throw error if src and dest are the same to avoid zeroing out + test

jprichardson · Mar 15, 2016 · 4df3d35 · 4df3d35
1 parent 2b72bc3
commit 4df3d35
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diff --git a/lib/copy/__tests__/copy.test.js b/lib/copy/__tests__/copy.test.js
@@ -21,6 +21,16 @@ describe('fs-extra', function () {
   })
 
   describe('+ copy()', function () {
+
+    it('should return an error if src and dest are the same', function (done) {
+      var fileSrc = path.join(TEST_DIR, 'TEST_fs-extra_copy')
+      var fileDest = path.join(TEST_DIR, 'TEST_fs-extra_copy')
+      fse.copy(fileSrc, fileDest, function (err) {
+        assert.equal(err.message, 'Source and destination must not be the same.')
+        done()
+      })
+    })
+
     describe('> when the source is a file', function () {
       it('should copy the file asynchronously', function (done) {
         var fileSrc = path.join(TEST_DIR, 'TEST_fs-extra_src')

diff --git a/lib/copy/copy.js b/lib/copy/copy.js
@@ -13,6 +13,12 @@ function copy (src, dest, options, callback) {
   callback = callback || function () {}
   options = options || {}
 
+  // don't allow src and dest to be the same
+  var basePath = process.cwd()
+  var currentPath = path.resolve(basePath, src)
+  var targetPath = path.resolve(basePath, dest)
+  if ( currentPath === targetPath ) return callback( new Error('Source and destination must not be the same.'))
+
   fs.lstat(src, function (err, stats) {
     if (err) return callback(err)