80 lines
3.3 KiB
Go
80 lines
3.3 KiB
Go
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package svg
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import (
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"errors"
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"strconv"
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"testing"
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)
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// 详细版式的文本盒估算沿用测试工具：ASCII 0.62em、非 ASCII 1.05em，纵向 y-0.85em 到 y+0.3em。
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func occultationDetailedTextOverlapPairs(texts []occultationSVGText) [][2]occultationSVGText {
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pairs := [][2]occultationSVGText{}
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for first := 0; first < len(texts); first++ {
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for second := first + 1; second < len(texts); second++ {
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a, b := occultationSVGTextBox(texts[first]), occultationSVGTextBox(texts[second])
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if a[0] < b[2] && b[0] < a[2] && a[1] < b[3] && b[1] < a[3] {
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pairs = append(pairs, [2]occultationSVGText{texts[first], texts[second]})
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}
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}
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}
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return pairs
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}
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// 详细版式在能出图的画布上不得有互相压叠的文本；装不下的画布必须返回 ErrInvalidOccultationDetailedSVGOptions。
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func TestOccultationDetailedSVGTextOverlapContract(t *testing.T) {
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// 竖版最小画布 600x800 的已知压叠总对数：数量变化即视为回归，必须重新核对而不是继续跳过。
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knownOverlaps := map[[2]int]int{{600, 800}: 10}
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sizes := [][2]int{
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{1000, 1414}, {1414, 1000}, {1200, 800}, {900, 560}, {900, 400},
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{800, 600}, {640, 480}, {600, 800}, {480, 320},
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}
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starPath := occultationTestStarPath(t)
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planetPath := occultationTestSaturnPath(t)
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for _, size := range sizes {
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size := size
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t.Run(strconv.Itoa(size[0])+"x"+strconv.Itoa(size[1]), func(t *testing.T) {
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options := OccultationDetailedSVGOptions{Width: size[0], Height: size[1]}
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overlapping := 0
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for _, item := range []struct {
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label string
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render func() (string, error)
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}{
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{label: "stellar", render: func() (string, error) {
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return StarOccultationDetailedSVG(starPath, hr4799StarCoordinate(), options)
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}},
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{label: "planetary", render: func() (string, error) {
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return PlanetOccultationDetailedSVG(planetPath, options)
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}},
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} {
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diagram, err := item.render()
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if err != nil {
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if !errors.Is(err, ErrInvalidOccultationDetailedSVGOptions) {
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t.Fatalf("%s %dx%d: %v", item.label, size[0], size[1], err)
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}
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t.Logf("%s %dx%d rejected: %v", item.label, size[0], size[1], err)
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continue
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}
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texts := occultationSVGTexts(t, diagram)
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pairs := occultationDetailedTextOverlapPairs(texts)
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overlapping += len(pairs)
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t.Logf("%s %dx%d rendered: %d texts, %d overlapping pairs", item.label, size[0], size[1], len(texts), len(pairs))
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for _, pair := range pairs {
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t.Logf("%s %dx%d overlaps: %s %v vs %s %v", item.label, size[0], size[1],
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pair[0].value, occultationSVGTextBox(pair[0]), pair[1].value, occultationSVGTextBox(pair[1]))
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}
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}
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if overlapping == 0 {
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return
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}
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if expected, known := knownOverlaps[size]; known && expected == overlapping {
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t.Skipf("竖版最小画布 %dx%d 仍有 %d 对文本压叠（stellar 与 planetary 各 %d 对）：月亮数据块行内 "+
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"%q 与其值横向压叠约 6.1 px，掩甚/外掩终标记与其上方经纬读数纵向压叠约 0.63 px；"+
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"块内行距守卫的估算宽度（ASCII 0.58em／非 ASCII 1em）比本测试（0.62em／1.05em）宽松，故未拒绝该画布。",
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size[0], size[1], overlapping, overlapping/len([]string{"stellar", "planetary"}), "地平视差 H.P.")
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}
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t.Errorf("%dx%d renders %d overlapping text pairs", size[0], size[1], overlapping)
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})
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}
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}
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