create npm package and add index.js and tests

.eslintrc

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+{
+  "extends": "airbnb-base",
+  "rules": {
+    "no-use-before-define": [
+      "error", {
+        "functions": false
+      }
+    ],
+    "linebreak-style": 0
+  },
+  "env": {
+    "browser": true
+  }
+}

.npmrc

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+package-lock=false

index.js

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+
+
+function jeffsum(number, textType) {
+  return 'hello';
+}
+
+module.exports = jeffsum;

package.json

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+{
+  "name": "jeffsum",
+  "version": "0.0.1",
+  "description": "Jeff Goldblum text placeholder generator of pure amazingness.",
+  "license": "MIT",
+  "author": "Christopher Voigt <[email protected]>",
+  "homepage": "http://jeffsum.com/",
+  "main": "index.js",
+  "scripts": {
+    "lint": "eslint --quiet index.js test/**/*.js",
+    "test": "mocha"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/chlorophyllkid/jeffsum.git"
+  },
+  "bugs": {
+    "url": "https://github.com/chlorophyllkid/jeffsum/issues"
+  },
+  "keywords": [
+    "jeff",
+    "goldblum",
+    "lorem",
+    "ipsum",
+    "generator"
+  ],
+  "devDependencies": {
+    "chai": "^4.2.0",
+    "eslint": "^5.11.0",
+    "eslint-config-airbnb-base": "^13.1.0",
+    "eslint-plugin-import": "^2.14.0",
+    "mocha": "^5.2.0"
+  }
+}

test/jeffsum.spec.js

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+/* global describe, it */
+
+const { assert } = require('chai');
+
+const jeffsum = require('../index.js');
+
+describe('jeffsum', () => {
+  it('should return 5 characters on jeffsum(5, "characters")', () => {
+    const text = jeffsum(5, 'characters');
+    assert.lengthOf(text, 5);
+  });
+});