test: add defaultEdgeOptions test

e2e/cypress/component/1-store/edges/defaultEdgeOptions.cy.ts

@@ -0,0 +1,51 @@
+import type { DefaultEdgeOptions } from '@vue-flow/core'
+import { useVueFlow } from '@vue-flow/core'
+import { getElements } from '../../../utils'
+
+const { nodes, edges } = getElements(2, 2)
+
+const defaultEdgeOptions: DefaultEdgeOptions = {
+  class: 'custom-class',
+  type: 'custom-type',
+}
+
+describe('Default Edge Options', () => {
+  const store = useVueFlow({ id: 'test' })
+
+  beforeEach(() => {
+    cy.vueFlow({
+      nodes,
+      edges: [
+        {
+          id: 'customEdge',
+          source: nodes[0].id,
+          target: nodes[1].id,
+          type: 'custom',
+        },
+        ...edges,
+      ],
+      defaultEdgeOptions,
+    })
+  })
+
+  it('sets default edge options', () => {
+    store.edges.value.forEach((edge) => {
+      expect(edge.class).to.equal(defaultEdgeOptions.class)
+    })
+
+    cy.get('.vue-flow__edge').should('have.class', defaultEdgeOptions.class)
+  })
+
+  it('does not override edge values with defaults', () => {
+    store.edges.value.forEach((edge) => {
+      if (edge.id === 'customEdge') {
+        return expect(edge.type).to.equal('custom')
+      }
+
+      expect(edge.type).to.equal(defaultEdgeOptions.type)
+    })
+
+    // uses fallback default slot
+    cy.get('.vue-flow__edge').should('have.class', 'vue-flow__edge-default')
+  })
+})