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bulletproof/helpers_test.go

@@ -0,0 +1,85 @@
+package bulletproof
+
+import (
+	crand "crypto/rand"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/sonr-io/sonr/crypto/core/curves"
+)
+
+func TestInnerProductHappyPath(t *testing.T) {
+	curve := curves.ED25519()
+	a := randScalarVec(3, *curve)
+	b := randScalarVec(3, *curve)
+	_, err := innerProduct(a, b)
+	require.NoError(t, err)
+}
+
+func TestInnerProductMismatchedLengths(t *testing.T) {
+	curve := curves.ED25519()
+	a := randScalarVec(3, *curve)
+	b := randScalarVec(4, *curve)
+	_, err := innerProduct(a, b)
+	require.Error(t, err)
+}
+
+func TestInnerProductEmptyVector(t *testing.T) {
+	curve := curves.ED25519()
+	a := randScalarVec(0, *curve)
+	b := randScalarVec(0, *curve)
+	_, err := innerProduct(a, b)
+	require.Error(t, err)
+}
+
+func TestInnerProductOut(t *testing.T) {
+	curve := curves.ED25519()
+	a := randScalarVec(2, *curve)
+	b := randScalarVec(2, *curve)
+	c, err := innerProduct(a, b)
+	require.NoError(t, err)
+
+	// Calculate manually a0*b0 + a1*b1
+	cPrime := a[0].Mul(b[0]).Add(a[1].Mul(b[1]))
+	require.Equal(t, c, cPrime)
+}
+
+func TestSplitListofPointsHappyPath(t *testing.T) {
+	curve := curves.ED25519()
+	points := randPointVec(10, *curve)
+	firstHalf, secondHalf, err := splitPointVector(points)
+	require.NoError(t, err)
+	require.Len(t, firstHalf, 5)
+	require.Len(t, secondHalf, 5)
+}
+
+func TestSplitListofPointsOddLength(t *testing.T) {
+	curve := curves.ED25519()
+	points := randPointVec(11, *curve)
+	_, _, err := splitPointVector(points)
+	require.Error(t, err)
+}
+
+func TestSplitListofPointsZeroLength(t *testing.T) {
+	curve := curves.ED25519()
+	points := randPointVec(0, *curve)
+	_, _, err := splitPointVector(points)
+	require.Error(t, err)
+}
+
+func randScalarVec(length int, curve curves.Curve) []curves.Scalar {
+	out := make([]curves.Scalar, length)
+	for i := 0; i < length; i++ {
+		out[i] = curve.Scalar.Random(crand.Reader)
+	}
+	return out
+}
+
+func randPointVec(length int, curve curves.Curve) []curves.Point {
+	out := make([]curves.Point, length)
+	for i := 0; i < length; i++ {
+		out[i] = curve.Point.Random(crand.Reader)
+	}
+	return out
+}