Implement the solution to capitalize each word in a given string, write tests

Author: somekindofwallflower

08_capitalize/index.js

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+// --- Directions
+// Write a function that accepts a string.  The function should
+// capitalize the first letter of each word in the string then
+// return the capitalized string.
+// --- Examples
+//   capitalize('a short sentence') --> 'A Short Sentence'
+//   capitalize('a lazy fox') --> 'A Lazy Fox'
+//   capitalize('look, it is working!') --> 'Look, It Is Working!'
+
+// Solution 1
+// function capitalize(str) {
+//     let result = [];
+//     for(let word of str.split(" ")) {
+//         result.push(`${word[0].toUpperCase()}${word.slice(1)}`)
+//     }
+//     return result.join(" ")
+// }
+
+// Solution 2
+// Create a string with the first element of the string capitalized
+// For each character of the string if the character on the left is space capitalize and add to the result else add it to the result
+function capitalize(str) {
+    let result = str[0].toUpperCase();
+    for(let i = 1; i <= str.length; i++) {
+        if(str[i - 1] === ' ') {
+            result += str[i].toUpperCase();
+        } else {
+            result += str[i]
+        }
+    }
+    return result;
+}
+
+module.exports = capitalize;

08_capitalize/test.js

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+const capitalize = require('./index');
+
+test('Capitalize is a function', () => {
+    expect(typeof capitalize).toEqual('function');
+});
+
+test('capitalizes the first letter of every word in a sentence', () => {
+    expect(capitalize('hi there, how is it going?')).toEqual(
+        'Hi There, How Is It Going?'
+    );
+});
+
+test('capitalizes the first letter', () => {
+    expect(capitalize('i love breakfast at bill miller bbq')).toEqual(
+        'I Love Breakfast At Bill Miller Bbq'
+    );
+});