public void Hypotense_ReturnsSquareRootOfTheSumOfSquares()
{
_mockMathService.Setup(x => x.Squared(1))
.Returns(111);
_mockMathService.Setup(x => x.Squared(2))
.Returns(222);
_mockMathService.Setup(x => x.Add(111, 222))
.Returns(333);
_mockMathService.Setup(x => x.SquareRoot(333))
.Returns(444);
var expectedResult = 444;
var actualResult = _target.Hypotense(1, 2);
Assert.AreEqual(expectedResult, actualResult);
_mockMathService.Verify(x => x.Squared(1), Times.Once);
_mockMathService.Verify(x => x.Squared(2), Times.Once);
_mockMathService.Verify(x => x.Add(111, 222), Times.Once);
_mockMathService.Verify(x => x.SquareRoot(333), Times.Once);
}