public void CalculateTest(double firstValue, double expected)
{
var calculator = new ArccosxCalculator();
var result = calculator.Calculate(firstValue);
Assert.AreEqual(expected, result, 0.0001);
}
public void ExceptionByRangeTest()
{
var calculator = new ArccosxCalculator();
Assert.Throws <Exception>(() => calculator.Calculate(-2));
}