From 277155ba158f76024d897b8b98bdb4b1cf572bd8 Mon Sep 17 00:00:00 2001
From: "Kent C. Dodds" <kent@doddsfamily.us>
Date: Sat, 30 Jan 2016 22:49:52 -0700
Subject: [PATCH] WIP: Cannot get coverage quite there

---
 src/index.js          |  4 +++-
 src/pad-left.js       | 21 +++++++++++++++++++++
 test/pad-left.test.js | 20 ++++++++++++++++++++
 3 files changed, 44 insertions(+), 1 deletion(-)
 create mode 100644 src/pad-left.js
 create mode 100644 test/pad-left.test.js

diff --git a/src/index.js b/src/index.js
index bb4fe0bb..bde9df2a 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,4 +1,6 @@
 import flatten from './flatten'
 import snakeToCamel from './snake-to-camel'
+import padLeft from './pad-left'
+
+export {flatten, snakeToCamel, padLeft}
 
-export {flatten, snakeToCamel}
diff --git a/src/pad-left.js b/src/pad-left.js
new file mode 100644
index 00000000..f3b8f1ac
--- /dev/null
+++ b/src/pad-left.js
@@ -0,0 +1,21 @@
+export default padLeft
+
+/**
+ * Original Source: http://stackoverflow.com/a/34083277/971592
+ *
+ * This method will pad the left of the given string by
+ * the given size with the given character
+ *
+ * @param {String} str - The string to pad
+ * @param {Number} size - The total size to pad
+ * @param {String} padWith - The character to use for padding
+ * @return {String} - The padded string
+ */
+function padLeft(str, size, padWith) {
+  if (size <= str.length) {
+    return str
+  } else {
+    return Array(size - str.length + 1).join(padWith || '0') + str
+  }
+}
+
diff --git a/test/pad-left.test.js b/test/pad-left.test.js
new file mode 100644
index 00000000..3ce3b490
--- /dev/null
+++ b/test/pad-left.test.js
@@ -0,0 +1,20 @@
+import test from 'ava'
+import {padLeft} from '../src'
+
+test('pads left of the given string', t => {
+  const original = '123'
+  const expected = 'zz123'
+  const padLength = 5
+  const padWith = 'z'
+  const actual = padLeft(original, padLength, padWith)
+  t.same(actual, expected)
+})
+
+test('defaults to pad a zero', t => {
+  const original = '123'
+  const expected = '00123'
+  const padLength = 5
+  const actual = padLeft(original, padLength)
+  t.same(actual, expected)
+})
+