Graham McIntire
9abbb83469
- Replace %Struct{} with Struct.t() in all @spec annotations
- Replace length(x) > 0 with x != [] in test assertions
- Fix multi-line spec struct references in weather.ex
72 lines
2.2 KiB
Elixir
72 lines
2.2 KiB
Elixir
defmodule Microwaveprop.Weather.FrontalAnalysisTest do
|
|
use ExUnit.Case, async: true
|
|
|
|
alias Microwaveprop.Weather.FrontalAnalysis
|
|
|
|
@grid_spec %{lat_start: 30.0, lat_step: 0.5, lon_start: -100.0, lon_step: 0.5}
|
|
|
|
describe "detect_fronts/3" do
|
|
test "finds no fronts in a uniform temperature field" do
|
|
# 10x10 grid, all same temperature and pressure
|
|
temp = Nx.broadcast(295.0, {10, 10})
|
|
pres = Nx.broadcast(101_325.0, {10, 10})
|
|
|
|
result = FrontalAnalysis.detect_fronts(temp, pres, @grid_spec)
|
|
|
|
assert result.front_points == []
|
|
end
|
|
|
|
test "detects a front at a sharp east-west temperature boundary" do
|
|
# North half cold (280K), south half warm (300K) → sharp gradient mid-grid
|
|
cold = Nx.broadcast(280.0, {5, 10})
|
|
warm = Nx.broadcast(300.0, {5, 10})
|
|
temp = Nx.concatenate([cold, warm], axis: 0)
|
|
pres = Nx.broadcast(101_325.0, {10, 10})
|
|
|
|
result = FrontalAnalysis.detect_fronts(temp, pres, @grid_spec)
|
|
|
|
# Should find front points near the boundary (rows 4-5)
|
|
assert result.front_points != []
|
|
|
|
# All front points should be near the middle rows
|
|
Enum.each(result.front_points, fn {lat, _lon, _bearing} ->
|
|
assert lat >= 31.5 and lat <= 34.0
|
|
end)
|
|
end
|
|
end
|
|
|
|
describe "nearest_front/3" do
|
|
test "returns the closest front point with distance and bearing" do
|
|
front_points = [
|
|
{33.0, -97.0, 90.0},
|
|
{35.0, -97.0, 45.0}
|
|
]
|
|
|
|
result = FrontalAnalysis.nearest_front(front_points, 33.1, -97.1)
|
|
assert result.distance_km < 20.0
|
|
assert result.front_bearing_deg == 90.0
|
|
end
|
|
|
|
test "returns nil for empty front_points" do
|
|
assert FrontalAnalysis.nearest_front([], 33.0, -97.0) == nil
|
|
end
|
|
end
|
|
|
|
describe "path_front_angle/2" do
|
|
test "parallel paths return 0" do
|
|
assert FrontalAnalysis.path_front_angle(90.0, 90.0) == 0.0
|
|
end
|
|
|
|
test "perpendicular paths return 90" do
|
|
assert FrontalAnalysis.path_front_angle(0.0, 90.0) == 90.0
|
|
end
|
|
|
|
test "anti-parallel paths return 0" do
|
|
assert FrontalAnalysis.path_front_angle(180.0, 0.0) == 0.0
|
|
end
|
|
|
|
test "45-degree offset returns 45" do
|
|
assert_in_delta FrontalAnalysis.path_front_angle(45.0, 90.0), 45.0, 0.01
|
|
end
|
|
end
|
|
end
|