public void CalculateTotalSquareAreas()
{
// Arrange
const double expectedResult = 40;
List <Square> squares = new List <Square>
{
new Square()
{
Side = 2
},
new Square
{
Side = 6
}
};
_squareRepository.Setup(m => m.GetAll()).Returns(squares);
SquareCalculator calculator = new SquareCalculator(_squareRepository.Object);
// Act
var result = calculator.GetSumCalculatedAreas();
// Assert
result.Should().BeApproximately(expectedResult, ExpectedPrecision);
}