public void CanItemHeaderGetRawHeaderData(SecsFormat expectedSecsFormat, int expectedItemLength, byte expectedNumberOfLengthBytes, byte expectedRawHeaderDataSize)
{
ItemHeader itemHeader = new ItemHeader(expectedSecsFormat, expectedItemLength);
byte[] expectedRawHeaderData = new byte[expectedRawHeaderDataSize];
expectedRawHeaderData[0] = (byte)((int)expectedSecsFormat | expectedNumberOfLengthBytes);
switch (expectedNumberOfLengthBytes)
{
case 1:
expectedRawHeaderData[1] = (byte)expectedItemLength;
break;
case 2:
expectedRawHeaderData[1] = (byte)(expectedItemLength >> 8);
expectedRawHeaderData[2] = (byte)expectedItemLength;
break;
case 3:
expectedRawHeaderData[1] = (byte)(expectedItemLength >> 16);
expectedRawHeaderData[2] = (byte)(expectedItemLength >> 8);
expectedRawHeaderData[3] = (byte)expectedItemLength;
break;
default:
throw new ArgumentOutOfRangeException(nameof(expectedNumberOfLengthBytes), expectedNumberOfLengthBytes, "The argument must be 1, 2 or 3.");
}
byte[] actualRawHeaderData = itemHeader.GetRawHeaderData();
CollectionAssert.AreEqual(expectedRawHeaderData, actualRawHeaderData);
}
public void CanItemHeaderBeConstructed(SecsFormat expectedSecsFormat, int expectedItemLength, byte expectedNumberOfLengthBytes, byte expectedRawHeaderDataSize)
{
ItemHeader itemHeader = new ItemHeader(expectedSecsFormat, expectedItemLength);
Assert.IsTrue(itemHeader.IsValid, nameof(itemHeader.IsValid));
Assert.AreEqual(expectedSecsFormat, itemHeader.Format, nameof(itemHeader.Format));
Assert.AreEqual(expectedItemLength, itemHeader.ItemLength, nameof(itemHeader.ItemLength));
Assert.AreEqual(expectedNumberOfLengthBytes, itemHeader.NumberOfLengthBytes, nameof(itemHeader.NumberOfLengthBytes));
Assert.AreEqual(expectedRawHeaderDataSize, itemHeader.RawHeaderDataSize, nameof(itemHeader.RawHeaderDataSize));
byte[] expectedRawHeaderData = new byte[expectedRawHeaderDataSize];
expectedRawHeaderData[0] = (byte)((int)expectedSecsFormat | expectedNumberOfLengthBytes);
switch (expectedNumberOfLengthBytes)
{
case 1:
expectedRawHeaderData[1] = (byte)expectedItemLength;
break;
case 2:
expectedRawHeaderData[1] = (byte)(expectedItemLength >> 8);
expectedRawHeaderData[2] = (byte)expectedItemLength;
break;
case 3:
expectedRawHeaderData[1] = (byte)(expectedItemLength >> 16);
expectedRawHeaderData[2] = (byte)(expectedItemLength >> 8);
expectedRawHeaderData[3] = (byte)expectedItemLength;
break;
default:
throw new ArgumentOutOfRangeException(nameof(expectedNumberOfLengthBytes), expectedNumberOfLengthBytes, "The argument must be 1, 2 or 3.");
}
byte[] actualRawHeaderData = itemHeader.GetRawHeaderData();
CollectionAssert.AreEqual(expectedRawHeaderData, actualRawHeaderData);
byte[] expectedItemBufferWithRawHeaderData = new byte[expectedRawHeaderDataSize + expectedItemLength];
Array.Copy(expectedRawHeaderData, 0, expectedItemBufferWithRawHeaderData, 0, expectedRawHeaderData.Length);
var(actualItemBufferWithRawHeaderData, actualOffset) = itemHeader.GetItemBufferWithRawHeaderData();
Assert.AreEqual(expectedRawHeaderDataSize, actualOffset, nameof(actualOffset));
CollectionAssert.AreEqual(expectedItemBufferWithRawHeaderData, actualItemBufferWithRawHeaderData);
}