ComfyUI_frontend/src/lib/litegraph/test/ToOutputRenderLink.test.ts

import { describe, expect, it, vi } from "vitest"

import { ToOutputRenderLink } from "@/canvas/ToOutputRenderLink"
import { LinkDirection } from "@/types/globalEnums"

describe("ToOutputRenderLink", () => {
  describe("connectToOutput", () => {
    it("should return early if inputNode is null", () => {
      // Setup
      const mockNetwork = {}
      const mockFromSlot = {}
      const mockNode = { id: "test-id", inputs: [mockFromSlot], getInputPos: vi.fn().mockReturnValue([0, 0]) }

      const renderLink = new ToOutputRenderLink(
        mockNetwork as any,
        mockNode as any,
        mockFromSlot as any,
        undefined,
        LinkDirection.CENTER,
      )

      // Override the node property to simulate null case
      Object.defineProperty(renderLink, "node", {
        value: null,
      })

      const mockTargetNode = {
        connectSlots: vi.fn(),
      }
      const mockEvents = {
        dispatch: vi.fn(),
      }

      // Act
      renderLink.connectToOutput(
        mockTargetNode as any,
        {} as any,
        mockEvents as any,
      )

      // Assert
      expect(mockTargetNode.connectSlots).not.toHaveBeenCalled()
      expect(mockEvents.dispatch).not.toHaveBeenCalled()
    })

    it("should create connection and dispatch event when inputNode exists", () => {
      // Setup
      const mockNetwork = {}
      const mockFromSlot = {}
      const mockNode = {
        id: "test-id",
        inputs: [mockFromSlot],
        getInputPos: vi.fn().mockReturnValue([0, 0]),
      }

      const renderLink = new ToOutputRenderLink(
        mockNetwork as any,
        mockNode as any,
        mockFromSlot as any,
        undefined,
        LinkDirection.CENTER,
      )

      const mockNewLink = { id: "new-link" }
      const mockTargetNode = {
        connectSlots: vi.fn().mockReturnValue(mockNewLink),
      }
      const mockEvents = {
        dispatch: vi.fn(),
      }

      // Act
      renderLink.connectToOutput(
        mockTargetNode as any,
        {} as any,
        mockEvents as any,
      )

      // Assert
      expect(mockTargetNode.connectSlots).toHaveBeenCalledWith(
        expect.anything(),
        mockNode,
        mockFromSlot,
        undefined,
      )
      expect(mockEvents.dispatch).toHaveBeenCalledWith(
        "link-created",
        mockNewLink,
      )
    })
  })
})