Adding copy sync test for src file without write perms

lib/copy-sync/__tests__/copy-sync-file.test.js

@@ -104,6 +104,23 @@ describe('+ copySync()', function () {
       })
     })
 
+    describe('> when the source file does not have write permissions', function () {
+      it('should be able to copy contents of file', function () {
+        var fileSrc = path.join(TEST_DIR, 'file.txt')
+        var fileDest = path.join(TEST_DIR, 'file-copy.txt')
+        var data = 'did it copy?'
+
+        fs.writeFileSync(fileSrc, data, 'utf8')
+        fs.chmodSync(fileSrc, '0444')
+
+        fs.copySync(fileSrc, fileDest)
+
+        var data2 = fs.readFileSync(fileDest, 'utf8')
+
+        assert.strictEqual(data, data2)
+      })
+    })
+
     describe('> when clobber option is passed', function () {
       var src, dest
       var srcData = 'some src data'