83 lines
3.2 KiB
Go
83 lines
3.2 KiB
Go
|
package moon
|
||
|
|
|
||
|
|
import (
|
||
|
|
"math"
|
||
|
|
"testing"
|
||
|
|
"time"
|
||
|
|
|
||
|
|
"b612.me/astro/basic"
|
||
|
|
)
|
||
|
|
|
||
|
|
func TestConjunctionPlanetWrappersMatchBasic(t *testing.T) {
|
||
|
|
loc := time.FixedZone("CST", 8*3600)
|
||
|
|
query := time.Date(2026, 1, 15, 20, 0, 0, 0, loc)
|
||
|
|
queryTT := basic.TD2UT(basic.Date2JDE(query.UTC()), true)
|
||
|
|
|
||
|
|
cases := []struct {
|
||
|
|
name string
|
||
|
|
planet ConjunctionPlanet
|
||
|
|
basic basic.MoonPlanetConjunctionPlanet
|
||
|
|
}{
|
||
|
|
{name: "Mercury", planet: ConjunctionMercury, basic: basic.MoonPlanetConjunctionMercury},
|
||
|
|
{name: "Venus", planet: ConjunctionVenus, basic: basic.MoonPlanetConjunctionVenus},
|
||
|
|
{name: "Mars", planet: ConjunctionMars, basic: basic.MoonPlanetConjunctionMars},
|
||
|
|
{name: "Jupiter", planet: ConjunctionJupiter, basic: basic.MoonPlanetConjunctionJupiter},
|
||
|
|
{name: "Saturn", planet: ConjunctionSaturn, basic: basic.MoonPlanetConjunctionSaturn},
|
||
|
|
{name: "Uranus", planet: ConjunctionUranus, basic: basic.MoonPlanetConjunctionUranus},
|
||
|
|
{name: "Neptune", planet: ConjunctionNeptune, basic: basic.MoonPlanetConjunctionNeptune},
|
||
|
|
}
|
||
|
|
|
||
|
|
for _, tc := range cases {
|
||
|
|
t.Run(tc.name, func(t *testing.T) {
|
||
|
|
assertSameConjunctionTime(t, "last", LastConjunctionWithPlanet(query, tc.planet), basic.LastMoonPlanetConjunction(queryTT, tc.basic), loc)
|
||
|
|
assertSameConjunctionTime(t, "next", NextConjunctionWithPlanet(query, tc.planet), basic.NextMoonPlanetConjunction(queryTT, tc.basic), loc)
|
||
|
|
assertSameConjunctionTime(t, "closest", ClosestConjunctionWithPlanet(query, tc.planet), basic.ClosestMoonPlanetConjunction(queryTT, tc.basic), loc)
|
||
|
|
})
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func assertSameConjunctionTime(t *testing.T, name string, got time.Time, wantJDE float64, loc *time.Location) {
|
||
|
|
t.Helper()
|
||
|
|
want := basic.JDE2DateByZone(wantJDE, loc, false)
|
||
|
|
if got.Location() != loc {
|
||
|
|
t.Fatalf("%s location mismatch: got %q want %q", name, got.Location().String(), loc.String())
|
||
|
|
}
|
||
|
|
if !got.Equal(want) {
|
||
|
|
t.Fatalf("%s time mismatch: got %s want %s", name, got.Format(time.RFC3339Nano), want.Format(time.RFC3339Nano))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestClosestConjunctionReturnsNearestCandidate(t *testing.T) {
|
||
|
|
query := time.Date(2026, 1, 15, 12, 0, 0, 0, time.UTC)
|
||
|
|
last := LastConjunctionWithPlanet(query, ConjunctionMercury)
|
||
|
|
next := NextConjunctionWithPlanet(query, ConjunctionMercury)
|
||
|
|
got := ClosestConjunctionWithPlanet(query, ConjunctionMercury)
|
||
|
|
|
||
|
|
lastDiff := math.Abs(query.Sub(last).Seconds())
|
||
|
|
nextDiff := math.Abs(next.Sub(query).Seconds())
|
||
|
|
if lastDiff <= nextDiff {
|
||
|
|
if !got.Equal(last) {
|
||
|
|
t.Fatalf("closest should match last: got %s want %s", got.Format(time.RFC3339Nano), last.Format(time.RFC3339Nano))
|
||
|
|
}
|
||
|
|
return
|
||
|
|
}
|
||
|
|
if !got.Equal(next) {
|
||
|
|
t.Fatalf("closest should match next: got %s want %s", got.Format(time.RFC3339Nano), next.Format(time.RFC3339Nano))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestInvalidConjunctionPlanetReturnsZeroTime(t *testing.T) {
|
||
|
|
query := time.Date(2026, 1, 15, 12, 0, 0, 0, time.FixedZone("CST", 8*3600))
|
||
|
|
invalid := ConjunctionPlanet("pluto")
|
||
|
|
|
||
|
|
for name, fn := range map[string]func(time.Time, ConjunctionPlanet) time.Time{
|
||
|
|
"last": LastConjunctionWithPlanet,
|
||
|
|
"next": NextConjunctionWithPlanet,
|
||
|
|
"closest": ClosestConjunctionWithPlanet,
|
||
|
|
} {
|
||
|
|
if got := fn(query, invalid); !got.IsZero() {
|
||
|
|
t.Fatalf("%s should return zero time for invalid planet, got %s", name, got.Format(time.RFC3339Nano))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|