Create fixture symlinks as junctions if pointing at directories

docs/src/content/docs/api/fixtures/index.md

@@ -34,6 +34,8 @@ this:
 const dir = t.testdir({
   'some-file': 'some contents',
   // use t.fixture() to create links and symlinks
+  // this will use junctions on Windows as of v14.11.0 if the
+  // target is a directory, so Administrator perms aren't needed.
   link: t.fixture('symlink', 'some-file'),
   nested: {
     'README.md': 'nested dirs work, too!'

lib/fixture.js

@@ -1,4 +1,4 @@
-const {writeFileSync, linkSync, symlinkSync} = require('fs')
+const {writeFileSync, linkSync, statSync, symlinkSync} = require('fs')
 const {resolve, dirname} = require('path')
 const mkdirp = require('mkdirp')
 
@@ -29,30 +29,51 @@ class Fixture {
     return 'Fixture<' + this.type + '>'
   }
 
-  static make (abs, f) {
+  // have to gather up symlinks for the end
+  static make (abs, f, symlinks = null) {
     if (typeof f === 'string' || Buffer.isBuffer(f))
       f = new Fixture('file', f)
     else if (f && typeof f === 'object' && !(f instanceof Fixture))
       f = new Fixture('dir', f)
     else if (!(f instanceof Fixture))
       throw new Error('invalid fixture type: ' + f)
 
+    const isRoot = symlinks === null
+    symlinks = symlinks || {}
+
     switch (f.type) {
       case 'symlink':
-        symlinkSync(f.content, abs)
+        // have to gather up symlinks for the end, because windows
+        symlinks[abs] = f.content
         break
       case 'link':
         linkSync(resolve(dirname(abs), f.content), abs)
         break
       case 'dir':
         mkdirp.sync(abs)
         for (const [name, fixture] of Object.entries(f.content))
-          Fixture.make(`${abs}/${name}`, fixture)
+          Fixture.make(`${abs}/${name}`, fixture, symlinks)
         break
       case 'file':
         writeFileSync(abs, f.content)
         break
     }
+
+    // create all those symlinks we were asked for
+    if (isRoot) {
+      for (const [abs, target] of Object.entries(symlinks)) {
+        symlinkSync(target, abs, isDir(abs, target) ? 'junction' : 'file')
+      }
+    }
+  }
+}
+
+// check if a symlink target is a directory
+const isDir = (abs, target) => {
+  try {
+    return statSync(resolve(dirname(abs), target)).isDirectory()
+  } catch (er) {
+    return false
   }
 }
 

test/fixture.js

@@ -2,6 +2,8 @@ const t = require('../')
 const Fixture = require('../lib/fixture.js')
 
 const dir = t.testdirName
+require('rimraf').sync(dir)
+
 const f = new Fixture('file', 'bar')
 t.match(f, {
   type: 'file',
@@ -33,9 +35,12 @@ t.throws(() => new Fixture('file'), {
 
 Fixture.make(dir, {
   file: 'content',
+  dir: {},
   symlink: new Fixture('symlink', 'file'),
+  dirlink: new Fixture('symlink', 'dir'),
   link: new Fixture('link', 'file'),
   dir: new Fixture('dir', {}),
+  noexist: new Fixture('symlink', 'non-existent-file'),
 })
 const fs = require('fs')
 t.ok(fs.statSync(dir).isDirectory(), 'dir is a dir')
@@ -44,4 +49,5 @@ t.match(fs.statSync(`${dir}/link`), fs.statSync(`${dir}/file`),
   'hardlink is hard link')
 t.equal(fs.readlinkSync(`${dir}/symlink`), 'file', 'symlink is symlink')
 t.ok(fs.statSync(`${dir}/dir`).isDirectory(), 'subdir is a dir')
+
 require('rimraf').sync(dir)