Lint module entry point (#635)

- Adds module entry point tests
- Manually resolved lint rules for module entry point imports / exports
(autofix could not resolve without causing issues)

test/litegraph.test.ts

@@ -1,11 +1,11 @@
-import { describe, expect } from "vitest"
+import { beforeEach, describe, expect, vi } from "vitest"
 
 import { clamp, LGraphCanvas, LiteGraph } from "@/litegraph"
 import { LiteGraphGlobal } from "@/LiteGraphGlobal"
 
 import { test } from "./testExtensions"
 
-describe.concurrent("Litegraph module", () => {
+describe("Litegraph module", () => {
   test("contains a global export", ({ expect }) => {
     expect(LiteGraph).toBeInstanceOf(LiteGraphGlobal)
     expect(LiteGraph.LGraphCanvas).toBe(LGraphCanvas)
@@ -21,3 +21,35 @@ describe.concurrent("Litegraph module", () => {
     expect(clamp(Infinity, 18, 29)).toStrictEqual(29)
   })
 })
+
+describe("Import order dependency", () => {
+  beforeEach(() => {
+    vi.resetModules()
+  })
+
+  // Test can be safely removed if import order requirements are resolved.
+  test("Throws when entry point is not imported first", async ({ expect }) => {
+    async function importSubmoduleFirst() {
+      const directImport = await import("@/LGraph")
+      const entryPointImport = await import("@/litegraph")
+
+      // Unreachable.
+      if (directImport !== entryPointImport) return
+    }
+
+    await expect(importSubmoduleFirst).rejects.toThrow("Cannot set properties of undefined (setting 'link_type_colors')")
+  })
+
+  test("Imports without error when entry point is imported first", async ({ expect }) => {
+    async function importNormally() {
+      const entryPointImport = await import("@/litegraph")
+      const directImport = await import("@/LGraph")
+
+      // Sanity check that imports were cleared.
+      expect(Object.is(LiteGraph, entryPointImport.LiteGraph)).toBe(false)
+      expect(Object.is(LiteGraph.LGraph, directImport.LGraph)).toBe(false)
+    }
+
+    await expect(importNormally()).resolves.toBeUndefined()
+  })
+})