RC-1

internal/core/core_test.go

@@ -0,0 +1,29 @@
+package core
+
+import (
+	"math/big"
+	"testing"
+)
+
+func TestExpectedGuessDeterministic(t *testing.T) {
+	a := ExpectedGuess("task_x", "seed", "client", 7, 28)
+	b := ExpectedGuess("task_x", "seed", "client", 7, 28)
+	if a != b {
+		t.Fatalf("not deterministic: %s != %s", a, b)
+	}
+	n, ok := new(big.Int).SetString(a, 10)
+	if !ok || n.Sign() < 0 || n.BitLen() > 28 {
+		t.Fatalf("guess outside range: %s", a)
+	}
+}
+
+func TestScore(t *testing.T) {
+	if Score(big.NewInt(0), 32) != 100 {
+		t.Fatal("exact hit must score 100")
+	}
+	near := Score(big.NewInt(1), 32)
+	far := Score(new(big.Int).Lsh(big.NewInt(1), 30), 32)
+	if near <= far {
+		t.Fatalf("near score %f should exceed far %f", near, far)
+	}
+}