b612
2bf8478639
- 新增日月食中心带、偏食带、阴影足迹、等时线、食分线及升落边界计算，支持极区与混合食拓扑 - 新增日食单时刻阴影求解器、站心状态查询、批量采样和 ΔT 覆盖接口 - 重构恒星与行星月掩路径，补充有限盘面接触、站心修正、掩带宽度、极区投影及升落边界 - 扩展 SVG 与 GeoJSON 输出，支持详细面板、全球/极区/地球投影、边界闭合、时间标记和拓扑签名 - 扩展日月食候选搜索、局地搜索、沙罗序列预计算与范围外推，补充系列锚点和成员一致性校验 - 补齐古历纪年、儒略历独有闰日、多公历候选、历法改革跨日及精确日期运算接口 - 优化 ΔT、章动、恒星时、月球地平线、事件根搜索和本地星历缓存，降低重复计算开销并提升边界稳定
109 lines
3.8 KiB
Go
109 lines
3.8 KiB
Go
package svgchart
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import (
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"strings"
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"testing"
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)
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// 折行与截断必须与 EstimatedTextWidth/EstimatedTextExtents 同口径：留下的每一行都不超宽，
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// 截断后的行数不超过高度预算，且末行以省略号结尾。
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func textFits(t *testing.T, lines []string, maxWidth, fontSize float64) {
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t.Helper()
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for _, line := range lines {
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if width := EstimatedTextWidth(line, fontSize); width > maxWidth {
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t.Fatalf("line %q width %.1f exceeds %.1f", line, width, maxWidth)
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}
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}
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}
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func TestWrapTextKeepsEveryLineInsideWidth(t *testing.T) {
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for _, test := range []struct {
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name string
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value string
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maxWidth float64
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fontSize float64
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}{
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{name: "ascii words", value: strings.Repeat("alpha beta gamma ", 20), maxWidth: 220, fontSize: 11},
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{name: "chinese runs", value: strings.Repeat("月球掩星示意图说明", 30), maxWidth: 180, fontSize: 11},
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{name: "mixed", value: strings.Repeat("掩星 occultation 说明；", 40), maxWidth: 260, fontSize: 9},
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{name: "single word", value: strings.Repeat("A", 200), maxWidth: 120, fontSize: 10},
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} {
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t.Run(test.name, func(t *testing.T) {
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lines := WrapText(test.value, test.maxWidth, test.fontSize)
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if len(lines) < 2 {
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t.Fatalf("lines = %d, want the text to be wrapped", len(lines))
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}
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textFits(t, lines, test.maxWidth, test.fontSize)
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})
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}
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}
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func TestWrapTextKeepsShortTextOnOneLine(t *testing.T) {
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lines := WrapText(" 短说明 short note ", 400, 11)
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if len(lines) != 1 || lines[0] != "短说明 short note" {
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t.Fatalf("lines = %#v, want one trimmed line", lines)
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}
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if lines := WrapText(" ", 400, 11); lines != nil {
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t.Fatalf("blank text lines = %#v, want nil", lines)
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}
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}
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func TestTruncateTextLinesMarksTheCut(t *testing.T) {
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lines := []string{"第一行", "第二行", "第三行", "第四行"}
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kept := TruncateTextLines(lines, 400, 11, 2)
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if len(kept) != 2 || kept[0] != "第一行" {
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t.Fatalf("kept = %#v, want the first two lines", kept)
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}
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if !strings.HasSuffix(kept[1], ellipsisMark) {
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t.Fatalf("last kept line = %q, want the ellipsis mark", kept[1])
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}
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if kept := TruncateTextLines(lines, 400, 11, 9); len(kept) != 4 || kept[3] != "第四行" {
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t.Fatalf("kept = %#v, want the untouched input", kept)
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}
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}
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func TestTruncateTextLinesEllipsizesTheLastLineToWidth(t *testing.T) {
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lines := []string{strings.Repeat("宽", 20), strings.Repeat("宽", 20)}
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kept := TruncateTextLines(lines, 60, 10, 1)
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if len(kept) != 1 || !strings.HasSuffix(kept[0], ellipsisMark) {
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t.Fatalf("kept = %#v, want one ellipsized line", kept)
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}
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textFits(t, kept, 60, 10)
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}
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func TestTextLineLimitCountsExtents(t *testing.T) {
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// 3 行 11 号字、行距 15 的总高约 42.65，预算再少一点就只放得下 2 行。
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if limit := TextLineLimit(11, 15, 42.7); limit != 3 {
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t.Fatalf("limit = %d, want 3", limit)
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}
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if limit := TextLineLimit(11, 15, 42.6); limit != 2 {
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t.Fatalf("limit = %d, want 2", limit)
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}
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if limit := TextLineLimit(11, 15, 1); limit != 1 {
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t.Fatalf("limit = %d, want the one-line floor", limit)
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}
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// 基线口径：首行基线 100，第 2 行要排得下需要底线不低于 100+15+0.3*11。
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if limit := BaselineLineLimit(11, 15, 100, 118.4); limit != 2 {
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t.Fatalf("limit = %d, want 2", limit)
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}
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if limit := BaselineLineLimit(11, 15, 100, 118.2); limit != 1 {
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t.Fatalf("limit = %d, want 1", limit)
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}
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}
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func TestEllipsizeTextStaysInsideWidth(t *testing.T) {
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value := strings.Repeat("长文本 ellipsis ", 30)
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clamped := EllipsizeText(value, 150, 11)
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if !strings.HasSuffix(clamped, ellipsisMark) {
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t.Fatalf("clamped = %q, want the ellipsis mark", clamped)
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}
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textFits(t, []string{clamped}, 150, 11)
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if short := EllipsizeText("短", 150, 11); short != "短" {
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t.Fatalf("short text = %q, want it untouched", short)
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}
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if empty := EllipsizeText(value, 1, 11); empty != "" {
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t.Fatalf("clamped = %q, want an empty string when even the mark does not fit", empty)
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}
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}
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