Network condition testing in Testing Fundamentals - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to simulate a network delay of 2 seconds in a test.

Testing Fundamentals

def test_network_delay():
    import time
    time.[1](2)
    assert True

Drag options to blanks, or click blank then click option'

Asleep

Bwait

Cdelay

Dpause

Attempts:

3 left

💡 Hint

Common Mistakes

Using non-existent functions like time.wait or time.delay.

The time.sleep() function pauses the program for the given number of seconds, simulating network delay.

2fill in blank

medium

Complete the code to check if the network is reachable by pinging 'example.com'.

Testing Fundamentals

import subprocess

def is_network_reachable():
    response = subprocess.run(['ping', '-c', '1', '[1]'], capture_output=True)
    return response.returncode == 0

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Alocalhost

Bexample.com

C192.168.1.1

Dgoogle.com

Attempts:

3 left

💡 Hint

Common Mistakes

Using local or private IP addresses that may not reflect internet connectivity.

Using 'example.com' as the target host checks general network reachability.

3fill in blank

hard

Fix the error in the code to simulate packet loss by dropping 30% of packets in a test.

Testing Fundamentals

import random

def simulate_packet_loss():
    if random.random() [1] 0.3:
        return 'Packet dropped'
    else:
        return 'Packet sent'

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A<

B<=

C==

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using > 0.3 which causes 70% packet loss instead of 30%.

Using < 0.3 means 30% chance to drop the packet, as random.random() returns a float between 0 and 1.

4fill in blank

hard

Fill both blanks to create a test that retries a network request up to 3 times if it fails.

Testing Fundamentals

def retry_request():
    attempts = 0
    while attempts [1] 3:
        success = make_request()
        if success:
            return True
        attempts [2] 1
    return False

Drag options to blanks, or click blank then click option'

A<

B<=

C+=

D++

Attempts:

3 left

💡 Hint

Common Mistakes

Using <= 3 causes 4 attempts, using ++ is invalid in Python.

The loop runs while attempts is less than 3, and attempts is incremented by 1 each time using +=.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps URLs to their response times if response time is less than 500ms.

Testing Fundamentals

response_times = {url[1]: time for url, time in results.items() if time [2] 500 and url [3] 'http://example.com'}

Drag options to blanks, or click blank then click option'

A.upper()

B<

C!=

D.lower()

Attempts:

3 left

💡 Hint

Common Mistakes

Using .upper() instead of .lower(), using > instead of <, using == instead of !=.

The URL keys are converted to lowercase with .lower(), times less than 500 are filtered with <, and URLs not equal to 'http://example.com' are included with !=.