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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Day 7: Mock API Design - REST API Course</title>
<script src="https://cdn.tailwindcss.com"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css" rel="stylesheet">
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</head>
<body class="bg-gray-100">
<div class="flex h-screen">
<!-- Sidebar -->
<div class="w-64 bg-gray-800 text-white fixed h-full">
<div class="p-4">
<h1 class="text-2xl font-bold mb-8">REST API Course</h1>
<nav>
<ul class="space-y-2">
<li><a href="index.html" class="block py-2 px-4 rounded hover:bg-gray-700">Home</a></li>
<li><a href="day1.html" class="block py-2 px-4 rounded hover:bg-gray-700">Day 1: Introduction</a></li>
<li><a href="day2.html" class="block py-2 px-4 rounded hover:bg-gray-700">Day 2: GET/POST Requests</a></li>
<li><a href="day3.html" class="block py-2 px-4 rounded hover:bg-gray-700">Day 3: HTTP Status Codes</a></li>
<li><a href="day4.html" class="block py-2 px-4 rounded hover:bg-gray-700">Day 4: PUT & DELETE</a></li>
<li><a href="day5.html" class="block py-2 px-4 rounded hover:bg-gray-700">Day 5: Authentication</a></li>
<li><a href="day6.html" class="block py-2 px-4 rounded hover:bg-gray-700">Day 6: Headers & Query Params</a></li>
<li><a href="day7.html" class="block py-2 px-4 rounded hover:bg-gray-700">Day 7: Mock API Design</a></li>
<li><a href="day8.html" class="block py-2 px-4 rounded hover:bg-gray-700">Day 8: Test Automation</a></li>
<li><a href="day9.html" class="block py-2 px-4 rounded hover:bg-gray-700">Day 9: Real-Life Scenarios</a></li>
<li><a href="day10.html" class="block py-2 px-4 rounded hover:bg-gray-700">Day 10: Project</a></li>
</ul>
</nav>
</div>
</div>
<!-- Main Content -->
<div class="flex-1 ml-64 p-8">
<div class="max-w-4xl mx-auto">
<h1 class="text-4xl font-bold mb-6">Day 7: Mock API Design</h1>
<div class="bg-white rounded-lg shadow-lg p-6 mb-8">
<h2 class="text-2xl font-semibold mb-4">What is a Mock API?</h2>
<p class="mb-4">
A mock API is a simulated version of a real API that mimics its behavior. It's used for testing and development when the actual API is not available or not ready.
</p>
<h3 class="text-xl font-semibold mb-2">Benefits of Mock APIs:</h3>
<ul class="list-disc pl-6 space-y-2 mb-4">
<li>Parallel development of frontend and backend</li>
<li>Testing without affecting production data</li>
<li>Simulating different scenarios and responses</li>
<li>Reducing dependencies during development</li>
</ul>
</div>
<div class="bg-white rounded-lg shadow-lg p-6 mb-8">
<h2 class="text-2xl font-semibold mb-4">Popular Mock API Tools</h2>
<div class="grid grid-cols-1 md:grid-cols-2 gap-4">
<div class="bg-blue-50 p-4 rounded-lg">
<h3 class="text-xl font-semibold text-blue-800 mb-2">JSON Server</h3>
<p class="mb-2">A simple tool to create a REST API with zero coding.</p>
<pre><code>npm install -g json-server
json-server --watch db.json</code></pre>
</div>
<div class="bg-green-50 p-4 rounded-lg">
<h3 class="text-xl font-semibold text-green-800 mb-2">Mockoon</h3>
<p class="mb-2">A desktop application to create mock APIs with a user-friendly interface.</p>
<pre><code># Download from mockoon.com
# Create routes and responses visually</code></pre>
</div>
<div class="bg-purple-50 p-4 rounded-lg">
<h3 class="text-xl font-semibold text-purple-800 mb-2">Postman Mock Server</h3>
<p class="mb-2">Create mock servers directly from your Postman collections.</p>
<pre><code># Create collection
# Generate mock server
# Share mock server URL</code></pre>
</div>
<div class="bg-yellow-50 p-4 rounded-lg">
<h3 class="text-xl font-semibold text-yellow-800 mb-2">MSW (Mock Service Worker)</h3>
<p class="mb-2">API mocking library for browser and Node.js.</p>
<pre><code>npm install msw --save-dev
# Create mock handlers
# Setup worker</code></pre>
</div>
</div>
</div>
<div class="bg-white rounded-lg shadow-lg p-6 mb-8">
<h2 class="text-2xl font-semibold mb-4">Creating a Mock API with JSON Server</h2>
<h3 class="text-xl font-semibold mb-2">Step 1: Create db.json</h3>
<pre><code>{
"users": [
{
"id": 1,
"name": "John Doe",
"email": "john@example.com"
},
{
"id": 2,
"name": "Jane Smith",
"email": "jane@example.com"
}
],
"posts": [
{
"id": 1,
"title": "First Post",
"body": "This is the first post",
"userId": 1
}
]
}</code></pre>
<h3 class="text-xl font-semibold mb-2 mt-4">Step 2: Start the Server</h3>
<pre><code>json-server --watch db.json --port 3000</code></pre>
<h3 class="text-xl font-semibold mb-2 mt-4">Available Endpoints:</h3>
<ul class="list-disc pl-6 space-y-2">
<li>GET /users - Get all users</li>
<li>GET /users/1 - Get user with id 1</li>
<li>POST /users - Create new user</li>
<li>PUT /users/1 - Update user</li>
<li>DELETE /users/1 - Delete user</li>
</ul>
</div>
<div class="bg-white rounded-lg shadow-lg p-6">
<h2 class="text-2xl font-semibold mb-4">Practical Exercise</h2>
<p class="mb-4">Create your own mock API:</p>
<ol class="list-decimal pl-6 space-y-2">
<li>Install JSON Server</li>
<li>Create a db.json file with sample data</li>
<li>Start the mock server</li>
<li>Test all CRUD operations using Insomnia</li>
<li>Add custom routes and responses</li>
<li>Implement error scenarios</li>
</ol>
</div>
<div class="bg-white rounded-lg shadow-lg p-6 mb-8">
<h2 class="text-2xl font-semibold mb-4">Practice Questions</h2>
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<h3 class="text-xl font-semibold text-blue-800 mb-2">Multiple Choice</h3>
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<p class="font-semibold mb-2">1. What is the main purpose of a mock API?</p>
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<label class="flex items-center">
<input type="radio" name="q1" class="mr-2">
A. To test authentication
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B. To simulate API responses without a real backend
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C. To deploy production APIs
</label>
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<p class="font-semibold mb-2">2. Which tool is commonly used for creating mock APIs?</p>
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<label class="flex items-center">
<input type="radio" name="q2" class="mr-2">
A. Insomnia
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<label class="flex items-center">
<input type="radio" name="q2" class="mr-2">
B. Postman
</label>
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<input type="radio" name="q2" class="mr-2">
C. Both A and B
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<h3 class="text-xl font-semibold text-green-800 mb-2">True/False</h3>
<div class="space-y-4">
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<p class="font-semibold mb-2">3. Mock APIs can help frontend developers work independently of backend teams.</p>
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True
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False
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<p class="font-semibold mb-2">4. Mock APIs always return real data from a database.</p>
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<input type="radio" name="q4" class="mr-2">
True
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False
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<div class="bg-purple-50 p-4 rounded-lg">
<h3 class="text-xl font-semibold text-purple-800 mb-2">Practical Exercise</h3>
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<div class="p-3 bg-white rounded shadow">
<p class="font-semibold mb-2">5. Using a mock API tool (like Postman or Insomnia):</p>
<div class="space-y-2">
<p class="text-sm text-gray-600">a) What status code do you get for a successful GET request to your mock endpoint?</p>
<input type="number" class="border rounded p-2 w-24" placeholder="Status code">
<p class="text-sm text-gray-600">b) What is a sample JSON response you defined?</p>
<input type="text" class="border rounded p-2 w-full" placeholder="Paste a sample JSON or key value">
</div>
</div>
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<div class="mt-6">
<button class="bg-blue-500 text-white px-4 py-2 rounded hover:bg-blue-600" onclick="checkAnswers()">
Check Answers
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