b612
044f2f4381
- 新增半解析、旧模型、自定义与多源堆叠星历实例，提供 Context、Instance、SPK 读取及状态与视位置计算 - 统一太阳、月球和行星实例接口，扩展黄经穿越、留、相位、最近角距、偕日可见、任意高度升落、轨道节点及凌日等天象查询 - 完善日月食、月掩与凌日的月缘剖面、有限盘面接触、站心修正、局地可见性、全球路径和地图输出 - 新增 SVG、GeoJSON、KML 天象输出及凌日、月掩和月缘地形相关缓存与几何求解 - 新增恒星星表导入与查询，支持 CSV、Hipparcos、BSC5、Stellarium 等格式及名称、交叉标识、锥面检索和星等过滤 - 补充 IAU 2006、地球定向、折射消光、大气观测、轨道传播及半解析行星/月球数据支持 - 将默认未来民用时标切换为 TimeScaleLeapHour，更新 2027–2400 农历速查表、中文日期解析和时区边界处理 - 增加事件基线、跨模型回归、几何边界、月缘地形和输出契约测试，完善中英文手册、示例资源、NOTICE 与忽略规则
100 lines
4.7 KiB
Go
100 lines
4.7 KiB
Go
package basic
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import (
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"fmt"
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"math"
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"testing"
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"b612.me/astro/internal/ephem"
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)
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func TestSaturnRingParametersMeeusExample(t *testing.T) {
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earthLatitude, sunLatitude, positionAngle, deltaU, majorAxis, minorAxis := SaturnRingParameters(2448972.50068)
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assertClose(t, "EarthLatitude", earthLatitude, 16.4415, 0.0001)
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assertClose(t, "SunLatitude", sunLatitude, 14.6782, 0.0001)
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assertClose(t, "PositionAngle", positionAngle, 6.7406, 0.0001)
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assertClose(t, "DeltaU", deltaU, 4.1991, 0.0001)
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assertClose(t, "MajorAxis", majorAxis, 35.8687, 0.0001)
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assertClose(t, "MinorAxis", minorAxis, 10.1521, 0.0001)
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}
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func TestSaturnRingNFullMatchesDefault(t *testing.T) {
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jd := 2448972.50068
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defaultEarthLatitude, defaultSunLatitude, defaultPositionAngle, defaultDeltaU, defaultMajorAxis, defaultMinorAxis := SaturnRingParameters(jd)
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truncatedEarthLatitude, truncatedSunLatitude, truncatedPositionAngle, truncatedDeltaU, truncatedMajorAxis, truncatedMinorAxis := SaturnRingParametersN(jd, -1)
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assertSameFloat(t, "EarthLatitude", defaultEarthLatitude, truncatedEarthLatitude)
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assertSameFloat(t, "SunLatitude", defaultSunLatitude, truncatedSunLatitude)
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assertSameFloat(t, "PositionAngle", defaultPositionAngle, truncatedPositionAngle)
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assertSameFloat(t, "DeltaU", defaultDeltaU, truncatedDeltaU)
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assertSameFloat(t, "MajorAxis", defaultMajorAxis, truncatedMajorAxis)
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assertSameFloat(t, "MinorAxis", defaultMinorAxis, truncatedMinorAxis)
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assertSameFloat(t, "SaturnRingB", SaturnRingB(jd), SaturnRingBN(jd, -1))
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assertSameFloat(t, "SaturnRingSunB", SaturnRingSunB(jd), SaturnRingSunBN(jd, -1))
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assertSameFloat(t, "SaturnRingPositionAngle", SaturnRingPositionAngle(jd), SaturnRingPositionAngleN(jd, -1))
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assertSameFloat(t, "SaturnRingDeltaU", SaturnRingDeltaU(jd), SaturnRingDeltaUN(jd, -1))
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}
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func TestSaturnRingParametersNWithInstanceForwardsN(t *testing.T) {
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previous := ephem.Active()
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t.Cleanup(func() { ephem.SetActive(previous) })
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jd := 2458850.5
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names := []string{"EarthLatitude", "SunLatitude", "PositionAngle", "DeltaU", "MajorAxis", "MinorAxis"}
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for _, model := range []ephem.Model{ephem.Legacy, ephem.Semianalytic} {
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ephem.SetActive(model)
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inst := ephem.NewModelInstance(model)
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for _, n := range []int{-1, 0} {
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expectedEarthLatitude, expectedSunLatitude, expectedPositionAngle, expectedDeltaU, expectedMajorAxis, expectedMinorAxis := SaturnRingParametersN(jd, n)
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gotEarthLatitude, gotSunLatitude, gotPositionAngle, gotDeltaU, gotMajorAxis, gotMinorAxis := SaturnRingParametersNWithInstance(jd, n, inst)
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got := []float64{gotEarthLatitude, gotSunLatitude, gotPositionAngle, gotDeltaU, gotMajorAxis, gotMinorAxis}
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expected := []float64{expectedEarthLatitude, expectedSunLatitude, expectedPositionAngle, expectedDeltaU, expectedMajorAxis, expectedMinorAxis}
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for index := range names {
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assertClose(t, fmt.Sprintf("model=%d n=%d %s", model, n, names[index]), got[index], expected[index], 1e-10)
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}
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}
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}
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}
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func TestSaturnRingParametersNWithInstanceIsolatedFromGlobalModel(t *testing.T) {
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previous := ephem.Active()
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t.Cleanup(func() { ephem.SetActive(previous) })
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jd := 2458850.5
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names := []string{"EarthLatitude", "SunLatitude", "PositionAngle", "DeltaU", "MajorAxis", "MinorAxis"}
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for _, testCase := range []struct {
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globalModel ephem.Model
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instanceModel ephem.Model
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}{
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{globalModel: ephem.Legacy, instanceModel: ephem.Semianalytic},
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{globalModel: ephem.Semianalytic, instanceModel: ephem.Legacy},
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} {
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inst := ephem.NewModelInstance(testCase.instanceModel)
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for _, n := range []int{-1, 0} {
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ephem.SetActive(testCase.instanceModel)
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expectedEarthLatitude, expectedSunLatitude, expectedPositionAngle, expectedDeltaU, expectedMajorAxis, expectedMinorAxis := SaturnRingParametersN(jd, n)
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ephem.SetActive(testCase.globalModel)
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gotEarthLatitude, gotSunLatitude, gotPositionAngle, gotDeltaU, gotMajorAxis, gotMinorAxis := SaturnRingParametersNWithInstance(jd, n, inst)
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got := []float64{gotEarthLatitude, gotSunLatitude, gotPositionAngle, gotDeltaU, gotMajorAxis, gotMinorAxis}
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expected := []float64{expectedEarthLatitude, expectedSunLatitude, expectedPositionAngle, expectedDeltaU, expectedMajorAxis, expectedMinorAxis}
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for index := range names {
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assertClose(t, fmt.Sprintf("global=%d instance=%d n=%d %s", testCase.globalModel, testCase.instanceModel, n, names[index]), got[index], expected[index], 1e-10)
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}
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}
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}
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}
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func assertClose(t *testing.T, name string, got, want, tolerance float64) {
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t.Helper()
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if math.Abs(got-want) > tolerance {
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t.Fatalf("%s mismatch: got %.12f want %.12f tolerance %.12f", name, got, want, tolerance)
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}
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}
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func assertSameFloat(t *testing.T, name string, got, want float64) {
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t.Helper()
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if math.Float64bits(got) != math.Float64bits(want) {
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t.Fatalf("%s full-n mismatch: got %.18f want %.18f", name, got, want)
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}
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}
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