Add: fs option & tests. Closes pillarjs#160 Release 0.17.0

	* Add: new option to specify which file system to use to serve files by default.
	* Add: exported erros for basic file system interface check
	* Add: basic tests via global injection

.travis.yml

@@ -8,9 +8,9 @@ node_js:
   - "3.3"
   - "4.9"
   - "5.12"
-  - "6.15"
+  - "6.14"
   - "7.10"
-  - "8.13"
+  - "8.12"
   - "9.11"
   - "10.12"
 sudo: false

HISTORY.md

@@ -1,6 +1,13 @@
 unreleased
 ==========
 
+0.17.0 / 2018-02-07
+==========
+  * Add `fs` option
+  * test:
+    - Add test.js for programmatic testing and debugging
+    - Add `test:d` script command 
+
   * deps: depd@~2.0.0
     - Replace internal `eval` usage with `Function` constructor
     - Use instance methods on `process` to check for listeners

README.md

@@ -6,13 +6,16 @@
 [![Windows Build][appveyor-image]][appveyor-url]
 [![Test Coverage][coveralls-image]][coveralls-url]
 
+> _This is a fork of an original [send](https://github.com/pillarjs/send) module. See changes made by this fork in [history file](./HISTORY.MD#0170--2018-02-07)._
+
 Send is a library for streaming files from the file system as a http response
 supporting partial responses (Ranges), conditional-GET negotiation (If-Match,
 If-Unmodified-Since, If-None-Match, If-Modified-Since), high test coverage,
 and granular events which may be leveraged to take appropriate actions in your
 application or framework.
 
-Looking to serve up entire folders mapped to URLs? Try [serve-static](https://www.npmjs.org/package/serve-static).
+
+Looking to serve up entire folders mapped to URLs? Try [serve-static (forked version)](/serve-static).
 
 ## Installation
 
@@ -119,6 +122,15 @@ Serve files relative to `path`.
 Byte offset at which the stream starts, defaults to 0. The start is inclusive,
 meaning `start: 2` will include the 3rd byte in the stream.
 
+##### fs
+
+**Default**: [require('fs')](https://nodejs.org/api/fs.html)
+
+File system to serve files by default. 
+```js
+  send(req, path, { fs: mockedFileSystem })
+```
+
 #### Events
 
 The `SendStream` is an event emitter and will emit the following events:
@@ -171,6 +183,12 @@ $ DEBUG=send node app
 $ npm install
 $ npm test
 ```
+### Debugging tests
+In order to debug testing you can run programmatic mocha instance by command:
+```
+$ npm test:d
+```
+> _[package.json.scripts.test:d](./package.json)_
 
 ## Examples
 

index.js

@@ -20,7 +20,6 @@ var encodeUrl = require('encodeurl')
 var escapeHtml = require('escape-html')
 var etag = require('etag')
 var fresh = require('fresh')
-var fs = require('fs')
 var mime = require('mime')
 var ms = require('ms')
 var onFinished = require('on-finished')
@@ -84,6 +83,10 @@ function send (req, path, options) {
   return new SendStream(req, path, options)
 }
 
+var errors = {}
+errors.INVALID_OPTION_FS_STAT = new TypeError('Invalid option: Incompatible file system interface: fs.stat() method is expected')
+errors.INVALID_OPTION_FS_CRTSTRM = new TypeError('Invalid option: Incompatible file system interface: fs.createReadStream() method is expected')
+send.errors = errors
 /**
  * Initialize a `SendStream` with the given `path`.
  *
@@ -102,6 +105,18 @@ function SendStream (req, path, options) {
   this.path = path
   this.req = req
 
+  // Dynamically import `fs` if not it is not provided by config
+  this.fs = opts.fs || require('fs')
+
+  // Checking if provided "fs" is compatible
+  if (typeof this.fs.stat !== 'function') {
+    throw errors.INVALID_OPTION_FS_STAT
+  }
+
+  if (typeof this.fs.createReadStream !== 'function') {
+    throw errors.INVALID_OPTION_FS_CRTSTRM
+  }
+
   this._acceptRanges = opts.acceptRanges !== undefined
     ? Boolean(opts.acceptRanges)
     : true
@@ -718,7 +733,7 @@ SendStream.prototype.sendFile = function sendFile (path) {
   var self = this
 
   debug('stat "%s"', path)
-  fs.stat(path, function onstat (err, stat) {
+  this.fs.stat(path, function onstat (err, stat) {
     if (err && err.code === 'ENOENT' && !extname(path) && path[path.length - 1] !== sep) {
       // not found, check extensions
       return next(err)
@@ -739,7 +754,7 @@ SendStream.prototype.sendFile = function sendFile (path) {
     var p = path + '.' + self._extensions[i++]
 
     debug('stat "%s"', p)
-    fs.stat(p, function (err, stat) {
+    self.fs.stat(p, function (err, stat) {
       if (err) return next(err)
       if (stat.isDirectory()) return next()
       self.emit('file', p, stat)
@@ -767,7 +782,7 @@ SendStream.prototype.sendIndex = function sendIndex (path) {
     var p = join(path, self._index[i])
 
     debug('stat "%s"', p)
-    fs.stat(p, function (err, stat) {
+    self.fs.stat(p, function (err, stat) {
       if (err) return next(err)
       if (stat.isDirectory()) return next()
       self.emit('file', p, stat)
@@ -793,7 +808,7 @@ SendStream.prototype.stream = function stream (path, options) {
   var res = this.res
 
   // pipe
-  var stream = fs.createReadStream(path, options)
+  var stream = this.fs.createReadStream(path, options)
   this.emit('stream', stream)
   stream.pipe(res)
 

package.json

@@ -1,47 +1,48 @@
 {
-  "name": "send",
-  "description": "Better streaming static file server with Range and conditional-GET support",
-  "version": "0.16.2",
-  "author": "TJ Holowaychuk <tj@vision-media.ca>",
+  "name"        : "send",
+  "description" : "Better streaming static file server with Range and conditional-GET support",
+  "version"     : "0.17.0",
+  "author"      : "TJ Holowaychuk <tj@vision-media.ca>",
   "contributors": [
     "Douglas Christopher Wilson <doug@somethingdoug.com>",
     "James Wyatt Cready <jcready@gmail.com>",
-    "Jesús Leganés Combarro <piranna@gmail.com>"
+    "Jesús Leganés Combarro <piranna@gmail.com>",
+    "Davrononv Alexander Alisherovich <al.neodim@gmail.com>"
   ],
-  "license": "MIT",
+  "license"   : "MIT",
   "repository": "pillarjs/send",
-  "keywords": [
+  "keywords"  : [
     "static",
     "file",
     "server"
   ],
   "dependencies": {
-    "debug": "2.6.9",
-    "depd": "~2.0.0",
-    "destroy": "~1.0.4",
-    "encodeurl": "~1.0.2",
-    "escape-html": "~1.0.3",
-    "etag": "~1.8.1",
-    "fresh": "0.5.2",
-    "http-errors": "~1.7.1",
-    "mime": "1.6.0",
-    "ms": "2.1.1",
-    "on-finished": "~2.3.0",
+    "debug"       : "2.6.9",
+    "depd"        : "~2.0.0",
+    "destroy"     : "~1.0.4",
+    "encodeurl"   : "~1.0.2",
+    "escape-html" : "~1.0.3",
+    "etag"        : "~1.8.1",
+    "fresh"       : "0.5.2",
+    "http-errors" : "~1.7.1",
+    "mime"        : "1.6.0",
+    "ms"          : "2.1.1",
+    "on-finished" : "~2.3.0",
     "range-parser": "~1.2.0",
-    "statuses": "~1.5.0"
+    "statuses"    : "~1.5.0"
   },
   "devDependencies": {
-    "after": "0.8.2",
-    "eslint": "5.8.0",
+    "after"                 : "0.8.2",
+    "eslint"                : "5.8.0",
     "eslint-config-standard": "12.0.0",
-    "eslint-plugin-import": "2.14.0",
-    "eslint-plugin-markdown": "1.0.0-rc.1",
-    "eslint-plugin-node": "7.0.1",
-    "eslint-plugin-promise": "4.0.1",
+    "eslint-plugin-import"  : "2.14.0",
+    "eslint-plugin-markdown": "1.0.0-beta.6",
+    "eslint-plugin-node"    : "7.0.1",
+    "eslint-plugin-promise" : "4.0.1",
     "eslint-plugin-standard": "4.0.0",
-    "istanbul": "0.4.5",
-    "mocha": "5.2.0",
-    "supertest": "3.3.0"
+    "istanbul"              : "0.4.5",
+    "mocha"                 : "5.2.0",
+    "supertest"             : "3.3.0"
   },
   "files": [
     "HISTORY.md",
@@ -53,9 +54,10 @@
     "node": ">= 0.8.0"
   },
   "scripts": {
-    "lint": "eslint --plugin markdown --ext js,md .",
-    "test": "mocha --check-leaks --reporter spec --bail",
-    "test-ci": "istanbul cover node_modules/mocha/bin/_mocha --report lcovonly -- --check-leaks --reporter spec",
+    "lint"    : "eslint --plugin markdown --ext js,md .",
+    "test"    : "mocha --check-leaks --reporter spec --bail",
+    "test:d"  : "node --inspect-brk test.js",
+    "test-ci" : "istanbul cover node_modules/mocha/bin/_mocha --report lcovonly -- --check-leaks --reporter spec",
     "test-cov": "istanbul cover node_modules/mocha/bin/_mocha -- --check-leaks --reporter dot"
   }
 }

test.js

@@ -0,0 +1,15 @@
+var Mocha = require('mocha')
+var path = require('path')
+
+// Instantiate a Mocha instance.
+var mocha = new Mocha()
+
+var testDir = '/test/'
+mocha.addFile(
+  path.join(__dirname, testDir, 'send.js')
+)
+// Run the tests.
+mocha.run(function (failures) {
+  // exit with non-zero status if there were failures
+  process.exitCode = failures ? 1 : 0
+})

test/send.js

@@ -1418,6 +1418,37 @@ describe('send(file, options)', function () {
       })
     })
   })
+
+  describe('fs', function () {
+    var FS_STAT = send.errors.INVALID_OPTION_FS_STAT
+    var CRTSTRM = send.errors.INVALID_OPTION_FS_CRTSTRM
+    it('must provide fs.stat()', function (done) {
+      try {
+        send(void 0, '', { fs: { createReadStream: function () {} } })
+      } catch (err) {
+        if (err === FS_STAT) {
+          done()
+        } else {
+          done(new Error('Must throw INVALID_OPTION_FS_STAT'))
+        }
+        return
+      }
+      done()
+    })
+    it('must implement fs.createReadStream()', function (done) {
+      try {
+        send(void 0, '', { fs: { stat: function () {} } })
+      } catch (err) {
+        if (err === CRTSTRM) {
+          done()
+        } else {
+          done(new Error('Must throw INVALID_OPTION_FS_CRTSTRM'))
+        }
+        return
+      }
+      done()
+    })
+  })
 })
 
 describe('send.mime', function () {