88 lines
3.0 KiB
Go
88 lines
3.0 KiB
Go
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package svg
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import (
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"testing"
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"time"
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)
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// 本文件量化三族地图标签（等时线、中心线时刻、事件标记）的互相避让：
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// 产物里任一族的 <text> 占位都不许与另一族相交。
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type occultationLabelFixture struct {
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name string
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width int
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height int
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// labelStep 为 0 时用默认 30 分钟。
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labelStep time.Duration
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star bool
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}
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func TestOccultationMapLabelsDoNotOverlap(t *testing.T) {
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fixtures := []occultationLabelFixture{
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{name: "stellar 1200x800", width: 1200, height: 800, labelStep: 10 * time.Minute, star: true},
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{name: "stellar 720x520", width: 720, height: 520, labelStep: 15 * time.Minute, star: true},
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{name: "stellar 640x480", width: 640, height: 480, star: true},
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{name: "planetary compact 1200x800", width: 1200, height: 800, labelStep: 10 * time.Minute},
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{name: "planetary compact 720x520", width: 720, height: 520, labelStep: 15 * time.Minute},
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}
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totalLabels := 0
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for _, fixture := range fixtures {
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fixture := fixture
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t.Run(fixture.name, func(t *testing.T) {
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options := StarOccultationSVGOptions{
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Width: fixture.width, Height: fixture.height, Location: time.UTC, TimeLabelStep: fixture.labelStep,
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}
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var diagram string
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var err error
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if fixture.star {
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diagram, err = StarOccultationPathSVG(occultationTestStarPath(t), options)
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} else {
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diagram, err = PlanetOccultationPathSVG(occultationTestSaturnPath(t), options)
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}
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if err != nil {
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t.Fatalf("render: %v", err)
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}
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labels := occultationSVGLabelTexts(occultationSVGTexts(t, diagram))
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if len(labels) < 3 {
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t.Fatalf("fixture produced only %d labels; the overlap check would be vacuous", len(labels))
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}
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if outside := occultationSVGTextsOutsideCanvas(labels, float64(fixture.width), float64(fixture.height)); len(outside) > 0 {
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t.Fatalf("map labels outside the canvas: %v", outside)
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}
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if pairs := occultationSVGTextOverlapPairs(labels); pairs != 0 {
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t.Fatalf("%d label overlap pairs among %d labels", pairs, len(labels))
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}
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totalLabels += len(labels)
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})
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}
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if totalLabels < 40 {
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t.Fatalf("label fixtures only produced %d labels, want a dense label set", totalLabels)
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}
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t.Logf("checked %d labels across %d fixtures", totalLabels, len(fixtures))
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}
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func TestPlanetOccultationMapLabelsAvoidTotalBandMarkers(t *testing.T) {
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diagram, err := PlanetOccultationPathSVG(occultationTestMarsPath(t), StarOccultationSVGOptions{
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Width: 1200, Height: 800, Location: time.UTC, TimeLabelStep: 10 * time.Minute,
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})
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if err != nil {
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t.Fatalf("render: %v", err)
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}
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labels := occultationSVGLabelTexts(occultationSVGTexts(t, diagram))
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if len(labels) < 5 {
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t.Fatalf("total-band fixture produced only %d labels", len(labels))
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}
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if pairs := occultationSVGTextOverlapPairs(labels); pairs != 0 {
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t.Fatalf("%d label overlap pairs among %d labels", pairs, len(labels))
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}
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markers := 0
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for _, label := range labels {
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if label.parentClass == "event-marker event-greatest" {
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markers++
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}
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}
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if markers != 1 {
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t.Fatalf("greatest-event label count = %d, want one", markers)
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}
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}
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