feat(getObjectSize): Add getObjectSize method and tests (#37)

Closes #36

Author: mtheoryx

.gitignore

@@ -2,3 +2,4 @@ dist
 node_modules
 .nyc_output/
 coverage/
+npm-debug.log

package.json

@@ -31,6 +31,7 @@
   "devDependencies": {
     "ava": "0.16.0",
     "babel-cli": "6.11.4",
+    "babel-eslint": "6.1.2",
     "babel-plugin-istanbul": "1.0.3",
     "babel-preset-es2015": "6.13.2",
     "babel-preset-stage-2": "6.13.0",
@@ -41,6 +42,9 @@
     "cz-conventional-changelog": "1.1.7",
     "eslint": "3.2.2",
     "eslint-config-kentcdodds": "9.0.3",
+    "eslint-plugin-ava": "3.0.0",
+    "eslint-plugin-babel": "3.3.0",
+    "eslint-plugin-import": "1.13.0",
     "ghooks": "1.3.2",
     "nodemon": "1.10.0",
     "npm-run-all": "2.3.0",

src/get-object-size.js

@@ -0,0 +1,19 @@
+export default getObjectSize
+
+/**
+ * @module getObjectSize
+ * @description Returns the size of an object
+ *
+ * Original Source: http://stackoverflow.com/a/6700/4038230
+ *
+ * @param {Object} obj - The Object to check size of
+ * @return {Number} - The size of the Object
+ * */
+
+function getObjectSize(obj) {
+  if (Array.isArray(obj)) {
+    return obj.length
+  } else {
+    return Object.keys(obj).length
+  }
+}

src/index.js

@@ -6,6 +6,7 @@ import randomInteger from './random-integer'
 import arrayFill from './array-fill'
 import sortObjectsArray from './sort-objects-array'
 import objectValuesToString from './object-values-to-string'
+import getObjectSize from './get-object-size'
 
 
 export {
@@ -17,4 +18,5 @@ export {
   arrayFill,
   sortObjectsArray,
   objectValuesToString,
+  getObjectSize,
 }

test/get-object-size.test.js

@@ -0,0 +1,34 @@
+import test from 'ava';
+import { getObjectSize } from '../src'
+
+test('returns zero for empty object', t=> {
+    const testObject = {}
+    const expected = 0
+    const actual = getObjectSize(testObject)
+    t.deepEqual(actual, expected)
+})
+test('returns 5 for object with 5 keys', t=> {
+    const testObject = {
+        prop1: 'prop1',
+        prop2: 'prop2',
+        prop3: 'prop3',
+        prop4: 'prop4',
+        prop5: 'prop5',
+    }
+    const expected = 5
+    const actual = getObjectSize(testObject)
+    t.deepEqual(actual, expected)
+})
+test('returns size of empty array', t => {
+    const testArray = []
+    const expected = 0
+    const actual = getObjectSize(testArray)
+    t.deepEqual(actual, expected)
+})
+test('returns size of array with items', t => {
+    const testArray = ['test', 'test2']
+    const expected = 2
+    const actual = getObjectSize(testArray)
+    t.deepEqual(actual, expected)
+})
+