60 lines
2.3 KiB
Go
60 lines
2.3 KiB
Go
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// 被测契约：2018 模型在中小相位角下与旧模型同量级，且不产生 NaN；大相位角两者本就分歧，只查有限。
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package basic
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import (
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"math"
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"testing"
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)
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func TestPlanetMagnitude2018CloseToClassic(t *testing.T) {
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classic := []func(float64) float64{nil, MercuryMag, VenusMag, MarsMag, JupiterMag, SaturnMag, UranusMag, NeptuneMag}
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limits := []float64{0, 0.6, 0.3, 0.3, 0.1, 0.5, 0.1, 0.2}
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for jd := 2451545.0; jd < 2462502; jd += 37.3 {
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for i := 1; i <= 7; i++ {
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got := planetMagnitude2018(i, jd, nil)
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if math.IsNaN(got) {
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t.Fatalf("index %d jd %.1f: NaN", i, jd)
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}
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if magnitudeTestPhase(i, jd) > 100 {
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continue
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}
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if d := math.Abs(got - classic[i](jd)); d > limits[i] {
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t.Errorf("index %d jd %.1f: 2018 %.3f vs classic %.2f", i, jd, got, classic[i](jd))
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}
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}
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}
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}
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func TestNeptuneMagnitude2018UnitEpochs(t *testing.T) {
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for _, c := range []struct{ jd, unit float64 }{
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{2444239.5 - 3653, -6.89}, {2451545.0 + 3653, -7.00},
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} {
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r, delta := NeptuneR(c.jd), EarthNeptuneAway(c.jd)
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got := planetMagnitude2018(7, c.jd, nil) - 5*math.Log10(r*delta)
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if math.Abs(got-c.unit) > 0.02 {
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t.Errorf("jd %.1f: unit magnitude %.3f, want about %.2f", c.jd, got, c.unit)
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}
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}
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}
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func magnitudeTestPhase(index int, jd float64) float64 {
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r, delta, earth := planetRWithInstance(index, jd, nil), planetEarthAwayWithInstance(index, jd, nil), planetRWithInstance(-1, jd, nil)
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return math.Acos((r*r+delta*delta-earth*earth)/(2*r*delta)) * 180 / math.Pi
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}
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// 输入取自模型作者随源码发布的测试行（日心距、地心距、相位角、子地/子日西经、日心黄经），期望值保留三位小数。
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func TestMarsMagnitude2018RotationAndSeason(t *testing.T) {
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for _, c := range [][7]float64{
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{1.381191244505, 0.37274381097911, 4.8948, 329.27, 330.76, 334.4996, -2.862},
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{1.664150453905, 2.58995164518460, 11.5877, 76.84, 64.66, 147.3485, 1.788},
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{1.591952180003, 3.85882552272013, 167.9000, 29.50, 221.11, 212.8886, 8.977},
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} {
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if got := marsMagnitude2018(c[0], c[1], c[2], c[3], c[4], c[5]); math.Abs(got-c[6]) > 0.001 {
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t.Errorf("got %.4f want %.3f", got, c[6])
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}
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}
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if d := marsStirling(&marsRotationCorrection, 359.999) - marsStirling(&marsRotationCorrection, 0); math.Abs(d) > 1e-3 {
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t.Errorf("rotation correction not continuous across 0°: %.4f", d)
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}
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}
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