public void AllPerimetersGoInPolgonDirection()
{
string thinWallsSTL = TestUtlities.GetStlPath("ThinWallsRect.stl");
string thinWallsGCode = TestUtlities.GetTempGCodePath("ThinWallsRect.stl");
{
// load a model that is correctly manifold
ConfigSettings config = new ConfigSettings();
config.ExpandThinWalls = true;
fffProcessor processor = new fffProcessor(config);
processor.SetTargetFile(thinWallsGCode);
processor.LoadStlFile(thinWallsSTL);
// slice and save it
processor.DoProcessing();
processor.finalize();
string[] thinWallsGCodeContent = TestUtlities.LoadGCodeFile(thinWallsGCode);
int layerCount = TestUtlities.CountLayers(thinWallsGCodeContent);
for (int i = 2; i < layerCount - 2; i++)
{
var layerGCode = TestUtlities.GetGCodeForLayer(thinWallsGCodeContent, i);
var polygons = TestUtlities.GetExtrusionPolygons(layerGCode, 1000);
foreach (var polygon in polygons)
{
Assert.AreEqual(1, polygon.GetWindingDirection());
}
}
}
}
public void BottomClipCorrectNumberOfLayers()
{
// test .1 layer height
Assert.IsTrue(TestUtlities.CountLayers(TestUtlities.LoadGCodeFile(CreateGCodeForLayerHeights(.2, .2, .2))) == 49);
Assert.IsTrue(TestUtlities.CountLayers(TestUtlities.LoadGCodeFile(CreateGCodeForLayerHeights(.2, .2, .31))) == 48);
Assert.IsTrue(TestUtlities.CountLayers(TestUtlities.LoadGCodeFile(CreateGCodeForLayerHeights(.2, .2, .4))) == 48);
}
public void AlwaysRetractOnIslandChange()
{
string meshWithIslands = TestUtlities.GetStlPath("comb");
string gCodeWithIslands = TestUtlities.GetTempGCodePath("comb-box");
{
// load a model that has 3 islands
ConfigSettings config = new ConfigSettings();
// make sure no retractions are going to occure that are island crossing
config.MinimumTravelToCauseRetraction = 2000;
fffProcessor processor = new fffProcessor(config);
processor.SetTargetFile(gCodeWithIslands);
processor.LoadStlFile(meshWithIslands);
// slice and save it
processor.DoProcessing();
processor.finalize();
string[] gcodeContents = TestUtlities.LoadGCodeFile(gCodeWithIslands);
int numLayers = TestUtlities.CountLayers(gcodeContents);
for (int i = 1; i < numLayers - 1; i++)
{
string[] layer = TestUtlities.GetGCodeForLayer(gcodeContents, i);
int totalRetractions = TestUtlities.CountRetractions(layer);
Assert.IsTrue(totalRetractions == 6);
}
}
}
private static void CheckSpiralCone(string stlFile, string gcodeFile)
{
string cylinderStlFile = TestUtlities.GetStlPath(stlFile);
string cylinderGCodeFileName = TestUtlities.GetTempGCodePath(gcodeFile);
ConfigSettings config = new ConfigSettings();
config.FirstLayerThickness = .2;
config.CenterObjectInXy = false;
config.LayerThickness = .2;
config.NumberOfBottomLayers = 0;
config.ContinuousSpiralOuterPerimeter = true;
fffProcessor processor = new fffProcessor(config);
processor.SetTargetFile(cylinderGCodeFileName);
processor.LoadStlFile(cylinderStlFile);
// slice and save it
processor.DoProcessing();
processor.finalize();
string[] cylinderGCodeContent = TestUtlities.LoadGCodeFile(cylinderGCodeFileName);
// test .1 layer height
int layerCount = TestUtlities.CountLayers(cylinderGCodeContent);
Assert.IsTrue(layerCount == 50);
for (int i = 2; i < layerCount - 3; i++)
{
string[] layerInfo = TestUtlities.GetGCodeForLayer(cylinderGCodeContent, i);
// check that all layers move up continuously
MovementInfo lastMovement = new MovementInfo();
foreach (MovementInfo movement in TestUtlities.Movements(layerInfo))
{
Assert.IsTrue(movement.position.z > lastMovement.position.z);
lastMovement = movement;
}
double radiusForLayer = 5.0 + (20.0 - 5.0) / layerCount * i;
bool first = true;
lastMovement = new MovementInfo();
// check that all moves are on the outside of the cylinder (not crossing to a new point)
foreach (MovementInfo movement in TestUtlities.Movements(layerInfo))
{
if (!first)
{
Assert.IsTrue((movement.position - lastMovement.position).Length < 2);
Vector3 xyOnly = new Vector3(movement.position.x, movement.position.y, 0);
Assert.AreEqual(radiusForLayer, xyOnly.Length, .3);
}
lastMovement = movement;
first = false;
}
}
}
public void CorrectNumberOfLayersForLayerHeights()
{
// test .1 layer height
Assert.IsTrue(TestUtlities.CountLayers(TestUtlities.LoadGCodeFile(CreateGCodeForLayerHeights(.1, .1))) == 100);
Assert.IsTrue(TestUtlities.CountLayers(TestUtlities.LoadGCodeFile(CreateGCodeForLayerHeights(.2, .1))) == 99);
Assert.IsTrue(TestUtlities.CountLayers(TestUtlities.LoadGCodeFile(CreateGCodeForLayerHeights(.2, .2))) == 50);
Assert.IsTrue(TestUtlities.CountLayers(TestUtlities.LoadGCodeFile(CreateGCodeForLayerHeights(.05, .2))) == 51);
}
public void CorrectNumberOfLayersForLayerHeights()
{
// test .1 layer height
Assert.AreEqual(100, TestUtlities.CountLayers(TestUtlities.LoadGCodeFile(CreateGCodeForLayerHeights(.1, .1))));
Assert.AreEqual(99, TestUtlities.CountLayers(TestUtlities.LoadGCodeFile(CreateGCodeForLayerHeights(.2, .1))));
Assert.AreEqual(50, TestUtlities.CountLayers(TestUtlities.LoadGCodeFile(CreateGCodeForLayerHeights(.2, .2))));
Assert.AreEqual(51, TestUtlities.CountLayers(TestUtlities.LoadGCodeFile(CreateGCodeForLayerHeights(.05, .2))));
}
public void AllMovesRequiringRetractionDoRetraction()
{
string baseFileName = "ab retraction test";
string stlToLoad = TestUtlities.GetStlPath(baseFileName + ".stl");
// check that default is support printed with extruder 0
{
string gcodeToCreate = TestUtlities.GetTempGCodePath(baseFileName + "_retract_" + ".gcode");
ConfigSettings config = new ConfigSettings();
config.RetractionZHop = 5;
config.MinimumTravelToCauseRetraction = 2;
config.MinimumExtrusionBeforeRetraction = 0;
config.FirstLayerExtrusionWidth = .5;
fffProcessor processor = new fffProcessor(config);
processor.SetTargetFile(gcodeToCreate);
processor.LoadStlFile(stlToLoad);
// slice and save it
processor.DoProcessing();
processor.finalize();
string[] gcodeContents = TestUtlities.LoadGCodeFile(gcodeToCreate);
int layerCount = TestUtlities.CountLayers(gcodeContents);
bool firstPosition = true;
for (int i = 0; i < layerCount; i++)
{
string[] layerGCode = TestUtlities.GetGCodeForLayer(gcodeContents, i);
MovementInfo lastMovement = new MovementInfo();
foreach (MovementInfo movement in TestUtlities.Movements(layerGCode))
{
if (!firstPosition)
{
bool isTravel = lastMovement.extrusion == movement.extrusion;
if (isTravel)
{
Vector3 lastPosition = lastMovement.position;
lastPosition.z = 0;
Vector3 currenPosition = movement.position;
currenPosition.z = 0;
double xyLength = (lastPosition - currenPosition).Length;
if (xyLength > config.MinimumTravelToCauseRetraction)
{
Assert.IsTrue(movement.position.z > lastMovement.position.z);
}
}
}
lastMovement = movement;
firstPosition = false;
}
}
Assert.IsFalse(TestUtlities.UsesExtruder(gcodeContents, 1));
Assert.IsFalse(TestUtlities.UsesExtruder(gcodeContents, 2));
}
}
public void AllInsidesBeforeAnyOutsides()
{
string thinAttachStlFile = TestUtlities.GetStlPath("Thin Attach");
string thinAttachGCodeFile = TestUtlities.GetTempGCodePath("Thin Attach.gcode");
ConfigSettings config = new ConfigSettings();
config.NumberOfPerimeters = 2;
config.InfillPercent = 0;
config.NumberOfTopLayers = 0;
config.FirstLayerExtrusionWidth = .4;
config.NumberOfBottomLayers = 0;
fffProcessor processor = new fffProcessor(config);
processor.SetTargetFile(thinAttachGCodeFile);
processor.LoadStlFile(thinAttachStlFile);
// slice and save it
processor.DoProcessing();
processor.finalize();
string[] gcode = TestUtlities.LoadGCodeFile(thinAttachGCodeFile);
// should look like this
// ____________ ____________
// | _______ | | _______ |
// | | | | | | | |
// | | | |___| | | |
// | | | ____ | | |
// | |______| | | |______| |
// |__________| |__________|
MovementInfo movement = new MovementInfo();
{
// check layer 1
string[] layer1Info = TestUtlities.GetGCodeForLayer(gcode, 1);
Polygons layer1Polygons = TestUtlities.GetExtrusionPolygons(layer1Info, ref movement);
// make sure there are 5
Assert.IsTrue(layer1Polygons.Count == 3);
// make sure they are in the right order (two inner polygons print first)
Assert.IsTrue(layer1Polygons[0].MinX() > layer1Polygons[1].MinX());
Assert.IsTrue(layer1Polygons[0].MinX() > layer1Polygons[2].MinX());
}
{
// check layer 2
string[] layer2Info = TestUtlities.GetGCodeForLayer(gcode, 2);
Polygons layer2Polygons = TestUtlities.GetExtrusionPolygons(layer2Info, ref movement);
// make sure there are 3
Assert.IsTrue(layer2Polygons.Count == 3);
// make sure they are in the right order (two inner polygons print first)
Assert.IsTrue(layer2Polygons[0].MinX() > layer2Polygons[1].MinX());
Assert.IsTrue(layer2Polygons[0].MinX() > layer2Polygons[2].MinX());
}
}
private static void CheckLayersIncrement(string stlFile, string gcodeFile)
{
string risingLayersStlFile = TestUtlities.GetStlPath(stlFile);
string risingLayersGCodeFileName = TestUtlities.GetTempGCodePath(gcodeFile);
ConfigSettings config = new ConfigSettings();
config.FirstLayerThickness = .2;
config.CenterObjectInXy = false;
config.LayerThickness = .2;
fffProcessor processor = new fffProcessor(config);
processor.SetTargetFile(risingLayersGCodeFileName);
processor.LoadStlFile(risingLayersStlFile);
// slice and save it
processor.DoProcessing();
processor.finalize();
string[] risingLayersGCodeContent = TestUtlities.LoadGCodeFile(risingLayersGCodeFileName);
// test .1 layer height
int layerCount = TestUtlities.CountLayers(risingLayersGCodeContent);
Assert.IsTrue(layerCount == 50);
MovementInfo startingPosition = new MovementInfo();
for (int layerIndex = 0; layerIndex < layerCount; layerIndex++)
{
string[] layerInfo = TestUtlities.GetGCodeForLayer(risingLayersGCodeContent, layerIndex);
int movementIndex = 0;
// check that all layers move up
foreach (MovementInfo movement in TestUtlities.Movements(layerInfo, startingPosition))
{
if (movement.line.Contains("X") ||
movement.line.Contains("Y") ||
movement.line.Contains("Z"))
{
if (layerIndex > 0)
{
Assert.AreEqual(movement.position.z, .2 + layerIndex * .2, .001);
Assert.IsTrue(movement.position.z >= startingPosition.position.z);
}
}
// always go up
startingPosition.position = new Vector3(0, 0, Math.Max(startingPosition.position.z, movement.position.z));
movementIndex++;
}
}
}
public void OuterPerimeterFirstCorrect()
{
string box20MmStlFile = TestUtlities.GetStlPath("20mm-box");
string boxGCodeFile = TestUtlities.GetTempGCodePath("20mm-box-perimeter.gcode");
ConfigSettings config = new ConfigSettings();
config.NumberOfPerimeters = 3;
config.OutsidePerimetersFirst = true;
config.InfillPercent = 0;
config.NumberOfTopLayers = 0;
config.NumberOfBottomLayers = 0;
fffProcessor processor = new fffProcessor(config);
processor.SetTargetFile(boxGCodeFile);
processor.LoadStlFile(box20MmStlFile);
// slice and save it
processor.DoProcessing();
processor.finalize();
string[] gcode = TestUtlities.LoadGCodeFile(boxGCodeFile);
MovementInfo movement = new MovementInfo();
{
// check layer 1
string[] layer1Info = TestUtlities.GetGCodeForLayer(gcode, 1);
Polygons layer1Polygons = TestUtlities.GetExtrusionPolygons(layer1Info, ref movement);
// make sure there are 3
Assert.IsTrue(layer1Polygons.Count == 3);
// make sure they are in the right order (first layer is outside in)
Assert.IsTrue(layer1Polygons[0].MinX() < layer1Polygons[1].MinX());
}
{
// check layer 2
string[] layer2Info = TestUtlities.GetGCodeForLayer(gcode, 2);
Polygons layer2Polygons = TestUtlities.GetExtrusionPolygons(layer2Info, ref movement);
// make sure there are 3
Assert.IsTrue(layer2Polygons.Count == 3);
// make sure they are in the right order (other layers are inside out)
Assert.IsTrue(layer2Polygons[0].MinX() < layer2Polygons[1].MinX());
}
}
public void OuterPerimeterFirstCorrect()
{
string box20MmStlFile = TestUtlities.GetStlPath("20mm-box");
string boxGCodeFile = TestUtlities.GetTempGCodePath("20mm-box-perimeter.gcode");
ConfigSettings config = new ConfigSettings();
config.NumberOfPerimeters = 3;
config.InfillPercent = 0;
fffProcessor processor = new fffProcessor(config);
processor.SetTargetFile(boxGCodeFile);
processor.LoadStlFile(box20MmStlFile);
// slice and save it
processor.DoProcessing();
processor.finalize();
string[] gcode = TestUtlities.LoadGCodeFile(boxGCodeFile);
{
// check layer 0
string[] layer0Info = TestUtlities.GetGCodeForLayer(gcode, 0);
List <Polygons> layer0Polygons = TestUtlities.GetExtrusionPolygons(layer0Info);
// make sure there are 3
Assert.IsTrue(layer0Polygons.Count == 3);
// make sure they are in the right order (first layer is outside in)
}
{
// check layer 1
string[] layer1Info = TestUtlities.GetGCodeForLayer(gcode, 1);
List <Polygons> layer1Polygons = TestUtlities.GetExtrusionPolygons(layer1Info);
// make sure there are 3
Assert.IsTrue(layer1Polygons.Count == 3);
// make sure they are in the right order (other layers are inside out)
}
}
public void CanSetExtruderForSupportMaterial()
{
string baseFileName = "Support Material 2 Bars";
string stlToLoad = TestUtlities.GetStlPath(baseFileName + ".stl");
// check that default is support printed with extruder 0
{
string gcodeToCreate = TestUtlities.GetTempGCodePath(baseFileName + "_0_" + ".gcode");
ConfigSettings config = new ConfigSettings();
fffProcessor processor = new fffProcessor(config);
processor.SetTargetFile(gcodeToCreate);
processor.LoadStlFile(stlToLoad);
// slice and save it
processor.DoProcessing();
processor.finalize();
string[] gcodeContents = TestUtlities.LoadGCodeFile(gcodeToCreate);
Assert.IsFalse(TestUtlities.UsesExtruder(gcodeContents, 1));
Assert.IsFalse(TestUtlities.UsesExtruder(gcodeContents, 2));
}
// check that support is printed with extruder 1
{
string gcodeToCreate = TestUtlities.GetTempGCodePath(baseFileName + "_1b_" + ".gcode");
ConfigSettings config = new ConfigSettings();
config.SupportExtruder = 1;
config.GenerateSupport = true;
fffProcessor processor = new fffProcessor(config);
processor.SetTargetFile(gcodeToCreate);
processor.LoadStlFile(stlToLoad);
// slice and save it
processor.DoProcessing();
processor.finalize();
string[] gcodeContents = TestUtlities.LoadGCodeFile(gcodeToCreate);
Assert.IsTrue(TestUtlities.UsesExtruder(gcodeContents, 1));
Assert.IsFalse(TestUtlities.UsesExtruder(gcodeContents, 2));
}
// check that support interface is printed with extruder 1
{
string gcodeToCreate = TestUtlities.GetTempGCodePath(baseFileName + "_1i_" + ".gcode");
ConfigSettings config = new ConfigSettings();
config.SupportInterfaceExtruder = 1;
config.GenerateSupport = true;
fffProcessor processor = new fffProcessor(config);
processor.SetTargetFile(gcodeToCreate);
processor.LoadStlFile(stlToLoad);
// slice and save it
processor.DoProcessing();
processor.finalize();
string[] gcodeContents = TestUtlities.LoadGCodeFile(gcodeToCreate);
Assert.IsTrue(TestUtlities.UsesExtruder(gcodeContents, 1));
Assert.IsFalse(TestUtlities.UsesExtruder(gcodeContents, 2));
}
// check that support and interface can be set separately
{
string gcodeToCreate = TestUtlities.GetTempGCodePath(baseFileName + "_1b2i_" + ".gcode");
ConfigSettings config = new ConfigSettings();
config.SupportExtruder = 1;
config.SupportInterfaceExtruder = 2;
config.GenerateSupport = true;
fffProcessor processor = new fffProcessor(config);
processor.SetTargetFile(gcodeToCreate);
processor.LoadStlFile(stlToLoad);
// slice and save it
processor.DoProcessing();
processor.finalize();
string[] gcodeContents = TestUtlities.LoadGCodeFile(gcodeToCreate);
Assert.IsTrue(TestUtlities.UsesExtruder(gcodeContents, 1));
Assert.IsTrue(TestUtlities.UsesExtruder(gcodeContents, 2));
}
}
public void ExportGCodeWithRaft()
{
//test that file has raft
Assert.IsTrue(TestUtlities.CheckForRaft(TestUtlities.LoadGCodeFile(CreateGCodeWithRaft(true))) == true);
Assert.IsTrue(TestUtlities.CheckForRaft(TestUtlities.LoadGCodeFile(CreateGcodeWithoutRaft(false))) == false);
}
public void DualMaterialPrintMovesCorrectly(bool createWipeTower)
{
string leftPart = "Box Left";
string rightPart = "Box Right";
string leftStlFile = TestUtlities.GetStlPath(leftPart);
string rightStlFile = TestUtlities.GetStlPath(rightPart);
string outputGCodeFileName = TestUtlities.GetTempGCodePath("DualPartMoves");
ConfigSettings config = new ConfigSettings();
config.FirstLayerThickness = .2;
config.LayerThickness = .2;
config.NumberOfBottomLayers = 0;
if (createWipeTower)
{
config.WipeTowerSize = 10;
}
else
{
config.WipeTowerSize = 0;
}
fffProcessor processor = new fffProcessor(config);
processor.SetTargetFile(outputGCodeFileName);
processor.LoadStlFile(leftStlFile);
processor.LoadStlFile(rightStlFile);
// slice and save it
processor.DoProcessing();
processor.finalize();
string[] gCodeContent = TestUtlities.LoadGCodeFile(outputGCodeFileName);
// test .1 layer height
int layerCount = TestUtlities.CountLayers(gCodeContent);
Assert.IsTrue(layerCount == 50);
bool hadMoveLessThan85 = false;
MovementInfo lastMovement = new MovementInfo();
for (int i = 0; i < layerCount - 3; i++)
{
string[] layerInfo = TestUtlities.GetGCodeForLayer(gCodeContent, i);
// check that all layers move up continuously
foreach (MovementInfo movement in TestUtlities.Movements(layerInfo, lastMovement, onlyG1s: true))
{
if (i > 2)
{
if (createWipeTower)
{
Assert.IsTrue(movement.position.x > 75 && movement.position.y > 10, "Moves don't go to 0");
if (movement.position.x < 85)
{
hadMoveLessThan85 = true;
}
}
else
{
Assert.IsTrue(movement.position.x > 85 && movement.position.y > 10, "Moves don't go to 0");
}
}
lastMovement = movement;
}
}
if (createWipeTower)
{
Assert.IsTrue(hadMoveLessThan85, "found a wipe tower");
}
}
public void DoHas2WallRingsAllTheWayUp(string fileName, int expectedLayerCount, bool checkRadius = false)
{
string stlFile = TestUtlities.GetStlPath(fileName);
string gCodeFile = TestUtlities.GetTempGCodePath(fileName + ".gcode");
ConfigSettings config = new ConfigSettings();
config.InfillPercent = 0;
config.NumberOfPerimeters = 1;
config.FirstLayerExtrusionWidth = .2;
config.LayerThickness = .2;
config.NumberOfBottomLayers = 0;
config.NumberOfTopLayers = 0;
fffProcessor processor = new fffProcessor(config);
processor.SetTargetFile(gCodeFile);
processor.LoadStlFile(stlFile);
// slice and save it
processor.DoProcessing();
processor.finalize();
string[] gcodeLines = TestUtlities.LoadGCodeFile(gCodeFile);
int layerCount = TestUtlities.CountLayers(gcodeLines);
Assert.IsTrue(layerCount == expectedLayerCount);
MovementInfo movement = new MovementInfo();
for (int i = 0; i < layerCount - 5; i++)
{
string[] layerInfo = TestUtlities.GetGCodeForLayer(gcodeLines, i);
if (i > 0)
{
Polygons layerPolygons = TestUtlities.GetExtrusionPolygons(layerInfo, ref movement);
Assert.IsTrue(layerPolygons.Count == 2);
if (checkRadius)
{
Assert.IsTrue(layerPolygons[0].Count > 10);
Assert.IsTrue(layerPolygons[1].Count > 10);
if (false)
{
foreach (var polygon in layerPolygons)
{
double radiusForPolygon = polygon[0].LengthMm();
foreach (var point in polygon)
{
Assert.AreEqual(radiusForPolygon, point.LengthMm(), 15);
}
}
}
}
}
else
{
TestUtlities.GetExtrusionPolygons(layerInfo, ref movement);
}
}
}
public void AllMovesRequiringRetractionDoRetraction(string baseFileName, string settingsIniFile = "")
{
string stlToLoad = TestUtlities.GetStlPath(baseFileName + ".stl");
// check that default is support printed with extruder 0
string gcodeToCreate = TestUtlities.GetTempGCodePath(baseFileName + "_retract_.gcode");
ConfigSettings config = new ConfigSettings();
if (settingsIniFile == "")
{
config.MinimumTravelToCauseRetraction = 2;
config.MinimumExtrusionBeforeRetraction = 0;
config.MergeOverlappingLines = false;
config.FirstLayerExtrusionWidth = .5;
}
else
{
config.ReadSettings(settingsIniFile);
}
// this is what we detect
config.RetractionZHop = 5;
fffProcessor processor = new fffProcessor(config);
processor.SetTargetFile(gcodeToCreate);
processor.LoadStlFile(stlToLoad);
// slice and save it
processor.DoProcessing();
processor.finalize();
string[] gcodeContents = TestUtlities.LoadGCodeFile(gcodeToCreate);
int layerCount = TestUtlities.CountLayers(gcodeContents);
bool firstPosition = true;
MovementInfo lastMovement = new MovementInfo();
MovementInfo lastExtrusion = new MovementInfo();
bool lastMoveIsExtrusion = true;
for (int layerIndex = 0; layerIndex < layerCount; layerIndex++)
{
string[] layerGCode = TestUtlities.GetGCodeForLayer(gcodeContents, layerIndex);
int movementIndex = 0;
foreach (MovementInfo movement in TestUtlities.Movements(layerGCode, lastMovement))
{
if (!firstPosition)
{
bool isTravel = lastMovement.extrusion == movement.extrusion;
if (isTravel)
{
Vector3 lastPosition = lastMovement.position;
lastPosition.z = 0;
Vector3 currenPosition = movement.position;
currenPosition.z = 0;
double xyLength = (lastPosition - currenPosition).Length;
if (xyLength > config.MinimumTravelToCauseRetraction &&
lastMoveIsExtrusion)
{
Assert.GreaterOrEqual(movement.position.z, lastExtrusion.position.z);
}
lastMoveIsExtrusion = false;
}
else
{
lastMoveIsExtrusion = true;
lastExtrusion = movement;
}
lastMoveIsExtrusion = !isTravel;
}
lastMovement = movement;
firstPosition = false;
movementIndex++;
}
}
// make sure we don't switch extruders
Assert.IsFalse(TestUtlities.UsesExtruder(gcodeContents, 1));
Assert.IsFalse(TestUtlities.UsesExtruder(gcodeContents, 2));
}