public void ToBase62Chars8_WithOverlappingInputAndOutputSpans_ShouldReturnExpectedOutput(string text, string base62String)
{
Span <byte> bytes = stackalloc byte[11];
System.Text.Encoding.UTF8.GetBytes(text, bytes);
Base62.ToBase62Chars8(bytes, bytes);
var outputString = System.Text.Encoding.UTF8.GetString(bytes);
Assert.Equal(base62String, outputString);
}
public void ToBase62Chars8_Regularly_ShouldReturnExpectedOutput(string text, string base62String)
{
var bytes = System.Text.Encoding.UTF8.GetBytes(text);
Span <byte> outputChars = stackalloc byte[base62String.Length];
Base62.ToBase62Chars8(bytes, outputChars);
var outputString = System.Text.Encoding.UTF8.GetString(outputChars);
Assert.Equal(base62String, outputString);
}
/// <summary>
/// <para>
/// Outputs an 11-character alphanumeric string representation of the given ID.
/// </para>
/// <para>
/// Throws if the output span is too short.
/// </para>
/// </summary>
/// <param name="id">The ID to encode.</param>
/// <param name="bytes">At least 11 bytes, to write the alphanumeric representation to.</param>
public static void GetAlphanumeric(ulong id, Span <byte> bytes)
{
if (bytes.Length < 11)
{
throw new IndexOutOfRangeException("At least 11 output bytes are required.");
}
// Abuse the caller's output span as input space
BinaryPrimitives.WriteUInt64BigEndian(bytes, id);
Base62.ToBase62Chars8(bytes, bytes);
}