48 lines
1.8 KiB
Go
48 lines
1.8 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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// 偏食足迹扫描的密步长请求被夹到两分钟：并集需要一整条自洽的扫描序列，
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// 更密的扫描成倍放大成本却不改产物，事后抽稀又会破坏并集的覆盖面判定。
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func TestSolarEclipseMapPartialStepUsesDefaultSweep(t *testing.T) {
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date := time.Date(2024, time.April, 8, 0, 0, 0, 0, time.UTC)
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for _, test := range []struct {
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requested time.Duration
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want time.Duration
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}{
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{requested: 0, want: 2 * time.Minute},
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{requested: -time.Minute, want: 2 * time.Minute},
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{requested: time.Second, want: 2 * time.Minute},
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{requested: 10 * time.Second, want: 2 * time.Minute},
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{requested: time.Minute, want: 2 * time.Minute},
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{requested: 119 * time.Second, want: 2 * time.Minute},
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{requested: 2 * time.Minute, want: 2 * time.Minute},
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{requested: 3 * time.Minute, want: 3 * time.Minute},
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{requested: 10 * time.Minute, want: 10 * time.Minute},
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} {
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got := normalizeSolarEclipseMapSVGOptions(date, SolarEclipseMapSVGOptions{
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PartialStep: test.requested,
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}).PartialStep
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if got != test.want {
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t.Fatalf("PartialStep %s normalized to %s, want %s", test.requested, got, test.want)
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}
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}
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// 一秒请求与默认两分钟请求必须逐字节相同，代价也回到默认量级。
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fast, fastOK := SolarEclipseMapSVG(date, SolarEclipseMapSVGOptions{
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Width: 900, Height: 620, Location: time.UTC, PartialStep: time.Second,
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})
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defaulted, defaultOK := SolarEclipseMapSVG(date, SolarEclipseMapSVGOptions{
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Width: 900, Height: 620, Location: time.UTC, PartialStep: 2 * time.Minute,
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})
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if !fastOK || !defaultOK {
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t.Fatal("missing 2024-04-08 map")
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}
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if fast != defaulted {
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t.Fatalf("a one-second sweep request changed the rendered document (%d vs %d bytes)", len(fast), len(defaulted))
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}
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}
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