public void TestNegateRejectsDifferentGroupElement()
{
var algebraStub = new Mock <ICryptoGroupAlgebra <BigInteger, int> >(MockBehavior.Strict);
var group = new CryptoGroup <BigInteger, int>(algebraStub.Object);
var otherAlgebra = new Mock <ICryptoGroupAlgebra <BigInteger, int> >(MockBehavior.Strict);
otherAlgebra.Setup(algebra => algebra.IsPotentialElement(It.IsAny <int>())).Returns(true);
var element = new CryptoGroupElement <BigInteger, int>(3, otherAlgebra.Object);
Assert.Throws <ArgumentException>(
() => group.Negate(element)
);
}
public void TestSpecificNegateCallsAlgebra()
{
int expectedRaw = 3;
int elementRaw = 8;
var algebraMock = new Mock <ICryptoGroupAlgebra <BigInteger, int> >(MockBehavior.Strict);
algebraMock.Setup(algebra => algebra.IsPotentialElement(It.IsAny <int>())).Returns(true);
algebraMock.Setup(algebra => algebra.Negate(It.IsAny <int>())).Returns(expectedRaw);
var groupMock = new CryptoGroup <BigInteger, int>(algebraMock.Object);
var expected = new CryptoGroupElement <BigInteger, int>(expectedRaw, algebraMock.Object);
var element = new CryptoGroupElement <BigInteger, int>(elementRaw, algebraMock.Object);
Assert.AreEqual(expected, groupMock.Negate(element));
algebraMock.Verify(
algebra => algebra.Negate(It.Is <int>(x => x == elementRaw)),
Times.Once()
);
}