public void to_int64()
{
Assert.Throws <ArgumentNullException>(() => StringExtensions.ToInt64(null));
Assert.Throws <ArgumentException>(() => string.Empty.ToInt64());
const string Invalid = "invalid";
Assert.Equal(long.MaxValue, long.MaxValue.ToString(CultureInfo.InvariantCulture).ToInt64());
Assert.Throws <FormatException>(() => Invalid.ToInt64());
long result;
Assert.True(long.MaxValue.ToString(CultureInfo.InvariantCulture).ToInt64(out result));
Assert.Equal(long.MaxValue, result);
Assert.False(Invalid.ToInt64(out result));
Assert.Equal(default(long), result);
}
