test: add test case, update snapshots

packages/g6/__tests__/bugs/model-add-edge-in-combo.spec.ts

@@ -0,0 +1,52 @@
+import { createGraph } from '@@/utils';
+
+describe('add edge in combo', () => {
+  it('add edge in combo without zIndex', async () => {
+    const graph = createGraph({
+      data: {
+        nodes: [
+          { id: 'node-1', combo: 'combo-1', style: { x: 100, y: 100 } },
+          { id: 'node-2', combo: 'combo-1', style: { x: 200, y: 200 } },
+        ],
+        combos: [{ id: 'combo-1' }],
+      },
+    });
+
+    await graph.draw();
+
+    graph.addEdgeData([{ id: 'edge', source: 'node-1', target: 'node-2' }]);
+    await graph.draw();
+
+    expect(graph.getEdgeData('edge').style?.zIndex).toBe(undefined);
+    // @ts-expect-error skip the type check
+    expect(graph.context.element?.getElement('edge')?.style.zIndex).toBe(1);
+  });
+
+  it('add edge in combo with zIndex', async () => {
+    const graph = createGraph({
+      data: {
+        nodes: [
+          { id: 'node-1', combo: 'combo-1', style: { x: 100, y: 100 } },
+          { id: 'node-2', combo: 'combo-1', style: { x: 200, y: 200 } },
+          { id: 'node-3', style: { x: 300, y: 300, zIndex: 5 } },
+        ],
+        combos: [{ id: 'combo-1' }],
+      },
+    });
+
+    await graph.draw();
+
+    expect(graph.getComboData('combo-1').style?.zIndex).toBe(undefined);
+
+    await graph.frontElement('combo-1');
+
+    expect(graph.getComboData('combo-1').style?.zIndex).toBe(5 + 1);
+
+    graph.addEdgeData([{ id: 'edge', source: 'node-1', target: 'node-2' }]);
+    await graph.draw();
+
+    expect(graph.getEdgeData('edge').style?.zIndex).toBe(undefined);
+    // @ts-expect-error skip the type check
+    expect(graph.context.element?.getElement('edge')?.style.zIndex).toBe(5 + 1 + 1);
+  });
+});