diff --git a/.babelrc b/.babelrc
deleted file mode 100644
index bd20dc1..0000000
--- a/.babelrc
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  "presets": [
-    "es2015",
-    "react"
-  ]
-}
diff --git a/.circleci/config.yml b/.circleci/config.yml
index 34f1ba9..c6ef349 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -6,8 +6,5 @@ jobs:
     working_directory: ~/react-nvd3
     steps:
       - checkout
-      - run: mkdir -p ~/react-nvd3/artifacts
       - run: npm install
       - run: ./node_modules/gulp/bin/gulp.js jest
-      - store_artifacts:
-          path: ~/react-nvd3/artifacts
diff --git a/dist/react-nvd3.js b/dist/react-nvd3.js
index dec3f50..a2371d7 100644
--- a/dist/react-nvd3.js
+++ b/dist/react-nvd3.js
@@ -1307,7 +1307,6 @@ return /******/ (function(modules) { // webpackBootstrap
 
 	exports.includes = includes;
 	exports.negate = negate;
-	exports.filterObject = filterObject;
 	exports.pick = pick;
 	exports.without = without;
 	exports.isPlainObject = isPlainObject;
@@ -1399,7 +1398,7 @@ return /******/ (function(modules) { // webpackBootstrap
 	}
 
 	/**
-	 * It replace all the {type:'function', name: 'nameOffunction'}
+	 * It replaces all the {type:'function', name: 'nameOffunction'}
 	 * ocurrences in a give object by the functions stored
 	 * in the {context} with the name {name}
 	 * @param  {Object} o         The original object to be patched
@@ -1454,7 +1453,7 @@ return /******/ (function(modules) { // webpackBootstrap
 	}
 
 	function isCallable(value) {
-	  return value && typeof value === 'function';
+	  return Boolean(value && typeof value === 'function');
 	}
 
 /***/ },
diff --git a/dist/react-nvd3.min.js b/dist/react-nvd3.min.js
index e5424c6..3fc4f4f 100644
--- a/dist/react-nvd3.min.js
+++ b/dist/react-nvd3.min.js
@@ -1 +1 @@
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\ No newline at end of file
diff --git a/package.json b/package.json
index 0c272c4..3c8e170 100644
--- a/package.json
+++ b/package.json
@@ -58,5 +58,11 @@
   "peerDependencies": {
     "react": ">=0.14.0",
     "react-dom": ">=0.14.0"
+  },
+  "babel": {
+    "presets": [
+      "es2015",
+      "react"
+    ]
   }
 }
diff --git a/src/utils.js b/src/utils.js
index bf2d232..9502b65 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -27,7 +27,7 @@ export function negate(f) {
  * @param  {Function} predicate
  * @return {Object}
  */
-export function filterObject(obj, keys, predicate) {
+function filterObject(obj, keys, predicate) {
   let result = {};
   let ks = Object.keys(obj);
 
@@ -79,7 +79,7 @@ export function isPlainObject(obj){
 }
 
 /**
- * It replace all the {type:'function', name: 'nameOffunction'}
+ * It replaces all the {type:'function', name: 'nameOffunction'}
  * ocurrences in a give object by the functions stored
  * in the {context} with the name {name}
  * @param  {Object} o         The original object to be patched
@@ -132,5 +132,5 @@ export function propsByPrefix(prefix, props) {
 }
 
 export function isCallable(value) {
-  return value && typeof value === 'function';
-}
\ No newline at end of file
+  return Boolean(value && typeof value === 'function');
+}
diff --git a/test/utils.test.js b/test/utils.test.js
index 3c5e476..c98c61a 100644
--- a/test/utils.test.js
+++ b/test/utils.test.js
@@ -1,9 +1,15 @@
 import {
   includes,
-  negate
+  negate,
+  pick,
+  without,
+  isPlainObject,
+  bindFunctions,
+  getValueFunction,
+  isCallable,
 } from '../src/utils.js';
 
-describe("The utils.includes function", () => {
+describe("Function utils.includes(array, item)", () => {
    beforeEach(() => {
      self.TestData = [ 0, 1, 2, 3];
    });
@@ -13,17 +19,16 @@ describe("The utils.includes function", () => {
      expect(includes(self.TestData, 0)).toBe.true;
    });
 
-   it('should locate a value if it does not exists', () => {
-     let TestData = [ 0, 1, 2, 3];
+   it('should not locate a value if it does not exists', () => {
      expect(includes(self.TestData, 'zero')).toBe.false;
    });
 
-   it('should Throw if non array is checked', () => {
+   it('should Throw TypeError', () => {
      expect(includes).toThrow(TypeError);
    });
 });
 
-describe("The utils.negate function", () =>  {
+describe("Function utils.negate(f)", () =>  {
    it('should make a positive producer be a negative producer', () => {
      let negator = negate(function(a) {return true;});
      expect(negator('a')).toBe.false;
@@ -34,3 +39,123 @@ describe("The utils.negate function", () =>  {
      expect(negator('a')).toBe.true;
    });
 });
+
+describe("Function utils.pick(obj, keys)", () =>  {
+   it('should return empty if empty is passed', () => {
+     expect(pick({}, ["a", "b"])).toEqual({});
+   });
+
+   it('should return empty object if no keys are passed', () => {
+     expect(pick({a: 1, b: 2}, [])).toEqual({});
+   });
+
+   it('should return only picked keys', () => {
+     expect(pick({a: 1, b: 2}, ["a"])).toEqual({a: 1});
+   });
+
+   it('should return object if all keys are passed', () => {
+     expect(pick({a: 1, b: 2}, ["a", "b", "c"])).toEqual({a: 1, b: 2});
+   });
+});
+
+describe("Function utils.without(obj, keys)", () =>  {
+   it('should return empty if empty is passed', () => {
+     expect(without({}, ["a", "b"])).toEqual({});
+   });
+
+   it('should return empty object if all keys are passed', () => {
+     expect(without({a: 1, b: 2}, ["a", "b", "c"])).toEqual({});
+   });
+
+   it('should return only unpicked keys', () => {
+     expect(without({a: 1, b: 2}, ["a"])).toEqual({b: 2});
+   });
+
+   it('should return object if all not keys passed', () => {
+     expect(without({a: 1, b: 2}, ["c"])).toEqual({a: 1, b: 2});
+   });
+});
+
+describe("Function utils.isPlainObject(obj)", () =>  {
+  it("should verify Objects as plain objects", () => {
+    let myObject = new Object();
+    expect(isPlainObject(myObject)).toBe(true);
+  });
+
+  it("should verify {} as a plain objects", () => {
+    expect(isPlainObject({a: 1, b: {}})).toBe(true);
+  });
+
+  it("should not verify String as a plain objects", () => {
+    let myString = new String("Hello");
+    expect(isPlainObject(myString)).toBe(false);
+  });
+});
+
+describe("Function utils.bindFunctions(obj, handlers)", () =>  {
+  it("It should handle empty object and empty handlers", () => {
+    expect(bindFunctions({}, {})).toEqual({});
+  });
+
+  it("It should handle empty object with any handler", () => {
+    expect(bindFunctions({}, {a: () => {}})).toEqual({});
+  });
+
+  it("It should bind functions to their references", () => {
+    let data = {a: {name: "a", type: "function"}};
+    let handlers = {a: () => {return true}};
+
+    expect(bindFunctions(data, handlers).a()).toBe(true);
+  });
+
+  it("It should bind functions to a list of references", () => {
+    let data = [{a: {name: "a", type: "function"}}];
+    let handlers = {a: () => {return true}};
+
+    expect(bindFunctions(data, handlers)[0].a()).toBe(true);
+  });
+
+  it("It should bind functions to internal references", () => {
+    let data = [{a: {a: {name: "a", type: "function"}}}];
+    let handlers = {a: () => {return true}};
+
+    expect(bindFunctions(data, handlers)[0].a.a()).toBe(true);
+  });
+});
+
+describe("Function utils.getValueFunction(v, _default)", () =>  {
+  it("It should ignore arguments that are functions", () => {
+    let f = (a) => {return a * a;}
+    let g = getValueFunction(f)
+    expect(g(2)).toBe(4);
+  });
+
+  it("It should return getter function for non function arguments", () => {
+    let a = "name"
+    let f = getValueFunction(a)
+    let testObject = {name: "react-nvd3"}
+    expect(f(testObject)).toBe("react-nvd3");
+  });
+
+  it("It should try the _default as a backup getter if first does not work", () => {
+    let a = "_x"
+    let b = "name"
+    let f = getValueFunction(a, b)
+    let testObject = {name: "react-nvd3"}
+    expect(f(testObject)).toBe("react-nvd3");
+  });
+});
+
+describe("Function utils.isCallable(value)", () => {
+  it("should determine functions are callable", () => {
+    let f = () => {return 1};
+    expect(isCallable(f)).toBe(true);
+  });
+
+  it("should determine non functions are not callable", () => {
+    expect(isCallable(undefined)).toBe(false);
+    expect(isCallable(1)).toBe(false);
+    expect(isCallable({})).toBe(false);
+    expect(isCallable("")).toBe(false);
+  });
+});