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diff --git a/‎32-The-Basics-of-Testing/02-hidash/index.test.js‎
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diff --git a/‎32-The-Basics-of-Testing/README.md‎
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@@ -0,0 +1,7 @@
+module.exports = {
+  forEach(arr, fn) {
+    for (let index in arr) {
+      fn(arr[index], index)
+    }
+  },
+}
@@ -0,0 +1,12 @@
+const { forEach, map } = require('./index')
+
+let sum = 0
+forEach([1, 2, 3], (value) => {
+  sum += value
+})
+
+console.log(sum)
+
+if(sum !== 6) {
+  throw new Error('Expected summing array to equal 6')
+}
@@ -2,4 +2,22 @@
 
 **folder 01**
 
-## 1. 01 Testing Overview
+## 1. 01 Testing Overview
+
+### Goals of Testing
+
+- Automate the process of ensuring that our app works as we expect
+- Keep us from having to manually click around the app to find bugs
+- Make sure the app still works as expected even after twe change something
+
+### Personal Thoughts
+
+- People spend more time setting up testing than they do writing tests
+- All testing frameworks / libraries are essentially the same
+- You don't even have to use a testing library
+
+## 2. 02 A Simple Function to Test
+
+## 3. 03 A No-Frills Testing Implementation
+
+## 4. 04 Test Driven Development