public void to_double()
{
Assert.Throws <ArgumentNullException>(() => StringExtensions.ToDouble(null));
Assert.Throws <ArgumentException>(() => string.Empty.ToDouble());
const string Invalid = "invalid";
Assert.Equal(double.Epsilon, double.Epsilon.ToString().ToDouble());
Assert.Throws <FormatException>(() => Invalid.ToDouble());
double result;
Assert.True(double.Epsilon.ToString().ToDouble(out result));
Assert.Equal(double.Epsilon, result);
Assert.False(Invalid.ToDouble(out result));
Assert.Equal(default(double), result);
}
