56 lines
2.0 KiB
Go
56 lines
2.0 KiB
Go
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package eclipse
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import (
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"math"
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"testing"
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"time"
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)
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// basic 与 eclipse 两层必须给出同一个带宽口径标志：单侧极限事件带宽无定义且值恒为 0。
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func TestSolarEclipsePathCarriesPathWidthDefinition(t *testing.T) {
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testCases := []struct {
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name string
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date time.Time
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defined bool
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widthKM float64
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}{
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{name: "-1404-01-07 single-sided limit", date: time.Date(-1404, 1, 7, 0, 0, 0, 0, time.UTC)},
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{name: "2003-05-31 single-sided limit with limit lines", date: time.Date(2003, 5, 31, 0, 0, 0, 0, time.UTC)},
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{name: "2024-04-08 total", date: time.Date(2024, 4, 8, 0, 0, 0, 0, time.UTC), defined: true, widthKM: 198.6161},
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{name: "2010-01-15 annular", date: time.Date(2010, 1, 15, 0, 0, 0, 0, time.UTC), defined: true, widthKM: 335.0298},
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}
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for _, tc := range testCases {
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t.Run(tc.name, func(t *testing.T) {
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info := ClosestSolarEclipse(tc.date)
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if info.PathWidthDefined != tc.defined {
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t.Fatalf("info.PathWidthDefined=%v want %v", info.PathWidthDefined, tc.defined)
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}
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if !tc.defined && info.PathWidthKM != 0 {
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t.Fatalf("undefined info width %.4f", info.PathWidthKM)
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}
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path, ok := SolarEclipseCentralPath(tc.date, SolarEclipsePathOptions{})
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if !ok {
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t.Fatalf("no central path")
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}
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if path.PathWidthDefined != tc.defined || path.Eclipse.PathWidthDefined != tc.defined {
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t.Fatalf("defined=%v eclipse=%v want %v", path.PathWidthDefined, path.Eclipse.PathWidthDefined, tc.defined)
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}
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if !tc.defined {
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if path.Eclipse.PathWidthKM != 0 || path.Greatest.WidthKM != 0 {
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t.Fatalf("undefined width leaks: eclipse=%.4f greatest=%.4f",
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path.Eclipse.PathWidthKM, path.Greatest.WidthKM)
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}
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return
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}
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if math.Abs(path.Eclipse.PathWidthKM-tc.widthKM) > 0.01 {
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t.Fatalf("path width %.4f want %.4f", path.Eclipse.PathWidthKM, tc.widthKM)
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}
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if path.Eclipse.PathWidthKM > 0 && (len(path.NorthernLimit) == 0 || len(path.SouthernLimit) == 0) {
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t.Fatalf("width %.4f km with limits %d/%d", path.Eclipse.PathWidthKM,
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len(path.NorthernLimit), len(path.SouthernLimit))
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}
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})
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}
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}
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