34 lines
1.3 KiB
Go
34 lines
1.3 KiB
Go
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package coord
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import (
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"math"
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"testing"
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"b612.me/astro/formula"
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)
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func TestAirmassWrappers(t *testing.T) {
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assertClose(t, "plane-parallel wrapper", AirmassPlaneParallelFromTrueAltitude(30), formula.AirmassPlaneParallel(30), 1e-15)
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assertClose(t, "kasten-young apparent wrapper", AirmassKastenYoungFromApparentAltitude(30), formula.AirmassKastenYoung(30), 1e-15)
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assertClose(t, "pickering apparent wrapper", AirmassPickeringFromApparentAltitude(30), formula.AirmassPickering(30), 1e-15)
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}
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func TestAirmassTrueAltitudeWrappers(t *testing.T) {
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trueAltitude := 5.0
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pressureHPa := 1013.25
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temperatureC := 10.0
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apparentAltitude := ApparentAltitude(trueAltitude, pressureHPa, temperatureC)
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gotKastenYoung := AirmassKastenYoungFromTrueAltitude(trueAltitude, pressureHPa, temperatureC)
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wantKastenYoung := formula.AirmassKastenYoung(apparentAltitude)
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assertClose(t, "kasten-young true-alt wrapper", gotKastenYoung, wantKastenYoung, 1e-12)
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gotPickering := AirmassPickeringFromTrueAltitude(trueAltitude, pressureHPa, temperatureC)
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wantPickering := formula.AirmassPickering(apparentAltitude)
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assertClose(t, "pickering true-alt wrapper", gotPickering, wantPickering, 1e-12)
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if math.IsNaN(gotKastenYoung) || math.IsNaN(gotPickering) {
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t.Fatal("expected finite airmass values for low but above-horizon altitude")
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}
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}
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