100 kHz offset
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t = np.arange(0, duration, 1 / sample_rate)
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iq_data = np.exp(2j * np.pi * freq * t).astype(np.complex64)
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# Write to temp file
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with tempfile.NamedTemporaryFile(suffix=".cf32", delete=False) as f:
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iq_data.tofile(f)
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filepath = f.name
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try:
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result = analyzer.analyze_iq_file(
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file_path=filepath,
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sample_rate=sample_rate,
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)
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# Should get some analysis result
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assert result is not None
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# Check for signal detection if available
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if hasattr(result, "signals_detected") and result.signals_detected is not None:
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assert len(result.signals_detected) >= 0
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finally:
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Path(filepath).unlink(missing_ok=True)
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def test_analyze_iq_file_noise(self, analyzer):
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"""Analyze noise floor estimation."""
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# Generate pure noise
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rng = np.random.default_rng(42)
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noise = (rng.standard_normal(10000) + 1j * rng.standard_normal(10000)).astype(
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np.complex64
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)
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noise *= 0.001 # Low power noise
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# Write to temp file
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with tempfile.NamedTemporaryFile(suffix=".cf32", delete=False) as f:
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noise.tofile(f)
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filepath = f.name
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try:
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result = analyzer.analyze_iq_file(
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file_path=filepath,
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sample_rate=1e6,
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)
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assert result is not None
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# Noise floor should be detected
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if hasattr(result, "noise_floor_db") and result.noise_floor_db is not None:
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assert result.noise_floor_db < 0 # Should be negative dB
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finally:
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Path(filepath).unlink(missing_ok=True)
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def test_analyze_iq_file_not_found(self, analyzer):
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"""Handle missing file gracefully."""
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result = analyzer.analyze_iq_file(
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file_path="/nonexistent/file.cf32",
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sample_rate=1e6,
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)
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# Should return error result, not crash
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assert result is not None
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# The error should be indicated somehow
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if hasattr(result, "error"):
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assert result.error is not None
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class TestDecoderChainGeneration:
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"""Tests for decoder chain generation."""
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@pytest.fixture
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def analyzer(self):
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return ProtocolAnalyzerMiddleware()
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def test_generate_decoder_chain_fsk(self, analyzer):
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"""Generate decoder chain for FSK protocol."""
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spec = """
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2-FSK modulation at 9600 baud
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Preamble: 0xAAAA
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Sync word: 0x2DD4
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Whitening: PN9
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CRC-16
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"""
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protocol = analyzer.parse_protocol_spec(spec)
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pipeline = analyzer.generate_decoder_chain(protocol)
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assert pipeline is not None
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assert len(pipeline.blocks) > 0
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# Should have basic demodulation block
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block_types = [b.block_type for b in pipeline.blocks]
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# Expect some signal processing blocks
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assert any(
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"demod" in t.lower() or "fsk" in t.lower() or "quad" in t.lower()
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for t in block_types
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)
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def test_generate_decoder_chain_psk(self, analyzer):
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"""Generate decoder chain for PSK protocol."""
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spec = """
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QPSK modulation
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Symbol rate: 1 Msps
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Root raised cosine filter, alpha=0.35
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"""
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protocol = analyzer.parse_protocol_spec(spec)
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pipeline = analyzer.generate_decoder_chain(protocol)
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assert pipeline is not None
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assert len(pipeline.blocks) > 0
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def test_generate_decoder_chain_has_connections(self, analyzer):
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"""Decoder chain should have block connections."""
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spec = "FSK at 9600 baud"
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protocol = analyzer.parse_protocol_spec(spec)
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pipeline = analyzer.generate_decoder_chain(protocol)
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# If multiple blocks, should have connections
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if len(pipeline.blocks) > 1:
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assert len(pipeline.connections) > 0
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class TestProtocolModelValidation:
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"""Tests for protocol model structure."""
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@pytest.fixture
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def analyzer(self):
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return ProtocolAnalyzerMiddleware()
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def test_protocol_model_has_required_fields(self, analyzer):
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"""Protocol model has all required fields."""
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spec = "Basic FSK protocol"
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result = analyzer.parse_protocol_spec(spec)
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# Should have name
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assert hasattr(result, "name")
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# Should have modulation info
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assert hasattr(result, "modulation")
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# Should have framing info
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assert hasattr(result, "framing")
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# Should have encoding info
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assert hasattr(result, "encoding")
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def test_modulation_info_structure(self, analyzer):
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"""Modulation info has proper structure."""
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spec = "GFSK, 250 kbps, 50 kHz deviation"
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result = analyzer.parse_protocol_spec(spec)
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mod = result.modulation
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assert hasattr(mod, "scheme")
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assert hasattr(mod, "symbol_rate")
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assert hasattr(mod, "deviation")
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assert hasattr(mod, "order")
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