Revert "Revert "Convert i/o slot to class in LGraphNode.configure"" (#518)

* Revert "Revert "Convert i/o slot to class in LGraphNode.configure (#506)" (#511)"

This reverts commit d029bd8924.

* nit

test/LGraphNode.test.ts

@@ -1,5 +1,6 @@
 import { describe, expect } from "vitest"
 import { LGraphNode } from "@/litegraph"
+import { NodeInputSlot, NodeOutputSlot } from "@/NodeSlot"
 import { lgTest } from "./lgTest"
 
 describe("LGraphNode", () => {
@@ -13,4 +14,39 @@ describe("LGraphNode", () => {
     expect(node.size).toEqual(new Float32Array([100, 100]))
     expect(node.serialize().size).toEqual([100, 100])
   })
+
+  lgTest("should configure inputs correctly", () => {
+    const node = new LGraphNode("TestNode")
+    node.configure({
+      id: 0,
+      inputs: [{ name: "TestInput", type: "number", link: null }],
+    })
+    expect(node.inputs.length).toEqual(1)
+    expect(node.inputs[0].name).toEqual("TestInput")
+    expect(node.inputs[0].link).toEqual(null)
+    expect(node.inputs[0]).instanceOf(NodeInputSlot)
+
+    // Should not override existing inputs
+    node.configure({ id: 1 })
+    expect(node.id).toEqual(1)
+    expect(node.inputs.length).toEqual(1)
+  })
+
+  lgTest("should configure outputs correctly", () => {
+    const node = new LGraphNode("TestNode")
+    node.configure({
+      id: 0,
+      outputs: [{ name: "TestOutput", type: "number", links: [] }],
+    })
+    expect(node.outputs.length).toEqual(1)
+    expect(node.outputs[0].name).toEqual("TestOutput")
+    expect(node.outputs[0].type).toEqual("number")
+    expect(node.outputs[0].links).toEqual([])
+    expect(node.outputs[0]).instanceOf(NodeOutputSlot)
+
+    // Should not override existing outputs
+    node.configure({ id: 1 })
+    expect(node.id).toEqual(1)
+    expect(node.outputs.length).toEqual(1)
+  })
 })