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@@ -0,0 +1,507 @@
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+const actualFsPromises = jest.requireActual("fs/promises")
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+const originalFsPromisesRename = actualFsPromises.rename
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+const originalFsPromisesUnlink = actualFsPromises.unlink
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+const originalFsPromisesWriteFile = actualFsPromises.writeFile
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+const _originalFsPromisesAccess = actualFsPromises.access
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+
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+jest.mock("fs/promises", () => {
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+ const actual = jest.requireActual("fs/promises")
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+ // Start with all actual implementations.
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+ const mockedFs = { ...actual }
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+
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+ // Selectively wrap functions with jest.fn() if they are spied on
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+ // or have their implementations changed in tests.
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+ // This ensures that other fs.promises functions used by the SUT
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+ // (like proper-lockfile's internals) will use their actual implementations.
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+ mockedFs.writeFile = jest.fn(actual.writeFile)
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+ mockedFs.readFile = jest.fn(actual.readFile)
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+ mockedFs.rename = jest.fn(actual.rename)
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+ mockedFs.unlink = jest.fn(actual.unlink)
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+ mockedFs.access = jest.fn(actual.access)
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+ mockedFs.mkdtemp = jest.fn(actual.mkdtemp)
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+ mockedFs.rm = jest.fn(actual.rm)
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+ mockedFs.readdir = jest.fn(actual.readdir)
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+ // fs.stat and fs.lstat will be available via { ...actual }
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+
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+ return mockedFs
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+})
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+
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+// Mock the 'fs' module for fsSync.createWriteStream
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+jest.mock("fs", () => {
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+ const actualFs = jest.requireActual("fs")
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+ return {
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+ ...actualFs, // Spread actual implementations
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+ createWriteStream: jest.fn((...args: any[]) => actualFs.createWriteStream(...args)), // Default to actual, but mockable
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+ }
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+})
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+
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+import * as fs from "fs/promises" // This will now be the mocked version
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+import * as fsSyncActual from "fs" // This will now import the mocked 'fs'
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+import * as path from "path"
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+import * as os from "os"
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+// import * as lockfile from 'proper-lockfile' // No longer directly used in tests
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+import { safeWriteJson } from "../safeWriteJson"
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+import { Writable } from "stream" // For typing mock stream
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+
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+describe("safeWriteJson", () => {
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+ jest.useRealTimers() // Use real timers for this test suite
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+
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+ let tempTestDir: string = ""
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+ let currentTestFilePath = ""
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+
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+ beforeEach(async () => {
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+ // Create a unique temporary directory for each test
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+ const tempDirPrefix = path.join(os.tmpdir(), "safeWriteJson-test-")
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+ tempTestDir = await fs.mkdtemp(tempDirPrefix)
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+ currentTestFilePath = path.join(tempTestDir, "test-data.json")
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+ // Ensure the file exists for locking purposes by default.
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+ // Tests that need it to not exist must explicitly unlink it.
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+ await fs.writeFile(currentTestFilePath, JSON.stringify({ initial: "content by beforeEach" }), "utf8")
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+ })
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+
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+ afterEach(async () => {
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+ if (tempTestDir) {
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+ await fs.rm(tempTestDir, { recursive: true, force: true })
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+ tempTestDir = ""
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+ }
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+ // activeLocks is no longer used
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+
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+ // Explicitly reset mock implementations to default (actual) behavior
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+ // This helps prevent state leakage between tests if spy.mockRestore() isn't fully effective
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+ // for functions on the module mock created by the factory.
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+ ;(fs.writeFile as jest.Mock).mockImplementation(actualFsPromises.writeFile)
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+ ;(fs.rename as jest.Mock).mockImplementation(actualFsPromises.rename)
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+ ;(fs.unlink as jest.Mock).mockImplementation(actualFsPromises.unlink)
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+ ;(fs.access as jest.Mock).mockImplementation(actualFsPromises.access)
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+ ;(fs.readFile as jest.Mock).mockImplementation(actualFsPromises.readFile)
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+ ;(fs.mkdtemp as jest.Mock).mockImplementation(actualFsPromises.mkdtemp)
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+ ;(fs.rm as jest.Mock).mockImplementation(actualFsPromises.rm)
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+ ;(fs.readdir as jest.Mock).mockImplementation(actualFsPromises.readdir)
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+ // Ensure all mocks are reset after each test
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+ jest.restoreAllMocks()
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+ })
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+
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+ const readJsonFile = async (filePath: string): Promise<any | null> => {
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+ try {
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+ const content = await fs.readFile(filePath, "utf8") // Now uses the mocked fs
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+ return JSON.parse(content)
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+ } catch (error: any) {
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+ if (error && error.code === "ENOENT") {
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+ return null // File not found
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+ }
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+ throw error
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+ }
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+ }
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+
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+ const listTempFiles = async (dir: string, baseName: string): Promise<string[]> => {
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+ const files = await fs.readdir(dir) // Now uses the mocked fs
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+ return files.filter((f: string) => f.startsWith(`.${baseName}.new_`) || f.startsWith(`.${baseName}.bak_`))
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+ }
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+
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+ // Success Scenarios
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+ // Note: With the beforeEach change, this test now effectively tests overwriting the initial file.
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+ // If "creation from non-existence" is critical and locking prevents it, safeWriteJson or locking strategy needs review.
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+ test("should successfully write a new file (overwriting initial content from beforeEach)", async () => {
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+ const data = { message: "Hello, new world!" }
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+ await safeWriteJson(currentTestFilePath, data)
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+
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+ const writtenData = await readJsonFile(currentTestFilePath)
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+ expect(writtenData).toEqual(data)
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+ const tempFiles = await listTempFiles(tempTestDir, "test-data.json")
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+ expect(tempFiles.length).toBe(0)
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+ })
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+
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+ test("should successfully overwrite an existing file", async () => {
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+ const initialData = { message: "Initial content" }
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+ await fs.writeFile(currentTestFilePath, JSON.stringify(initialData)) // Now uses the mocked fs for setup
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+
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+ const newData = { message: "Updated content" }
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+ await safeWriteJson(currentTestFilePath, newData)
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+
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+ const writtenData = await readJsonFile(currentTestFilePath)
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+ expect(writtenData).toEqual(newData)
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+ const tempFiles = await listTempFiles(tempTestDir, "test-data.json")
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+ expect(tempFiles.length).toBe(0)
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+ })
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+
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+ // Failure Scenarios
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+ test("should handle failure when writing to tempNewFilePath", async () => {
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+ // currentTestFilePath exists due to beforeEach, allowing lock acquisition.
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+ const data = { message: "This should not be written" }
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+
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+ const mockErrorStream = new Writable() as jest.Mocked<Writable> & { _write?: any }
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+ mockErrorStream._write = (_chunk: any, _encoding: any, callback: (error?: Error | null) => void) => {
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+ // Simulate an error during write
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+ callback(new Error("Simulated Stream Error: createWriteStream failed"))
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+ }
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+
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+ // Mock createWriteStream to simulate a failure during the streaming of data to the temp file.
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+ ;(fsSyncActual.createWriteStream as jest.Mock).mockImplementationOnce((_path: any, _options: any) => {
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+ const stream = new Writable({
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+ write(_chunk, _encoding, cb) {
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+ cb(new Error("Simulated Stream Error: createWriteStream failed"))
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+ },
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+ // Ensure destroy is handled to prevent unhandled rejections in stream internals
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+ destroy(_error, cb) {
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+ if (cb) cb(_error)
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+ },
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+ })
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+ return stream as fsSyncActual.WriteStream
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+ })
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+
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+ await expect(safeWriteJson(currentTestFilePath, data)).rejects.toThrow(
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+ "Simulated Stream Error: createWriteStream failed",
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+ )
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+
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+ const writtenData = await readJsonFile(currentTestFilePath)
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+ // If write to .new fails, original file (from beforeEach) should remain.
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+ expect(writtenData).toEqual({ initial: "content by beforeEach" })
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+ const tempFiles = await listTempFiles(tempTestDir, "test-data.json")
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+ expect(tempFiles.length).toBe(0) // All temp files should be cleaned up
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+ })
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+
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+ test("should handle failure when renaming filePath to tempBackupFilePath (filePath exists)", async () => {
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+ const initialData = { message: "Initial content, should remain" }
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+ await originalFsPromisesWriteFile(currentTestFilePath, JSON.stringify(initialData)) // Use original for setup
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+
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+ const newData = { message: "This should not be written" }
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+ const renameSpy = jest.spyOn(fs, "rename")
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+ // First rename is target to backup
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+ renameSpy.mockImplementationOnce(async (oldPath: any, newPath: any) => {
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+ if (typeof newPath === "string" && newPath.includes(".bak_")) {
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+ throw new Error("Simulated FS Error: rename to tempBackupFilePath")
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+ }
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+ return originalFsPromisesRename(oldPath, newPath) // Use constant
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+ })
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+
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+ await expect(safeWriteJson(currentTestFilePath, newData)).rejects.toThrow(
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+ "Simulated FS Error: rename to tempBackupFilePath",
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+ )
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+
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+ const writtenData = await readJsonFile(currentTestFilePath)
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+ expect(writtenData).toEqual(initialData) // Original file should be intact
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+ const tempFiles = await listTempFiles(tempTestDir, "test-data.json")
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+ // tempNewFile was created, but should be cleaned up. Backup was not created.
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+ expect(tempFiles.filter((f: string) => f.includes(".new_")).length).toBe(0)
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+ expect(tempFiles.filter((f: string) => f.includes(".bak_")).length).toBe(0)
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+
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+ renameSpy.mockRestore()
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+ })
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+
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+ test("should handle failure when renaming tempNewFilePath to filePath (filePath exists, backup succeeded)", async () => {
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+ const initialData = { message: "Initial content, should be restored" }
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+ await fs.writeFile(currentTestFilePath, JSON.stringify(initialData)) // Use mocked fs for setup
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+
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+ const newData = { message: "This is in tempNewFilePath" }
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+ const renameSpy = jest.spyOn(fs, "rename")
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+ let renameCallCountTest1 = 0
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+ renameSpy.mockImplementation(async (oldPath: any, newPath: any) => {
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+ const oldPathStr = oldPath.toString()
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+ const newPathStr = newPath.toString()
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+ renameCallCountTest1++
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+ console.log(`[TEST 1] fs.rename spy call #${renameCallCountTest1}: ${oldPathStr} -> ${newPathStr}`)
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+
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+ // First rename call by safeWriteJson (if target exists) is target -> .bak
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+ if (renameCallCountTest1 === 1 && !oldPathStr.includes(".new_") && newPathStr.includes(".bak_")) {
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+ console.log("[TEST 1] Spy: Call #1 (target->backup), executing original rename.")
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+ return originalFsPromisesRename(oldPath, newPath)
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+ }
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+ // Second rename call by safeWriteJson is .new -> target
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+ else if (
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+ renameCallCountTest1 === 2 &&
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+ oldPathStr.includes(".new_") &&
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+ path.resolve(newPathStr) === path.resolve(currentTestFilePath)
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+ ) {
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+ console.log("[TEST 1] Spy: Call #2 (.new->target), THROWING SIMULATED ERROR.")
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+ throw new Error("Simulated FS Error: rename tempNewFilePath to filePath")
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+ }
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+ // Fallback for unexpected calls or if the target file didn't exist (only one rename: .new -> target)
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+ else if (
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+ renameCallCountTest1 === 1 &&
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+ oldPathStr.includes(".new_") &&
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+ path.resolve(newPathStr) === path.resolve(currentTestFilePath)
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+ ) {
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+ // This case handles if the initial file didn't exist, so only one rename happens.
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+ // For this specific test, we expect two renames.
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+ console.warn(
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+ "[TEST 1] Spy: Call #1 was .new->target, (unexpected for this test scenario, but handling)",
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+ )
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+ throw new Error("Simulated FS Error: rename tempNewFilePath to filePath")
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+ }
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+ console.warn(
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+ `[TEST 1] Spy: Unexpected call #${renameCallCountTest1} or paths. Defaulting to original rename. ${oldPathStr} -> ${newPathStr}`,
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+ )
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+ return originalFsPromisesRename(oldPath, newPath)
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+ })
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+
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+ // This scenario should reject because the new data couldn't be written to the final path,
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+ // even if rollback succeeds.
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+ await expect(safeWriteJson(currentTestFilePath, newData)).rejects.toThrow(
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+ "Simulated FS Error: rename tempNewFilePath to filePath",
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+ )
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+
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+ const writtenData = await readJsonFile(currentTestFilePath)
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+ expect(writtenData).toEqual(initialData) // Original file should be restored from backup
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+
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+ const tempFiles = await listTempFiles(tempTestDir, "test-data.json")
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+ expect(tempFiles.length).toBe(0) // All temp/backup files should be cleaned up
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+
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+ renameSpy.mockRestore()
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+ })
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+
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+ test("should handle failure when deleting tempBackupFilePath (filePath exists, all renames succeed)", async () => {
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+ const initialData = { message: "Initial content" }
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+ await fs.writeFile(currentTestFilePath, JSON.stringify(initialData)) // Use mocked fs for setup
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+
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+ const newData = { message: "This should be the final content" }
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+ const unlinkSpy = jest.spyOn(fs, "unlink")
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+ // The unlink that targets the backup file fails
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+ unlinkSpy.mockImplementationOnce(async (filePath: any) => {
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+ const filePathStr = filePath.toString()
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+ if (filePathStr.includes(".bak_")) {
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+ console.log("[TEST unlink bak] Mock: Simulating failure for unlink backup.")
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+ throw new Error("Simulated FS Error: delete tempBackupFilePath")
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+ }
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+ console.log("[TEST unlink bak] Mock: Condition NOT MET. Using originalFsPromisesUnlink.")
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+ return originalFsPromisesUnlink(filePath)
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+ })
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+
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+ // The function itself should still succeed from the user's perspective,
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+ // as the primary operation (writing the new data) was successful.
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+ // The error during backup cleanup is logged but not re-thrown to the caller.
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+ // However, the current implementation *does* re-throw. Let's test that behavior.
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+ // If the desired behavior is to not re-throw on backup cleanup failure, the main function needs adjustment.
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+ // The current safeWriteJson logic is to log the error and NOT reject.
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+ const consoleErrorSpy = jest.spyOn(console, "error").mockImplementation(() => {}) // Suppress console.error
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+
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+ await expect(safeWriteJson(currentTestFilePath, newData)).resolves.toBeUndefined()
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+
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+ // The main file should be the new data
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+ const writtenData = await readJsonFile(currentTestFilePath)
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+ expect(writtenData).toEqual(newData)
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+
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+ // Check that the cleanup failure was logged
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+ expect(consoleErrorSpy).toHaveBeenCalledWith(
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+ expect.stringContaining(`Successfully wrote ${currentTestFilePath}, but failed to clean up backup`),
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+ expect.objectContaining({ message: "Simulated FS Error: delete tempBackupFilePath" }),
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+ )
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+
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+ const tempFiles = await listTempFiles(tempTestDir, "test-data.json")
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+ // The .new file is gone (renamed to target), the .bak file failed to delete
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+ expect(tempFiles.filter((f: string) => f.includes(".new_")).length).toBe(0)
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+ expect(tempFiles.filter((f: string) => f.includes(".bak_")).length).toBe(1) // Backup file remains
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+
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+ unlinkSpy.mockRestore()
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+ consoleErrorSpy.mockRestore()
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+ })
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+
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+ // Note: With beforeEach change, currentTestFilePath will exist.
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+ // This test's original intent was "filePath does not exist".
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+ // It will now test the "filePath exists" path for the rename mock.
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+ // The expected error message might need to change if the mock behaves differently.
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+ test("should handle failure when renaming tempNewFilePath to filePath (filePath initially exists)", async () => {
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+ // currentTestFilePath exists due to beforeEach.
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+ // The original test unlinked it; we are removing that unlink to allow locking.
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+ const data = { message: "This should not be written" }
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+ const renameSpy = jest.spyOn(fs, "rename")
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+
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+ // The rename from tempNew to target fails.
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+ // The mock needs to correctly simulate failure for the "filePath exists" case.
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+ // The original mock was for "no prior file".
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+ // For this test to be meaningful, the rename mock should simulate the failure
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+ // appropriately when the target file (currentTestFilePath) exists.
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+ // The existing complex mock in `test("should handle failure when renaming tempNewFilePath to filePath (filePath exists, backup succeeded)"`
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+ // might be more relevant or adaptable here.
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+ // For simplicity, let's use a direct mock for the second rename call (new->target).
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+ let renameCallCount = 0
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+ renameSpy.mockImplementation(async (oldPath: any, newPath: any) => {
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+ renameCallCount++
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+ const oldPathStr = oldPath.toString()
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+ const newPathStr = newPath.toString()
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+
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+ if (renameCallCount === 1 && !oldPathStr.includes(".new_") && newPathStr.includes(".bak_")) {
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+ // Allow first rename (target to backup) to succeed
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+ return originalFsPromisesRename(oldPath, newPath)
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+ }
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+ if (
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+ renameCallCount === 2 &&
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+ oldPathStr.includes(".new_") &&
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+ path.resolve(newPathStr) === path.resolve(currentTestFilePath)
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+ ) {
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+ // Fail the second rename (tempNew to target)
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+ throw new Error("Simulated FS Error: rename tempNewFilePath to existing filePath")
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+ }
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+ return originalFsPromisesRename(oldPath, newPath)
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+ })
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+
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+ await expect(safeWriteJson(currentTestFilePath, data)).rejects.toThrow(
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+ "Simulated FS Error: rename tempNewFilePath to existing filePath",
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+ )
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+
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+ // After failure, the original content (from beforeEach or backup) should be there.
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+ const writtenData = await readJsonFile(currentTestFilePath)
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+ expect(writtenData).toEqual({ initial: "content by beforeEach" }) // Expect restored content
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+ // The assertion `expect(writtenData).toBeNull()` was incorrect if rollback is successful.
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+ const tempFiles = await listTempFiles(tempTestDir, "test-data.json")
|
|
|
+ expect(tempFiles.length).toBe(0) // All temp files should be cleaned up
|
|
|
+
|
|
|
+ renameSpy.mockRestore()
|
|
|
+ })
|
|
|
+
|
|
|
+ test("should throw an error if an inter-process lock is already held for the filePath", async () => {
|
|
|
+ jest.resetModules() // Clear module cache to ensure fresh imports for this test
|
|
|
+
|
|
|
+ const data = { message: "test lock" }
|
|
|
+ // Ensure the resource file exists.
|
|
|
+ await fs.writeFile(currentTestFilePath, "{}", "utf8")
|
|
|
+
|
|
|
+ // Temporarily mock proper-lockfile for this test only
|
|
|
+ jest.doMock("proper-lockfile", () => ({
|
|
|
+ ...jest.requireActual("proper-lockfile"),
|
|
|
+ lock: jest.fn().mockRejectedValueOnce(new Error("Failed to get lock.")),
|
|
|
+ }))
|
|
|
+
|
|
|
+ // Re-require safeWriteJson so it picks up the mocked proper-lockfile
|
|
|
+ const { safeWriteJson: safeWriteJsonWithMockedLock } =
|
|
|
+ require("../safeWriteJson") as typeof import("../safeWriteJson")
|
|
|
+
|
|
|
+ try {
|
|
|
+ await expect(safeWriteJsonWithMockedLock(currentTestFilePath, data)).rejects.toThrow(
|
|
|
+ /Failed to get lock.|Lock file is already being held/i,
|
|
|
+ )
|
|
|
+ } finally {
|
|
|
+ jest.unmock("proper-lockfile") // Ensure the mock is removed after this test
|
|
|
+ }
|
|
|
+ })
|
|
|
+ test("should release lock even if an error occurs mid-operation", async () => {
|
|
|
+ const data = { message: "test lock release on error" }
|
|
|
+
|
|
|
+ // Mock createWriteStream to simulate a failure during the streaming of data,
|
|
|
+ // to test if the lock is released despite this mid-operation error.
|
|
|
+ ;(fsSyncActual.createWriteStream as jest.Mock).mockImplementationOnce((_path: any, _options: any) => {
|
|
|
+ const stream = new Writable({
|
|
|
+ write(_chunk, _encoding, cb) {
|
|
|
+ cb(new Error("Simulated Stream Error during mid-operation write"))
|
|
|
+ },
|
|
|
+ // Ensure destroy is handled
|
|
|
+ destroy(_error, cb) {
|
|
|
+ if (cb) cb(_error)
|
|
|
+ },
|
|
|
+ })
|
|
|
+ return stream as fsSyncActual.WriteStream
|
|
|
+ })
|
|
|
+
|
|
|
+ await expect(safeWriteJson(currentTestFilePath, data)).rejects.toThrow(
|
|
|
+ "Simulated Stream Error during mid-operation write",
|
|
|
+ )
|
|
|
+
|
|
|
+ // Lock should be released, meaning the .lock file should not exist
|
|
|
+ const lockPath = `${path.resolve(currentTestFilePath)}.lock`
|
|
|
+ await expect(fs.access(lockPath)).rejects.toThrow(expect.objectContaining({ code: "ENOENT" }))
|
|
|
+ })
|
|
|
+
|
|
|
+ test("should handle fs.access error that is not ENOENT", async () => {
|
|
|
+ const data = { message: "access error test" }
|
|
|
+ const accessSpy = jest.spyOn(fs, "access").mockImplementationOnce(async () => {
|
|
|
+ const err = new Error("Simulated EACCES Error") as NodeJS.ErrnoException
|
|
|
+ err.code = "EACCES" // Simulate a permissions error, for example
|
|
|
+ throw err
|
|
|
+ })
|
|
|
+
|
|
|
+ await expect(safeWriteJson(currentTestFilePath, data)).rejects.toThrow("Simulated EACCES Error")
|
|
|
+
|
|
|
+ // Lock should be released, meaning the .lock file should not exist
|
|
|
+ const lockPath = `${path.resolve(currentTestFilePath)}.lock`
|
|
|
+ await expect(fs.access(lockPath)).rejects.toThrow(expect.objectContaining({ code: "ENOENT" }))
|
|
|
+
|
|
|
+ const tempFiles = await listTempFiles(tempTestDir, "test-data.json")
|
|
|
+ // .new file might have been created before access check, should be cleaned up
|
|
|
+ expect(tempFiles.filter((f: string) => f.includes(".new_")).length).toBe(0)
|
|
|
+
|
|
|
+ accessSpy.mockRestore()
|
|
|
+ })
|
|
|
+
|
|
|
+ // Test for rollback failure scenario
|
|
|
+ test("should log error and re-throw original if rollback fails", async () => {
|
|
|
+ const initialData = { message: "Initial, should be lost if rollback fails" }
|
|
|
+ await fs.writeFile(currentTestFilePath, JSON.stringify(initialData)) // Use mocked fs for setup
|
|
|
+ const newData = { message: "New data" }
|
|
|
+
|
|
|
+ const renameSpy = jest.spyOn(fs, "rename")
|
|
|
+ const consoleErrorSpy = jest.spyOn(console, "error").mockImplementation(() => {}) // Suppress console.error
|
|
|
+ let renameCallCountTest2 = 0
|
|
|
+
|
|
|
+ renameSpy.mockImplementation(async (oldPath: any, newPath: any) => {
|
|
|
+ const oldPathStr = oldPath.toString()
|
|
|
+ const newPathStr = newPath.toString()
|
|
|
+ renameCallCountTest2++
|
|
|
+ const resolvedOldPath = path.resolve(oldPathStr)
|
|
|
+ const resolvedNewPath = path.resolve(newPathStr)
|
|
|
+ const resolvedCurrentTFP = path.resolve(currentTestFilePath)
|
|
|
+ console.log(
|
|
|
+ `[TEST 2] fs.promises.rename call #${renameCallCountTest2}: oldPath=${oldPathStr} (resolved: ${resolvedOldPath}), newPath=${newPathStr} (resolved: ${resolvedNewPath}), currentTFP (resolved: ${resolvedCurrentTFP})`,
|
|
|
+ )
|
|
|
+
|
|
|
+ if (renameCallCountTest2 === 1) {
|
|
|
+ // Call 1: Original -> Backup (Succeeds)
|
|
|
+ if (resolvedOldPath === resolvedCurrentTFP && newPathStr.includes(".bak_")) {
|
|
|
+ console.log("[TEST 2] Call #1 (Original->Backup): Condition MET. originalFsPromisesRename.")
|
|
|
+ return originalFsPromisesRename(oldPath, newPath)
|
|
|
+ }
|
|
|
+ console.error("[TEST 2] Call #1: UNEXPECTED args.")
|
|
|
+ throw new Error("Unexpected args for rename call #1 in test")
|
|
|
+ } else if (renameCallCountTest2 === 2) {
|
|
|
+ // Call 2: New -> Original (Fails - this is the "original error")
|
|
|
+ if (oldPathStr.includes(".new_") && resolvedNewPath === resolvedCurrentTFP) {
|
|
|
+ console.log(
|
|
|
+ '[TEST 2] Call #2 (New->Original): Condition MET. Throwing "Simulated FS Error: new to original".',
|
|
|
+ )
|
|
|
+ throw new Error("Simulated FS Error: new to original")
|
|
|
+ }
|
|
|
+ console.error("[TEST 2] Call #2: UNEXPECTED args.")
|
|
|
+ throw new Error("Unexpected args for rename call #2 in test")
|
|
|
+ } else if (renameCallCountTest2 === 3) {
|
|
|
+ // Call 3: Backup -> Original (Rollback attempt - Fails)
|
|
|
+ if (oldPathStr.includes(".bak_") && resolvedNewPath === resolvedCurrentTFP) {
|
|
|
+ console.log(
|
|
|
+ '[TEST 2] Call #3 (Backup->Original Rollback): Condition MET. Throwing "Simulated FS Error: backup to original (rollback)".',
|
|
|
+ )
|
|
|
+ throw new Error("Simulated FS Error: backup to original (rollback)")
|
|
|
+ }
|
|
|
+ console.error("[TEST 2] Call #3: UNEXPECTED args.")
|
|
|
+ throw new Error("Unexpected args for rename call #3 in test")
|
|
|
+ }
|
|
|
+ console.error(`[TEST 2] Unexpected fs.promises.rename call count: ${renameCallCountTest2}`)
|
|
|
+ return originalFsPromisesRename(oldPath, newPath)
|
|
|
+ })
|
|
|
+
|
|
|
+ await expect(safeWriteJson(currentTestFilePath, newData)).rejects.toThrow("Simulated FS Error: new to original")
|
|
|
+
|
|
|
+ // Check that the rollback failure was logged
|
|
|
+ expect(consoleErrorSpy).toHaveBeenCalledWith(
|
|
|
+ expect.stringContaining(
|
|
|
+ `Operation failed for ${path.resolve(currentTestFilePath)}: [Original Error Caught]`,
|
|
|
+ ),
|
|
|
+ expect.objectContaining({ message: "Simulated FS Error: new to original" }), // The original error
|
|
|
+ )
|
|
|
+ expect(consoleErrorSpy).toHaveBeenCalledWith(
|
|
|
+ expect.stringMatching(/\[Catch\] Failed to restore backup .*?\.bak_.*?\s+to .*?:/), // Matches the backup filename pattern
|
|
|
+ expect.objectContaining({ message: "Simulated FS Error: backup to original (rollback)" }), // The rollback error
|
|
|
+ )
|
|
|
+ // The original error is logged first in safeWriteJson's catch block, then the rollback failure.
|
|
|
+
|
|
|
+ // File system state: original file is lost (backup couldn't be restored and was then unlinked),
|
|
|
+ // new file was cleaned up. The target path `currentTestFilePath` should not exist.
|
|
|
+ const finalState = await readJsonFile(currentTestFilePath)
|
|
|
+ expect(finalState).toBeNull()
|
|
|
+
|
|
|
+ const tempFiles = await listTempFiles(tempTestDir, "test-data.json")
|
|
|
+ // Backup file should also be cleaned up by the final unlink attempt in safeWriteJson's catch block,
|
|
|
+ // as that unlink is not mocked to fail.
|
|
|
+ expect(tempFiles.filter((f: string) => f.includes(".bak_")).length).toBe(0)
|
|
|
+ expect(tempFiles.filter((f: string) => f.includes(".new_")).length).toBe(0)
|
|
|
+
|
|
|
+ renameSpy.mockRestore()
|
|
|
+ consoleErrorSpy.mockRestore()
|
|
|
+ })
|
|
|
+})
|
KJ7LNW