import { describe, expect, it } from "vite-plus/test"; import {  ConnectionStorageOperationError,  ConnectionTransientError,  IndexedDbUnavailableError,} from "./model.ts"; describe("ConnectionTransientError.fromStorageFailure", () => {  it("preserves structured operation context and the complete failure chain", () => {    const storageCause = new Error("quota exceeded");    const storageOperationCause = new ConnectionStorageOperationError({      operation: "write",      backend: "indexed-db",      storeName: "catalog",      cause: storageCause,    });     const error = ConnectionTransientError.fromStorageFailure(storageOperationCause);     expect(error).toMatchObject({      reason: "remote-unavailable",      cause: {        _tag: "ConnectionStorageOperationError",        operation: "write",        backend: "indexed-db",        storeName: "catalog",        cause: storageCause,      },    });    expect(error.detail).toBe("Could not write local connection data.");    expect(error.message).toBe("Connection attempt failed (remote-unavailable).");  });   it("maps a cause-free availability failure without inventing a defect", () => {    const error = ConnectionTransientError.fromStorageFailure(new IndexedDbUnavailableError());     expect(error.cause).toMatchObject({ _tag: "IndexedDbUnavailableError" });    expect((error.cause as IndexedDbUnavailableError).cause).toBeUndefined();  });});