Add examples

examples/guess-the-number/game.js

@@ -0,0 +1,33 @@
+export class Game {
+  /**
+   * A number guessing game.
+   * @param {number} minimum - The minimum number to guess.
+   * @param {number} maximum - The maximum number to guess.
+   */
+  constructor(minimum, maximum) {
+    this.secretNumber = Math.ceil(Math.random() * maximum - minimum) + minimum;
+    this.guesses = new Set();
+
+    console.log(`Guess the number between ${minimum} and ${maximum}.`);
+  }
+
+  /**
+   * Make a guess for the secret number.
+   * @param {number} number - The number to guess.
+   */
+  guess(number) {
+    if (this.guesses.has(number)) {
+      return 'You already guessed that number!';
+    }
+
+    this.guesses.add(number);
+
+    if (number < this.secretNumber) {
+      return 'Too low!';
+    } else if (number > this.secretNumber) {
+      return 'Too high!';
+    } else if (number === this.secretNumber) {
+      return `Correct! You guessed the number in ${this.guesses.size} attempts.`;
+    }
+  }
+}

examples/guess-the-number/index.js

@@ -1,38 +1,34 @@
-// Import the readline module to handle user input
+import { Game } from './game.js';
+import chalk from 'chalk';
 import { createInterface } from 'readline';
 
-// Create an interface for reading from stdin (standard input)
 const rl = createInterface({
   input: process.stdin,
   output: process.stdout,
 });
 
-// Generate a random number between 1 and 100
-const randomNumber = Math.floor(Math.random() * 100) + 1;
-let attempts = 0;
+let game = new Game(1, 100);
 
-// Function to handle user's guess
-function askQuestion() {
-  rl.question('Guess the number (between 1 and 100): ', (answer) => {
+function startGame() {
+  rl.question(`Guess ${chalk.cyanBright('→')} `, (answer) => {
     const guess = parseInt(answer, 10);
-    attempts++;
 
     // Check if the user's guess is correct
     if (isNaN(guess)) {
-      console.log('Please enter a valid number.');
-      askQuestion(); // Ask again if input is invalid
-    } else if (guess < randomNumber) {
-      console.log('Too low!');
-      askQuestion(); // Ask again
-    } else if (guess > randomNumber) {
-      console.log('Too high!');
-      askQuestion(); // Ask again
+      console.log(chalk.red('Please enter a valid number.'));
+      startGame();
+    }
+
+    const result = game.guess(guess);
+
+    console.log(result);
+
+    if (result.startsWith('Correct')) {
+      rl.close();
     } else {
-      console.log(`Correct! You guessed the number in ${attempts} attempts.`);
-      rl.close(); // End the game
+      startGame();
     }
   });
 }
 
-// Start the game by asking the first question
-askQuestion();
+startGame();

examples/guess-the-number/package.json

@@ -21,5 +21,8 @@
     "@vitest/ui": "^2.1.1",
     "vite": "^5.4.5",
     "vitest": "^2.1.1"
+  },
+  "dependencies": {
+    "chalk": "^5.3.0"
   }
 }

examples/yearbook/package.json

@@ -0,0 +1,24 @@
+{
+  "name": "yearbook",
+  "version": "1.0.0",
+  "main": "index.js",
+  "type": "module",
+  "scripts": {
+    "test": "vitest"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/stevekinney/testing-javascript.git"
+  },
+  "author": "Steve Kinney <hello@stevekinney.net>",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/stevekinney/testing-javascript/issues"
+  },
+  "homepage": "https://github.com/stevekinney/testing-javascript#readme",
+  "devDependencies": {
+    "@vitest/ui": "^2.1.1",
+    "vite": "^5.4.5",
+    "vitest": "^2.1.1"
+  }
+}

examples/yearbook/person.js

@@ -0,0 +1,31 @@
+export class Person {
+  /**
+   * A person in the yearbook.
+   * @param {string} firstName
+   * @param {string} lastName
+   * @param {string} dateOfBirth
+   */
+  constructor(firstName, lastName, dateOfBirth) {
+    this.firstName = firstName;
+    this.lastName = lastName;
+    this.dateOfBirth = dateOfBirth;
+  }
+
+  get fullName() {
+    return `${this.firstName} ${this.lastName}`;
+  }
+
+  get age() {
+    const today = new Date();
+    const birthDate = new Date(this.dateOfBirth);
+
+    let age = today.getFullYear() - birthDate.getFullYear();
+    const month = today.getMonth() - birthDate.getMonth();
+
+    if (month < 0 || (month === 0 && today.getDate() < birthDate.getDate())) {
+      age--;
+    }
+
+    return age;
+  }
+}

examples/yearbook/person.test.js

@@ -0,0 +1,9 @@
+import { describe, expect, it } from 'vitest';
+import { Person } from './person';
+
+describe('Person', () => {
+  it('should be an instance of a Person', () => {
+    const person = new Person('John', 'Doe', '2000-01-01');
+    expect(person).toBeInstanceOf(Person);
+  });
+});

package-lock.json

@@ -18,7 +18,8 @@
         "examples/characters",
         "examples/accident-counter",
         "packages/css-configuration",
-        "packages/utility-belt"
+        "packages/utility-belt",
+        "examples/yearbook"
       ],
       "devDependencies": {
         "prettier": "^3.3.3",
@@ -102,12 +103,27 @@
     "examples/guess-the-number": {
       "version": "1.0.0",
       "license": "MIT",
+      "dependencies": {
+        "chalk": "^5.3.0"
+      },
       "devDependencies": {
         "@vitest/ui": "^2.1.1",
         "vite": "^5.4.5",
         "vitest": "^2.1.1"
       }
     },
+    "examples/guess-the-number/node_modules/chalk": {
+      "version": "5.3.0",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-5.3.0.tgz",
+      "integrity": "sha512-dLitG79d+GV1Nb/VYcCDFivJeK1hiukt9QjRNVOsUtTy1rR1YJsmpGGTZ3qJos+uw7WmWF4wUwBd9jxjocFC2w==",
+      "license": "MIT",
+      "engines": {
+        "node": "^12.17.0 || ^14.13 || >=16.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/chalk?sponsor=1"
+      }
+    },
     "examples/task-list": {
       "version": "1.0.0",
       "license": "MIT",
@@ -153,6 +169,15 @@
         "vitest": "^2.1.1"
       }
     },
+    "examples/yearbook": {
+      "version": "1.0.0",
+      "license": "MIT",
+      "devDependencies": {
+        "@vitest/ui": "^2.1.1",
+        "vite": "^5.4.5",
+        "vitest": "^2.1.1"
+      }
+    },
     "node_modules/@adobe/css-tools": {
       "version": "4.4.0",
       "resolved": "https://registry.npmjs.org/@adobe/css-tools/-/css-tools-4.4.0.tgz",
@@ -6609,6 +6634,10 @@
         "node": ">=8"
       }
     },
+    "node_modules/yearbook": {
+      "resolved": "examples/yearbook",
+      "link": true
+    },
     "packages/css-configuration": {
       "version": "1.0.0",
       "license": "MIT",

package.json

@@ -4,7 +4,7 @@
   "description": "A set of examples and exercises for Steve Kinney's \"Introduction to Testing\" course for Frontend Masters.",
   "main": "index.js",
   "scripts": {
-    "test": "vitest",
+    "test": "echo \"Please run the tests from inside one of the examples!\" && exit 0",
     "format": "prettier --write ."
   },
   "repository": {
@@ -35,7 +35,8 @@
     "examples/characters",
     "examples/accident-counter",
     "packages/css-configuration",
-    "packages/utility-belt"
+    "packages/utility-belt",
+    "examples/yearbook"
   ],
   "devDependencies": {
     "prettier": "^3.3.3",