Graham McIntire
250709a1b2
- ScoreCache stores {band, valid_time} as %{{lat, lon} => score} map so
point lookups are O(1); adds fetch_point/4 and valid_times/1
- available_valid_times/1 reads directly from ScoreCache when warm,
falls back to DB on cold start
- point_forecast/3 iterates cached valid_times and uses fetch_point/4
instead of hitting the DB per click
- NexradCache: node-local ETS cache of decoded n0q PNG pixel buffers
keyed by 5-minute rounded timestamp; skips ~1-5s HTTP+decode on
concurrent/repeat clicks within the same window
- MapLive: start_async the rain_scatter fetch so point_detail renders
immediately with a pending marker; push rain_scatter_update when
NEXRAD resolves
- MapLive: preload all 18 remaining forecast hours for the current
viewport after mount/band change/propagation_updated; client caches
them and renders timeline scrubs instantly without a server roundtrip.
Adds set_selected_time event for fast-path state sync.
- Propagation map JS: forecastCache map + drawScatterMarkers helper,
timeline click uses preloaded cache when available
256 lines
8.5 KiB
Elixir
256 lines
8.5 KiB
Elixir
defmodule Microwaveprop.PropagationTest do
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use Microwaveprop.DataCase, async: false
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alias Microwaveprop.Propagation
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alias Microwaveprop.Propagation.GridScore
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alias Microwaveprop.Propagation.ScoreCache
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setup do
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ScoreCache.clear()
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:ok
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end
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describe "score_grid_point/4" do
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test "scores a single point for all bands" do
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hrrr_profile = %{
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surface_temp_c: 25.0,
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surface_dewpoint_c: 18.0,
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surface_pressure_mb: 1013.0,
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hpbl_m: 500.0,
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wind_u: 3.0,
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wind_v: 2.0,
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cloud_cover_pct: 15.0,
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precip_mm: 0.0,
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profile: [
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%{"pres" => 1000.0, "tmpc" => 25.0, "dwpc" => 18.0, "hght" => 100.0},
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%{"pres" => 975.0, "tmpc" => 22.0, "dwpc" => 15.0, "hght" => 350.0},
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%{"pres" => 950.0, "tmpc" => 19.0, "dwpc" => 10.0, "hght" => 600.0}
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]
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}
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valid_time = ~U[2026-07-15 13:00:00Z]
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results = Propagation.score_grid_point(hrrr_profile, valid_time, 33.0, -97.0)
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assert length(results) == 13
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Enum.each(results, fn result ->
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assert result.score >= 0 and result.score <= 100
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assert is_map(result.factors)
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assert is_integer(result.band_mhz)
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end)
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end
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end
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describe "upsert_scores/1" do
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test "inserts scores" do
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valid_time = ~U[2026-07-15 13:00:00Z]
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scores = [
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%{lat: 35.0, lon: -97.0, valid_time: valid_time, band_mhz: 10_000, score: 75, factors: %{humidity: 90}},
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%{lat: 35.0, lon: -97.0, valid_time: valid_time, band_mhz: 24_000, score: 60, factors: %{humidity: 40}}
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]
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assert {:ok, 2} = Propagation.upsert_scores(scores)
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assert Repo.aggregate(GridScore, :count) == 2
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end
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test "upserts on conflict" do
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valid_time = ~U[2026-07-15 13:00:00Z]
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scores = [
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%{lat: 35.0, lon: -97.0, valid_time: valid_time, band_mhz: 10_000, score: 75, factors: %{}}
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]
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Propagation.upsert_scores(scores)
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Propagation.upsert_scores([%{hd(scores) | score: 80}])
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assert Repo.aggregate(GridScore, :count) == 1
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end
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end
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describe "latest_scores/1" do
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test "returns latest scores for a band" do
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valid_time = ~U[2026-07-15 13:00:00Z]
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scores = [
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%{lat: 35.0, lon: -97.0, valid_time: valid_time, band_mhz: 10_000, score: 75, factors: %{}},
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%{lat: 36.0, lon: -96.0, valid_time: valid_time, band_mhz: 10_000, score: 80, factors: %{}}
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]
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Propagation.upsert_scores(scores)
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results = Propagation.latest_scores(10_000)
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assert length(results) == 2
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end
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test "returns empty list when no data" do
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assert Propagation.latest_scores(10_000) == []
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end
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end
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describe "scores_at/3 with cache" do
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test "populates the cache on a DB miss" do
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valid_time = ~U[2026-07-15 13:00:00Z]
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Propagation.upsert_scores([
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%{lat: 35.0, lon: -97.0, valid_time: valid_time, band_mhz: 10_000, score: 75, factors: %{}}
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])
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assert ScoreCache.fetch(10_000, valid_time) == :miss
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_ = Propagation.scores_at(10_000, valid_time)
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assert {:ok, [%{lat: 35.0, lon: -97.0, score: 75}]} = ScoreCache.fetch(10_000, valid_time)
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end
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test "returns cached bounds-filtered results without hitting the DB" do
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valid_time = ~U[2026-07-15 13:00:00Z]
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# Seed the cache directly — DB is empty, so if the result matches the
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# cached payload we know the DB was not consulted.
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ScoreCache.put(10_000, valid_time, [
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%{lat: 32.0, lon: -97.0, score: 75},
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%{lat: 40.0, lon: -74.0, score: 50}
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])
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assert Repo.aggregate(GridScore, :count) == 0
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bounds = %{"south" => 30.0, "north" => 35.0, "west" => -100.0, "east" => -95.0}
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result = Propagation.scores_at(10_000, valid_time, bounds)
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assert length(result) == 1
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assert [%{lat: 32.0, lon: -97.0, score: 75}] = result
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end
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test "returns empty list when no data in cache or DB" do
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assert Propagation.scores_at(10_000, ~U[2026-07-15 13:00:00Z]) == []
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end
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end
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describe "point_forecast/3 with cache" do
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test "returns forecast timeline from cached scores when warm" do
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t1 = DateTime.truncate(DateTime.add(DateTime.utc_now(), 3600, :second), :second)
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t2 = DateTime.add(t1, 3600, :second)
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ScoreCache.put(10_000, t1, [%{lat: 32.875, lon: -97.0, score: 70}])
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ScoreCache.put(10_000, t2, [%{lat: 32.875, lon: -97.0, score: 75}])
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assert Repo.aggregate(GridScore, :count) == 0
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result = Propagation.point_forecast(10_000, 32.875, -97.0)
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assert [
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%{valid_time: ^t1, score: 70},
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%{valid_time: ^t2, score: 75}
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] = result
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end
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test "filters past valid_times out" do
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past = DateTime.add(DateTime.utc_now(), -3600, :second) |> DateTime.truncate(:second)
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future = DateTime.add(DateTime.utc_now(), 3600, :second) |> DateTime.truncate(:second)
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ScoreCache.put(10_000, past, [%{lat: 32.875, lon: -97.0, score: 60}])
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ScoreCache.put(10_000, future, [%{lat: 32.875, lon: -97.0, score: 80}])
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result = Propagation.point_forecast(10_000, 32.875, -97.0)
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assert [%{valid_time: ^future, score: 80}] = result
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end
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test "snaps coordinates to the nearest grid point" do
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valid_time = DateTime.truncate(DateTime.add(DateTime.utc_now(), 3600, :second), :second)
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ScoreCache.put(10_000, valid_time, [%{lat: 32.875, lon: -97.0, score: 65}])
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# Off-grid query snaps to 32.875, -97.0
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result = Propagation.point_forecast(10_000, 32.88, -96.98)
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assert [%{valid_time: ^valid_time, score: 65}] = result
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end
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test "returns empty list when no cached or DB data for the point" do
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assert Propagation.point_forecast(10_000, 32.875, -97.0) == []
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end
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end
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describe "available_valid_times/1 with cache" do
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test "returns cached valid_times without hitting the DB when cache is warm" do
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t1 = DateTime.truncate(DateTime.utc_now(), :second)
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t2 = DateTime.add(t1, 3600, :second)
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ScoreCache.put(10_000, t1, [])
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ScoreCache.put(10_000, t2, [])
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assert Repo.aggregate(GridScore, :count) == 0
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assert Propagation.available_valid_times(10_000) == [t1, t2]
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end
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test "filters cached times older than the 1-hour cutoff" do
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now = DateTime.truncate(DateTime.utc_now(), :second)
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stale = DateTime.add(now, -7200, :second)
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fresh = DateTime.add(now, 1800, :second)
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ScoreCache.put(10_000, stale, [])
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ScoreCache.put(10_000, fresh, [])
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assert Propagation.available_valid_times(10_000) == [fresh]
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end
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test "falls back to DB on cold cache" do
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valid_time = DateTime.truncate(DateTime.utc_now(), :second)
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Propagation.upsert_scores([
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%{lat: 35.0, lon: -97.0, valid_time: valid_time, band_mhz: 10_000, score: 75, factors: %{}}
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])
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assert ScoreCache.valid_times(10_000) == []
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assert Propagation.available_valid_times(10_000) == [valid_time]
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end
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end
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describe "warm_cache_and_broadcast/2" do
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test "loads scores from DB into the cache" do
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valid_time = ~U[2026-07-15 13:00:00Z]
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Propagation.upsert_scores([
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%{lat: 35.0, lon: -97.0, valid_time: valid_time, band_mhz: 10_000, score: 75, factors: %{}},
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%{lat: 36.0, lon: -96.0, valid_time: valid_time, band_mhz: 10_000, score: 80, factors: %{}}
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])
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assert ScoreCache.fetch(10_000, valid_time) == :miss
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Propagation.warm_cache_and_broadcast(10_000, valid_time)
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ScoreCache.sync()
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assert {:ok, scores} = ScoreCache.fetch(10_000, valid_time)
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assert length(scores) == 2
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end
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test "only warms the requested band" do
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valid_time = ~U[2026-07-15 13:00:00Z]
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Propagation.upsert_scores([
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%{lat: 35.0, lon: -97.0, valid_time: valid_time, band_mhz: 10_000, score: 75, factors: %{}},
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%{lat: 35.0, lon: -97.0, valid_time: valid_time, band_mhz: 24_000, score: 30, factors: %{}}
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])
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Propagation.warm_cache_and_broadcast(10_000, valid_time)
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ScoreCache.sync()
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assert {:ok, [_]} = ScoreCache.fetch(10_000, valid_time)
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assert ScoreCache.fetch(24_000, valid_time) == :miss
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end
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end
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describe "latest_valid_time/0" do
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test "returns nil when empty" do
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assert Propagation.latest_valid_time() == nil
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end
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test "returns most recent time" do
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t1 = ~U[2026-07-15 12:00:00Z]
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t2 = ~U[2026-07-15 13:00:00Z]
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Propagation.upsert_scores([
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%{lat: 35.0, lon: -97.0, valid_time: t1, band_mhz: 10_000, score: 50, factors: %{}},
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%{lat: 35.0, lon: -97.0, valid_time: t2, band_mhz: 10_000, score: 60, factors: %{}}
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])
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assert Propagation.latest_valid_time() == t2
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end
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end
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end
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