Merge pull request #410 from dedis/bn256-addmul-test

pairing/bn256: test for add/mul consistency
corestario · Jan 9, 2020 · 406d4f5 · 406d4f5
2 parents a5a2914 + 019907a
commit 406d4f5
Showing 1 changed file with 12 additions and 0 deletions.
diff --git a/pairing/bn256/suite_test.go b/pairing/bn256/suite_test.go
@@ -286,6 +286,18 @@ func basicPointTest(t *testing.T, s *Suite) {
 	err = paCopy.UnmarshalBinary(paBuf)
 	require.Nil(t, err)
 	require.True(t, pa.Equal(paCopy))
+
+	const addersTarget = 123
+	scalarUnit := s.Scalar().One()
+	pointUnit := s.Point().Mul(scalarUnit, nil)
+
+	scalarAdder := s.Scalar().Zero()
+	pointAdder := s.Point().Mul(scalarAdder, nil)
+	for i := 0; i < addersTarget; i++ {
+		scalarAdder.Add(scalarAdder, scalarUnit)
+		pointAdder.Add(pointAdder, pointUnit)
+	}
+	require.True(t, pointAdder.Equal(s.Point().Mul(scalarAdder, nil)))
 }
 
 // Test that the suite.Read works correctly for suites with a defined `Point()`.