From 5ced5d293445a7fcbec52ef1654edf1c6ecf35ec Mon Sep 17 00:00:00 2001
From: Alex Indigo <iam@alexindigo.com>
Date: Sun, 11 Oct 2015 16:33:36 -0700
Subject: [PATCH 1/4] Added support for dotted keys.

---
 lib/index.js | 32 +++++++++++++++++++++++++++-----
 1 file changed, 27 insertions(+), 5 deletions(-)

diff --git a/lib/index.js b/lib/index.js
index db30c4c..857a7d0 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -74,13 +74,36 @@ File.prototype.set = function(key, value) {
 
 // Has a callback, but is NOT async
 File.prototype._resolve = function(key, callback) {
-	var current = this.data;
-	var keys = key.split('.');
-	key = keys.pop();
+  var current, parseable, keys, lastKey;
+
+  // init top node
+  this.data = this.data || {};
+
+  // get slider reference
+	current = this.data;
+
+  // separate for traversable and non-traversable parts
+  parseable = key.split(/\[(.*)\]/, 2);
+
+  // get traversable keys
+  keys = parseable[0].split('.');
+
+  // last key or non-traversable part
+  lastKey = parseable[1] || keys.pop();
+
+  // traverse
 	keys.forEach(function(key) {
+
+    // if key doesn't exist (or not referencing object), create it as empty object
+    if (typeof current[key] != 'object') {
+      current[key] = {};
+    }
+
+    // go deeper
 		current = current[key];
 	});
-	return callback(current, key, current[key]);
+
+	return callback(current, lastKey, current[lastKey]);
 };
 
 // ------------------------------------------------------------------
@@ -101,4 +124,3 @@ function determineWhitespace(contents) {
 		}
 	}
 }
-

From 617330cc9fad5b45bfadb6b1665b14ffcd30aab1 Mon Sep 17 00:00:00 2001
From: Alex Indigo <iam@alexindigo.com>
Date: Tue, 13 Oct 2015 19:03:47 -0700
Subject: [PATCH 2/4] Migrated from json-file.

---
 .editorconfig      |  10 ++++
 .eslintrc          |  22 ++++++++
 .gitignore         |   3 ++
 .npmignore         |   4 ++
 .travis.yml        |   6 +++
 index.js           | 128 +++++++++++++++++++++++++++++++++++++++++++++
 lib/index.js       | 126 --------------------------------------------
 package.json       |  27 ++++++----
 readme.md          |  11 ++--
 test.js            |  44 ++++++++++++++++
 test/expected.json |  13 +++++
 test/input.json    |  10 ++++
 test/tmp/.keep     |   0
 13 files changed, 264 insertions(+), 140 deletions(-)
 create mode 100644 .editorconfig
 create mode 100644 .eslintrc
 create mode 100644 .gitignore
 create mode 100644 .npmignore
 create mode 100644 .travis.yml
 create mode 100644 index.js
 delete mode 100644 lib/index.js
 create mode 100644 test.js
 create mode 100644 test/expected.json
 create mode 100644 test/input.json
 create mode 100644 test/tmp/.keep

diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..0f09989
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,10 @@
+# editorconfig.org
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
diff --git a/.eslintrc b/.eslintrc
new file mode 100644
index 0000000..e26ff63
--- /dev/null
+++ b/.eslintrc
@@ -0,0 +1,22 @@
+{
+  "rules": {
+    "indent": [2, 2],
+    "quotes": [2, "single"],
+    "linebreak-style": [2, "unix"],
+    "semi": [2, "always"],
+    "curly": [2, "multi-line"],
+    "handle-callback-err": [2, "^err"],
+    "strict": 0,
+    "eqeqeq": 0,
+    "eol-last": 0,
+    "dot-notation": 0,
+    "no-mixed-requires": 0,
+    "no-multi-spaces": 0,
+    "no-use-before-define": 0,
+    "no-underscore-dangle": 0
+  },
+  "env": {
+    "node": true,
+    "browser": true
+  }
+}
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..9376d71
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+node_modules/
+test/tmp/*.json
+*.log
diff --git a/.npmignore b/.npmignore
new file mode 100644
index 0000000..94845ae
--- /dev/null
+++ b/.npmignore
@@ -0,0 +1,4 @@
+node_modules/
+test/
+test.js
+*.log
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..9ccb608
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,6 @@
+sudo: false
+language: node_js
+node_js:
+  - "0.10"
+  - "0.12"
+  - "iojs"
diff --git a/index.js b/index.js
new file mode 100644
index 0000000..fb98527
--- /dev/null
+++ b/index.js
@@ -0,0 +1,128 @@
+var fs   = require('fs');
+var path = require('path');
+var findWhitespace = /^(\s+)/;
+
+
+
+var File = exports.File = function(filePath) {
+  this.path = path.normalize(filePath);
+};
+
+exports.read = function(filePath, callback) {
+  var file = new File(filePath);
+  if (callback) {
+    file.read(callback);
+  } else {
+    file.readSync();
+  }
+  return file;
+};
+
+File.prototype.data = undefined;
+File.prototype.indent = null;
+
+// ------------------------------------------------------------------
+//  File I/O
+
+File.prototype.read = function(callback) {
+  fs.readFile(this.path, 'utf8', this._afterRead.bind(this, callback));
+};
+
+File.prototype._afterRead = function(callback, err, json) {
+  if (err) {
+    return callback(err);
+  }
+  this._processJson(json);
+  callback();
+};
+
+File.prototype.readSync = function(callback) {
+  this._processJson(
+    fs.readFileSync(this.path, 'utf8')
+  );
+};
+
+File.prototype._processJson = function(json) {
+  this.data = JSON.parse(json);
+  this.indent = determineWhitespace(json);
+};
+
+File.prototype.write = function(callback, replacer, space) {
+  var space = space || this.indent,
+    json = JSON.stringify(this.data, replacer, space);
+  fs.writeFile(this.path, json, callback);
+};
+
+File.prototype.writeSync = function(replacer, space) {
+  var space = space || this.indent,
+    json = JSON.stringify(this.data, replacer, space);
+  fs.writeFileSync(this.path, json);
+};
+
+// ------------------------------------------------------------------
+//  Property editing
+
+File.prototype.get = function(key) {
+  return this._resolve(key, function(scope, key, value) {
+    return value;
+  });
+};
+
+File.prototype.set = function(key, value) {
+  this._resolve(key, function(scope, key) {
+    scope[key] = value;
+  });
+  return this;
+};
+
+// Has a callback, but is NOT async
+File.prototype._resolve = function(key, callback) {
+  var current, parseable, keys, lastKey;
+
+  // init top node
+  this.data = this.data || {};
+
+  // get slider reference
+  current = this.data;
+
+  // separate for traversable and non-traversable parts
+  parseable = key.split(/\[(.*)\]/, 2);
+
+  // get traversable keys
+  keys = parseable[0] ? parseable[0].split('.') : [];
+
+  // last key or non-traversable part
+  lastKey = parseable[1] || keys.pop();
+
+  // traverse
+  keys.forEach(function(key) {
+
+    // if key doesn't exist (or not referencing object), create it as empty object
+    if (typeof current[key] != 'object') {
+      current[key] = {};
+    }
+
+    // go deeper
+    current = current[key];
+  });
+
+  return callback(current, lastKey, current[lastKey]);
+};
+
+// ------------------------------------------------------------------
+
+function determineWhitespace(contents) {
+  var whitespace = 0;
+  contents = contents.split('\n');
+  for (var i = 0, c = contents.length; i < c; i++) {
+    var match = findWhitespace.exec(contents);
+    if (match && typeof match[1] === 'string') {
+      if (match[1][0] === '\t') {
+        whitespace = '\t';
+        break;
+      } else if (match[1].length < whitespace || ! whitespace) {
+        whitespace = match[1].length;
+      }
+    }
+  }
+}
diff --git a/lib/index.js b/lib/index.js
deleted file mode 100644
index 857a7d0..0000000
--- a/lib/index.js
+++ /dev/null
@@ -1,126 +0,0 @@
-
-var fs    = require('fs');
-var path  = require('path');
-
-var File = exports.File = function(filePath) {
-	this.indent  = null;
-	this.data    = void(0);
-	this.path    = path.normalize(filePath);
-};
-
-exports.read = function(filePath, callback) {
-	var file = new File(filePath);
-	if (callback) {
-		file.read(callback);
-	} else {
-		file.readSync();
-	}
-	return file;
-};
-
-// ------------------------------------------------------------------
-//  File I/O
-
-File.prototype.read = function(callback) {
-	fs.readFile(this.path, 'utf8', this._afterRead.bind(this, callback));
-};
-
-File.prototype._afterRead = function(callback, err, json) {
-	if (err) {
-		return callback(err);
-	}
-	this._processJson(json);
-	callback();
-};
-
-File.prototype.readSync = function(callback) {
-	this._processJson(
-		fs.readFileSync(this.path, 'utf8')
-	);
-};
-
-File.prototype._processJson = function(json) {
-	this.data = JSON.parse(json);
-	this.indent = determineWhitespace(json);
-};
-
-File.prototype.write = function(callback, replacer, space) {
-	var space = space || this.indent,
-		json = JSON.stringify(this.data, replacer, space);
-	fs.writeFile(this.path, json, callback);
-};
-
-File.prototype.writeSync = function(replacer, space) {
-	var space = space || this.indent,
-		json = JSON.stringify(this.data, replacer, space);
-	fs.writeFileSync(this.path, json);
-};
-
-// ------------------------------------------------------------------
-//  Property editing
-
-File.prototype.get = function(key) {
-	return this._resolve(key, function(scope, key, value) {
-		return value;
-	});
-};
-
-File.prototype.set = function(key, value) {
-	this._resolve(key, function(scope, key) {
-		scope[key] = value;
-	});
-	return this;
-};
-
-// Has a callback, but is NOT async
-File.prototype._resolve = function(key, callback) {
-  var current, parseable, keys, lastKey;
-
-  // init top node
-  this.data = this.data || {};
-
-  // get slider reference
-	current = this.data;
-
-  // separate for traversable and non-traversable parts
-  parseable = key.split(/\[(.*)\]/, 2);
-
-  // get traversable keys
-  keys = parseable[0].split('.');
-
-  // last key or non-traversable part
-  lastKey = parseable[1] || keys.pop();
-
-  // traverse
-	keys.forEach(function(key) {
-
-    // if key doesn't exist (or not referencing object), create it as empty object
-    if (typeof current[key] != 'object') {
-      current[key] = {};
-    }
-
-    // go deeper
-		current = current[key];
-	});
-
-	return callback(current, lastKey, current[lastKey]);
-};
-
-// ------------------------------------------------------------------
-
-var findWhitespace = /^(\s+)/;
-function determineWhitespace(contents) {
-	var whitespace = 0;
-	contents = contents.split('\n');
-	for (var i = 0, c = contents.length; i < c; i++) {
-		var match = findWhitespace.exec(contents);
-		if (match && typeof match[1] === 'string') {
-			if (match[1][0] === '\t') {
-				whitespace = '\t';
-				break;
-			} else if (match[1].length < whitespace || ! whitespace) {
-				whitespace = match[1].length;
-			}
-		}
-	}
-}
diff --git a/package.json b/package.json
index 7bf6217..c0f4820 100644
--- a/package.json
+++ b/package.json
@@ -1,20 +1,29 @@
 {
-  "name": "json-file",
-  "version": "0.1.0",
-  "description": "A module for modifiying JSON files",
-  "main": "lib/index.js",
+  "name": "jsonfile2",
+  "version": "2.0.0",
+  "description": "A module for modifying JSON files (extended from npm.org/json-file)",
+  "main": "index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "node test.js",
+    "lint": "eslint -c .eslintrc *.js"
   },
+  "pre-commit": [
+    "lint",
+    "test"
+  ],
   "repository": {
     "type": "git",
-    "url": "git://github.com/UmbraEngineering/json-file"
+    "url": "git://github.com/alexindigo/jsonfile2"
   },
   "keywords": [
     "json",
     "file",
-    "i/o"
+    "keys"
   ],
-  "author": "James Brumond",
-  "license": "MIT"
+  "author": "Alex Indigo <iam@alexindigo.com>",
+  "license": "MIT",
+  "devDependencies": {
+    "eslint": "^1.6.0",
+    "pre-commit": "^1.1.1"
+  }
 }
diff --git a/readme.md b/readme.md
index c2582b2..0239ca1 100644
--- a/readme.md
+++ b/readme.md
@@ -1,17 +1,17 @@
-# json-file
+# jsonfile2
 
-A Node.js module for reading/modifying/writing JSON files.
+A Node.js module for reading/modifying/writing JSON files. Based on (json-file)[http://www.npmjs.com/package/json-file].
 
 ## Install
 
 ```bash
-$ npm install json-file
+$ npm install --save jsonfile2
 ```
 
 ## Usage
 
 ```javascript
-var json = require('json-file');
+var json = require('jsonfile2');
 
 // Load a JSON file
 var file = json.read('./package.json');
@@ -99,6 +99,7 @@ Get a value from the JSON data.
 ```javascript
 file.get('foo'); // === file.data['foo']
 file.get('foo.bar.baz'); // === file.data['foo']['bar']['baz']
+file.get('foo[bar.baz]'); // === file.data['foo']['bar.baz']
 ```
 
 #### File::set ( Mixed key, Mixed value )
@@ -108,6 +109,7 @@ Set a value in the JSON data.
 ```javascript
 file.set('foo', 'bar');
 file.set('a.b.c', 'baz');
+file.set('a[b.c]', 'baz');
 ```
 
 The `set` method returns the file object itself, so this method can be chained.
@@ -117,4 +119,3 @@ file.set('a', 'foo')
     .set('b', 'bar')
     .set('c', 'baz');
 ```
-
diff --git a/test.js b/test.js
new file mode 100644
index 0000000..a2bf9a3
--- /dev/null
+++ b/test.js
@@ -0,0 +1,44 @@
+var json       = require('./')
+  , assert     = require('assert')
+  , inputFile  = './test/input.json'
+  , outputFile = './test/tmp/output.json'
+  , expected   = require('./test/expected.json')
+  , input      = require(inputFile)
+  , inFile     = new json.File(inputFile)
+  , outFile    = new json.File(outputFile)
+  , doneInput  = false
+  , doneOutput = false
+  ;
+
+// Input tests
+inFile.read(function()
+{
+  assert.deepEqual(input.foo, inFile.get('foo'));
+  assert.deepEqual(input.foo.bar.baz, inFile.get('foo.bar.baz'));
+  assert.deepEqual(input.foo['bar.baz'], inFile.get('foo[bar.baz]'));
+  doneInput = true;
+});
+
+// Output tests
+outFile.set('foo', 'bar');
+outFile.set('a.b.c', 'baz');
+outFile.set('a[b.c]', 'baz');
+
+outFile.set('x', 'foo for x')
+      .set('y', 'bar for y')
+      .set('z', 'baz for z')
+      .set('[x.y.z]', 'boom for [x.y.z]')
+      ;
+
+outFile.write(function()
+{
+  // done writing, compare
+  assert.deepEqual(expected, require(outputFile));
+  doneOutput = true;
+});
+
+process.on('exit', function()
+{
+  assert.ok(doneInput, 'input tests has not passed');
+  assert.ok(doneOutput, 'output tests has not passed');
+});
diff --git a/test/expected.json b/test/expected.json
new file mode 100644
index 0000000..c45d05c
--- /dev/null
+++ b/test/expected.json
@@ -0,0 +1,13 @@
+{
+  "foo": "bar",
+  "a": {
+    "b": {
+      "c": "baz"
+    },
+    "b.c": "baz"
+  },
+  "x": "foo for x",
+  "y": "bar for y",
+  "z": "baz for z",
+  "x.y.z": "boom for [x.y.z]"
+}
diff --git a/test/input.json b/test/input.json
new file mode 100644
index 0000000..ba06874
--- /dev/null
+++ b/test/input.json
@@ -0,0 +1,10 @@
+{
+  "foo":
+  {
+    "bar":
+    {
+      "baz": "value of foo.bar.baz"
+    },
+    "bar.baz": "value of foo.['bar.baz']"
+  }
+}
diff --git a/test/tmp/.keep b/test/tmp/.keep
new file mode 100644
index 0000000..e69de29

From 7746283e832ed0b548ccc98df52d6c48d54ca58f Mon Sep 17 00:00:00 2001
From: Alex Indigo <iam@alexindigo.com>
Date: Tue, 13 Oct 2015 19:10:28 -0700
Subject: [PATCH 3/4] Fixed README. Added travis badge.

---
 package.json | 2 +-
 readme.md    | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/package.json b/package.json
index c0f4820..cc67c59 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "jsonfile2",
-  "version": "2.0.0",
+  "version": "2.0.1",
   "description": "A module for modifying JSON files (extended from npm.org/json-file)",
   "main": "index.js",
   "scripts": {
diff --git a/readme.md b/readme.md
index 0239ca1..838c514 100644
--- a/readme.md
+++ b/readme.md
@@ -1,6 +1,8 @@
 # jsonfile2
 
-A Node.js module for reading/modifying/writing JSON files. Based on (json-file)[http://www.npmjs.com/package/json-file].
+A Node.js module for reading/modifying/writing JSON files. Based on [json-file](http://www.npmjs.com/package/json-file]).
+
+[![Build Status](https://travis-ci.org/alexindigo/jsonfile2.svg)](https://travis-ci.org/alexindigo/jsonfile2)
 
 ## Install
 

From 6d916be8e2d0c29fdbe2899db8c164052ce32fbb Mon Sep 17 00:00:00 2001
From: Alex Indigo <iam@alexindigo.com>
Date: Tue, 13 Oct 2015 21:24:47 -0700
Subject: [PATCH 4/4] Added update and del methods.

---
 index.js     | 51 +++++++++++++++++++++++++++++++++++++++++----
 package.json |  4 ++--
 readme.md    | 58 +++++++++++++++++++++++++++++++++++++++++++---------
 test.js      | 54 ++++++++++++++++++++++++++++++++++++++++++++----
 4 files changed, 147 insertions(+), 20 deletions(-)

diff --git a/index.js b/index.js
index fb98527..465a377 100644
--- a/index.js
+++ b/index.js
@@ -1,9 +1,7 @@
-var fs   = require('fs');
+var fs = require('fs');
 var path = require('path');
 var findWhitespace = /^(\s+)/;
 
-
-
 var File = exports.File = function(filePath) {
   this.path = path.normalize(filePath);
 };
@@ -24,6 +22,38 @@ File.prototype.indent = null;
 // ------------------------------------------------------------------
 //  File I/O
 
+/**
+ * Combines read/write method and creates new file
+ * if one doesn't exist
+ *
+ * @param {function} callback - invoked when file's been read into object
+ */
+File.prototype.update = function(callback) {
+  this.read(function(err, json) {
+    // ignore nonexistent file error
+    if (err && err.code != 'ENOENT') {
+      return callback.call(this, err);
+    }
+
+    // invoke callback within file instance
+    // with `write` function as `save` callback
+    callback.call(this, null, this.write.bind(this));
+  }.bind(this));
+};
+
+File.prototype.updateSync = function(callback) {
+  var content;
+
+  try {
+    content = fs.readFileSync(this.path, 'utf8');
+  } catch (e) {
+    if (e.code != 'ENOENT') throw e;
+    content = '{}';
+  }
+
+  this._processJson(content);
+};
+
 File.prototype.read = function(callback) {
   fs.readFile(this.path, 'utf8', this._afterRead.bind(this, callback));
 };
@@ -36,7 +66,7 @@ File.prototype._afterRead = function(callback, err, json) {
   callback();
 };
 
-File.prototype.readSync = function(callback) {
+File.prototype.readSync = function() {
   this._processJson(
     fs.readFileSync(this.path, 'utf8')
   );
@@ -75,6 +105,19 @@ File.prototype.set = function(key, value) {
   return this;
 };
 
+/**
+ * Remove key from the object
+ *
+ * @param   {mixed} key - key to delete
+ * @returns {File} returns itself for chaining
+ */
+File.prototype.del = function(key) {
+  this._resolve(key, function(scope, key) {
+    delete scope[key];
+  });
+  return this;
+};
+
 // Has a callback, but is NOT async
 File.prototype._resolve = function(key, callback) {
   var current, parseable, keys, lastKey;
diff --git a/package.json b/package.json
index cc67c59..f38f056 100644
--- a/package.json
+++ b/package.json
@@ -1,10 +1,10 @@
 {
   "name": "jsonfile2",
-  "version": "2.0.1",
+  "version": "2.1.0",
   "description": "A module for modifying JSON files (extended from npm.org/json-file)",
   "main": "index.js",
   "scripts": {
-    "test": "node test.js",
+    "test": "cp test/input.json test/tmp/update.json && node test.js",
     "lint": "eslint -c .eslintrc *.js"
   },
   "pre-commit": [
diff --git a/readme.md b/readme.md
index 838c514..b665428 100644
--- a/readme.md
+++ b/readme.md
@@ -46,13 +46,13 @@ file.readSync();
 
 // Likewise, this...
 var file = json.read('/a/b/c', function() {
-	// ...
+  // ...
 });
 
 // Is equivilent to this...
 var file = new json.File('/a/b/c');
 file.read(function() {
-	// ...
+  // ...
 });
 ```
 #### json.File ( String filePath )
@@ -68,10 +68,8 @@ var file = new json.File('/path/to/file.json');
 Reads the JSON file and parses the contents.
 
 ```javascript
-file.read(function() {
-	//
-	// Now you can do things like use the .get() and .set() methods
-	//
+file.read(function(err) {
+  // Now you can do things like use the .get() and .set() methods
 });
 ```
 #### File::readSync ( void )
@@ -83,10 +81,8 @@ Reads the JSON file and parses the contents synchronously.
 Write the new contents back to the file.
 
 ```javascript
-file.write(function() {
-	//
-	// Your JSON file has been updated
-	//
+file.write(function(err) {
+  // Your JSON file has been updated
 });
 ```
 
@@ -94,6 +90,38 @@ file.write(function() {
 
 Write the new contents back to the file synchronously.
 
+#### File::update ( Function callback )
+
+Reads the JSON file and parses the contents,
+will not error if file doesn't exist.
+In that case file will be created upon save.
+All other errors will propagate.
+
+*Note: `callback` function will be called within context of the jsonFile object.*
+
+```javascript
+file.update(function(err, save) {
+  // Now you can do things like use the .get() and .set() methods
+  this.get('a.b');
+  this.set('[c.d]', 25);
+  save();
+});
+```
+#### File::updateSync ( void )
+
+Reads the JSON file and parses the contents synchronously,
+same as async sibling doesn't throw on non-existent file.
+(Will throw on all other errors).
+
+```javascript
+file.updateSync();
+// Now you can do things like use the .get() and .set() methods
+file.get('a.b');
+file.set('[c.d]', 25);
+
+file.writeSync();
+```
+
 #### File::get ( Mixed key )
 
 Get a value from the JSON data.
@@ -104,6 +132,16 @@ file.get('foo.bar.baz'); // === file.data['foo']['bar']['baz']
 file.get('foo[bar.baz]'); // === file.data['foo']['bar.baz']
 ```
 
+#### File::del ( Mixed key )
+
+Delete a key from the JSON data.
+
+```javascript
+file.del('foo'); // file.data['foo'] branch will be removed
+file.del('foo.bar.baz'); // file.data['foo']['bar']['baz'] node will be removed
+file.del('foo[bar.baz]'); // file.data['foo']['bar.baz'] node will be removed
+```
+
 #### File::set ( Mixed key, Mixed value )
 
 Set a value in the JSON data.
diff --git a/test.js b/test.js
index a2bf9a3..73073d5 100644
--- a/test.js
+++ b/test.js
@@ -2,17 +2,21 @@ var json       = require('./')
   , assert     = require('assert')
   , inputFile  = './test/input.json'
   , outputFile = './test/tmp/output.json'
+  , updateFile = './test/tmp/update.json'
   , expected   = require('./test/expected.json')
   , input      = require(inputFile)
   , inFile     = new json.File(inputFile)
   , outFile    = new json.File(outputFile)
+  , upFile     = new json.File(updateFile)
   , doneInput  = false
   , doneOutput = false
+  , doneUpdate = false
   ;
 
 // Input tests
-inFile.read(function()
+inFile.read(function(err)
 {
+  assert.ifError(err);
   assert.deepEqual(input.foo, inFile.get('foo'));
   assert.deepEqual(input.foo.bar.baz, inFile.get('foo.bar.baz'));
   assert.deepEqual(input.foo['bar.baz'], inFile.get('foo[bar.baz]'));
@@ -30,15 +34,57 @@ outFile.set('x', 'foo for x')
       .set('[x.y.z]', 'boom for [x.y.z]')
       ;
 
-outFile.write(function()
+outFile.write(function(err)
 {
+  assert.ifError(err);
   // done writing, compare
   assert.deepEqual(expected, require(outputFile));
   doneOutput = true;
 });
 
+// Update tests
+upFile.update(function(err, save)
+{
+  assert.ifError(err);
+
+  assert.deepEqual(input.foo, this.get('foo'));
+  assert.deepEqual(input.foo.bar.baz, this.get('foo.bar.baz'));
+  assert.deepEqual(input.foo['bar.baz'], this.get('foo[bar.baz]'));
+
+  // remove existing keys
+  this.del('foo.bar.baz');
+  assert.deepEqual(input.foo['bar.baz'], this.get('foo[bar.baz]'));
+
+  this.del('foo[bar.baz]');
+  assert.deepEqual({bar:{}}, this.get('foo'));
+
+  this.del('foo');
+
+  // add new items
+  this.set('foo', 'bar');
+  this.set('a.b.c', 'baz');
+  this.set('a[b.c]', 'baz');
+
+  this.set('x', 'foo for x')
+        .set('y', 'bar for y')
+        .set('z', 'baz for z')
+        .set('[x.y.z]', 'boom for [x.y.z]')
+        ;
+
+  // save the changes
+  save(function(err)
+  {
+    assert.ifError(err);
+    // compare saved
+    assert.deepEqual(expected, require(updateFile));
+    doneUpdate = true;
+  });
+});
+
+// almost done
 process.on('exit', function()
 {
-  assert.ok(doneInput, 'input tests has not passed');
-  assert.ok(doneOutput, 'output tests has not passed');
+  assert.ok(doneInput, 'input tests have not passed');
+  assert.ok(doneOutput, 'output tests have not passed');
+  assert.ok(doneUpdate, 'update tests have not passed');
 });