Arithmetic

.eslintignore

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+**/node_modules/*
+**/vendor/*
+**/*.min.js
+**/coverage/*
+**/build/*

.eslintrc

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+{
+  "rules": {
+    "no-console": "off",
+    "indent": [ "error", 2 ],
+    "quotes": [ "error", "single" ],
+    "semi": ["error", "always"],
+    "linebreak-style": [ "error", "unix" ]
+  },
+  "env": {
+    "es6": true,
+    "node": true,
+    "mocha": true,
+    "jasmine": true
+  },
+  "ecmaFeatures": {
+    "modules": true,
+    "experimentalObjectRestSpread": true,
+    "impliedStrict": true
+  },
+  "extends": "eslint:recommended"
+}

.gitignore

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+# Created by https://www.gitignore.io/api/osx,vim,node,macos,windows
+
+### macOS ###
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+### Node ###
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+# Thumbnails
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+# Directories potentially created on remote AFP share
+
+### Vim ###
+# swap
+[._]*.s[a-v][a-z]
+[._]*.sw[a-p]
+[._]s[a-v][a-z]
+[._]sw[a-p]
+# session
+Session.vim
+# temporary
+.netrwhist
+*~
+# auto-generated tag files
+tags
+
+### Windows ###
+# Windows thumbnail cache files
+Thumbs.db
+ehthumbs.db
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+Desktop.ini
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+# Recycle Bin used on file shares
+$RECYCLE.BIN/
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+# Windows Installer files
+*.cab
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+# Windows shortcuts
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+# End of https://www.gitignore.io/api/osx,vim,node,macos,windows

README.md

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-![CF](https://camo.githubusercontent.com/70edab54bba80edb7493cad3135e9606781cbb6b/687474703a2f2f692e696d6775722e636f6d2f377635415363382e706e67) 01: Node Ecosystem
-===
+## Lab-james Documentation
+  * index.js calls functions ./lib/greet.js and ./lib/arithmetic.js functions only accepting proper parameters
+    * greet.js returns 'null' if anything other than a string is passed in.
+    * arithmetic.js returns 'a is NaN!', etc. if a or b is not passed in an integer in either the arithmetic.add or arithmetic.sub methods.
+  * arithmetic-test.js and greet-test.js test the above functionality.
 
-## Submission Instructions
-  * work in a fork of this repository
-  * work in a branch on your fork
-  * write all of your code in a directory named `lab-` + `<your name>` **e.g.** `lab-susan`
-  * submit a pull request to this repository
-  * submit a link to your pull request on canvas
-  * submit a question, observation, and how long you spent on canvas  
-
-## Resources  
-* [node assert docs](https://nodejs.org/dist/latest-v4.x/docs/api/assert.html)
-* [mocha docs](http://mochajs.org/#getting-started)
-
-## Requirements
-
-#### Configuration  
-<!-- list of files, configurations, tools, etc that are required -->
-* include the following:
-  * **README.md** - contains documentation about your lab
-  * **.gitignore** - contains a robust `.gitignore` file
-  * **.eslintrc** - contains the provided `.eslintrc` file
-  * **.eslintignore** - contains the provided `.eslintignore` file
-  * **lib/** - should contain your modules
-  * **test/** - should contain your unit tests
-
-#### Feature Tasks  
-* create a node.js module (`greet.js`) that exports a single function
-  * the `greet` function should have a single parameter that should expect a string as it's input
-  * the `greet` function should return the input name, concatenated with "hello <name>"
-  * the `greet` function should return `null` if the input is not a string
-* create a node.js module named `arithmetic.js`
-  * this module should have `add` and `sub` methods
-  * the `add` method should contain 2 parameters
-    * these parameters should be numbers and the method should return the sum of the 2 numbers
-  * the `sub` method should contain 2 parameters
-    * these parameters should be numbers and the method should return the first number minus the second number
-* decide on the expected behavior for non-number inputs
-
-#### Testing  
-* write a test the expects the greet module to return "hello world!"
-  * this should happen when invoked with "world!" as a parameter
-* write a test for the `add` and `subtract` methods on the arithmetic module
-  * this should ensure that your functions work with number inputs
-
-####  Documentation  
-* write a description of your project (this should be in your `README.md` file)
-
-###### BONUS 1pt
-* write a test that expects the greet module to return null when you use non string values
-* write a test that ensures the functions work as expected with non number inputs
-
-## Rubric  
-* 2pts configuration
-* 3pts feature tasks
-* 3pts tests
-* 2pts documentation

index.js

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+'use strict';
+
+const greet = require('./lib/greet.js');
+const arithmetic = require('./lib/arithmetic.js')
+
+greet.greet('world');
+
+arithmetic.add(2, 2);
+arithmetic.sub(4, 2);

lib/arithmetic.js

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+'use strict';
+module.exports = exports = {};
+
+exports.add = function(num1, num2){
+  if(arguments.length === 0) throw new Error ('add no numbers provided');
+  console.log(num1 + num2);
+  return num1 + num2;
+};
+
+exports.sub = function(num1, num2){
+  if (arguments.length === 0) throw new Error ('sub no numbers provided');
+  console.log(num1 - num2);
+  return num1 - num2;
+};

lib/greet.js

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+'use strict';
+
+module.exports = exports = {};
+
+exports.greet = function(name){
+  if (arguments.length === 0) throw new Error ('name not provided');
+  console.log(`hello ${name}`);
+  return `hello ${name}!`;
+}

test/arithmetic-test.js

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+'use strict';
+
+const arithmetic = require('../lib/arithmetic.js')
+const assert = require('assert');
+
+describe('Arithmetic Module', function(){
+  describe('#add', function(){
+    it('should return 4', function(){
+      var add = arithmetic.add(2, 2);
+      assert.ok(add === 4, 'not equal to 4');
+    });
+    it('should throw a missing number error', function(){
+      assert.throws(function(){
+        arithmetic.add();
+      }, 'error not thrown')
+    });
+    it('should return NaN if numbers were not used', function(){
+      assert.throws(function(){
+        var addnan = arithmetic.add('dog', 'cat');
+        assert.ok(addnan === NaN, 'not equal to NaN')
+      })
+    });
+  });
+  describe('#sub', function(){
+    it('should return 2', function(){
+      var sub = arithmetic.sub(4, 2);
+      assert.ok(sub === 2, 'not equal to 2');
+    });
+    it('should throw a missing number error', function(){
+      assert.throws(function(){
+        arithmetic.sub();
+      }, 'error not thrown')
+    });
+    it('should return NaN if numbers were not used', function(){
+      assert.throws(function(){
+        var subnan = arithmetic.sub('cat', 'dog');
+        assert.ok(subnan === NaN, 'not equal to NaN')
+      })
+    });
+  });
+})

test/greet-test.js

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+'use strict';
+
+const greet = require('../lib/greet.js');
+const assert = require('assert');
+
+describe('Greet Module', function(){
+  describe('#greet', function(){
+    it('should return hello world!', function(){
+      var greetResult = greet.greet('world');
+      assert.ok(greetResult === 'hello world!', 'not equal to hello world!')
+    });
+    it('should throw a missing name error', function(){
+      assert.throws(function(){
+        greet.greet();
+      }, 'error not thrown')
+    });
+    it('should return null if not a string', function(){
+      assert.throws(function(){
+        var greetnull = greet.greet(6);
+        assert.ok(greetnull === null, 'not equal to null')
+      })
+    })
+  });
+});