36 lines
1.1 KiB
Go
36 lines
1.1 KiB
Go
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package basic
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import (
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"math"
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"testing"
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)
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// GetJieqiLoops 的黄经必须归化到 (0,360]：loop>31 时旧实现把 >360° 的角度直接交给 GetJQTime，
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// 那里 Newton 迭代静默失败，返回 9 个 NaN；loop<=0 旧实现还会 makeslice panic。
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func TestGetJieqiLoopsNormalizesAngleAndGuardsLoop(t *testing.T) {
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short := GetJieqiLoops(2024, 25)
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long := GetJieqiLoops(2024, 40)
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if len(long) != 40 {
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t.Fatalf("loop=40 length = %d", len(long))
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}
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for index, value := range long {
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if math.IsNaN(value) || math.IsInf(value, 0) {
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t.Fatalf("loop=40 index %d is not finite: %v", index, value)
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}
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if index > 0 && value <= long[index-1] {
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t.Fatalf("loop=40 index %d is not increasing: %v <= %v", index, value, long[index-1])
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}
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}
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for index := range short {
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if math.Float64bits(short[index]) != math.Float64bits(long[index]) {
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t.Fatalf("loop=25 index %d changed when loop grows: %v vs %v", index, short[index], long[index])
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}
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}
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if got := GetJieqiLoops(2024, 0); got != nil {
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t.Fatalf("loop=0 = %v, want nil", got)
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}
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if got := GetJieqiLoops(2024, -3); got != nil {
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t.Fatalf("negative loop = %v, want nil (no panic)", got)
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}
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}
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