async delete (url) {
    // First check if the path points to a valid file
    let path, stats
    try {
      ({ path } = await this.resourceMapper.mapUrlToFile({ url }))
      stats = await this.stat(path)
    } catch (err) {
      throw error(404, "Can't find " + err)
    }

    // If so, delete the directory or file
    if (stats.isDirectory()) {
      return this.deleteContainer(path)
    } else {
      return this.deleteResource(path)
    }
  }

  async deleteContainer (directory) {
    if (directory[ directory.length - 1 ] !== '/') {
      directory += '/'
    }

    // Ensure the container exists
    let list
    try {
      list = await promisify(fs.readdir)(directory)
    } catch (err) {
      throw error(404, 'The container does not exist')
    }

    // Ensure the container is empty (we ignore .meta and .acl)
    if (list.some(file => !file.endsWith(this.suffixMeta) && !file.endsWith(this.suffixAcl))) {
      throw error(409, 'Container is not empty')
    }

    // Delete the directory recursively
    try {
      await promisify(rimraf)(directory)
    } catch (err) {
      throw error(err, 'Failed to delete the container')
    }
  }

  // delete resource with acl and meta links
  async deleteResource (path) {
    const linkPath = this.resourceMapper._removeDollarExtension(path)
    try {
      // first delete file, then links with write permission only (atomic delete)
      await withLock(path, { mustExist: false }, () => promisify(fs.unlink)(path))

      const aclPath = `${linkPath}${this.suffixAcl}`
      if (await promisify(fs.exists)(aclPath)) {
        await withLock(aclPath, { mustExist: false }, () => promisify(fs.unlink)(aclPath))
      }
      const metaPath = `${linkPath}${this.suffixMeta}`
      if (await promisify(fs.exists)(metaPath)) {
        await withLock(metaPath, { mustExist: false }, () => promisify(fs.unlink)(metaPath))
      }
    } catch (err) {
      debug.container('DELETE -- unlink() error: ' + err)
      throw error(err, 'Failed to delete resource')
    }
  }

1 failing
  1) HTTP APIs
       POST (multipart)
         should create as many files as the ones passed in multipart:
     Error: Either the size (remote/local) don't match or files are not stored
      at Test.<anonymous> (test/integration/http-test.js:853:27)
      at Test.assert (node_modules/supertest/lib/test.js:181:6)
      at Server.localAssert (node_modules/supertest/lib/test.js:131:12)
      at emitCloseNT (net.js:1653:8)
      at processTicksAndRejections (internal/process/task_queues.js:83:21)