added minimal test for my decay store thing

epsilon_decay_test.go

@@ -0,0 +1,13 @@
+package hostpool
+
+import (
+	"github.com/bmizerany/assert"
+	"log"
+	"testing"
+)
+
+func TestEDS(t *testing.T) {
+	eds := NewDecayStore()
+	eds.Record(1.5)
+	assert.Equal(t, eds.GetWeightedAvgScore(), 1.5)
+}