public void LogarExceptionTest()
{
ISingle logarCalculator = new Logar();
Assert.Throws<ArgumentException>(() => logarCalculator.CreateCalculate(-1));
}
public void LogarTest(double first, double expected)
{
ISingle logarCalculator = new Logar();
double result = logarCalculator.CreateCalculate(first);
Assert.AreEqual(expected, result);
}