public void Test_verify_input_length_less_than_checksum()
{
var checkSum = new CheckSum(new[] { 'A' }, 3);
var appender = new CheckSumAppender("-", checkSum);
Assert.IsFalse(appender.Verify(""));
Assert.IsFalse(appender.Verify("A"));
Assert.IsFalse(appender.Verify("AA"));
Assert.IsFalse(appender.Verify("AAA"));
}
public void Test_verify_is_false()
{
var checkSum = new CheckSum(10);
var appender = new CheckSumAppender("-", checkSum);
var input = appender.Append("ABCDEFGHIJKLMNOPQRSTUVW");
Assert.IsTrue(appender.Verify(input));
Assert.IsFalse(appender.Verify("A" + input));
Assert.IsFalse(appender.Verify(input + "A"));
Assert.IsFalse(appender.Verify("B" + new String(input.Skip(1).ToArray())));
}
public void Test_verify_input_null()
{
var checkSum = new CheckSum(new[] { 'A' }, 3);
var appender = new CheckSumAppender("-", checkSum);
TestHelper.AssertException <ArgumentNullException>(() => appender.Verify(null));
}
/// <summary>
/// Checks if the check sum is valid.
/// </summary>
/// <param name="hardwareIdentifier">
/// The hardware identifier to check.
/// </param>
/// <returns>
/// true if the hardware identifier has a valid check sum or the hardware
/// identifier is equal to <see cref="NoHardwareIdentifier"/>; otherwise false.
/// </returns>
internal static bool IsCheckSumValid(string hardwareIdentifier)
{
if (hardwareIdentifier == NoHardwareIdentifier)
{
return(true);
}
return(CheckSumAppender.Verify(hardwareIdentifier));
}
private static void AssertCheckSum(string separator, string input)
{
var checkSum = new CheckSum(new[] { 'A' }, 3);
var appender = new CheckSumAppender(separator, checkSum);
var expected = input + separator + "AAA";
Assert.AreEqual(expected, appender.Append(input));
Assert.IsTrue(appender.Verify(expected));
}
/// <summary>
/// Validates the check sum of the specified serial number.
/// </summary>
/// <param name="serialNumber">
/// The serial number to check.
/// </param>
/// <returns>
/// true if the check sum is valid or the serial number is equal to <see cref="NoSerialNumber"/>;
/// otherwise false.
/// </returns>
internal static bool IsCheckSumValid(string serialNumber)
{
return(CheckSumAppender.Verify(serialNumber));
}