public void SendNextLine_2CallsPlusNulls_AllLinesWritten()
{
//note that null/empty strings are not ignored here (end-of-data marks are handled in LineDispenser (and besides they are null Tuples and not Tuples with empty lines)
//arrange
const int targetNo = 11;
var target = new TextDispenserForTarget(_writer, targetNo);
var targetPO = new PrivateObject(target);
//act
target.SendNextLine("first line".ToExternalTuple(targetNo)); //note that targetNo sent to a LineDispenserForTarget here is ignored
target.SendNextLine("second line".ToExternalTuple(targetNo));
target.SendNextLine(string.Empty.ToExternalTuple(targetNo));
target.SendNextLine(new Tuple <ExternalLine, int>(null, targetNo));
//assert
targetPO.GetField("TargetNo").Should().Be(targetNo);
var writtenLines = WrittenLines.ToList();
writtenLines.Count().Should().Be(4);
writtenLines[0].Should().Be("first line");
writtenLines[1].Should().Be("second line");
writtenLines[2].Should().Be(string.Empty);
writtenLines[3].Should().Be(string.Empty); //note that null string sent to TextWriter is indistinguishable from empty string
}
public void SendNextLine_2Calls_2LinesWritten()
{
//arrange
const int targetNo = 4;
var dispenser = new TextDispenserForTarget(_writer, targetNo);
var dispenserPO = new PrivateObject(dispenser);
//act
dispenser.SendNextLine("first line".ToExternalTuple(targetNo));
dispenser.SendNextLine("second line".ToExternalTuple(targetNo));
//assert
dispenserPO.GetField("TargetNo").Should().Be(targetNo);
var writtenLines = WrittenLines.ToList();
writtenLines.Count().Should().Be(2);
writtenLines[0].Should().Be("first line");
writtenLines[1].Should().Be("second line");
}
public void Dispose_Call_MakesTargetDisposed()
{
//arrange
const int targetNo = 9;
var target = new TextDispenserForTarget(_writer, targetNo);
var targetPO = new PrivateObject(target);
//act
target.SendNextLine("first line".ToExternalTuple(targetNo));
target.Dispose();
Action a = () => { target.SendNextLine("second line".ToExternalTuple(targetNo)); };
//assert
a.Should().Throw <ObjectDisposedException>().WithMessage("Cannot write to a closed TextWriter.");
targetPO.GetField("TargetNo").Should().Be(targetNo);
var writtenLines = WrittenLines.ToList();
writtenLines.Count().Should().Be(1);
writtenLines[0].Should().Be("first line");
}
