88 lines
2.8 KiB
Go
88 lines
2.8 KiB
Go
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package svg
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import (
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"strings"
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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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// 核心判定当天无日食时，三个日食图入口都必须返回 false，与 LunarEclipseMapSVG 的日期门一致；
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// 偏食足迹是“取最近一次”语义，缺这道门会把邻近日期的图当成当天的图交出去。
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func TestSolarEclipseMapSVGRequiresEclipseOnDate(t *testing.T) {
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type entry struct {
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name string
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render func(time.Time, SolarEclipseMapSVGOptions) (string, bool)
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global func(time.Time) (eclipsecore.SolarEclipseInfo, bool)
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}
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entries := []entry{
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{
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name: "default",
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render: SolarEclipseMapSVG,
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global: eclipsecore.SolarEclipseOnDateNASABulletinSplitK,
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},
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{
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name: "nasaSplitK",
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render: SolarEclipseMapSVGNASABulletinSplitK,
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global: eclipsecore.SolarEclipseOnDateNASABulletinSplitK,
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},
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{
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name: "iauSingleK",
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render: SolarEclipseMapSVGIAUSingleK,
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global: eclipsecore.SolarEclipseOnDateIAUSingleK,
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},
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}
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// 2024-04-08 是本组日期里唯一有日食的一天，其余都在最近一次日食前后半个朔望月内。
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for _, test := range []struct {
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day string
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want bool
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}{
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{day: "2024-04-08", want: true},
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{day: "2024-04-15"},
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{day: "2024-04-20"},
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{day: "2024-04-23"},
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{day: "2024-04-24"},
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} {
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date, err := time.Parse("2006-01-02", test.day)
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if err != nil {
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t.Fatalf("bad fixture date %q: %v", test.day, err)
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}
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for _, entry := range entries {
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_, coreOK := entry.global(date)
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if coreOK != test.want {
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t.Fatalf("%s %s: core eclipse gate = %v, want %v", entry.name, test.day, coreOK, test.want)
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}
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rendered, ok := entry.render(date, SolarEclipseMapSVGOptions{
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Width: 900, Height: 620, Location: time.UTC, PartialStep: 10 * time.Minute,
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})
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if ok != test.want {
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t.Fatalf("%s %s: map gate = %v, want %v (core says %v)", entry.name, test.day, ok, test.want, coreOK)
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}
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if test.want && rendered == "" {
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t.Fatalf("%s %s: gate passed but the map is empty", entry.name, test.day)
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}
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if !test.want && rendered != "" {
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t.Fatalf("%s %s: rejected date still returned %d bytes", entry.name, test.day, len(rendered))
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}
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}
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}
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}
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// 过了日期门的日期必须仍带完整等时线层：等时线自己还要查一次核心，门不能把它挡掉。
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func TestSolarEclipseMapOnDateKeepsIsochrones(t *testing.T) {
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rendered, ok := SolarEclipseMapSVG(
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time.Date(2024, time.April, 8, 0, 0, 0, 0, time.UTC),
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SolarEclipseMapSVGOptions{
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Width: 900, Height: 620, Location: time.UTC,
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PartialStep: 10 * time.Minute, GreatestTimeStep: 30 * time.Minute,
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},
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)
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if !ok {
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t.Fatal("2024-04-08 is an eclipse date but the map was rejected")
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}
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if got := strings.Count(rendered, `class="solar-greatest-time-isoline"`); got != 7 {
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t.Fatalf("isochrone paths = %d, want the full 7-branch fan", got)
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}
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}
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