first version in go

go/glicko2_test.go

@@ -0,0 +1,47 @@
+package glicko2
+
+import (
+	"testing"
+	"math"
+)
+
+func inRange(want float64, have float64, delta float64) bool {
+	return math.Abs(want-have) <= delta
+}
+
+func TestGlicko2(t *testing.T) {
+	a := NewGlicko2(1500.0, 200.0, 0.06)
+	b := NewGlicko2(1400.0,  30.0, 0.06)
+	c := NewGlicko2(1550.0, 100.0, 0.06)
+	d := NewGlicko2(1700.0, 300.0, 0.06)
+
+	a.AddWin(b)
+	a.AddLoss(c)
+	a.AddLoss(d)
+
+	if a.Rating() != 1500.0 {
+		t.Error()
+	}
+	if a.Deviation() != 200.0 {
+		t.Error()
+	}
+
+	a.Update()
+
+	if !inRange(a.Rating(),1464.05,0.01) {
+		t.Error()
+	}
+	if !inRange(a.Deviation(),151.516,0.01) {
+		t.Error()
+	}
+
+	a.Update()
+
+	if !inRange(a.Rating(),1464.05,0.01) {
+		t.Error()
+	}
+	if !inRange(a.Deviation(),151.875,0.01) {
+		t.Error()
+	}
+
+}