public void TestAddRejectsElementFromDifferentGroup()
{
var otherAlgebraStub = new Mock <ICryptoGroupAlgebra <BigInteger, int> >(MockBehavior.Strict);
otherAlgebraStub.Setup(alg => alg.IsPotentialElement(It.IsAny <int>())).Returns(true);
var otherElement = new CryptoGroupElement <BigInteger, int>(0, otherAlgebraStub.Object);
var algebraStub = new Mock <ICryptoGroupAlgebra <BigInteger, int> >(MockBehavior.Strict);
algebraStub.Setup(alg => alg.IsPotentialElement(It.IsAny <int>())).Returns(true);
var element = new CryptoGroupElement <BigInteger, int>(0, algebraStub.Object);
Assert.Throws <ArgumentException>(
() => element.Add(otherElement)
);
}
public void TestAdd()
{
int otherValue = 3;
int value = 7;
int expected = value + otherValue;
var algebraMock = new Mock <ICryptoGroupAlgebra <BigInteger, int> >(MockBehavior.Strict);
algebraMock.Setup(alg => alg.IsPotentialElement(It.IsAny <int>())).Returns(true);
algebraMock.Setup(alg => alg.Add(It.IsAny <int>(), It.IsAny <int>())).Returns(expected);
var element = new CryptoGroupElement <BigInteger, int>(value, algebraMock.Object);
var otherElement = new CryptoGroupElement <BigInteger, int>(otherValue, algebraMock.Object);
var result = element.Add(otherElement);
var expectedElement = new CryptoGroupElement <BigInteger, int>(expected, algebraMock.Object);
Assert.AreEqual(value, element.Value);
Assert.AreEqual(otherValue, otherElement.Value);
Assert.AreEqual(expectedElement, result);
algebraMock.Verify(alg => alg.Add(It.Is <int>(x => x == value), It.Is <int>(x => x == otherValue)), Times.Once());
}