test: add core unit tests

- Add JUnit 5 Jupiter dependencies to pom.xml
- Add maven-surefire-plugin for test execution
- Add AbstractShapeTest for base class methods
- Add SCircleTest, SRectangleTest, STriangleTest, STextTest

Tests cover: creation, bounds, clone, resize (AbstractShape)

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

@@ -0,0 +1,68 @@
+package ovh.gasser.newshapes.shapes;
+
+import ovh.gasser.newshapes.attributes.Attributes;
+import ovh.gasser.newshapes.attributes.SelectionAttributes;
+import org.junit.jupiter.api.Test;
+import java.awt.Rectangle;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class AbstractShapeTest {
+
+    @Test
+    void testGetBoundsReturnsCopy() {
+        SRectangle rect = SRectangle.create(10, 20, 100, 50);
+        Rectangle bounds = rect.getBounds();
+        
+        // Modify the returned bounds
+        bounds.x = 999;
+        
+        // Original should be unchanged
+        assertEquals(10, rect.getBounds().x);
+    }
+
+    @Test
+    void testAddAndGetAttributes() {
+        SRectangle rect = SRectangle.create(0, 0, 10, 10);
+        Attributes attrs = new SelectionAttributes();
+        rect.addAttributes(attrs);
+        
+        assertSame(attrs, rect.getAttributes(SelectionAttributes.ID));
+    }
+
+    @Test
+    void testTranslate() {
+        SRectangle rect = SRectangle.create(10, 20, 100, 50);
+        rect.translate(5, 10);
+        
+        assertEquals(15, rect.getBounds().x);
+        assertEquals(30, rect.getBounds().y);
+    }
+
+    @Test
+    void testResizeEast() {
+        SRectangle rect = SRectangle.create(0, 0, 100, 50);
+        rect.resize(ResizeHandle.E, 20, 0);
+        
+        assertEquals(120, rect.getBounds().width);
+    }
+
+    @Test
+    void testResizeSouth() {
+        SRectangle rect = SRectangle.create(0, 0, 100, 50);
+        rect.resize(ResizeHandle.S, 0, 30);
+        
+        assertEquals(80, rect.getBounds().height);
+    }
+
+    @Test
+    void testToString() {
+        SRectangle rect = SRectangle.create(10, 20, 100, 50);
+        String str = rect.toString();
+        
+        assertTrue(str.contains("x=10"));
+        assertTrue(str.contains("y=20"));
+        assertTrue(str.contains("width=100"));
+        assertTrue(str.contains("height=50"));
+    }
+}

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

@@ -0,0 +1,58 @@
+package ovh.gasser.newshapes.shapes;
+
+import org.junit.jupiter.api.Test;
+import java.awt.Color;
+import java.awt.Rectangle;
+import java.awt.Shape;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class SCircleTest {
+    @Test
+    void testCreateWithDefaultColor() {
+        SCircle circle = SCircle.create(10, 20, 50);
+        assertNotNull(circle);
+        assertEquals(50, circle.getRadius());
+    }
+
+    @Test
+    void testCreateWithCustomColor() {
+        SCircle circle = SCircle.create(0, 0, 10, Color.RED);
+        assertNotNull(circle);
+        assertEquals(10, circle.getRadius());
+        try {
+            Object color = circle.getClass().getMethod("getColor").invoke(circle);
+            assertEquals(Color.RED, color);
+        } catch (NoSuchMethodException e) {
+            // Method not available; skip color check
+        } catch (Exception e) {
+            fail("Unexpected exception while verifying color: " + e);
+        }
+    }
+
+    @Test
+    void testGetRadius() {
+        SCircle circle = SCircle.create(5, 5, 15);
+        assertEquals(15, circle.getRadius());
+    }
+
+    @Test
+    void testCloneCreatesIndependentCopy() {
+        SCircle original = SCircle.create(12, 34, 7);
+        Object cloneObj = original.clone();
+        assertNotSame(original, cloneObj);
+        assertTrue(cloneObj instanceof SCircle);
+        SCircle clone = (SCircle) cloneObj;
+        assertEquals(original.getRadius(), clone.getRadius());
+    }
+
+    @Test
+    void testBoundsAreCalculatedFromRadius() {
+        SCircle circle = SCircle.create(10, 20, 5);
+        Rectangle bounds = circle.getBounds();
+        assertEquals(10, bounds.x);
+        assertEquals(20, bounds.y);
+        assertEquals(10, bounds.width);
+        assertEquals(10, bounds.height);
+    }
+}

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

@@ -0,0 +1,45 @@
+package ovh.gasser.newshapes.shapes;
+
+import org.junit.jupiter.api.Test;
+import java.awt.Color;
+import java.awt.Rectangle;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class SRectangleTest {
+    @Test
+    void testCreateWithDefaultColor() {
+        SRectangle rect = SRectangle.create(10, 20, 100, 50);
+        assertNotNull(rect);
+        assertEquals(100, rect.getBounds().width);
+        assertEquals(50, rect.getBounds().height);
+    }
+
+    @Test
+    void testCreateWithCustomColor() {
+        SRectangle rect = SRectangle.create(5, 5, 30, 40, Color.RED);
+        assertNotNull(rect);
+        assertEquals(30, rect.getBounds().width);
+        assertEquals(40, rect.getBounds().height);
+    }
+
+    @Test
+    void testCloneCreatesIndependentCopy() {
+        SRectangle original = SRectangle.create(0, 0, 10, 10, Color.BLUE);
+        Object cloneObj = original.clone();
+        assertNotSame(original, cloneObj);
+        assertTrue(cloneObj instanceof SRectangle);
+        SRectangle clone = (SRectangle) cloneObj;
+        assertEquals(original.getBounds(), clone.getBounds());
+    }
+
+    @Test
+    void testBoundsAreSetCorrectly() {
+        SRectangle rect = SRectangle.create(15, 25, 80, 60);
+        Rectangle bounds = rect.getBounds();
+        assertEquals(15, bounds.x);
+        assertEquals(25, bounds.y);
+        assertEquals(80, bounds.width);
+        assertEquals(60, bounds.height);
+    }
+}

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

@@ -0,0 +1,47 @@
+package ovh.gasser.newshapes.shapes;
+
+import org.junit.jupiter.api.Test;
+import java.awt.Font;
+import java.awt.Rectangle;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class STextTest {
+    @Test
+    void testCreate() {
+        SText text = SText.create(10, 20, "Hello");
+        assertNotNull(text);
+        assertEquals("Hello", text.getText());
+    }
+
+    @Test
+    void testCreateWithDefaultValues() {
+        SText text = SText.create(0, 0, "Test");
+        assertEquals("Test", text.getText());
+        assertEquals(SText.DEFAULT_FONT_SIZE, text.getFontSize());
+        assertEquals(SText.DEFAULT_FONT_NAME, text.getFontName());
+        assertEquals(SText.DEFAULT_FONT_STYLE, text.getFontStyle());
+    }
+
+    @Test
+    void testCloneCreatesIndependentCopy() {
+        SText original = SText.create(5, 5, "Copy");
+        Object cloneObj = original.clone();
+        assertNotSame(original, cloneObj);
+        assertTrue(cloneObj instanceof SText);
+        SText clone = (SText) cloneObj;
+        assertEquals(original.getText(), clone.getText());
+    }
+
+    @Test
+    void testPlaceholderTextForEmpty() {
+        SText text = SText.create(0, 0, "");
+        assertEquals(SText.PLACEHOLDER_TEXT, text.getText());
+    }
+
+    @Test
+    void testPlaceholderTextForNull() {
+        SText text = SText.create(0, 0, null);
+        assertEquals(SText.PLACEHOLDER_TEXT, text.getText());
+    }
+}

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

@@ -0,0 +1,37 @@
+package ovh.gasser.newshapes.shapes;
+
+import org.junit.jupiter.api.Test;
+import java.awt.Color;
+import java.awt.Rectangle;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class STriangleTest {
+    @Test
+    void testCreate() {
+        STriangle triangle = STriangle.create(10, 20, 50, Color.RED, Color.BLACK);
+        assertNotNull(triangle);
+        assertEquals(50, triangle.getBounds().width);
+        assertEquals(50, triangle.getBounds().height);
+    }
+
+    @Test
+    void testCloneCreatesIndependentCopy() {
+        STriangle original = STriangle.create(0, 0, 30, Color.BLUE, Color.BLACK);
+        Object cloneObj = original.clone();
+        assertNotSame(original, cloneObj);
+        assertTrue(cloneObj instanceof STriangle);
+        STriangle clone = (STriangle) cloneObj;
+        assertEquals(original.getBounds(), clone.getBounds());
+    }
+
+    @Test
+    void testBoundsAreSetCorrectly() {
+        STriangle triangle = STriangle.create(5, 10, 25, Color.GREEN, Color.BLACK);
+        Rectangle bounds = triangle.getBounds();
+        assertEquals(5, bounds.x);
+        assertEquals(10, bounds.y);
+        assertEquals(25, bounds.width);
+        assertEquals(25, bounds.height);
+    }
+}