76 lines
2.8 KiB
Go
76 lines
2.8 KiB
Go
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package astro_test
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import (
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"errors"
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"math"
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"testing"
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"time"
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"b612.me/astro"
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"b612.me/astro/basic"
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"b612.me/astro/eclipse"
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"b612.me/astro/planet/spk"
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)
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type publicEphemerisEngine struct{}
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func (publicEphemerisEngine) State(target, center astro.Body, jde float64) ([3]float64, [3]float64, error) {
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return [3]float64{149597870.7, 0, 0}, [3]float64{}, nil
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}
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func (publicEphemerisEngine) Coverage(target astro.Body) (float64, float64, bool) {
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return 2400000, 2500000, true
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}
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var _ astro.Engine = publicEphemerisEngine{}
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var _ astro.Engine = (*spk.File)(nil)
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var _ func(float64, *astro.Instance) basic.LunarEclipseResult = basic.LunarEclipseWithInstance
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var _ func(float64, *astro.Instance) float64 = basic.MoonPhaseWithInstance
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var _ func(float64, *astro.Instance) float64 = basic.MercuryApparentLoWithInstance
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var _ func(float64, *astro.Instance) float64 = basic.HSunTrueLoWithInstance
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var _ func(int, int, *astro.Instance) float64 = basic.GetJQTimeWithInstance
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func TestP3PublicInstanceConstruction(t *testing.T) {
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for _, model := range []astro.EphemerisModel{astro.EphemerisLegacy, astro.EphemerisSemianalytic} {
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inst := mustInstance(t, model)
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if inst.Model() != model {
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t.Fatalf("model constructor lost identity: %v", inst.Model())
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}
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if result := basic.LunarEclipseWithInstance(basic.JDCalc(2022, 11, 8), inst); !result.HasTotal {
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t.Errorf("public model instance lost eclipse: %+v", result)
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}
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}
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inst := astro.NewInstance(publicEphemerisEngine{})
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position, _, err := inst.State(astro.BodySun, astro.BodyEarth, 2451545)
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if err != nil || position[0] != 149597870.7 || inst.Model() != astro.EphemerisCustom {
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t.Fatalf("custom instance: %v, %v", position, err)
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}
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if distance := basic.EarthAwayNWithInstance(2451545, -1, inst); math.Abs(distance-1) > 1e-9 {
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t.Errorf("public instance could not reach basic: %v", distance)
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}
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_, _, _, err = inst.Apparent(astro.BodySun, 2451545)
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if !errors.Is(err, astro.ErrEphemerisUnsupportedApparent) {
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t.Errorf("public error identity was lost: %v", err)
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}
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if longitude := basic.HSunTrueLoWithInstance(2451545, astro.NewInstance(nil)); !math.IsNaN(longitude) {
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t.Errorf("empty custom engine fell back: %v", longitude)
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}
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}
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func TestNewModelInstanceRejectsNonBuiltin(t *testing.T) {
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for _, model := range []astro.EphemerisModel{astro.EphemerisCustom, astro.EphemerisModel(42)} {
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if inst, err := astro.NewModelInstance(model); inst != nil || !errors.Is(err, astro.ErrUnknownModel) {
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t.Errorf("model %v: inst=%v err=%v", model, inst, err)
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}
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}
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}
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func TestP3PublicLunarDateQuery(t *testing.T) {
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inst := mustInstance(t, astro.EphemerisSemianalytic)
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date := time.Date(2022, 11, 8, 12, 0, 0, 0, time.UTC)
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info, ok := eclipse.LunarEclipseOnDateWithInstance(date, inst)
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if !ok || !info.HasTotal {
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t.Errorf("public instance did not reach eclipse query: %+v", info)
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}
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}
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