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feat: add ranked season rollover policy

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This commit is contained in:
Josh Creek
2026-08-31 20:29:11 +01:00
parent 1793eb7621
commit cc2cd80a01
16 changed files with 688 additions and 249 deletions
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server/domain/rating_test.go
+35 -11
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@@ -14,7 +14,9 @@ func TestUpdateRatingMatchesCanonicalGlicko2Example(t *testing.T) {
{PlayerID: "c", Rating: Rating{Value: 1700, RD: 300, Volatility: 0.06}, Score: 0, Weight: 1},
}
updated, err := UpdateRating(current, opponents, time.Unix(100000, 0))
if err != nil { t.Fatal(err) }
if err != nil {
t.Fatal(err)
}
if math.Abs(updated.Value-1464.06) > 0.1 || math.Abs(updated.RD-151.52) > 0.1 || math.Abs(updated.Volatility-0.05999) > 0.0001 {
t.Fatalf("canonical vector mismatch: %+v", updated)
}
@@ -24,26 +26,48 @@ func TestRatingInactivityRaisesRDWithoutChangingRating(t *testing.T) {
now := time.Unix(100000, 0)
current := Rating{Value: 1600, RD: 100, Volatility: 0.06, LastRatedAt: now}
updated, err := UpdateRating(current, nil, now.Add(48*time.Hour+time.Hour))
if err != nil { t.Fatal(err) }
if updated.Value != current.Value || updated.RD <= current.RD || updated.RD > GlickoInitialRD { t.Fatalf("bad inactivity update: %+v", updated) }
if err != nil {
t.Fatal(err)
}
if updated.Value != current.Value || updated.RD <= current.RD || updated.RD > GlickoInitialRD {
t.Fatalf("bad inactivity update: %+v", updated)
}
}
func TestOpponentWeightHelpersAreExactAndDeterministic(t *testing.T) {
opponents := []Opponent{{PlayerID: "c", Rating: Rating{Value: 1700}}, {PlayerID: "a", Rating: Rating{Value: 1400}}, {PlayerID: "b", Rating: Rating{Value: 1550}}}
ranked, err := RankedOpponents(opponents)
if err != nil { t.Fatal(err) }
if ranked[0].PlayerID != "a" || ranked[0].Weight != 1.0/3.0 { t.Fatalf("ranked weighting/order wrong: %+v", ranked) }
if err != nil {
t.Fatal(err)
}
if ranked[0].PlayerID != "a" || ranked[0].Weight != 1.0/3.0 {
t.Fatalf("ranked weighting/order wrong: %+v", ranked)
}
reordered, err := RankedOpponents([]Opponent{opponents[1], opponents[0], opponents[2]})
if err != nil { t.Fatal(err) }
for i := range ranked { if ranked[i].PlayerID != reordered[i].PlayerID { t.Fatal("input order changed opponent order") } }
if err != nil {
t.Fatal(err)
}
for i := range ranked {
if ranked[i].PlayerID != reordered[i].PlayerID {
t.Fatal("input order changed opponent order")
}
}
casual, err := CasualOpponents(opponents[:2])
if err != nil { t.Fatal(err) }
if casual[0].Weight != 0.5 || casual[1].Weight != 0.5 { t.Fatalf("casual weighting wrong: %+v", casual) }
if err != nil {
t.Fatal(err)
}
if casual[0].Weight != 0.5 || casual[1].Weight != 0.5 {
t.Fatalf("casual weighting wrong: %+v", casual)
}
}
func TestRatingRejectsInvalidStateAndBadScore(t *testing.T) {
_, err := UpdateRating(Rating{Value: 1500, RD: 0, Volatility: 0.06}, nil, time.Now())
if err == nil { t.Fatal("accepted zero RD") }
if err == nil {
t.Fatal("accepted zero RD")
}
_, err = UpdateRating(Rating{Value: 1500, RD: 200, Volatility: 0.06}, []Opponent{{Rating: Rating{Value: 1500, RD: 100, Volatility: 0.06}, Weight: 1, Score: 2}}, time.Now())
if err == nil { t.Fatal("accepted score outside [0,1]") }
if err == nil {
t.Fatal("accepted score outside [0,1]")
}
}