[TestCase(new byte[] { 0 }, 1, new byte[] { 0 })] // This can be written in total.
public void Check_If_Limit_Is_Respected_When_Writing(byte[] value, byte targetLength, byte[] targetData)
{
// Arrange
var limit = (uint)2;
var numericItem = new BytePlcItem(0, 0);
Func <string, IPlcItem <byte[]> > flexiblePlcItemFactory = name => new BytesPlcItem(0, 1, true, new byte[0], name);
var dynamicPlcItem = new DynamicPlcItem <byte[]>(numericItem, flexiblePlcItemFactory, 1, limit);
// Act
dynamicPlcItem.FlexiblePlcItem.Value = value;
// Assert
Assert.That(numericItem.Value, Is.EqualTo(targetLength));
Assert.True(targetData.SequenceEqual(dynamicPlcItem.FlexiblePlcItem.Value));
}
public void Check_If_Factor_Is_Applied_When_Writing(byte[] value)
{
// Arrange
var factor = (byte)2;
var targetLength = value.Length / factor;
var numericItem = new UInt16PlcItem(0, 0);
Func <string, IPlcItem <byte[]> > flexiblePlcItemFactory = name => new BytesPlcItem(0, 1, true, new byte[0], name);
var dynamicPlcItem = new DynamicPlcItem <byte[]>(numericItem, flexiblePlcItemFactory, factor, null);
// Act
dynamicPlcItem.FlexiblePlcItem.Value = value;
// Assert
Assert.That(numericItem.Value, Is.EqualTo(targetLength));
Assert.That(dynamicPlcItem.FlexiblePlcItem.Value, Has.Length.EqualTo(value.Length));
}
[TestCase(DataConverter.Endianness.BigEndian, (ushort)50, (ushort)50)] // Value is smaller than limit → Value will be used.
public void Check_If_Limit_Is_Respected_When_Reading(DataConverter.Endianness endianness, ushort value, ushort target)
{
// Arrange
var limit = (uint)100;
INumericPlcItem numericItem;
if (endianness == DataConverter.Endianness.LittleEndian)
{
numericItem = new UInt16PlcItem(0, 0);
}
else
{
numericItem = new WordPlcItem(0, 0);
}
Func <string, IPlcItem <byte[]> > flexiblePlcItemFactory = name => new BytesPlcItem(0, 1, true, new byte[0], name);
var dynamicPlcItem = new DynamicPlcItem <byte[]>(numericItem, flexiblePlcItemFactory, 1, limit);
// Act
numericItem.Value = value;
// Assert
Assert.That(numericItem.Value, Is.EqualTo(target));
Assert.That(dynamicPlcItem.FlexiblePlcItem.Value, Has.Length.EqualTo(target));
}