关于后端:EECS-4313感想体会

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EECS 4313 Project – YuRide Web Testing and Learning
Challenge

  1. Design Goals
    The goal of this project is to practice white box testing on a real world web application. You will utilize Python and
    Selenium to practice testing on both frontend and backend on a website and the APIs developed by YuRide.
    YuRide is a Ride-Sharing service founded by YorkU Alumni. They allow us to perform testing on their source code and
    web app in order to help you see a real world example and apply your knowldege that you have gained in this course on
    a real project.
    This project consists of 3 parts, and you will write tests cases using the tools outlined below. You must follow good
    coding practice and design in order to achieve good grades for this project:
    Good test cases are essential for a robust software, and you must write these test cases to cover all the required
    aspects.
    Test cases should be well-defined, desireably with no duplication, and cover all the edge cases.
    Documentation principle: Try to write the tests so that it includes all the elements needed to understand the
    technique(s) that you are using.
    1.1 Prerequisite
    You will need to get yourself familiar with the following technologies, as well as installing them on your local machine
    because you are required to use them in order to complete this project.
    RESTful APIs
    In order to perform API testing, you need to know the definition of APIs. Since we are going to write tests on web
    service APIs, and these APIs adhere to the REST architectural constraints, so they are called RESTful APIs.
    To learn more about the definition of RESTful APIs, you can visit the following links:
    What is REST – REST API Tutorial
    What is a REST API? | IBM – REST API (Introduction) – GeeksforGeeks
    The APIs developed by YuRide are RESTful APIs, and we will write unit tests on them.
    requests Module
    We are going to use Python module requests for writing tests on APIs. Install the module by though pip, the Python
    package manager:
    pip install requests
    You can learn more about the module by reading it’s documentation here.
    Selenium
    Selenium framework in Python is an extremely popular tool that is used by many developers and testers to automate
    their web tasks.
    Using pip, you can install selenium like this:
    pip install selenium
    Selenium also requires a driver to interface with the chosen browser,

Download the driver according to your browser, make sure it’s in your PATH, e. g., place it in /usr/bin or /usr/local/bin.
For more information, you can refer to the official documentation.

  1. Getting Started
    Create a Python file, named it test_yuride.py, and in the .py file, put the following:
    import requests
    response = requests.get(‘https://dev.yuride.network/’)
    print(response)
    Run it, what’s the output?
    It should be 200, which is status code OK, if you need a refresher on HTTP requests, check out this.
    This is how you send a GET request to an URL using Python module requests.
    But how do we convert this to a test case? We simply create a unittest class:
    import requests
    import unittest
    class TestYuride(unittest.TestCase):
    def test_ping(self):
    response = requests.get(“https://dev.yuride.network/”)
    self.assertEqual(response.status_code, 200)
    if name == “__main__”:
    unittest.main()
    If we run this file, it will show us OK. This is a simple example on how we write tests for APIs.
  2. Requirements
    3.1 Learning Challenge 1
    For the first learning challenge, we will focus on white-box testing on 3 API endpoints.
    Please following good coding standard, as this is also part of the grading. Feel free to create helper functions, write
    additional assertions or test cases as you wish.
    Create a folder named tests, and put all the API test files in there.
    Assuming the base URL is https://dev.yuride.network/, write unit tests for the following endpoints:

/api/token/
The endpoint /api/token/ returns the current refresh and access tokens for a user, given the user’s username and
Browser Driver download
Chrome https://sites.google.com/chro…
Edge https://developer.microsoft.c…
Firefox https://github.com/mozilla/ge…
Safari https://webkit.org/blog/6900/…
password.
Request:
Route: /api/token/
Method: POST
Request payload (JSON):

{
“username”: “string”,
“password”: “string”
}
Response:
Response code: 200
Response body (JSON):

{
“refresh”: “string”,
“access”: “string”
}
TODO
==Create test file: test_token.py, and write the following unit tests in the test file.==
test_token
Test function name: test_token
Request payload: arbitrary username and password
Assertion:
○ Status code is 200
○ Verify both refresh and access tokens are returned

test_token_random
Test function name: test_token_random
Request payload: randomly generated username and password with 5 letters
Assertion:
○ Status code is 200
○ Verify both refresh and access tokens are returned

test_token_no_username
Test function name: test_token_no_username
Request payload: arbitrary password, but empty username
Assertion:
○ Status code is 400

test_token_no_password
Test function name: test_token_no_password
Request payload: arbitrary username, but empty password
Assertion:
○ Status code is 400

test_token_no_body
Test function name: test_token_no_body
Request payload: nothing
Assertion:
○ Status code is 400

Report
==You need to produce a report.pdf file.==
Choose your favorite editor to answer the following questions.
The two tokens are needed to communicate the authentication of a user to the server so that the user would not need to
log in every single time they access the webpage.
Q1: What happens when we send the requests with the same username and password? Hint: you can try to send
the request and print the response in a scratch file to see.
Q2: What if we enter a different password but the same username, what is the response this time?
Q3: Is this secure behavior? How would you improve the functionality? (Just describe with words is fine)
==Please answer the above questions in a formal and professional manner, you should group your answers in their
corresponding sections, and include code snippet with outputs if needed.==

/api/token/refresh/
Takes a refresh type JSON web token and returns an access type JSON web token if the refresh token is valid.
Request:
Route: /api/token/refresh/
Method: POST
Request payload (JSON):

{
“refresh”: “string”
}
Response:
Response code: 200
Response body (JSON):

{
“access”: “string”
}
TODO
==Create test file: test_refresh.py, and write the following unit tests in the test file.==
test_refresh
Test function name: test_refresh
Request payload: a valid refresh token
Assertion:
○ Status code is 200
○ Verify the access token is returned

test_refresh_no_body
Test function name: test_refresh_no_body
Request payload: nothing
Assertion:
○ Status code is 400

test_refresh_invalid_token
Test function name: test_refresh_invalid_token
Request payload: an invalid refresh token
Assertion:
○ Status code is 401
○ The value of field code in response is token_not_valid

Report
Q1: Why do we need a refresh token, isn’t the access token alone enough for the authentication process?
Q2: Given a valid fresh token and the server returns a new access token, does this work with the other way
around? Provide your thoughts and some explanation.

/api/users/me
Returns the information on the given user.
Request:
Route: /api/users/me/
Method: GET
Response:
Response code: 200
Response body (JSON):

{
“username”: “string”,
“email”: “string”,
“photo_url”: “string”,
“first_name”: “string”,
“last_name”: “string”,
…
}
TODO
==Create test file: test_users.py, and write the following unit tests in the test file.==
This API will return the information on the required user, and you will need to put the access token in your request
header.
Generate the access token using the endpoint mentioned in the previous part, with the username and password of your
choice.
test_me
Test function name: test_me
Request header: access token
Assertion:
○ Status code is 200
○ Verify the returned username is the same as the one you created

test_me_invalid_token
Test function name: test_me_invalid_token
Request header: an invalid access token
Assertion:
○ Status code is 403
○ The value of field code in response is token_not_valid

test_me_no_token
Test function name: test_me_no_token
Request header: nothing
Assertion:
○ Status code is 403

Report
Q1: How is the server identifying which user is sending the requests? Do you think this a secure way?
Q2: Since we only have an endpoint to retrieve the user information, could you think of any additional endpoints
regarding the state of the current user?
○ Write at least 3 endpoints in the same format as above (specify the request, response, route etc.)
○ Justify why do you think these endpoints are needed, and your reasons of choosing the method, request body
etc.

This conclude the first learning challenge, you should have improved your understanding on RESTful APIs, white-box
testing, HTTP requests, and web authentication.
3.2 Learning Challenge 2
For the second learning challenge, we are going to use Selenium to conduct UI testing.
Before we proceed, make sure you complete the Selenium installation in the previous chapter.
You can refer to the official documentation for how to use Selenium.
TODO
==Start a new script named test_ui.py, use the same unittest class, test format in the previous challenge, and Import
selenium libraries including webdriver.==
In the Unit Test class, leverage Selenium to achieve the following functionality:

  1. Use Selenium to navigate to https://dev.yuride.network
  2. Verify the website title is `Your Website
  3. Make Selenium click the Sign In button on the left
  4. Wait until Passport York Login page is loaded
  5. Use Selenium to enter your own Passport York credentials and login
  6. Click the Send Me a Push button
  7. Wait until you manually confirm the login request on your device
  8. Wait until the login redirect OR click the redirect link
  9. Verify in the body, there’s the H1 element with content DASHBOARD (successfully logged in)

After the correct implementation, the expected behavior is:

  1. A browser window opened automatically
  2. Navigated to the YuRide website and sign in
  3. Passport York credentials are entered and 2 factor authentication is passed through your own intervention
  4. Login successful and you are redirected to the Dashboard page
    It’s your own responsibility to figure out how to install/use new tools, utilize all the necessary information you
    could find online (documentation, tutorials etc.) to help you learn the new tools.
    Report
    Walk us though your testing script, design overview, reasons for the method calls, accompany with screenshots of your
    testing scripts running with your browser opened by Selenium. (if things are happening too fast, you can always make
    the script wait implicitly)
    ==!!!BEFORE YOU SUBMIT, remove your Passport York credentials in your test file!!!==

This conclude the second learning challenge, you should have leaned how to do frontend UI testing using Selenium as
well as improved HTML knowledge.
3.3 Learning Challenge 3
In this last challenge, we are focusing on investigating some privacy topics.

  1. Navigate to YuRide dev website: https://dev.yuride.network/
  2. Log yourself in using your own Passport York credentials
  3. After logging in, go to https://dev.yuride.network/ap…
    Report
    Answer the following questions in a small essay fashion, in 100-200 words:
  4. What information do you find about yourself on the YuRide platform?
  5. Can you see your Passport York username? What has it became and Why?
  6. What would YuRide need to obtain to collect your information and store it?
  7. What do you suggest YuRide should do to securely store your information?

This conclude the third and final learning challenge, you should feel safe on logging into YuRide with your Passport
York now.

  1. To Submit
    You should submit a zip file with the following structure:
    yuride.zip
    │
    │
    ├───tests/
    │ │
    │ ├───test_refresh.py
    │ │
    │ ├───test_token.py
    │ │
    │ ├───test_ui.py
    │ │
    │ └───test_users.py
    │
    │
    └───report.pdf
    ==!!!BEFORE YOU SUBMIT, remove your Passport York credentials in the test_ui file!!!==
    WX：codehelp
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发表至： 后端
2022-08-17
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