From 0717c11d15b54a2ca692385e8189ab94801f511a Mon Sep 17 00:00:00 2001
From: LavrL <llembersk@gmail.com>
Date: Tue, 13 Feb 2018 17:07:06 +0000
Subject: [PATCH 1/2] Fixed issue #1

---
 src/calculator.js      | 36 ++++++++++--------------------------
 src/calculator.test.js |  2 +-
 2 files changed, 11 insertions(+), 27 deletions(-)

diff --git a/src/calculator.js b/src/calculator.js
index b46080e5..9e6665ea 100644
--- a/src/calculator.js
+++ b/src/calculator.js
@@ -1,11 +1,4 @@
-exports._check = () => {
-  // DRY up the codebase with this function
-  // First, move the duplicate error checking code here
-  // Then, invoke this function inside each of the others
-  // HINT: you can invoke this function with exports._check()
-};
-
-exports.add = (x, y) => {
+exports._check = (x, y) => {
   if (typeof x !== 'number') {
     throw new TypeError(`${x} is not a number`);
   }
@@ -15,33 +8,24 @@ exports.add = (x, y) => {
   return x + y;
 };
 
+
+exports.add = (x, y) => {
+  exports._check(x, y);
+  return x + y;
+};
+
 exports.subtract = (x, y) => {
-  if (typeof x !== 'number') {
-    throw new TypeError(`${x} is not a number`);
-  }
-  if (typeof y !== 'number') {
-    throw new TypeError(`${y} is not a number`);
-  }
+  exports._check(x, y);  
   return x - y;
 };
 
 exports.multiply = (x, y) => {
-  if (typeof x !== 'number') {
-    throw new TypeError(`${x} is not a number`);
-  }
-  if (typeof y !== 'number') {
-    throw new TypeError(`${y} is not a number`);
-  }
+  exports._check(x, y);
   return x * y;
 };
 
 exports.divide = (x, y) => {
-  if (typeof x !== 'number') {
-    throw new TypeError(`${x} is not a number`);
-  }
-  if (typeof y !== 'number') {
-    throw new TypeError(`${y} is not a number`);
-  }
+  exports._check(x, y);
   return x / y;
 };
 
diff --git a/src/calculator.test.js b/src/calculator.test.js
index d0f85ed6..3d6b7f74 100644
--- a/src/calculator.test.js
+++ b/src/calculator.test.js
@@ -1,7 +1,7 @@
 /* eslint-disable no-unused-expressions */
 const calculator = require('./calculator');
 
-describe.skip('_check', () => {
+describe('_check', () => {
   beforeEach(() => {
     sinon.spy(calculator, '_check');
   });

From 8a5acbea65e748c53f37260dfb92301bb9f4b30d Mon Sep 17 00:00:00 2001
From: LavrL <llembersk@gmail.com>
Date: Tue, 13 Feb 2018 18:31:35 +0000
Subject: [PATCH 2/2] Fixed trailing space issue

---
 src/calculator.js | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/calculator.js b/src/calculator.js
index 9e6665ea..f1ae76d8 100644
--- a/src/calculator.js
+++ b/src/calculator.js
@@ -8,14 +8,13 @@ exports._check = (x, y) => {
   return x + y;
 };
 
-
 exports.add = (x, y) => {
   exports._check(x, y);
   return x + y;
 };
 
 exports.subtract = (x, y) => {
-  exports._check(x, y);  
+  exports._check(x, y);
   return x - y;
 };