Use unique socket per user for managing editor sessions (#6278)

Also warn if editor session manager socket cannot be created rather than failing.

test/unit/node/vscodeSocket.test.ts

@@ -1,5 +1,50 @@
-import { EditorSessionManager } from "../../../src/node/vscodeSocket"
-import { clean, tmpdir, listenOn } from "../../utils/helpers"
+import { logger } from "@coder/logger"
+import * as app from "../../../src/node/app"
+import { paths } from "../../../src/node/util"
+import {
+  DEFAULT_SOCKET_PATH,
+  EditorSessionManager,
+  makeEditorSessionManagerServer,
+} from "../../../src/node/vscodeSocket"
+import { clean, tmpdir, listenOn, mockLogger } from "../../utils/helpers"
+
+describe("DEFAULT_SOCKET_PATH", () => {
+  it("should be a unique path per user", () => {
+    expect(DEFAULT_SOCKET_PATH.startsWith(paths.data)).toBe(true)
+  })
+})
+
+describe("makeEditorSessionManagerServer", () => {
+  let tmpDirPath: string
+
+  const testName = "mesms"
+
+  beforeAll(async () => {
+    jest.clearAllMocks()
+    mockLogger()
+    await clean(testName)
+  })
+
+  afterAll(() => {
+    jest.resetModules()
+  })
+
+  beforeEach(async () => {
+    tmpDirPath = await tmpdir(testName)
+  })
+
+  it("warns if socket cannot be created", async () => {
+    jest.spyOn(app, "listen").mockImplementation(() => {
+      throw new Error()
+    })
+    const server = await makeEditorSessionManagerServer(
+      `${tmpDirPath}/code-server-ipc.sock`,
+      new EditorSessionManager(),
+    )
+    expect(logger.warn).toHaveBeenCalledWith(`Could not create socket at ${tmpDirPath}/code-server-ipc.sock`)
+    server.close()
+  })
+})
 
 describe("EditorSessionManager", () => {
   let tmpDirPath: string