test: add contains(Point) hit-testing tests for all shapes

Add 36 tests covering bounds-based hit-testing (getBounds().contains(Point))
for SRectangle, SCircle, STriangle, SText, and SCollection:
- Point inside, outside, on boundary (inclusive top-left, exclusive bottom-right)
- Point after translate to verify position update
- SCollection union bounds, gap between children, single-child bounds

Closes #11

.envrc

@@ -1 +0,0 @@
-use flake

README.md

@@ -1,54 +0,0 @@
-# new-shapes
-
-A shape editor desktop application built with Java Swing. Supports rectangles, circles, triangles, text, shape collections, resize handles, and export to HTML/SVG.
-
-## Prerequisites
-
-- JDK >= 16 (project targets Java 16)
-- A graphical display (X11/Wayland) since this is a Swing GUI application
-
-## Bootstrap
-
-### With Nix (recommended)
-
-If you have [direnv](https://direnv.net/) installed, the environment activates automatically:
-
-```sh
-direnv allow   # one-time, then auto-activates on cd
-```
-
-Otherwise, enter the dev shell manually:
-
-```sh
-nix develop
-```
-
-Both provide JDK 17 and Maven 3.9.x preconfigured. No other setup needed.
-
-### Without Nix
-
-Install JDK 16+ and use the bundled Maven wrapper — no separate Maven installation required:
-
-```sh
-./mvnw --version   # downloads Maven 3.9.12 on first run
-```
-
-## Run the application
-
-```sh
-./mvnw compile exec:java -Dexec.mainClass="ovh.gasser.newshapes.App"
-```
-
-## Run tests
-
-```sh
-./mvnw test
-```
-
-To run the full verification pipeline (compile, test, JaCoCo coverage check with 50% minimum line coverage):
-
-```sh
-./mvnw verify
-```
-
-Coverage reports are generated in `target/site/jacoco/`.

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

flake.lock

@@ -1,27 +0,0 @@
-{
-  "nodes": {
-    "nixpkgs": {
-      "locked": {
-        "lastModified": 1774386573,
-        "narHash": "sha256-4hAV26quOxdC6iyG7kYaZcM3VOskcPUrdCQd/nx8obc=",
-        "owner": "nixos",
-        "repo": "nixpkgs",
-        "rev": "46db2e09e1d3f113a13c0d7b81e2f221c63b8ce9",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nixos",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "root": {
-      "inputs": {
-        "nixpkgs": "nixpkgs"
-      }
-    }
-  },
-  "root": "root",
-  "version": 7
-}

flake.nix

@@ -1,48 +0,0 @@
-{
-  description = "new-shapes - Java Swing shape editor";
-
-  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
-
-  outputs = { self, nixpkgs }:
-    let
-      # JDK 16 (project target) is non-LTS and unavailable in nixpkgs.
-      # JDK 17 (LTS) is fully backward-compatible with --source 16 --target 16.
-      javaVersion = 17;
-
-      supportedSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
-
-      forEachSystem = f:
-        nixpkgs.lib.genAttrs supportedSystems (system: f {
-          pkgs = import nixpkgs {
-            inherit system;
-            overlays = [ self.overlays.default ];
-          };
-        });
-    in
-    {
-      overlays.default = final: prev:
-        let
-          jdk = prev."jdk${toString javaVersion}";
-        in
-        {
-          inherit jdk;
-          # Override Maven to use the same JDK version
-          maven = prev.maven.override { jdk_headless = jdk; };
-        };
-
-      devShells = forEachSystem ({ pkgs }: {
-        default = pkgs.mkShell {
-          packages = with pkgs; [
-            jdk
-            maven
-          ];
-
-          shellHook = ''
-            echo "new-shapes dev shell"
-            echo "  Java: $(java -version 2>&1 | head -1)"
-            echo "  Maven: $(mvn -version 2>&1 | head -1)"
-          '';
-        };
-      });
-    };
-}

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

@@ -57,7 +57,7 @@ public class SText extends AbstractShape {
     }
 
     public void updateMeasuredBounds(int width, int height) {
-        getBounds().setSize(Math.max(width, 0), Math.max(height, 0));
+        bounds.setSize(Math.max(width, 0), Math.max(height, 0));
     }
 
     @Override

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

@@ -0,0 +1,387 @@
+package ovh.gasser.newshapes.shapes;
+
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+
+import java.awt.Color;
+import java.awt.Point;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * Tests bounds-based hit-testing for all shape types.
+ * Hit-testing is performed via {@code shape.getBounds().contains(Point)},
+ * delegating to {@link java.awt.Rectangle#contains(Point)}.
+ *
+ * <p>Note on {@link java.awt.Rectangle#contains} boundary semantics:
+ * A rectangle {@code (x, y, w, h)} contains a point {@code (px, py)} when:
+ * {@code x <= px < x+w} and {@code y <= py < y+h}.
+ * The top-left corner is <em>inclusive</em>; the bottom-right corner is <em>exclusive</em>.
+ */
+class ContainsPointTest {
+
+    // -----------------------------------------------------------------------
+    // SRectangle — bounds = (x, y, width, height)
+    // -----------------------------------------------------------------------
+
+    @Nested
+    class SRectangleContainsPoint {
+
+        // Shape: origin (10, 20), size 80×60  →  right-exclusive: x=90, y=80
+        private final SRectangle rect = SRectangle.create(10, 20, 80, 60);
+
+        @Test
+        void pointInsideShouldBeContained() {
+            Point inside = new Point(50, 50);
+            assertTrue(rect.getBounds().contains(inside),
+                    "A point clearly inside the rectangle should be contained");
+        }
+
+        @Test
+        void pointOutsideShouldNotBeContained() {
+            Point outside = new Point(5, 5);
+            assertFalse(rect.getBounds().contains(outside),
+                    "A point outside the rectangle should not be contained");
+        }
+
+        @Test
+        void pointFarOutsideShouldNotBeContained() {
+            Point farOutside = new Point(200, 300);
+            assertFalse(rect.getBounds().contains(farOutside),
+                    "A point far outside the rectangle should not be contained");
+        }
+
+        @Test
+        void topLeftCornerShouldBeContained() {
+            // Rectangle.contains is inclusive of the top-left corner
+            Point topLeft = new Point(10, 20);
+            assertTrue(rect.getBounds().contains(topLeft),
+                    "The top-left corner (inclusive boundary) should be contained");
+        }
+
+        @Test
+        void bottomRightCornerShouldNotBeContained() {
+            // Rectangle.contains is exclusive of the bottom-right corner
+            Point bottomRight = new Point(90, 80); // x + width, y + height
+            assertFalse(rect.getBounds().contains(bottomRight),
+                    "The bottom-right corner (exclusive boundary) should not be contained");
+        }
+
+        @Test
+        void pointJustInsideBottomRightShouldBeContained() {
+            Point justInside = new Point(89, 79); // one pixel before exclusive boundary
+            assertTrue(rect.getBounds().contains(justInside),
+                    "A point one pixel before the bottom-right boundary should be contained");
+        }
+
+        @Test
+        void pointAfterTranslateShouldBeAtNewPosition() {
+            SRectangle moved = SRectangle.create(10, 20, 80, 60);
+            moved.translate(30, 40); // new bounds: (40, 60, 80, 60)
+
+            Point oldCenter = new Point(50, 50);
+            assertFalse(moved.getBounds().contains(oldCenter),
+                    "After translate, old center should no longer be contained");
+
+            Point newCenter = new Point(80, 90);
+            assertTrue(moved.getBounds().contains(newCenter),
+                    "After translate, a point at the new center should be contained");
+        }
+
+        @Test
+        void pointOnTopEdgeShouldBeContained() {
+            Point topEdge = new Point(50, 20); // y == rect.y, inside x range
+            assertTrue(rect.getBounds().contains(topEdge),
+                    "A point on the top edge should be contained");
+        }
+
+        @Test
+        void pointOnLeftEdgeShouldBeContained() {
+            Point leftEdge = new Point(10, 50); // x == rect.x, inside y range
+            assertTrue(rect.getBounds().contains(leftEdge),
+                    "A point on the left edge should be contained");
+        }
+
+        @Test
+        void pointOnRightEdgeShouldNotBeContained() {
+            Point rightEdge = new Point(90, 50); // x == rect.x + rect.width (exclusive)
+            assertFalse(rect.getBounds().contains(rightEdge),
+                    "A point exactly on the right edge (exclusive) should not be contained");
+        }
+
+        @Test
+        void pointOnBottomEdgeShouldNotBeContained() {
+            Point bottomEdge = new Point(50, 80); // y == rect.y + rect.height (exclusive)
+            assertFalse(rect.getBounds().contains(bottomEdge),
+                    "A point exactly on the bottom edge (exclusive) should not be contained");
+        }
+    }
+
+    // -----------------------------------------------------------------------
+    // SCircle — bounds = (x, y, radius*2, radius*2)
+    // -----------------------------------------------------------------------
+
+    @Nested
+    class SCircleContainsPoint {
+
+        // Shape: origin (20, 30), radius=40  →  bounds (20, 30, 80, 80)
+        // right-exclusive corner: (100, 110)
+        private final SCircle circle = SCircle.create(20, 30, 40);
+
+        @Test
+        void pointInsideBoundsShouldBeContained() {
+            Point inside = new Point(60, 70);
+            assertTrue(circle.getBounds().contains(inside),
+                    "A point inside the bounding box should be contained");
+        }
+
+        @Test
+        void pointOutsideBoundsShouldNotBeContained() {
+            Point outside = new Point(10, 10);
+            assertFalse(circle.getBounds().contains(outside),
+                    "A point outside the bounding box should not be contained");
+        }
+
+        @Test
+        void topLeftCornerShouldBeContained() {
+            Point topLeft = new Point(20, 30);
+            assertTrue(circle.getBounds().contains(topLeft),
+                    "The top-left corner of the bounding box (inclusive) should be contained");
+        }
+
+        @Test
+        void bottomRightCornerShouldNotBeContained() {
+            Point bottomRight = new Point(100, 110); // x + 2r, y + 2r
+            assertFalse(circle.getBounds().contains(bottomRight),
+                    "The bottom-right corner of the bounding box (exclusive) should not be contained");
+        }
+
+        @Test
+        void pointAfterTranslateShouldBeAtNewPosition() {
+            SCircle moved = SCircle.create(20, 30, 40);
+            moved.translate(50, 50); // new bounds: (70, 80, 80, 80)
+
+            Point oldCenter = new Point(60, 70);
+            assertFalse(moved.getBounds().contains(oldCenter),
+                    "After translate, old center should no longer be contained");
+
+            Point newCenter = new Point(110, 120);
+            assertTrue(moved.getBounds().contains(newCenter),
+                    "After translate, a point at the new center should be contained");
+        }
+    }
+
+    // -----------------------------------------------------------------------
+    // STriangle — bounds = (x, y, size, size)
+    // -----------------------------------------------------------------------
+
+    @Nested
+    class STriangleContainsPoint {
+
+        // Shape: origin (5, 15), size=60  →  bounds (5, 15, 60, 60)
+        // right-exclusive corner: (65, 75)
+        private final STriangle triangle = STriangle.create(5, 15, 60, Color.RED, Color.BLACK);
+
+        @Test
+        void pointInsideBoundsShouldBeContained() {
+            Point inside = new Point(35, 45);
+            assertTrue(triangle.getBounds().contains(inside),
+                    "A point inside the bounding box should be contained");
+        }
+
+        @Test
+        void pointOutsideBoundsShouldNotBeContained() {
+            Point outside = new Point(0, 0);
+            assertFalse(triangle.getBounds().contains(outside),
+                    "A point outside the bounding box should not be contained");
+        }
+
+        @Test
+        void topLeftCornerShouldBeContained() {
+            Point topLeft = new Point(5, 15);
+            assertTrue(triangle.getBounds().contains(topLeft),
+                    "The top-left corner of the bounding box (inclusive) should be contained");
+        }
+
+        @Test
+        void bottomRightCornerShouldNotBeContained() {
+            Point bottomRight = new Point(65, 75); // x + size, y + size
+            assertFalse(triangle.getBounds().contains(bottomRight),
+                    "The bottom-right corner of the bounding box (exclusive) should not be contained");
+        }
+
+        @Test
+        void pointAfterTranslateShouldBeAtNewPosition() {
+            STriangle moved = STriangle.create(5, 15, 60, Color.RED, Color.BLACK);
+            moved.translate(100, 100); // new bounds: (105, 115, 60, 60)
+
+            Point oldCenter = new Point(35, 45);
+            assertFalse(moved.getBounds().contains(oldCenter),
+                    "After translate, old center should no longer be contained");
+
+            Point newCenter = new Point(135, 145);
+            assertTrue(moved.getBounds().contains(newCenter),
+                    "After translate, a point at the new center should be contained");
+        }
+    }
+
+    // -----------------------------------------------------------------------
+    // SText — bounds = (x, y, 100, 20)
+    // -----------------------------------------------------------------------
+
+    @Nested
+    class STextContainsPoint {
+
+        // Shape: origin (50, 100)  →  bounds (50, 100, 100, 20)
+        // right-exclusive corner: (150, 120)
+        private final SText text = SText.create(50, 100, "Hello");
+
+        @Test
+        void pointInsideBoundsShouldBeContained() {
+            Point inside = new Point(100, 110);
+            assertTrue(text.getBounds().contains(inside),
+                    "A point inside the default text bounding box should be contained");
+        }
+
+        @Test
+        void pointOutsideBoundsShouldNotBeContained() {
+            Point outside = new Point(10, 10);
+            assertFalse(text.getBounds().contains(outside),
+                    "A point outside the text bounding box should not be contained");
+        }
+
+        @Test
+        void topLeftCornerShouldBeContained() {
+            Point topLeft = new Point(50, 100);
+            assertTrue(text.getBounds().contains(topLeft),
+                    "The top-left corner of the text bounding box (inclusive) should be contained");
+        }
+
+        @Test
+        void bottomRightCornerShouldNotBeContained() {
+            // Default bounds width=100, height=20  →  exclusive corner at (150, 120)
+            Point bottomRight = new Point(150, 120);
+            assertFalse(text.getBounds().contains(bottomRight),
+                    "The bottom-right corner of the text bounding box (exclusive) should not be contained");
+        }
+
+        @Test
+        void pointJustBeforeBottomRightShouldBeContained() {
+            Point justInside = new Point(149, 119);
+            assertTrue(text.getBounds().contains(justInside),
+                    "A point one pixel before the exclusive bottom-right boundary should be contained");
+        }
+
+        @Test
+        void pointAfterTranslateShouldBeAtNewPosition() {
+            // Original bounds: (50, 100, 100, 20) — covers x∈[50,150), y∈[100,120)
+            SText moved = SText.create(50, 100, "Hello");
+            moved.translate(-40, 10); // new bounds: (10, 110, 100, 20) — covers x∈[10,110), y∈[110,130)
+
+            // (130, 105) was inside original bounds but is now outside (x=130 >= 110, y=105 < 110)
+            Point oldPosition = new Point(130, 105);
+            assertFalse(moved.getBounds().contains(oldPosition),
+                    "After translate, a point that was in the old bounds should no longer be contained");
+
+            // (50, 115) is inside new bounds: x∈[10,110), y∈[110,130) ✓
+            Point newPosition = new Point(50, 115);
+            assertTrue(moved.getBounds().contains(newPosition),
+                    "After translate, a point in the new bounds should be contained");
+        }
+
+        @Test
+        void blankTextUsesDefaultPlaceholderAndSameBounds() {
+            // Even blank/null text falls back to the placeholder — bounds remain (x, y, 100, 20)
+            SText blankText = SText.create(0, 0, "");
+            Point inside = new Point(50, 10);
+            assertTrue(blankText.getBounds().contains(inside),
+                    "Blank text still uses default bounds; interior point should be contained");
+        }
+    }
+
+    // -----------------------------------------------------------------------
+    // SCollection — bounds = union of children bounds
+    // -----------------------------------------------------------------------
+
+    @Nested
+    class SCollectionContainsPoint {
+
+        // Two non-overlapping children:
+        //   rect1: (10, 10, 50, 50)  →  covers x∈[10,60), y∈[10,60)
+        //   rect2: (100, 100, 40, 40) →  covers x∈[100,140), y∈[100,140)
+        // Union bounds: (10, 10, 130, 130) →  exclusive corner: (140, 140)
+        private final SRectangle child1 = SRectangle.create(10, 10, 50, 50);
+        private final SRectangle child2 = SRectangle.create(100, 100, 40, 40);
+        private final SCollection collection = SCollection.of(child1, child2);
+
+        @Test
+        void pointInsideFirstChildBoundsShouldBeContained() {
+            Point insideChild1 = new Point(30, 30);
+            assertTrue(collection.getBounds().contains(insideChild1),
+                    "A point inside the first child's bounds is within the union and should be contained");
+        }
+
+        @Test
+        void pointInsideSecondChildBoundsShouldBeContained() {
+            Point insideChild2 = new Point(120, 120);
+            assertTrue(collection.getBounds().contains(insideChild2),
+                    "A point inside the second child's bounds is within the union and should be contained");
+        }
+
+        @Test
+        void pointInGapBetweenChildrenShouldBeContained() {
+            // The union rectangle spans the gap between the two children
+            Point inGap = new Point(70, 70);
+            assertTrue(collection.getBounds().contains(inGap),
+                    "A point in the gap between children is still inside the union bounds and should be contained");
+        }
+
+        @Test
+        void pointOutsideUnionShouldNotBeContained() {
+            Point outside = new Point(0, 0);
+            assertFalse(collection.getBounds().contains(outside),
+                    "A point outside the union bounds should not be contained");
+        }
+
+        @Test
+        void topLeftCornerOfUnionShouldBeContained() {
+            // Union top-left = (10, 10) — inclusive
+            Point topLeft = new Point(10, 10);
+            assertTrue(collection.getBounds().contains(topLeft),
+                    "The top-left corner of the union bounds (inclusive) should be contained");
+        }
+
+        @Test
+        void bottomRightCornerOfUnionShouldNotBeContained() {
+            // Union: x=10, y=10, w=130, h=130 → exclusive corner (140, 140)
+            Point bottomRight = new Point(140, 140);
+            assertFalse(collection.getBounds().contains(bottomRight),
+                    "The bottom-right corner of the union bounds (exclusive) should not be contained");
+        }
+
+        @Test
+        void pointAfterTranslatingChildrenShouldBeAtNewPosition() {
+            SRectangle movableChild = SRectangle.create(0, 0, 30, 30);
+            SCollection movable = SCollection.of(movableChild);
+
+            movable.translate(50, 50); // child now at (50, 50, 30, 30)
+
+            Point oldPoint = new Point(15, 15);
+            assertFalse(movable.getBounds().contains(oldPoint),
+                    "After translate, a point at the old location should not be contained");
+
+            Point newPoint = new Point(65, 65);
+            assertTrue(movable.getBounds().contains(newPoint),
+                    "After translate, a point at the new location should be contained");
+        }
+
+        @Test
+        void singleChildCollectionBoundsMatchChildBounds() {
+            SRectangle only = SRectangle.create(5, 5, 20, 20);
+            SCollection single = SCollection.of(only);
+
+            assertEquals(only.getBounds(), single.getBounds(),
+                    "A single-child collection's bounds should equal the child's own bounds");
+        }
+    }
+}

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

@@ -0,0 +1,223 @@
+package ovh.gasser.newshapes.shapes;
+
+import ovh.gasser.newshapes.App;
+import ovh.gasser.newshapes.attributes.SelectionAttributes;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+
+import java.awt.*;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class EdgeCaseTest {
+
+    // -------------------------------------------------------------------------
+    // NegativeCoordinates
+    // -------------------------------------------------------------------------
+
+    @Nested
+    class NegativeCoordinates {
+
+        @Test
+        void rectangleAtNegativeCoordsShouldPreserveBounds() {
+            SRectangle rect = SRectangle.create(-10, -20, 50, 50);
+            Rectangle bounds = rect.getBounds();
+            assertEquals(-10, bounds.x,      "x should be -10");
+            assertEquals(-20, bounds.y,      "y should be -20");
+            assertEquals(50,  bounds.width,  "width should be 50");
+            assertEquals(50,  bounds.height, "height should be 50");
+        }
+
+        @Test
+        void circleAtNegativeCoordsShouldPreserveBounds() {
+            SCircle circle = SCircle.create(-30, -40, 25);
+            Rectangle bounds = circle.getBounds();
+            assertEquals(-30, bounds.x,      "x should be -30");
+            assertEquals(-40, bounds.y,      "y should be -40");
+            assertEquals(50,  bounds.width,  "width should be radius*2 = 50");
+            assertEquals(50,  bounds.height, "height should be radius*2 = 50");
+        }
+
+        @Test
+        void triangleAtNegativeCoordsShouldPreserveBounds() {
+            STriangle tri = STriangle.create(-5, -15, 60, Color.RED, Color.BLACK);
+            Rectangle bounds = tri.getBounds();
+            assertEquals(-5,  bounds.x,      "x should be -5");
+            assertEquals(-15, bounds.y,      "y should be -15");
+            assertEquals(60,  bounds.width,  "width should be 60");
+            assertEquals(60,  bounds.height, "height should be 60");
+        }
+
+        @Test
+        void translateToNegativePositionShouldUpdateBoundsCorrectly() {
+            SRectangle rect = SRectangle.create(10, 20, 80, 40);
+            rect.translate(-50, -70);
+            Rectangle bounds = rect.getBounds();
+            assertEquals(-40, bounds.x, "x after translate should be -40");
+            assertEquals(-50, bounds.y, "y after translate should be -50");
+            // dimensions must be unchanged
+            assertEquals(80, bounds.width,  "width must remain 80 after translate");
+            assertEquals(40, bounds.height, "height must remain 40 after translate");
+        }
+    }
+
+    // -------------------------------------------------------------------------
+    // ZeroDimensions
+    // -------------------------------------------------------------------------
+
+    @Nested
+    class ZeroDimensions {
+
+        @Test
+        void rectangleWithZeroWidthShouldReturnZeroWidthFromFactory() {
+            SRectangle rect = SRectangle.create(0, 0, 0, 50);
+            assertEquals(0, rect.getBounds().width,
+                    "factory should allow zero width without clamping");
+        }
+
+        @Test
+        void rectangleWithZeroHeightShouldReturnZeroHeightFromFactory() {
+            SRectangle rect = SRectangle.create(0, 0, 50, 0);
+            assertEquals(0, rect.getBounds().height,
+                    "factory should allow zero height without clamping");
+        }
+
+        @Test
+        void circleWithZeroRadiusShouldHaveZeroBoundsDimensions() {
+            SCircle circle = SCircle.create(5, 10, 0);
+            assertEquals(0, circle.getRadius(),        "radius should be 0");
+            assertEquals(0, circle.getBounds().width,  "bounds width should be 0 (radius*2)");
+            assertEquals(0, circle.getBounds().height, "bounds height should be 0 (radius*2)");
+        }
+    }
+
+    // -------------------------------------------------------------------------
+    // ResizeClamping
+    // -------------------------------------------------------------------------
+
+    @Nested
+    class ResizeClamping {
+
+        @Test
+        void rectangleResizedToNegativeShouldClampWidthToOne() {
+            // Start with a 10x10 rect and drag the E handle far to the left
+            SRectangle rect = SRectangle.create(0, 0, 10, 10);
+            rect.resize(ResizeHandle.E, -200, 0);
+            assertTrue(rect.getBounds().width >= 1,
+                    "width must be clamped to a minimum of 1 after negative resize");
+            assertEquals(1, rect.getBounds().width,
+                    "width should be exactly 1 after extreme negative resize on E handle");
+        }
+
+        @Test
+        void rectangleResizedToNegativeShouldClampHeightToOne() {
+            SRectangle rect = SRectangle.create(0, 0, 10, 10);
+            rect.resize(ResizeHandle.S, 0, -200);
+            assertTrue(rect.getBounds().height >= 1,
+                    "height must be clamped to a minimum of 1 after negative resize");
+            assertEquals(1, rect.getBounds().height,
+                    "height should be exactly 1 after extreme negative resize on S handle");
+        }
+
+        @Test
+        void circleResizedToNegativeShouldClampToTwo() {
+            SCircle circle = SCircle.create(0, 0, 50);
+            // Drag E handle far to the left → shrink
+            circle.resize(ResizeHandle.E, -500, 0);
+            assertTrue(circle.getBounds().width >= 2,
+                    "circle width must be clamped to a minimum of 2");
+            assertTrue(circle.getBounds().height >= 2,
+                    "circle height must be clamped to a minimum of 2");
+            assertEquals(2, circle.getBounds().width,
+                    "circle width should be exactly 2 after extreme negative resize");
+            assertEquals(2, circle.getBounds().height,
+                    "circle height should be exactly 2 after extreme negative resize");
+        }
+    }
+
+    // -------------------------------------------------------------------------
+    // NullHandling
+    // -------------------------------------------------------------------------
+
+    @Nested
+    class NullHandling {
+
+        @Test
+        void textCreatedWithNullShouldReturnPlaceholder() {
+            SText text = SText.create(0, 0, null);
+            assertEquals(SText.PLACEHOLDER_TEXT, text.getText(),
+                    "null input should be normalized to the placeholder text");
+        }
+
+        @Test
+        void textCreatedWithBlankStringShouldReturnPlaceholder() {
+            SText text = SText.create(0, 0, "   ");
+            assertEquals(SText.PLACEHOLDER_TEXT, text.getText(),
+                    "blank string input should be normalized to the placeholder text");
+        }
+
+        @Test
+        void getAttributesWithUnknownKeyShouldReturnNull() {
+            SRectangle rect = SRectangle.create(0, 0, 50, 50);
+            assertNull(rect.getAttributes("NONEXISTENT"),
+                    "getAttributes() with an unknown key must return null");
+        }
+
+        @Test
+        void emptyCollectionCreationShouldNotThrow() {
+            assertDoesNotThrow(() -> SCollection.of(),
+                    "SCollection.of() with no arguments must not throw");
+        }
+
+        @Test
+        void emptyCollectionGetBoundsShouldReturnWindowSize() {
+            SCollection collection = SCollection.of();
+            Rectangle bounds = collection.getBounds();
+            assertNotNull(bounds, "getBounds() on empty collection must not return null");
+            assertEquals(App.WIN_SIZE.width,  bounds.width,
+                    "empty collection bounds width should equal WIN_SIZE.width");
+            assertEquals(App.WIN_SIZE.height, bounds.height,
+                    "empty collection bounds height should equal WIN_SIZE.height");
+        }
+    }
+
+    // -------------------------------------------------------------------------
+    // LargeValues
+    // -------------------------------------------------------------------------
+
+    @Nested
+    class LargeValues {
+
+        @Test
+        void rectangleAtMaxIntHalfCoordsShouldNotThrow() {
+            int halfMax = Integer.MAX_VALUE / 2;
+            assertDoesNotThrow(() -> SRectangle.create(halfMax, halfMax, 100, 100),
+                    "SRectangle.create() with very large coordinates must not throw");
+        }
+
+        @Test
+        void rectangleAtMaxIntHalfCoordsPreservesBounds() {
+            int halfMax = Integer.MAX_VALUE / 2;
+            SRectangle rect = SRectangle.create(halfMax, halfMax, 100, 100);
+            assertEquals(halfMax, rect.getBounds().x,   "x should be Integer.MAX_VALUE/2");
+            assertEquals(halfMax, rect.getBounds().y,   "y should be Integer.MAX_VALUE/2");
+            assertEquals(100,     rect.getBounds().width,  "width should be 100");
+            assertEquals(100,     rect.getBounds().height, "height should be 100");
+        }
+
+        @Test
+        void translateWithLargeValuesShouldNotThrow() {
+            SRectangle rect = SRectangle.create(0, 0, 50, 50);
+            // Integer overflow is a known platform behaviour; we only assert no exception
+            assertDoesNotThrow(() -> rect.translate(Integer.MAX_VALUE, Integer.MAX_VALUE),
+                    "translate() with Integer.MAX_VALUE must not throw (overflow is acceptable)");
+        }
+
+        @Test
+        void translateWithLargeNegativeValuesShouldNotThrow() {
+            SRectangle rect = SRectangle.create(0, 0, 50, 50);
+            assertDoesNotThrow(() -> rect.translate(Integer.MIN_VALUE, Integer.MIN_VALUE),
+                    "translate() with Integer.MIN_VALUE must not throw (overflow is acceptable)");
+        }
+    }
+}

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

@@ -44,4 +44,40 @@ class STextTest {
         SText text = SText.create(0, 0, null);
         assertEquals(SText.PLACEHOLDER_TEXT, text.getText());
     }
+
+    @Test
+    void testUpdateMeasuredBoundsActuallyUpdatesBounds() {
+        SText text = SText.create(10, 20, "Hello");
+        text.updateMeasuredBounds(200, 30);
+        Rectangle bounds = text.getBounds();
+        assertEquals(200, bounds.width, "updateMeasuredBounds must update width");
+        assertEquals(30, bounds.height, "updateMeasuredBounds must update height");
+    }
+
+    @Test
+    void testUpdateMeasuredBoundsDoesNotChangePosition() {
+        SText text = SText.create(10, 20, "Hello");
+        text.updateMeasuredBounds(200, 30);
+        Rectangle bounds = text.getBounds();
+        assertEquals(10, bounds.x, "updateMeasuredBounds must not change x");
+        assertEquals(20, bounds.y, "updateMeasuredBounds must not change y");
+    }
+
+    @Test
+    void testUpdateMeasuredBoundsNegativeClampedToZero() {
+        SText text = SText.create(0, 0, "Hello");
+        text.updateMeasuredBounds(-5, -10);
+        Rectangle bounds = text.getBounds();
+        assertEquals(0, bounds.width, "negative width must be clamped to 0");
+        assertEquals(0, bounds.height, "negative height must be clamped to 0");
+    }
+
+    @Test
+    void testUpdateMeasuredBoundsZeroIsAllowed() {
+        SText text = SText.create(0, 0, "Hello");
+        text.updateMeasuredBounds(0, 0);
+        Rectangle bounds = text.getBounds();
+        assertEquals(0, bounds.width);
+        assertEquals(0, bounds.height);
+    }
 }