test: share channels command mock harness

src/commands/channels.mock-harness.ts

@@ -0,0 +1,27 @@
+import { vi } from "vitest";
+
+export const configMocks = {
+  readConfigFileSnapshot: vi.fn(),
+  writeConfigFile: vi.fn().mockResolvedValue(undefined),
+};
+
+export const offsetMocks = {
+  deleteTelegramUpdateOffset: vi.fn().mockResolvedValue(undefined),
+};
+
+vi.mock("../config/config.js", async (importOriginal) => {
+  const actual = await importOriginal<typeof import("../config/config.js")>();
+  return {
+    ...actual,
+    readConfigFileSnapshot: configMocks.readConfigFileSnapshot,
+    writeConfigFile: configMocks.writeConfigFile,
+  };
+});
+
+vi.mock("../telegram/update-offset-store.js", async (importOriginal) => {
+  const actual = await importOriginal<typeof import("../telegram/update-offset-store.js")>();
+  return {
+    ...actual,
+    deleteTelegramUpdateOffset: offsetMocks.deleteTelegramUpdateOffset,
+  };
+});