b612
16c62a97d5
- 新增时标、ΔT 模型、质心时间与 UT1 支持 - 改进日月食、月掩、行星事件及路径边界计算 - 完善恒星三维自行与动态距离传播 - 扩展 SVG、GeoJSON、KML 输出与底层距离换算工具 - 整理中英文手册、示例资源及回归测试
108 lines
3.7 KiB
Go
108 lines
3.7 KiB
Go
package geojson
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import (
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"encoding/json"
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"math"
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"testing"
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"time"
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eclipsecore "b612.me/astro/eclipse"
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)
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// 带宽契约：单侧极限事件的 path_width_km 与"非中心食"一样是 0，消费者只能靠
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// path_width_defined 区分，该键必须与 path_width_km 并列出现在同一份 properties 里。
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func TestSolarEclipseMetadataPathWidthDefined(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, time.January, 7, 0, 0, 0, 0, time.UTC)},
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{name: "2003-05-31 single-sided limit", date: time.Date(2003, time.May, 31, 0, 0, 0, 0, time.UTC)},
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{name: "1874-10-10 single-sided limit", date: time.Date(1874, time.October, 10, 0, 0, 0, 0, time.UTC)},
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{name: "2024-04-08 total", date: time.Date(2024, time.April, 8, 0, 0, 0, 0, time.UTC), defined: true, widthKM: 198.6161},
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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, ok := eclipsecore.SolarEclipseOnDate(tc.date)
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if !ok {
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t.Fatalf("no solar eclipse on %v", tc.date)
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}
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properties := solarEclipseMetadata(info)
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defined, isBool := properties["path_width_defined"].(bool)
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if !isBool {
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t.Fatalf("path_width_defined=%#v, want a bool", properties["path_width_defined"])
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}
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if defined != tc.defined {
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t.Fatalf("path_width_defined=%v want %v", defined, tc.defined)
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}
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if defined != info.PathWidthDefined {
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t.Fatalf("path_width_defined=%v disagrees with eclipse.PathWidthDefined=%v", defined, info.PathWidthDefined)
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}
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width, isFloat := properties["path_width_km"].(float64)
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if !isFloat {
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t.Fatalf("path_width_km=%#v, want a number", properties["path_width_km"])
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}
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if !tc.defined {
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if width != 0 {
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t.Fatalf("path_width_km=%.6f with an undefined width, want 0", width)
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}
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return
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}
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if math.Abs(width-tc.widthKM) > 0.01 {
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t.Fatalf("path_width_km=%.6f want %.6f", width, tc.widthKM)
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}
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})
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}
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}
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func TestMarshalSolarEclipseCarriesPathWidthDefined(t *testing.T) {
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date := time.Date(2024, time.April, 8, 0, 0, 0, 0, time.UTC)
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partial, ok := eclipsecore.SolarEclipsePartialFootprints(date, eclipsecore.SolarEclipsePartialFootprintOptions{
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Step: 20 * time.Minute, BoundaryPoints: 36,
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})
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if !ok {
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t.Fatalf("no partial footprints on %v", date)
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}
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central, hasCentral := eclipsecore.SolarEclipseCentralPath(date, eclipsecore.SolarEclipsePathOptions{Step: 5 * time.Minute})
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var centralPath *eclipsecore.SolarEclipsePath
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if hasCentral {
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centralPath = ¢ral
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}
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data, err := MarshalSolarEclipse(partial, centralPath)
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if err != nil {
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t.Fatalf("MarshalSolarEclipse: %v", err)
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}
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var collection featureCollection
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if err := json.Unmarshal(data, &collection); err != nil {
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t.Fatalf("decode: %v", err)
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}
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if len(collection.Features) == 0 {
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t.Fatal("no features exported")
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}
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// 带宽两个键只在食甚点要素上出现；其余要素沿用最小 properties。
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seen := 0
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for index, item := range collection.Features {
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if item.Properties["role"] != "greatest" {
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continue
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}
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defined, ok := item.Properties["path_width_defined"].(bool)
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if !ok {
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t.Fatalf("greatest feature has no boolean path_width_defined: %#v", item.Properties["path_width_defined"])
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}
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width, ok := item.Properties["path_width_km"].(float64)
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if !ok {
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t.Fatalf("greatest feature has no numeric path_width_km: %#v", item.Properties["path_width_km"])
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}
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if !defined || math.Abs(width-198.6161) > 0.01 {
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t.Fatalf("greatest feature %d path_width_km=%.6f path_width_defined=%v, want 198.6161/true", index, width, defined)
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}
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seen++
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}
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if seen != 1 {
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t.Fatalf("greatest features with width properties = %d, want exactly one", seen)
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}
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}
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