starainrt
3ffdbe0034
- 新增日食、月食、本地可见性、中心线、半影区域、SVG 图示与沙罗周期信息 - 新增行星冲合、留、方照、物理星历、视直径、相位、亮肢角、轨道节点等计算 - 新增木星伽利略卫星位置、现象与接触事件计算 - 新增恒星星表、星座判定、自行修正与观测辅助能力 - 新增 coord、formula、orbit、sundial、lite/sun、lite/moon 等扩展包 - 完善农历年号、月相英文别名、视差角、大气质量、折射、日晷与双星计算 - 增加 NASA、JPL Horizons、IMCCE 等回归测试数据与基线测试 - 重构基础算法文件组织，补充大量公开 API 注释和语义回归测试 - 更新中文和英文 README，补充示例、精度说明、SVG 配图
78 lines
2.6 KiB
Go
78 lines
2.6 KiB
Go
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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func TestOrbitalNodesDescendingOpposesAscending(t *testing.T) {
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jde := 2461157.5
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testCases := []struct {
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name string
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ascending func(float64) float64
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descending func(float64) float64
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}{
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{name: "moon", ascending: MoonAscendingNode, descending: MoonDescendingNode},
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{name: "mercury", ascending: MercuryAscendingNode, descending: MercuryDescendingNode},
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{name: "venus", ascending: VenusAscendingNode, descending: VenusDescendingNode},
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{name: "mars", ascending: MarsAscendingNode, descending: MarsDescendingNode},
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{name: "jupiter", ascending: JupiterAscendingNode, descending: JupiterDescendingNode},
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{name: "saturn", ascending: SaturnAscendingNode, descending: SaturnDescendingNode},
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{name: "uranus", ascending: UranusAscendingNode, descending: UranusDescendingNode},
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{name: "neptune", ascending: NeptuneAscendingNode, descending: NeptuneDescendingNode},
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}
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for _, tc := range testCases {
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t.Run(tc.name, func(t *testing.T) {
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ascending := tc.ascending(jde)
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descending := tc.descending(jde)
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want := ascending + 180
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if want >= 360 {
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want -= 360
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}
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if diff := angularDifference(descending, ascending+180); diff > 1e-10 {
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t.Fatalf("descending node mismatch: got %.12f want %.12f diff=%.12g", descending, want, diff)
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}
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})
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}
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}
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func TestOrbitalNodesNFullMatchesDefault(t *testing.T) {
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jde := 2461157.5
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testCases := []struct {
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name string
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defaultFn func(float64) float64
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truncatedN func(float64, int) float64
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}{
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{name: "moon", defaultFn: MoonAscendingNode, truncatedN: MoonAscendingNodeN},
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{name: "mercury", defaultFn: MercuryAscendingNode, truncatedN: MercuryAscendingNodeN},
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{name: "venus", defaultFn: VenusAscendingNode, truncatedN: VenusAscendingNodeN},
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{name: "mars", defaultFn: MarsAscendingNode, truncatedN: MarsAscendingNodeN},
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{name: "jupiter", defaultFn: JupiterAscendingNode, truncatedN: JupiterAscendingNodeN},
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{name: "saturn", defaultFn: SaturnAscendingNode, truncatedN: SaturnAscendingNodeN},
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{name: "uranus", defaultFn: UranusAscendingNode, truncatedN: UranusAscendingNodeN},
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{name: "neptune", defaultFn: NeptuneAscendingNode, truncatedN: NeptuneAscendingNodeN},
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}
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for _, tc := range testCases {
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t.Run(tc.name, func(t *testing.T) {
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got := tc.defaultFn(jde)
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gotN := tc.truncatedN(jde, -1)
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if diff := angularDifference(got, gotN); diff > 1e-10 {
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t.Fatalf("full-series N mismatch: got %.12f want %.12f diff=%.12g", gotN, got, diff)
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}
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})
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}
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}
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func angularDifference(a, b float64) float64 {
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diff := math.Mod(a-b, 360)
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if diff < -180 {
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diff += 360
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}
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if diff > 180 {
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diff -= 360
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}
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return math.Abs(diff)
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}
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