83 lines
2.2 KiB
Go
83 lines
2.2 KiB
Go
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package geojson_test
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import (
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"strconv"
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"strings"
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"testing"
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"time"
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"b612.me/astro/eclipse"
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"b612.me/astro/geojson"
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)
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// 本文件钉住 §1.5 涉及的导出路径成本：掠食带的限线派生与打包足迹都在这条路径上。
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func review15BenchmarkDate(b *testing.B, text string) time.Time {
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b.Helper()
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if strings.HasPrefix(text, "-") {
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parts := strings.Split(strings.TrimPrefix(text, "-"), "-")
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if len(parts) != 3 {
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b.Fatalf("invalid astronomical date %q", text)
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}
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year, err := strconv.Atoi(parts[0])
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if err != nil {
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b.Fatal(err)
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}
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month, err := strconv.Atoi(parts[1])
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if err != nil {
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b.Fatal(err)
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}
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day, err := strconv.Atoi(parts[2])
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if err != nil {
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b.Fatal(err)
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}
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return time.Date(-year, time.Month(month), day, 12, 0, 0, 0, time.UTC)
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}
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date, err := time.Parse("2006-01-02", text)
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if err != nil {
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b.Fatal(err)
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}
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return date
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}
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func benchmarkReview15SolarEclipseMarshal(b *testing.B, text string) {
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date := review15BenchmarkDate(b, text)
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info, ok := eclipse.SolarEclipseOnDate(date)
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if !ok || !info.HasCentral {
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b.Fatalf("expected a central solar eclipse on %s", text)
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}
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partialOptions, pathOptions := grazingBandOptions(info, "overview")
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partial, ok := eclipse.SolarEclipsePartialFootprints(date, partialOptions)
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if !ok {
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b.Fatal("missing partial footprints")
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}
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central, ok := eclipse.SolarEclipseCentralPath(date, pathOptions)
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if !ok {
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b.Fatal("missing central path")
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}
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data, err := geojson.MarshalSolarEclipse(partial, ¢ral)
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if err != nil || len(data) == 0 {
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b.Fatalf("MarshalSolarEclipse() bytes=%d err=%v", len(data), err)
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}
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b.ReportAllocs()
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b.SetBytes(int64(len(data)))
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b.ResetTimer()
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for index := 0; index < b.N; index++ {
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value, err := geojson.MarshalSolarEclipse(partial, ¢ral)
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if err != nil || len(value) == 0 {
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b.Fatalf("MarshalSolarEclipse() bytes=%d err=%v", len(value), err)
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}
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}
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}
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func BenchmarkReview15SolarEclipseMarshalGrazing(b *testing.B) {
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for _, text := range []string{"2003-05-31", "1874-10-10", "2061-10-13"} {
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b.Run(text, func(b *testing.B) {
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benchmarkReview15SolarEclipseMarshal(b, text)
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})
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}
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}
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func BenchmarkReview15SolarEclipseMarshalOrdinary(b *testing.B) {
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benchmarkReview15SolarEclipseMarshal(b, "2024-04-08")
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}
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