Add Refreshable trait

packages/vite/test/runtime.test.ts

@@ -0,0 +1,68 @@
+import * as Refreshable from "effect-fc-next/Refreshable"
+import { describe, expect, it, vi } from "vitest"
+import { accept, register } from "../src/runtime.js"
+
+
+describe("refresh runtime", () => {
+    it("retains a cell and notifies subscribers for compatible updates", async () => {
+        const hot = {
+            data: {},
+            accept: vi.fn(),
+            invalidate: vi.fn(),
+        }
+        const first = register({ body: "first" }, hot, "module:View", "hooks")
+        const cell = (first as Record<PropertyKey, unknown>)[Refreshable.RefreshableTypeId] as Refreshable.Cell
+        const listener = vi.fn()
+        cell.subscribe(listener)
+
+        const second = register({ body: "second" }, hot, "module:View", "hooks")
+        const secondCell = (second as Record<PropertyKey, unknown>)[Refreshable.RefreshableTypeId]
+
+        expect(secondCell).toBe(cell)
+        expect(cell.current).toBe(second)
+        expect(cell.snapshot).toEqual({
+            revision: 1,
+            resetRevision: 0,
+        })
+
+        await Promise.resolve()
+        expect(listener).toHaveBeenCalledTimes(1)
+    })
+
+    it("increments resetRevision for incompatible and forced updates", () => {
+        const hot = {
+            data: {},
+            accept: vi.fn(),
+            invalidate: vi.fn(),
+        }
+        const first = register({}, hot, "module:View", "one")
+        const cell = (first as Record<PropertyKey, unknown>)[Refreshable.RefreshableTypeId] as Refreshable.Cell
+
+        register({}, hot, "module:View", "two")
+        expect(cell.snapshot.resetRevision).toBe(1)
+
+        register({}, hot, "module:View", "two", true)
+        expect(cell.snapshot.resetRevision).toBe(2)
+    })
+
+    it("is inert outside a Vite hot context", () => {
+        const component = {}
+        expect(register(component, undefined, "module:View", "hooks")).toBe(component)
+        expect((component as Record<PropertyKey, unknown>)[Refreshable.RefreshableTypeId]).toBeUndefined()
+    })
+
+    it("invalidates when the module's View IDs change", () => {
+        const hot = {
+            data: {},
+            accept: vi.fn(),
+            invalidate: vi.fn(),
+        }
+
+        accept(hot, ["module:First"])
+        expect(hot.accept).toHaveBeenCalledTimes(1)
+        expect(hot.invalidate).not.toHaveBeenCalled()
+
+        accept(hot, ["module:Second"])
+        expect(hot.invalidate).toHaveBeenCalledWith("[effect-view] Effect View exports changed")
+    })
+})