chore: refactoring and tests, splitting up files (#12495)

packages/app/src/context/sync-optimistic.test.ts

@@ -0,0 +1,56 @@
+import { describe, expect, test } from "bun:test"
+import type { Message, Part } from "@opencode-ai/sdk/v2/client"
+import { applyOptimisticAdd, applyOptimisticRemove } from "./sync"
+
+const userMessage = (id: string, sessionID: string): Message => ({
+  id,
+  sessionID,
+  role: "user",
+  time: { created: 1 },
+  agent: "assistant",
+  model: { providerID: "openai", modelID: "gpt" },
+})
+
+const textPart = (id: string, sessionID: string, messageID: string): Part => ({
+  id,
+  sessionID,
+  messageID,
+  type: "text",
+  text: id,
+})
+
+describe("sync optimistic reducers", () => {
+  test("applyOptimisticAdd inserts message in sorted order and stores parts", () => {
+    const sessionID = "ses_1"
+    const draft = {
+      message: { [sessionID]: [userMessage("msg_2", sessionID)] },
+      part: {} as Record<string, Part[] | undefined>,
+    }
+
+    applyOptimisticAdd(draft, {
+      sessionID,
+      message: userMessage("msg_1", sessionID),
+      parts: [textPart("prt_2", sessionID, "msg_1"), textPart("prt_1", sessionID, "msg_1")],
+    })
+
+    expect(draft.message[sessionID]?.map((x) => x.id)).toEqual(["msg_1", "msg_2"])
+    expect(draft.part.msg_1?.map((x) => x.id)).toEqual(["prt_1", "prt_2"])
+  })
+
+  test("applyOptimisticRemove removes message and part entries", () => {
+    const sessionID = "ses_1"
+    const draft = {
+      message: { [sessionID]: [userMessage("msg_1", sessionID), userMessage("msg_2", sessionID)] },
+      part: {
+        msg_1: [textPart("prt_1", sessionID, "msg_1")],
+        msg_2: [textPart("prt_2", sessionID, "msg_2")],
+      } as Record<string, Part[] | undefined>,
+    }
+
+    applyOptimisticRemove(draft, { sessionID, messageID: "msg_1" })
+
+    expect(draft.message[sessionID]?.map((x) => x.id)).toEqual(["msg_2"])
+    expect(draft.part.msg_1).toBeUndefined()
+    expect(draft.part.msg_2).toHaveLength(1)
+  })
+})