package ephemeris

import (
	"testing"
	"time"
)

func TestSunMay1990(t *testing.T) {
	if !Ready() {
		t.Fatal("ephemeris not ready")
	}
	// 1990-05-12 10:30 CST = 02:30 UTC
	utc := time.Date(1990, 5, 12, 2, 30, 0, 0, time.UTC)
	jd := JulianDayUT(utc)
	lon, err := PlanetLon(jd, BodySun)
	if err != nil {
		t.Fatal(err)
	}
	// ~51° Taurus
	if lon < 48 || lon > 55 {
		t.Fatalf("sun lon=%.2f want ~51°", lon)
	}
	asc, err := Ascendant(jd, 31.23, 121.47)
	if err != nil {
		t.Fatal(err)
	}
	if asc < 0 || asc >= 360 {
		t.Fatalf("bad asc %.2f", asc)
	}
	if Backend() == "" {
		t.Fatal("empty backend")
	}
}

func TestAllPlanetLons(t *testing.T) {
	jd := JulianDayUT(time.Date(2000, 1, 1, 12, 0, 0, 0, time.UTC))
	m, err := AllPlanetLons(jd)
	if err != nil {
		t.Fatal(err)
	}
	if len(m) != len(PlanetOrder) {
		t.Fatalf("got %d", len(m))
	}
}