added changeset and unit test

Author: NourBenz

.changeset/quiet-tires-fold.md

@@ -0,0 +1,5 @@
+---
+'mermaid': major
+---
+
+ensure quadrant titles wrap and stay within bounds

packages/mermaid/src/diagrams/quadrant-chart/quadrantDb.spec.ts

@@ -1,4 +1,6 @@
 import quadrantDb from './quadrantDb.js';
+// @ts-ignore: JISON doesn't support types
+import parser from './parser/quadrant.jison';
 
 describe('quadrant unit tests', () => {
   it('should parse the styles array and return a StylesObject', () => {
@@ -47,4 +49,28 @@ describe('quadrant unit tests', () => {
       'value for stroke-width 30 is invalid, please use a valid number of pixels (eg. 10px)'
     );
   });
+  it('should store long quadrant titles correctly (wrap handled in renderer)', () => {
+    const input = `
+    quadrantChart
+      quadrant-1 "🔥 This is a very long quadrant title that should wrap properly inside the box"
+      quadrant-2 "💡 Another long label that should be parsed fully"
+      quadrant-3 "Short"
+      quadrant-4 "🚀 Final test case with long label"
+  `;
+
+    quadrantDb.clear();
+    parser.yy = quadrantDb;
+    parser.quadrantDb(input);
+
+    expect(quadrantDb.getQuadrantData().quadrants[0].text.text).toBe(
+      '🔥 This is a very long quadrant title that should wrap properly inside the box'
+    );
+    expect(quadrantDb.getQuadrantData().quadrants[1].text.text).toBe(
+      '💡 Another long label that should be parsed fully'
+    );
+    expect(quadrantDb.getQuadrantData().quadrants[2].text.text).toBe('Short');
+    expect(quadrantDb.getQuadrantData().quadrants[3].text.text).toBe(
+      '🚀 Final test case with long label'
+    );
+  });
 });