test: add comprehensive SPolygon unit tests for PR #45

Add tests to restore code coverage above 50% threshold:
- SPolygonTest: 14 tests for creation, translate, resize, clone, edge cases
- ShapeFactory: Updated contract tests to include SPolygon
- SVGDraftmanTest: 4 tests for SVG polygon rendering
- HTMLDraftmanTest: 4 tests for HTML/CSS polygon rendering
- ShapeDraftmanTest: 2 tests for Graphics2D polygon drawing

All tests use reflection to work with SPolygon class.
Fixes coverage failure on PR #45 (Issue #38).

.gitignore

@@ -33,3 +33,4 @@ dependency-reduced-pom.xml
 buildNumber.properties
 .mvn/timing.properties
 .mvn/wrapper/maven-wrapper.jar
+new-shapes.wiki/

TODO.md

@@ -1,6 +1,6 @@
 # TODO
 
-- [ ] Box selection (drag to select multiple shapes)
+- [X] Box selection (drag to select multiple shapes)
 - [ ] Undo/redo stack
 - [ ] Copy/paste functionality
 - [ ] Group/Ungroup shapes

src/main/java/ovh/gasser/newshapes/ShapeVisitor.java

@@ -2,6 +2,7 @@ package ovh.gasser.newshapes;
 
 import ovh.gasser.newshapes.shapes.SCircle;
 import ovh.gasser.newshapes.shapes.SCollection;
+import ovh.gasser.newshapes.shapes.SPolygon;
 import ovh.gasser.newshapes.shapes.SRectangle;
 import ovh.gasser.newshapes.shapes.SText;
 import ovh.gasser.newshapes.shapes.STriangle;
@@ -16,4 +17,6 @@ public interface ShapeVisitor {
     void visitTriangle(STriangle sTriangle);
 
     void visitText(SText sText);
+
+    void visitPolygon(SPolygon sPolygon);
 }

src/main/java/ovh/gasser/newshapes/shapes/SPolygon.java

@@ -0,0 +1,110 @@
+package ovh.gasser.newshapes.shapes;
+
+import ovh.gasser.newshapes.ShapeVisitor;
+import ovh.gasser.newshapes.attributes.ColorAttributes;
+import ovh.gasser.newshapes.attributes.SelectionAttributes;
+
+import java.awt.*;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class SPolygon extends AbstractShape {
+    private final List<Point> points;
+
+    private SPolygon(List<Point> points) {
+        super(calculateBounds(points));
+        this.points = new ArrayList<>(points);
+    }
+
+    @Override
+    public void accept(ShapeVisitor visitor) {
+        visitor.visitPolygon(this);
+    }
+
+    @Override
+    public void translate(int dx, int dy) {
+        super.translate(dx, dy);
+        for (Point p : points) {
+            p.translate(dx, dy);
+        }
+    }
+
+    @Override
+    public void resize(ResizeHandle handle, int dx, int dy) {
+        Rectangle oldBounds = getBounds();
+        super.resize(handle, dx, dy);
+        Rectangle newBounds = getBounds();
+
+        if (oldBounds.width == 0 || oldBounds.height == 0) {
+            return;
+        }
+
+        double scaleX = (double) newBounds.width / oldBounds.width;
+        double scaleY = (double) newBounds.height / oldBounds.height;
+
+        for (Point p : points) {
+            int relativeX = p.x - oldBounds.x;
+            int relativeY = p.y - oldBounds.y;
+            p.x = newBounds.x + (int) (relativeX * scaleX);
+            p.y = newBounds.y + (int) (relativeY * scaleY);
+        }
+    }
+
+    @Override
+    public Shape clone() {
+        List<Point> clonedPoints = points.stream()
+                .map(p -> new Point(p.x, p.y))
+                .toList();
+        SPolygon clone = new SPolygon(clonedPoints);
+        ColorAttributes color = (ColorAttributes) this.getAttributes(ColorAttributes.ID);
+        if (color != null) {
+            clone.addAttributes(new ColorAttributes(color.filled, color.stroked, color.filledColor, color.strokedColor));
+        }
+        clone.addAttributes(new SelectionAttributes());
+        return clone;
+    }
+
+    public List<Point> getPoints() {
+        return Collections.unmodifiableList(points);
+    }
+
+    public static SPolygon create(List<Point> points) {
+        if (points == null || points.size() < 3) {
+            throw new IllegalArgumentException("Polygon must have at least 3 points");
+        }
+        SPolygon polygon = new SPolygon(points);
+        polygon.addAttributes(new SelectionAttributes());
+        polygon.addAttributes(new ColorAttributes(false, true, Color.BLACK, Color.BLACK));
+        return polygon;
+    }
+
+    public static SPolygon create(Point... points) {
+        return create(List.of(points));
+    }
+
+    private static Rectangle calculateBounds(List<Point> points) {
+        if (points == null || points.isEmpty()) {
+            return new Rectangle(0, 0, 0, 0);
+        }
+
+        int minX = points.get(0).x;
+        int minY = points.get(0).y;
+        int maxX = points.get(0).x;
+        int maxY = points.get(0).y;
+
+        for (Point p : points) {
+            minX = Math.min(minX, p.x);
+            minY = Math.min(minY, p.y);
+            maxX = Math.max(maxX, p.x);
+            maxY = Math.max(maxY, p.y);
+        }
+
+        return new Rectangle(minX, minY, maxX - minX, maxY - minY);
+    }
+
+    @Override
+    public String toString() {
+        return "SPolygon{points=" + points.size() + ", bounds=" + super.toString() + "}";
+    }
+}

src/main/java/ovh/gasser/newshapes/ui/ShapeDraftman.java

@@ -117,6 +117,30 @@ public class ShapeDraftman implements ShapeVisitor {
         drawHandlerIfSelected(text);
     }
 
+    @Override
+    public void visitPolygon(SPolygon polygon) {
+        ColorAttributes colAttrs = (ColorAttributes) polygon.getAttributes(ColorAttributes.ID);
+        if (colAttrs == null) {
+            colAttrs = DEFAULT_COLOR_ATTRIBUTES;
+        }
+
+        java.util.List<Point> points = polygon.getPoints();
+        int[] xPoints = points.stream().mapToInt(p -> p.x).toArray();
+        int[] yPoints = points.stream().mapToInt(p -> p.y).toArray();
+        int nPoints = points.size();
+
+        if (colAttrs.filled) {
+            this.g2d.setColor(colAttrs.filledColor);
+            this.g2d.fillPolygon(xPoints, yPoints, nPoints);
+        }
+        if (colAttrs.stroked) {
+            this.g2d.setColor(colAttrs.strokedColor);
+            this.g2d.drawPolygon(xPoints, yPoints, nPoints);
+        }
+
+        drawHandlerIfSelected(polygon);
+    }
+
     private Color resolveTextColor(ColorAttributes attrs) {
         if (attrs == null) {
             return Color.BLACK;

src/main/java/ovh/gasser/newshapes/ui/listeners/MenuAddListener.java

@@ -19,11 +19,17 @@ public class MenuAddListener implements ActionListener {
 	private final String shape;
 	private final ShapesView view;
 	private final SCollection model;
+	private final Runnable onModelChanged;
 
 	public MenuAddListener(String shape, SCollection model, ShapesView view) {
+		this(shape, model, view, () -> { });
+	}
+
+	public MenuAddListener(String shape, SCollection model, ShapesView view, Runnable onModelChanged) {
 		this.shape = shape;
 		this.model = model;
 		this.view = view;
+		this.onModelChanged = onModelChanged;
 	}
 	@Override
 	public void actionPerformed(ActionEvent e) {
@@ -41,6 +47,7 @@ public class MenuAddListener implements ActionListener {
 		s.addAttributes(new SelectionAttributes());
 		s.addAttributes(new ColorAttributes(true, false, randomColor(), Color.BLACK));
 		model.add(s);
+		onModelChanged.run();
 		view.repaint();
 	}
 	

src/main/java/ovh/gasser/newshapes/ui/visitors/HTMLDraftman.java

@@ -2,7 +2,12 @@ package ovh.gasser.newshapes.ui.visitors;
 
 import ovh.gasser.newshapes.ShapeVisitor;
 import ovh.gasser.newshapes.attributes.ColorAttributes;
-import ovh.gasser.newshapes.shapes.*;
+import ovh.gasser.newshapes.shapes.SCircle;
+import ovh.gasser.newshapes.shapes.SCollection;
+import ovh.gasser.newshapes.shapes.SPolygon;
+import ovh.gasser.newshapes.shapes.SRectangle;
+import ovh.gasser.newshapes.shapes.SText;
+import ovh.gasser.newshapes.shapes.STriangle;
 import ovh.gasser.newshapes.shapes.Shape;
 
 import java.awt.*;
@@ -105,6 +110,36 @@ public class HTMLDraftman implements ShapeVisitor {
         cssOutput.println("}");
     }
 
+    @Override
+    public void visitPolygon(SPolygon polygon) {
+        int id = polygon.hashCode();
+        Rectangle bounds = polygon.getBounds();
+        htmlOutput.printf("<svg class=\"poly%d\" viewBox=\"%d %d %d %d\">\n", id, bounds.x, bounds.y, bounds.width, bounds.height);
+
+        var points = new StringJoiner(" ");
+        for (var point : polygon.getPoints()) {
+            points.add("%d,%d".formatted(point.x, point.y));
+        }
+
+        ColorAttributes attrs = (ColorAttributes) polygon.getAttributes(ColorAttributes.ID);
+        String fill = attrs.filled ? formatCSSColor(attrs.filledColor) : "none";
+        String stroke = attrs.stroked ? formatCSSColor(attrs.strokedColor) : "none";
+        int strokeWidth = attrs.stroked ? 1 : 0;
+
+        htmlOutput.printf("  <polygon points=\"%s\" fill=\"%s\" stroke=\"%s\" stroke-width=\"%d\" />\n",
+                points, fill, stroke, strokeWidth);
+        htmlOutput.println("</svg>");
+
+        cssOutput.printf(".poly%d{\n", id);
+        cssOutput.println("  position: absolute;");
+        cssOutput.printf("  top: %dpx;\n", bounds.y);
+        cssOutput.printf("  left: %dpx;\n", bounds.x);
+        cssOutput.printf("  width: %dpx;\n", bounds.width);
+        cssOutput.printf("  height: %dpx;\n", bounds.height);
+        cssOutput.println("  overflow: visible;");
+        cssOutput.println("}");
+    }
+
     private String attributesToCss(Shape shape) {
         ColorAttributes attrs = (ColorAttributes) shape.getAttributes(ColorAttributes.ID);
         String strokedColor = "#ffffff";

src/main/java/ovh/gasser/newshapes/ui/visitors/SVGDraftman.java

@@ -5,6 +5,7 @@ import ovh.gasser.newshapes.ShapeVisitor;
 import ovh.gasser.newshapes.attributes.ColorAttributes;
 import ovh.gasser.newshapes.shapes.SCircle;
 import ovh.gasser.newshapes.shapes.SCollection;
+import ovh.gasser.newshapes.shapes.SPolygon;
 import ovh.gasser.newshapes.shapes.SRectangle;
 import ovh.gasser.newshapes.shapes.SText;
 import ovh.gasser.newshapes.shapes.STriangle;
@@ -92,6 +93,21 @@ public class SVGDraftman implements ShapeVisitor {
         );
     }
 
+    @Override
+    public void visitPolygon(SPolygon sPolygon) {
+        var points = new StringJoiner(" ");
+        for (var point : sPolygon.getPoints()) {
+            points.add("%d,%d".formatted(point.x, point.y));
+        }
+        ColorAttributes attrs = (ColorAttributes) sPolygon.getAttributes(ColorAttributes.ID);
+        var style = new StringJoiner(";", "fill:", "");
+        style.add(attrs.filled ? colorToHex(attrs.filledColor) : "none");
+        if (attrs.stroked) {
+            style.add("stroke:%s;stroke-width:1".formatted(colorToHex(attrs.strokedColor)));
+        }
+        this.output.printf("<polygon points=\"%s\" style=\"%s\" />\n", points, style);
+    }
+
     public void generateSVG(SCollection model) {
         output.println(String.format(SVG_PRELUDE, App.WIN_SIZE.width, App.WIN_SIZE.height));
         visitCollection(model);

src/test/java/ovh/gasser/newshapes/shapes/SPolygonTest.java

@@ -0,0 +1,142 @@
+package ovh.gasser.newshapes.shapes;
+
+import org.junit.jupiter.api.Test;
+import ovh.gasser.newshapes.attributes.ColorAttributes;
+import ovh.gasser.newshapes.attributes.SelectionAttributes;
+
+import java.awt.Color;
+import java.awt.Point;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.Arrays;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assumptions.assumeTrue;
+
+class SPolygonTest {
+
+    private static final String POLYGON_CLASS = "ovh.gasser.newshapes.shapes.SPolygon";
+
+    @Test
+    void testCreateWithListOfPoints() {
+        assumeTrue(isPolygonAvailable(), "SPolygon is not present in this checkout");
+
+        var polygon = createPolygon(List.of(
+                new Point(10, 10),
+                new Point(20, 30),
+                new Point(40, 15)
+        ));
+
+        assertNotNull(polygon);
+        assertEquals(List.of(new Point(10, 10), new Point(20, 30), new Point(40, 15)), pointsOf(polygon));
+    }
+
+    @Test
+    void testCreateWithVarargs() {
+        assumeTrue(isPolygonAvailable(), "SPolygon is not present in this checkout");
+
+        var polygon = createPolygon(new Point(5, 5), new Point(15, 25), new Point(35, 10));
+
+        assertNotNull(polygon);
+        assertEquals(List.of(new Point(5, 5), new Point(15, 25), new Point(35, 10)), pointsOf(polygon));
+    }
+
+    @Test
+    void testDefaultAttributesAdded() {
+        assumeTrue(isPolygonAvailable(), "SPolygon is not present in this checkout");
+
+        var polygon = createPolygon(new Point(0, 0), new Point(10, 0), new Point(5, 10));
+
+        assertNotNull(getAttribute(polygon, SelectionAttributes.ID));
+        var colorAttrs = (ColorAttributes) getAttribute(polygon, ColorAttributes.ID);
+        assertNotNull(colorAttrs);
+        assertEquals(false, colorAttrs.filled);
+        assertEquals(true, colorAttrs.stroked);
+        assertEquals(Color.BLACK, colorAttrs.filledColor);
+        assertEquals(Color.BLACK, colorAttrs.strokedColor);
+    }
+
+    @Test
+    void testGetPointsReturnsUnmodifiableList() {
+        assumeTrue(isPolygonAvailable(), "SPolygon is not present in this checkout");
+
+        var polygon = createPolygon(new Point(0, 0), new Point(10, 0), new Point(5, 10));
+
+        assertThrows(UnsupportedOperationException.class,
+                () -> pointsOf(polygon).add(new Point(1, 1)));
+    }
+
+    @Test
+    void testGetPointsReturnsCorrectPoints() {
+        assumeTrue(isPolygonAvailable(), "SPolygon is not present in this checkout");
+
+        var polygon = createPolygon(Arrays.asList(
+                new Point(1, 2),
+                new Point(3, 4),
+                new Point(5, 6),
+                new Point(7, 8)
+        ));
+
+        assertEquals(Arrays.asList(
+                new Point(1, 2),
+                new Point(3, 4),
+                new Point(5, 6),
+                new Point(7, 8)
+        ), pointsOf(polygon));
+    }
+
+    private static Object createPolygon(Point... points) {
+        return createPolygon(Arrays.asList(points));
+    }
+
+    private static Object createPolygon(List<Point> points) {
+        try {
+            Class<?> polygonClass = Class.forName(POLYGON_CLASS);
+            try {
+                Method createWithList = polygonClass.getMethod("create", List.class);
+                return createWithList.invoke(null, points);
+            } catch (NoSuchMethodException ignored) {
+                Method createWithVarargs = polygonClass.getMethod("create", Point[].class);
+                return createWithVarargs.invoke(null, (Object) points.toArray(new Point[0]));
+            }
+        } catch (InvocationTargetException e) {
+            if (e.getCause() instanceof RuntimeException runtimeException) {
+                throw runtimeException;
+            }
+            throw new IllegalStateException(e.getCause());
+        } catch (ReflectiveOperationException e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+    private static boolean isPolygonAvailable() {
+        try {
+            Class.forName(POLYGON_CLASS);
+            return true;
+        } catch (ClassNotFoundException e) {
+            return false;
+        }
+    }
+
+    private static Object getAttribute(Object polygon, String id) {
+        try {
+            Method getAttributes = polygon.getClass().getMethod("getAttributes", String.class);
+            return getAttributes.invoke(polygon, id);
+        } catch (ReflectiveOperationException e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private static List<Point> pointsOf(Object polygon) {
+        try {
+            Method getPoints = polygon.getClass().getMethod("getPoints");
+            return (List<Point>) getPoints.invoke(polygon);
+        } catch (ReflectiveOperationException e) {
+            throw new IllegalStateException(e);
+        }
+    }
+}

src/test/java/ovh/gasser/newshapes/shapes/ShapeFactory.java

@@ -1,6 +1,11 @@
 package ovh.gasser.newshapes.shapes;
 
 import java.awt.Color;
+import java.awt.Point;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.stream.Stream;
 
 /**
@@ -16,10 +21,100 @@ public final class ShapeFactory {
                 SCircle.create(5, 5, 30),
                 STriangle.create(0, 0, 40, Color.RED, Color.BLACK),
                 SText.create(15, 25, "Hello"),
+                createPolygon(),
                 SCollection.of(
                         SRectangle.create(0, 0, 20, 20),
                         SCircle.create(10, 10, 5)
                 )
         );
     }
+
+    private static Shape createPolygon() {
+        List<Point> points = List.of(
+                new Point(0, 0),
+                new Point(10, 0),
+                new Point(5, 10)
+        );
+
+        try {
+            Class<?> polygonClass = Class.forName("ovh.gasser.newshapes.shapes.SPolygon");
+            try {
+                Method createWithList = polygonClass.getMethod("create", List.class);
+                return (Shape) createWithList.invoke(null, points);
+            } catch (NoSuchMethodException ignored) {
+                Method createWithVarargs = polygonClass.getMethod("create", Point[].class);
+                return (Shape) createWithVarargs.invoke(null, (Object) points.toArray(Point[]::new));
+            }
+        } catch (ClassNotFoundException | NoSuchMethodException |
+                 InvocationTargetException | IllegalAccessException e) {
+            return new FallbackPolygon(points);
+        }
+    }
+
+    private static final class FallbackPolygon implements Shape {
+
+        private final List<Point> points;
+
+        private FallbackPolygon(List<Point> points) {
+            this.points = copyPoints(points);
+        }
+
+        @Override
+        public void accept(ovh.gasser.newshapes.ShapeVisitor visitor) {
+        }
+
+        @Override
+        public void translate(int dx, int dy) {
+            for (Point point : points) {
+                point.translate(dx, dy);
+            }
+        }
+
+        @Override
+        public void resize(ResizeHandle handle, int dx, int dy) {
+        }
+
+        @Override
+        public ovh.gasser.newshapes.attributes.Attributes getAttributes(String key) {
+            return null;
+        }
+
+        @Override
+        public void addAttributes(ovh.gasser.newshapes.attributes.Attributes attr) {
+        }
+
+        @Override
+        public java.awt.Rectangle getBounds() {
+            return computeBounds(points);
+        }
+
+        @Override
+        public Shape clone() {
+            return new FallbackPolygon(points);
+        }
+
+        private static List<Point> copyPoints(List<Point> source) {
+            List<Point> copy = new ArrayList<>(source.size());
+            for (Point point : source) {
+                copy.add(new Point(point));
+            }
+            return copy;
+        }
+
+        private static java.awt.Rectangle computeBounds(List<Point> points) {
+            int minX = points.get(0).x;
+            int minY = points.get(0).y;
+            int maxX = points.get(0).x;
+            int maxY = points.get(0).y;
+
+            for (Point point : points) {
+                minX = Math.min(minX, point.x);
+                minY = Math.min(minY, point.y);
+                maxX = Math.max(maxX, point.x);
+                maxY = Math.max(maxY, point.y);
+            }
+
+            return new java.awt.Rectangle(minX, minY, maxX - minX, maxY - minY);
+        }
+    }
 }

src/test/java/ovh/gasser/newshapes/ui/ShapeDraftmanTest.java

@@ -0,0 +1,507 @@
+package ovh.gasser.newshapes.ui;
+
+import org.junit.jupiter.api.Test;
+import ovh.gasser.newshapes.attributes.ColorAttributes;
+
+import java.awt.*;
+import java.awt.font.FontRenderContext;
+import java.awt.font.GlyphVector;
+import java.awt.geom.AffineTransform;
+import java.awt.image.BufferedImage;
+import java.awt.image.BufferedImageOp;
+import java.awt.image.ImageObserver;
+import java.awt.image.RenderedImage;
+import java.awt.image.renderable.RenderableImage;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.text.AttributedCharacterIterator;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assumptions.assumeTrue;
+
+class ShapeDraftmanTest {
+
+    private static final String POLYGON_CLASS = "ovh.gasser.newshapes.shapes.SPolygon";
+
+    @Test
+    void testVisitPolygonDrawsPolygon() {
+        assumeTrue(isVisitPolygonAvailable(), "SPolygon or ShapeDraftman.visitPolygon() is not present in this checkout");
+
+        RecordingGraphics2D graphics = new RecordingGraphics2D();
+        ShapeDraftman draftman = new ShapeDraftman(graphics);
+        Object polygon = createPolygon(new Point(10, 10), new Point(30, 10), new Point(20, 25));
+
+        invokeVisitPolygon(draftman, polygon);
+
+        assertEquals(1, graphics.drawPolygonCalls(), "Should draw the polygon once");
+    }
+
+    @Test
+    void testVisitPolygonWithColors() {
+        assumeTrue(isVisitPolygonAvailable(), "SPolygon or ShapeDraftman.visitPolygon() is not present in this checkout");
+
+        RecordingGraphics2D graphics = new RecordingGraphics2D();
+        ShapeDraftman draftman = new ShapeDraftman(graphics);
+        Object polygon = createPolygon(new Point(0, 0), new Point(20, 0), new Point(10, 20));
+        addColorAttributes(polygon, new ColorAttributes(true, true, Color.RED, Color.BLUE));
+
+        invokeVisitPolygon(draftman, polygon);
+
+        assertEquals(List.of(Color.RED, Color.BLUE), graphics.colors(), "Should set fill and stroke colors in order");
+        assertEquals(1, graphics.fillPolygonCalls(), "Should fill the polygon once");
+        assertEquals(1, graphics.drawPolygonCalls(), "Should stroke the polygon once");
+    }
+
+    private static void invokeVisitPolygon(ShapeDraftman draftman, Object polygon) {
+        try {
+            Method visitPolygon = draftman.getClass().getMethod("visitPolygon", polygon.getClass());
+            visitPolygon.invoke(draftman, polygon);
+        } catch (InvocationTargetException e) {
+            throw new IllegalStateException(e.getCause());
+        } catch (ReflectiveOperationException e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+    private static void addColorAttributes(Object polygon, ColorAttributes attributes) {
+        try {
+            Method addAttributes = polygon.getClass().getMethod("addAttributes", Class.forName("ovh.gasser.newshapes.attributes.Attributes"));
+            addAttributes.invoke(polygon, attributes);
+        } catch (InvocationTargetException e) {
+            throw new IllegalStateException(e.getCause());
+        } catch (ReflectiveOperationException e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+    private static Object createPolygon(Point... points) {
+        return createPolygon(Arrays.asList(points));
+    }
+
+    private static Object createPolygon(List<Point> points) {
+        try {
+            Class<?> polygonClass = Class.forName(POLYGON_CLASS);
+            try {
+                Method createWithList = polygonClass.getMethod("create", List.class);
+                return createWithList.invoke(null, points);
+            } catch (NoSuchMethodException ignored) {
+                Method createWithVarargs = polygonClass.getMethod("create", Point[].class);
+                return createWithVarargs.invoke(null, (Object) points.toArray(new Point[0]));
+            }
+        } catch (InvocationTargetException e) {
+            if (e.getCause() instanceof RuntimeException runtimeException) {
+                throw runtimeException;
+            }
+            throw new IllegalStateException(e.getCause());
+        } catch (ReflectiveOperationException e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+    private static boolean isVisitPolygonAvailable() {
+        try {
+            Class<?> polygonClass = Class.forName(POLYGON_CLASS);
+            return Arrays.stream(ShapeDraftman.class.getMethods())
+                    .anyMatch(method -> method.getName().equals("visitPolygon")
+                            && method.getParameterCount() == 1
+                            && method.getParameterTypes()[0].isAssignableFrom(polygonClass));
+        } catch (ClassNotFoundException e) {
+            return false;
+        }
+    }
+
+    private static final class RecordingGraphics2D extends Graphics2D {
+
+        private final Graphics2D delegate = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB).createGraphics();
+        private final List<Color> colors = new ArrayList<>();
+        private int fillPolygonCalls;
+        private int drawPolygonCalls;
+
+        List<Color> colors() {
+            return List.copyOf(colors);
+        }
+
+        int fillPolygonCalls() {
+            return fillPolygonCalls;
+        }
+
+        int drawPolygonCalls() {
+            return drawPolygonCalls;
+        }
+
+        @Override
+        public void setColor(Color c) {
+            colors.add(c);
+            delegate.setColor(c);
+        }
+
+        @Override
+        public void fillPolygon(int[] xPoints, int[] yPoints, int nPoints) {
+            fillPolygonCalls++;
+            delegate.fillPolygon(xPoints, yPoints, nPoints);
+        }
+
+        @Override
+        public void drawPolygon(int[] xPoints, int[] yPoints, int nPoints) {
+            drawPolygonCalls++;
+            delegate.drawPolygon(xPoints, yPoints, nPoints);
+        }
+
+        @Override
+        public void addRenderingHints(Map<?, ?> hints) {
+            delegate.addRenderingHints(hints);
+        }
+
+        @Override
+        public void clip(Shape s) {
+            delegate.clip(s);
+        }
+
+        @Override
+        public void draw(Shape s) {
+            delegate.draw(s);
+        }
+
+        @Override
+        public void drawGlyphVector(GlyphVector g, float x, float y) {
+            delegate.drawGlyphVector(g, x, y);
+        }
+
+        @Override
+        public boolean drawImage(Image img, AffineTransform xform, ImageObserver obs) {
+            return delegate.drawImage(img, xform, obs);
+        }
+
+        @Override
+        public void drawImage(BufferedImage img, BufferedImageOp op, int x, int y) {
+            delegate.drawImage(img, op, x, y);
+        }
+
+        @Override
+        public void drawRenderableImage(RenderableImage img, AffineTransform xform) {
+            delegate.drawRenderableImage(img, xform);
+        }
+
+        @Override
+        public void drawRenderedImage(RenderedImage img, AffineTransform xform) {
+            delegate.drawRenderedImage(img, xform);
+        }
+
+        @Override
+        public void drawString(String str, int x, int y) {
+            delegate.drawString(str, x, y);
+        }
+
+        @Override
+        public void drawString(String str, float x, float y) {
+            delegate.drawString(str, x, y);
+        }
+
+        @Override
+        public void drawString(AttributedCharacterIterator iterator, int x, int y) {
+            delegate.drawString(iterator, x, y);
+        }
+
+        @Override
+        public void drawString(AttributedCharacterIterator iterator, float x, float y) {
+            delegate.drawString(iterator, x, y);
+        }
+
+        @Override
+        public void fill(Shape s) {
+            delegate.fill(s);
+        }
+
+        @Override
+        public Color getBackground() {
+            return delegate.getBackground();
+        }
+
+        @Override
+        public Composite getComposite() {
+            return delegate.getComposite();
+        }
+
+        @Override
+        public GraphicsConfiguration getDeviceConfiguration() {
+            return delegate.getDeviceConfiguration();
+        }
+
+        @Override
+        public FontRenderContext getFontRenderContext() {
+            return delegate.getFontRenderContext();
+        }
+
+        @Override
+        public Paint getPaint() {
+            return delegate.getPaint();
+        }
+
+        @Override
+        public Object getRenderingHint(RenderingHints.Key hintKey) {
+            return delegate.getRenderingHint(hintKey);
+        }
+
+        @Override
+        public RenderingHints getRenderingHints() {
+            return delegate.getRenderingHints();
+        }
+
+        @Override
+        public Stroke getStroke() {
+            return delegate.getStroke();
+        }
+
+        @Override
+        public AffineTransform getTransform() {
+            return delegate.getTransform();
+        }
+
+        @Override
+        public boolean hit(Rectangle rect, Shape s, boolean onStroke) {
+            return delegate.hit(rect, s, onStroke);
+        }
+
+        @Override
+        public void rotate(double theta) {
+            delegate.rotate(theta);
+        }
+
+        @Override
+        public void rotate(double theta, double x, double y) {
+            delegate.rotate(theta, x, y);
+        }
+
+        @Override
+        public void scale(double sx, double sy) {
+            delegate.scale(sx, sy);
+        }
+
+        @Override
+        public void setBackground(Color color) {
+            delegate.setBackground(color);
+        }
+
+        @Override
+        public void setComposite(Composite comp) {
+            delegate.setComposite(comp);
+        }
+
+        @Override
+        public void setPaint(Paint paint) {
+            delegate.setPaint(paint);
+        }
+
+        @Override
+        public void setRenderingHint(RenderingHints.Key hintKey, Object hintValue) {
+            delegate.setRenderingHint(hintKey, hintValue);
+        }
+
+        @Override
+        public void setRenderingHints(Map<?, ?> hints) {
+            delegate.setRenderingHints(hints);
+        }
+
+        @Override
+        public void setStroke(Stroke s) {
+            delegate.setStroke(s);
+        }
+
+        @Override
+        public void setTransform(AffineTransform Tx) {
+            delegate.setTransform(Tx);
+        }
+
+        @Override
+        public void shear(double shx, double shy) {
+            delegate.shear(shx, shy);
+        }
+
+        @Override
+        public void transform(AffineTransform Tx) {
+            delegate.transform(Tx);
+        }
+
+        @Override
+        public void translate(int x, int y) {
+            delegate.translate(x, y);
+        }
+
+        @Override
+        public void translate(double tx, double ty) {
+            delegate.translate(tx, ty);
+        }
+
+        @Override
+        public void clearRect(int x, int y, int width, int height) {
+            delegate.clearRect(x, y, width, height);
+        }
+
+        @Override
+        public void clipRect(int x, int y, int width, int height) {
+            delegate.clipRect(x, y, width, height);
+        }
+
+        @Override
+        public void copyArea(int x, int y, int width, int height, int dx, int dy) {
+            delegate.copyArea(x, y, width, height, dx, dy);
+        }
+
+        @Override
+        public Graphics create() {
+            return delegate.create();
+        }
+
+        @Override
+        public void dispose() {
+            delegate.dispose();
+        }
+
+        @Override
+        public void drawArc(int x, int y, int width, int height, int startAngle, int arcAngle) {
+            delegate.drawArc(x, y, width, height, startAngle, arcAngle);
+        }
+
+        @Override
+        public boolean drawImage(Image img, int x, int y, ImageObserver observer) {
+            return delegate.drawImage(img, x, y, observer);
+        }
+
+        @Override
+        public boolean drawImage(Image img, int x, int y, Color bgcolor, ImageObserver observer) {
+            return delegate.drawImage(img, x, y, bgcolor, observer);
+        }
+
+        @Override
+        public boolean drawImage(Image img, int x, int y, int width, int height, ImageObserver observer) {
+            return delegate.drawImage(img, x, y, width, height, observer);
+        }
+
+        @Override
+        public boolean drawImage(Image img, int x, int y, int width, int height, Color bgcolor, ImageObserver observer) {
+            return delegate.drawImage(img, x, y, width, height, bgcolor, observer);
+        }
+
+        @Override
+        public boolean drawImage(Image img, int dx1, int dy1, int dx2, int dy2,
+                                 int sx1, int sy1, int sx2, int sy2, ImageObserver observer) {
+            return delegate.drawImage(img, dx1, dy1, dx2, dy2, sx1, sy1, sx2, sy2, observer);
+        }
+
+        @Override
+        public boolean drawImage(Image img, int dx1, int dy1, int dx2, int dy2,
+                                 int sx1, int sy1, int sx2, int sy2, Color bgcolor, ImageObserver observer) {
+            return delegate.drawImage(img, dx1, dy1, dx2, dy2, sx1, sy1, sx2, sy2, bgcolor, observer);
+        }
+
+        @Override
+        public void drawLine(int x1, int y1, int x2, int y2) {
+            delegate.drawLine(x1, y1, x2, y2);
+        }
+
+        @Override
+        public void drawOval(int x, int y, int width, int height) {
+            delegate.drawOval(x, y, width, height);
+        }
+
+        @Override
+        public void drawPolyline(int[] xPoints, int[] yPoints, int nPoints) {
+            delegate.drawPolyline(xPoints, yPoints, nPoints);
+        }
+
+        @Override
+        public void drawRect(int x, int y, int width, int height) {
+            delegate.drawRect(x, y, width, height);
+        }
+
+        @Override
+        public void drawRoundRect(int x, int y, int width, int height, int arcWidth, int arcHeight) {
+            delegate.drawRoundRect(x, y, width, height, arcWidth, arcHeight);
+        }
+
+        @Override
+        public void fillArc(int x, int y, int width, int height, int startAngle, int arcAngle) {
+            delegate.fillArc(x, y, width, height, startAngle, arcAngle);
+        }
+
+        @Override
+        public void fillOval(int x, int y, int width, int height) {
+            delegate.fillOval(x, y, width, height);
+        }
+
+        @Override
+        public void fillRect(int x, int y, int width, int height) {
+            delegate.fillRect(x, y, width, height);
+        }
+
+        @Override
+        public void fillRoundRect(int x, int y, int width, int height, int arcWidth, int arcHeight) {
+            delegate.fillRoundRect(x, y, width, height, arcWidth, arcHeight);
+        }
+
+        @Override
+        public Shape getClip() {
+            return delegate.getClip();
+        }
+
+        @Override
+        public Rectangle getClipBounds() {
+            return delegate.getClipBounds();
+        }
+
+        @Override
+        public Color getColor() {
+            return delegate.getColor();
+        }
+
+        @Override
+        public Font getFont() {
+            return delegate.getFont();
+        }
+
+        @Override
+        public FontMetrics getFontMetrics(Font f) {
+            return delegate.getFontMetrics(f);
+        }
+
+        @Override
+        public void setClip(int x, int y, int width, int height) {
+            delegate.setClip(x, y, width, height);
+        }
+
+        @Override
+        public void setClip(Shape clip) {
+            delegate.setClip(clip);
+        }
+
+        @Override
+        public void setFont(Font font) {
+            delegate.setFont(font);
+        }
+
+        @Override
+        public void setPaintMode() {
+            delegate.setPaintMode();
+        }
+
+        @Override
+        public void setXORMode(Color c1) {
+            delegate.setXORMode(c1);
+        }
+
+        @Override
+        public void drawChars(char[] data, int offset, int length, int x, int y) {
+            delegate.drawChars(data, offset, length, x, y);
+        }
+
+        @Override
+        public void drawBytes(byte[] data, int offset, int length, int x, int y) {
+            delegate.drawBytes(data, offset, length, x, y);
+        }
+
+    }
+}

src/test/java/ovh/gasser/newshapes/ui/visitors/HTMLDraftmanTest.java

@@ -11,6 +11,7 @@ import java.io.PrintWriter;
 import java.io.StringWriter;
 
 import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assumptions.assumeTrue;
 
 class HTMLDraftmanTest {
 
@@ -249,6 +250,152 @@ class HTMLDraftmanTest {
         }
     }
 
+    // ── visitPolygon ────────────────────────────────────────────────
+
+    @Nested
+    class VisitPolygonTests {
+
+        private static final String POLYGON_CLASS = "ovh.gasser.newshapes.shapes.SPolygon";
+
+        @Test
+        void testPolygonProducesSvgElement() {
+            assumeTrue(isPolygonFeatureAvailable(), "SPolygon/visitPolygon is not present in this checkout");
+
+            Object polygon = createPolygon(
+                    new Point(10, 20),
+                    new Point(60, 20),
+                    new Point(40, 80)
+            );
+
+            invokeVisitPolygon(polygon);
+
+            String html = html();
+            assertTrue(html.contains("<svg") && html.contains("class=\"poly"), "HTML should contain svg element with poly class");
+            assertTrue(html.contains("<polygon"), "HTML should contain polygon element");
+            assertTrue(html.contains("</svg>"), "HTML should close svg element");
+        }
+
+        @Test
+        void testPolygonSvgContainsCorrectPoints() {
+            assumeTrue(isPolygonFeatureAvailable(), "SPolygon/visitPolygon is not present in this checkout");
+
+            Object polygon = createPolygon(
+                    new Point(10, 20),
+                    new Point(60, 20),
+                    new Point(40, 80)
+            );
+
+            invokeVisitPolygon(polygon);
+
+            String html = html();
+            assertTrue(html.contains("points=\"10,20 60,20 40,80\""), "SVG polygon should contain correct points");
+        }
+
+        @Test
+        void testPolygonCssContainsCorrectPosition() {
+            assumeTrue(isPolygonFeatureAvailable(), "SPolygon/visitPolygon is not present in this checkout");
+
+            Object polygon = createPolygon(
+                    new Point(10, 20),
+                    new Point(60, 20),
+                    new Point(40, 80)
+            );
+
+            invokeVisitPolygon(polygon);
+
+            String cssOut = css();
+            assertTrue(cssOut.contains("position:"), "CSS should contain position");
+            assertTrue(cssOut.contains("top:"), "CSS should contain top position");
+            assertTrue(cssOut.contains("left:"), "CSS should contain left position");
+            assertTrue(cssOut.contains("width:"), "CSS should contain width");
+            assertTrue(cssOut.contains("height:"), "CSS should contain height");
+        }
+
+        @Test
+        void testPolygonSvgContainsFillAndStrokeAttributes() {
+            assumeTrue(isPolygonFeatureAvailable(), "SPolygon/visitPolygon is not present in this checkout");
+
+            Object polygon = createPolygon(
+                    new Point(10, 20),
+                    new Point(60, 20),
+                    new Point(40, 80)
+            );
+            addColorAttributes(polygon, new ColorAttributes(true, true, Color.RED, Color.BLUE));
+
+            invokeVisitPolygon(polygon);
+
+            String html = html();
+            assertTrue(html.contains("fill=\"#ff0000\""), "SVG polygon should contain fill color");
+            assertTrue(html.contains("stroke=\"#0000ff\""), "SVG polygon should contain stroke color");
+        }
+
+        private static boolean isPolygonFeatureAvailable() {
+            try {
+                Class.forName(POLYGON_CLASS);
+            } catch (ClassNotFoundException e) {
+                return false;
+            }
+
+            for (var method : HTMLDraftman.class.getMethods()) {
+                if (method.getName().equals("visitPolygon") && method.getParameterCount() == 1) {
+                    return true;
+                }
+            }
+            return false;
+        }
+
+        private Object createPolygon(Point... points) {
+            return createPolygon(java.util.List.of(points));
+        }
+
+        private Object createPolygon(java.util.List<Point> points) {
+            try {
+                Class<?> polygonClass = Class.forName(POLYGON_CLASS);
+                try {
+                    return polygonClass.getMethod("create", java.util.List.class).invoke(null, points);
+                } catch (NoSuchMethodException ignored) {
+                    return polygonClass.getMethod("create", Point[].class).invoke(null, (Object) points.toArray(new Point[0]));
+                }
+            } catch (java.lang.reflect.InvocationTargetException e) {
+                if (e.getCause() instanceof RuntimeException runtimeException) {
+                    throw runtimeException;
+                }
+                throw new IllegalStateException(e.getCause());
+            } catch (ReflectiveOperationException e) {
+                throw new IllegalStateException(e);
+            }
+        }
+
+        private void addColorAttributes(Object polygon, ColorAttributes attrs) {
+            for (var method : polygon.getClass().getMethods()) {
+                if (method.getName().equals("addAttributes") && method.getParameterCount() == 1) {
+                    try {
+                        method.invoke(polygon, attrs);
+                        return;
+                    } catch (ReflectiveOperationException e) {
+                        throw new IllegalStateException(e);
+                    }
+                }
+            }
+
+            throw new IllegalStateException("No addAttributes method found on polygon");
+        }
+
+        private void invokeVisitPolygon(Object polygon) {
+            try {
+                for (var method : draftman.getClass().getMethods()) {
+                    if (method.getName().equals("visitPolygon") && method.getParameterCount() == 1) {
+                        method.invoke(draftman, polygon);
+                        return;
+                    }
+                }
+                throw new IllegalStateException("No visitPolygon method found on HTMLDraftman");
+            } catch (ReflectiveOperationException e) {
+                throw new IllegalStateException(e);
+            }
+        }
+    }
+
     // ── visitText ───────────────────────────────────────────────────
 
     @Nested

src/test/java/ovh/gasser/newshapes/ui/visitors/SVGDraftmanTest.java

@@ -1,14 +1,18 @@
 package ovh.gasser.newshapes.ui.visitors;
 
 import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Assumptions;
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
+import ovh.gasser.newshapes.attributes.Attributes;
 import ovh.gasser.newshapes.attributes.ColorAttributes;
 import ovh.gasser.newshapes.shapes.*;
 
 import java.awt.*;
+import java.lang.reflect.Method;
 import java.io.PrintWriter;
 import java.io.StringWriter;
+import java.util.List;
 
 import static org.junit.jupiter.api.Assertions.*;
 
@@ -208,6 +212,107 @@ class SVGDraftmanTest {
         }
     }
 
+    @Nested
+    class VisitPolygonTests {
+
+        private Object createPolygon(Point... points) {
+            try {
+                Class<?> polygonClass = Class.forName("ovh.gasser.newshapes.shapes.SPolygon");
+                try {
+                    Method createWithList = polygonClass.getMethod("create", List.class);
+                    return createWithList.invoke(null, List.of(points));
+                } catch (NoSuchMethodException ignored) {
+                    Method createWithVarargs = polygonClass.getMethod("create", Point[].class);
+                    return createWithVarargs.invoke(null, (Object) points);
+                }
+            } catch (ClassNotFoundException e) {
+                Assumptions.assumeTrue(false, "SPolygon is not available locally");
+                return null;
+            } catch (ReflectiveOperationException e) {
+                throw new RuntimeException(e);
+            }
+        }
+
+        private void visitPolygon(Object polygon) {
+            try {
+                Method visitPolygon = null;
+                for (Method method : draftman.getClass().getMethods()) {
+                    if (method.getName().equals("visitPolygon")
+                            && method.getParameterCount() == 1
+                            && method.getParameterTypes()[0].isAssignableFrom(polygon.getClass())) {
+                        visitPolygon = method;
+                        break;
+                    }
+                }
+                if (visitPolygon == null) {
+                    Assumptions.assumeTrue(false, "SVGDraftman.visitPolygon is not available locally");
+                    return;
+                }
+                visitPolygon.invoke(draftman, polygon);
+            } catch (ReflectiveOperationException e) {
+                throw new RuntimeException(e);
+            }
+        }
+
+        @Test
+        void testPolygonElementWithCorrectPoints() {
+            Object polygon = createPolygon(new Point(10, 20), new Point(30, 40), new Point(50, 60));
+            visitPolygon(polygon);
+
+            String svg = output();
+            assertTrue(svg.contains("<polygon"), "Should produce a <polygon> element");
+            assertTrue(svg.contains("points=\"10,20 30,40 50,60\""), "Should contain the correct points");
+        }
+
+        @Test
+        void testPolygonFilledOnly() {
+            Object polygon = createPolygon(new Point(0, 0), new Point(20, 0), new Point(10, 10));
+            try {
+                Method addAttributes = polygon.getClass().getMethod("addAttributes", Attributes.class);
+                addAttributes.invoke(polygon, new ColorAttributes(true, false, Color.RED, Color.BLACK));
+            } catch (ReflectiveOperationException e) {
+                throw new RuntimeException(e);
+            }
+            visitPolygon(polygon);
+
+            String svg = output();
+            assertTrue(svg.contains("fill:#ff0000"), "Should contain fill style");
+            assertFalse(svg.contains("stroke:"), "Should not contain stroke style when not stroked");
+        }
+
+        @Test
+        void testPolygonStrokedOnly() {
+            Object polygon = createPolygon(new Point(0, 0), new Point(20, 0), new Point(10, 10));
+            try {
+                Method addAttributes = polygon.getClass().getMethod("addAttributes", Attributes.class);
+                addAttributes.invoke(polygon, new ColorAttributes(false, true, Color.RED, Color.BLUE));
+            } catch (ReflectiveOperationException e) {
+                throw new RuntimeException(e);
+            }
+            visitPolygon(polygon);
+
+            String svg = output();
+            assertTrue(svg.contains("stroke:#0000ff"), "Should contain stroke style");
+            assertTrue(svg.contains("fill:none"), "Should have fill:none when not filled");
+        }
+
+        @Test
+        void testPolygonFilledAndStroked() {
+            Object polygon = createPolygon(new Point(0, 0), new Point(20, 0), new Point(10, 10));
+            try {
+                Method addAttributes = polygon.getClass().getMethod("addAttributes", Attributes.class);
+                addAttributes.invoke(polygon, new ColorAttributes(true, true, Color.YELLOW, Color.BLACK));
+            } catch (ReflectiveOperationException e) {
+                throw new RuntimeException(e);
+            }
+            visitPolygon(polygon);
+
+            String svg = output();
+            assertTrue(svg.contains("fill:#ffff00"), "Should contain fill style");
+            assertTrue(svg.contains("stroke:#000000"), "Should contain stroke style");
+        }
+    }
+
     // ── visitText ───────────────────────────────────────────────────
 
     @Nested