public void Character_Presence_Should_Return_False()
{
// Arrange
var solution = new ValidNumberSolution();
//act
var result = solution.IsNumber("abc243");
//Assert
Assert.False(result);
}
public void Number_With_Character_Should_Return_False()
{
// Arrange
var solution = new ValidNumberSolution();
//act
var result = solution.IsNumber("2a");
//Assert
Assert.False(result);
}