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gps-denied-onboard/tests/test_satellite.py
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Python

"""Tests for SatelliteDataManager (F04) and mercator utils (H06)."""
import asyncio
import numpy as np
import pytest
from gps_denied.core.satellite import SatelliteDataManager
from gps_denied.schemas import GPSPoint
from gps_denied.utils import mercator
def test_latlon_to_tile():
# Kyiv coordinates
lat = 50.4501
lon = 30.5234
zoom = 15
coords = mercator.latlon_to_tile(lat, lon, zoom)
assert coords.zoom == 15
assert coords.x > 0
assert coords.y > 0
def test_tile_to_latlon():
x, y, zoom = 19131, 10927, 15
gps = mercator.tile_to_latlon(x, y, zoom)
assert 50.0 < gps.lat < 52.0
assert 30.0 < gps.lon < 31.0
def test_tile_bounds():
coords = mercator.TileCoords(x=19131, y=10927, zoom=15)
bounds = mercator.compute_tile_bounds(coords)
# Northwest should be "higher" lat and "lower" lon than Southeast
assert bounds.nw.lat > bounds.se.lat
assert bounds.nw.lon < bounds.se.lon
assert bounds.gsd > 0
@pytest.fixture
def satellite_manager(tmp_path):
# Use tmp_path for cache so we don't pollute workspace
sm = SatelliteDataManager(cache_dir=str(tmp_path / "cache"), max_size_gb=0.1)
yield sm
sm.cache.close()
asyncio.run(sm.http_client.aclose())
@pytest.mark.asyncio
async def test_satellite_fetch_and_cache(satellite_manager):
lat = 48.0
lon = 37.0
zoom = 12
flight_id = "test_flight"
# We won't test the actual HTTP Google API in CI to avoid blocks/bans,
# but we can test the cache mechanism directly.
coords = satellite_manager.compute_tile_coords(lat, lon, zoom)
# Create a fake image (blue square 256x256)
fake_img = np.zeros((256, 256, 3), dtype=np.uint8)
fake_img[:] = [255, 0, 0] # BGR
# Save to cache
success = satellite_manager.cache_tile(flight_id, coords, fake_img)
assert success is True
# Read from cache
cached = satellite_manager.get_cached_tile(flight_id, coords)
assert cached is not None
assert cached.shape == (256, 256, 3)
# Clear cache
satellite_manager.clear_flight_cache(flight_id)
assert satellite_manager.get_cached_tile(flight_id, coords) is None
def test_grid_calculations(satellite_manager):
# Test 3x3 grid (9 tiles)
center = mercator.TileCoords(x=100, y=100, zoom=15)
grid = satellite_manager.get_tile_grid(center, 9)
assert len(grid) == 9
# Ensure center is in grid
assert any(c.x == 100 and c.y == 100 for c in grid)
# Test expansion 9 -> 25
new_tiles = satellite_manager.expand_search_grid(center, 9, 25)
assert len(new_tiles) == 16 # 25 - 9