49 lines
1.6 KiB
Go
49 lines
1.6 KiB
Go
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package moon
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import (
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"math"
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"testing"
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"time"
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"b612.me/astro/basic"
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)
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func TestBrightLimbPositionAngleWrapperMatchesBasic(t *testing.T) {
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date := time.Date(2026, 4, 28, 9, 30, 45, 0, time.UTC)
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jd := observationTT(date)
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got := BrightLimbPositionAngle(date)
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want := basic.MoonBrightLimbPositionAngleN(jd, -1)
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if math.Float64bits(got) != math.Float64bits(want) {
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t.Fatalf("BrightLimbPositionAngle mismatch: got %.18f want %.18f", got, want)
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}
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}
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func TestTopocentricBrightLimbPositionAngleWrapperMatchesBasic(t *testing.T) {
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date := time.Date(2026, 4, 28, 9, 30, 45, 0, time.UTC)
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jd := observationTT(date)
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observerLon := 121.4737
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observerLat := 31.2304
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height := 4.0
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got := TopocentricBrightLimbPositionAngle(date, observerLon, observerLat, height)
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want := basic.MoonTopocentricBrightLimbPositionAngleN(jd, observerLon, observerLat, height, -1)
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if math.Float64bits(got) != math.Float64bits(want) {
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t.Fatalf("TopocentricBrightLimbPositionAngle mismatch: got %.18f want %.18f", got, want)
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}
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}
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func TestTopocentricBrightLimbPositionAnglePreservesInstantAcrossTimezones(t *testing.T) {
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utc := time.Date(2026, 4, 28, 9, 30, 45, 123000000, time.UTC)
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shanghai := utc.In(time.FixedZone("UTC+8", 8*3600))
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observerLon := 121.4737
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observerLat := 31.2304
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height := 4.0
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got := TopocentricBrightLimbPositionAngle(shanghai, observerLon, observerLat, height)
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want := TopocentricBrightLimbPositionAngle(utc, observerLon, observerLat, height)
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if math.Float64bits(got) != math.Float64bits(want) {
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t.Fatalf("timezone instant mismatch: got %.18f want %.18f", got, want)
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}
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}
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