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copy-prevent-copying-identical.test.js
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copy-prevent-copying-identical.test.js
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'use strict'
const assert = require('assert')
const os = require('os')
const path = require('path')
const fs = require(process.cwd())
const klawSync = require('klaw-sync')
/* global beforeEach, afterEach, describe, it */
describe('+ copySync() - prevent copying identical files and dirs', () => {
let TEST_DIR = ''
let src = ''
let dest = ''
beforeEach(done => {
TEST_DIR = path.join(os.tmpdir(), 'fs-extra', 'copy-sync-prevent-copying-identical')
fs.emptyDir(TEST_DIR, done)
})
afterEach(done => fs.remove(TEST_DIR, done))
it('should return an error if src and dest are the same', done => {
const fileSrc = path.join(TEST_DIR, 'TEST_fs-extra_copy_sync')
const fileDest = path.join(TEST_DIR, 'TEST_fs-extra_copy_sync')
fs.copy(fileSrc, fileDest, err => {
assert.equal(err.message, 'Source and destination must not be the same.')
done()
})
})
// src is directory:
// src is regular, dest is symlink
// src is symlink, dest is regular
// src is symlink, dest is symlink
describe('> when the source is a directory', () => {
describe(`>> when src is regular and dest is a symlink that points to src`, () => {
it('should not copy and return', done => {
src = path.join(TEST_DIR, 'src')
fs.mkdirsSync(src)
const subdir = path.join(TEST_DIR, 'src', 'subdir')
fs.mkdirsSync(subdir)
fs.writeFileSync(path.join(subdir, 'file.txt'), 'some data')
const destLink = path.join(TEST_DIR, 'dest-symlink')
fs.symlinkSync(src, destLink, 'dir')
const oldlen = klawSync(src).length
fs.copy(src, destLink, err => {
assert.ifError(err)
const newlen = klawSync(src).length
assert.strictEqual(newlen, oldlen)
const link = fs.readlinkSync(destLink)
assert.strictEqual(link, src)
done()
})
})
})
describe(`>> when src is a symlink that points to a regular dest`, () => {
it('should not copy and return', done => {
dest = path.join(TEST_DIR, 'dest')
fs.mkdirsSync(dest)
const subdir = path.join(TEST_DIR, 'dest', 'subdir')
fs.mkdirsSync(subdir)
fs.writeFileSync(path.join(subdir, 'file.txt'), 'some data')
const srcLink = path.join(TEST_DIR, 'src-symlink')
fs.symlinkSync(dest, srcLink, 'dir')
const oldlen = klawSync(dest).length
fs.copy(srcLink, dest, err => {
assert.ifError(err)
// assert nothing copied
const newlen = klawSync(dest).length
assert.strictEqual(newlen, oldlen)
const link = fs.readlinkSync(srcLink)
assert.strictEqual(link, dest)
done()
})
})
})
describe('>> when src and dest are symlinks that point to the exact same path', () => {
it('should not copy and return', done => {
src = path.join(TEST_DIR, 'src')
fs.mkdirsSync(src)
const srcLink = path.join(TEST_DIR, 'src_symlink')
fs.symlinkSync(src, srcLink, 'dir')
const destLink = path.join(TEST_DIR, 'dest_symlink')
fs.symlinkSync(src, destLink, 'dir')
const srclenBefore = klawSync(srcLink).length
const destlenBefore = klawSync(destLink).length
fs.copy(srcLink, destLink, err => {
assert.ifError(err)
const srclenAfter = klawSync(srcLink).length
assert.strictEqual(srclenAfter, srclenBefore, 'src length should not change')
const destlenAfter = klawSync(destLink).length
assert.strictEqual(destlenAfter, destlenBefore, 'dest length should not change')
const srcln = fs.readlinkSync(srcLink)
assert.strictEqual(srcln, src)
const destln = fs.readlinkSync(destLink)
assert.strictEqual(destln, src)
done()
})
})
})
})
// src is file:
// src is regular, dest is symlink
// src is symlink, dest is regular
// src is symlink, dest is symlink
describe('> when the source is a file', () => {
describe(`>> when src is regular and dest is a symlink that points to src`, () => {
it('should not copy and return', done => {
src = path.join(TEST_DIR, 'src', 'somefile.txt')
fs.ensureFileSync(src)
fs.writeFileSync(src, 'some data')
const destLink = path.join(TEST_DIR, 'dest-symlink')
fs.symlinkSync(src, destLink, 'file')
fs.copy(src, destLink, err => {
assert.ifError(err)
const link = fs.readlinkSync(destLink)
assert.strictEqual(link, src)
assert(fs.readFileSync(link, 'utf8'), 'some data')
done()
})
})
})
describe(`>> when src is a symlink that points to a regular dest`, () => {
it('should not copy and return', done => {
dest = path.join(TEST_DIR, 'dest', 'somefile.txt')
fs.ensureFileSync(dest)
fs.writeFileSync(dest, 'some data')
const srcLink = path.join(TEST_DIR, 'src-symlink')
fs.symlinkSync(dest, srcLink, 'file')
fs.copy(srcLink, dest, err => {
assert.ifError(err)
const link = fs.readlinkSync(srcLink)
assert.strictEqual(link, dest)
assert(fs.readFileSync(link, 'utf8'), 'some data')
done()
})
})
})
describe('>> when src and dest are symlinks that point to the exact same path', () => {
it('should not copy and return', done => {
src = path.join(TEST_DIR, 'src', 'srcfile.txt')
fs.ensureFileSync(src)
fs.writeFileSync(src, 'src data')
const srcLink = path.join(TEST_DIR, 'src_symlink')
fs.symlinkSync(src, srcLink, 'file')
const destLink = path.join(TEST_DIR, 'dest_symlink')
fs.symlinkSync(src, destLink, 'file')
fs.copy(srcLink, destLink, err => {
assert.ifError(err)
const srcln = fs.readlinkSync(srcLink)
assert.strictEqual(srcln, src)
const destln = fs.readlinkSync(destLink)
assert.strictEqual(destln, src)
assert(fs.readFileSync(srcln, 'utf8'), 'src data')
assert(fs.readFileSync(destln, 'utf8'), 'src data')
done()
})
})
})
})
})