Add unit test for vertex and edge having both strings and text

packages/mermaid/src/diagrams/flowchart/parser/flow-text.spec.js

@@ -690,4 +690,16 @@ describe('[Text] when parsing', () => {
     expect(vert['A'].text).toBe(',.?!+-*');
     expect(edges[0].text).toBe(',.?!+-*');
   });
+
+  it('should handle strings and text at the same time', function () {
+    const res = flow.parser.parse(
+      'graph TD;A(this node has "string" and text)-->|this link has "string" and text|C;'
+    );
+
+    const vert = flow.parser.yy.getVertices();
+    const edges = flow.parser.yy.getEdges();
+
+    expect(vert['A'].text).toBe('this node has "string" and text');
+    expect(edges[0].text).toBe('this link has "string" and text');
+  });
 });