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
3.9 KiB
Go
108 lines
3.9 KiB
Go
package svg
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import (
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"fmt"
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"strings"
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"testing"
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"time"
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"b612.me/astro/internal/svgchart"
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)
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// 页脚排版契约：任何文字的下沿都要离画布底边留出余量，避免末行贴边或被裁掉。
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const occultationChartBottomMarginMinimum = 6.0
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func occultationBottomMarginViolations(t *testing.T, diagram string, height int) []string {
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t.Helper()
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violations := []string{}
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for _, text := range occultationSVGTexts(t, diagram) {
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if text.value == "" {
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continue
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}
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_, below := svgchart.EstimatedTextExtents(text.fontSize)
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if margin := float64(height) - (text.y + below); margin < occultationChartBottomMarginMinimum {
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violations = append(violations, fmt.Sprintf("%q 距底边 %.2f px（下限 %.1f）", text.value, margin, occultationChartBottomMarginMinimum))
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}
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}
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return violations
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}
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func TestOccultationChartsKeepBottomMargin(t *testing.T) {
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long := footerFitLongText("margin ")
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starPath := occultationTestStarPath(t)
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planetPath := occultationTestSaturnPath(t)
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cases := []struct {
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name string
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height int
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document string
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}{}
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add := func(name string, height int, document string, err error) {
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if err != nil {
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t.Fatalf("%s: %v", name, err)
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}
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cases = append(cases, struct {
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name string
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height int
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document string
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}{name, height, document})
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}
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for _, size := range [][2]int{{640, 480}, {920, 720}} {
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options := footerFitStarTexts(long)
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options.Width, options.Height = size[0], size[1]
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diagram, err := StarOccultationPathSVG(starPath, options)
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add(fmt.Sprintf("恒星全球 %dx%d", size[0], size[1]), size[1], diagram, err)
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planetOptions := PlanetOccultationSVGOptions(options)
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planetDiagram, err := PlanetOccultationPathSVG(planetPath, planetOptions)
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add(fmt.Sprintf("行星全球 %dx%d", size[0], size[1]), size[1], planetDiagram, err)
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}
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local, err := LocalStarOccultationSVG(localHR4799Occultation(t), hr4799StarCoordinate(), LocalStarOccultationSVGOptions{
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Width: 640, Height: 520, Title: long, DirectionText: long, FooterNote: long,
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})
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add("站心恒星", 520, local, err)
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localPlanet, err := LocalPlanetOccultationSVG(localSaturnOccultation(t), LocalPlanetOccultationSVGOptions{
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Width: 760, Height: 600, Title: long, DirectionText: long, FooterNote: long,
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})
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add("站心行星", 600, localPlanet, err)
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detailed, err := StarOccultationDetailedSVG(starPath, hr4799StarCoordinate(), OccultationDetailedSVGOptions{
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Width: 700, Height: 990, Title: long, FooterNote: long,
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})
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add("恒星详图", 990, detailed, err)
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for _, tc := range cases {
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if violations := occultationBottomMarginViolations(t, tc.document, tc.height); len(violations) > 0 {
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t.Errorf("%s：%d 行文字贴到画布底边，首条 %s", tc.name, len(violations), violations[0])
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}
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}
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}
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// 页脚时标声明契约：超长自定义说明可以吃掉说明文字，但不能吃掉时标声明。
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func TestOccultationChartsKeepTimeScaleDeclaration(t *testing.T) {
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long := footerFitLongText("scale ")
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cst := time.FixedZone("CST", 8*3600)
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starPath := occultationTestStarPath(t)
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planetPath := occultationTestSaturnPath(t)
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options := footerFitStarTexts(long)
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options.Width, options.Height = 920, 720
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options.Location = cst
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global, err := StarOccultationPathSVG(starPath, options)
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if err != nil {
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t.Fatalf("恒星全球：%v", err)
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}
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planetOptions := PlanetOccultationSVGOptions(options)
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planet, err := PlanetOccultationPathSVG(planetPath, planetOptions)
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if err != nil {
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t.Fatalf("行星全球：%v", err)
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}
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local, err := LocalStarOccultationSVG(localHR4799Occultation(t), hr4799StarCoordinate(), LocalStarOccultationSVGOptions{
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Width: 920, Height: 720, Location: cst, FooterNote: long,
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})
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if err != nil {
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t.Fatalf("站心恒星：%v", err)
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}
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for name, document := range map[string]string{"恒星全球": global, "行星全球": planet, "站心恒星": local} {
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if !strings.Contains(document, "显示时区") && !strings.Contains(document, "图中时刻为 UTC") {
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t.Errorf("%s：超长说明把时标声明挤掉了", name)
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}
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}
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}
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