public void Should_Throw_Argument_Exception_When_Invalid_Input_Is_Passed()
{
var provider = new NumberTokenProvider(new HashSet <char>());
var expression = " 32.23";
Assert.Throws <ArgumentException>(() => provider.GetToken(0, expression));
}
public void Should_Return_Number_Token_When_Decimal_Is_Passed()
{
var provider = new NumberTokenProvider(new HashSet <char>());
var expression = "32.23";
var result = provider.GetToken(0, expression);
Assert.Equal(0, result.StartIndex);
Assert.Equal(4, result.EndIndex);
Assert.Equal("32.23", result.Token.Value);
Assert.IsType <NumberToken>(result.Token);
}